Blueberry hydroponic device and hydroponic method thereof

Abstract

The application relates to the technical field of water culture devices, and particularly discloses a blueberry water culture device and a water culture method thereof, which comprises a liquid storage tank, both ends of the liquid storage tank are fixedly connected with butt joints, the top of the liquid storage tank is fixedly connected with a supporting plate through a connecting rod, the supporting plate is provided with a plurality of mounting holes, a planting basket is inserted into the mounting holes, and the device further comprises a movable box which is inserted into the liquid storage tank, both sides of the movable box are fixedly connected with butt plates, both sides of the movable box are provided with pushers, and the pushers are used for upwardly lifting the butt plates; the movable box is controlled to intermittently ascend and descend, so that the oxygen supply of blueberry roots can be ensured in the process of realizing the tidal water culture.

Description

Technical Field

[0001] This invention relates to the field of hydroponic devices, and more particularly to a blueberry hydroponic device and hydroponic method thereof. Background Technology

[0002] In the process of hydroponic cultivation of blueberries, if the blueberry roots are directly immersed in the nutrient solution for a long time, root hypoxia can easily occur. Therefore, current technology generally adopts a tidal nutrient solution cultivation mode, which reduces the probability of root necrosis due to hypoxia by allowing the blueberry roots to come into intermittent contact with the nutrient solution.

[0003] However, existing tidal culture techniques, which rely on a unified system to control the liquid level, have two significant drawbacks: First, when the culture solution reaches the root system, the water flow fluctuations are large, easily impacting and damaging some of the fragile new blueberry roots, thus adversely affecting their normal growth and development. Second, in large-scale seedling production, some seedlings inevitably wither, and the roots of these withered seedlings are prone to breakage. Since the various culture boxes in existing tidal culture systems are interconnected, broken root fragments can spread widely with the flow of nutrient solution, clogging the culture solution pipes and affecting the hydroponic effect. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as large water flow fluctuations causing significant root damage, and to propose a blueberry hydroponic device and method.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a blueberry hydroponic device, comprising a liquid storage tank, both ends of which are fixedly connected to connecting pipes, a support plate fixed to the top of the liquid storage tank via a connecting rod, the support plate having multiple mounting holes, and a planting basket inserted into the mounting holes, characterized in that it further comprises:

[0006] The movable box is inserted inside the liquid storage tank. Both sides of the movable box are fixed with docking plates, and both sides of the movable box are provided with pushing members, which are used to push the docking plates upward.

[0007] A water inlet trough is provided at the bottom of the movable box. A sealing plate is slidably connected inside the water inlet trough. A sliding rod is fixed to the bottom of the sealing plate. A fixing plate is fixed to the bottom of the water inlet trough. The bottom of the sliding rod passes through the fixing plate and extends outward. A first spring is fixed between the sealing plate and the fixing plate. Multiple water inlet holes are provided on the surface of the fixing plate. A one-way valve is fixed inside each water inlet hole.

[0008] The first filter screen is frame-shaped and is fixed to the bottom of the sealing plate.

[0009] Specifically, the storage tank is connected to the existing tidal delivery system, with an inlet and an outlet at each end. Fresh culture medium enters through the inlet connector and exits through the outlet connector. Furthermore, the storage tank contains a movable chamber with an inlet trough at its bottom. When the movable chamber is at its lowest position, hydraulic pressure lifts the sealing plate, causing the first filter screen at the bottom of the sealing plate to rise simultaneously. The culture medium in the storage tank passes through the check valve and the first filter screen before entering the movable chamber. During this inflow, the first filter screen prevents large particles from entering the tank. Particles of impurities enter the movable box, while also preventing impurities from entering the storage tank from the movable box. As liquid gradually enters the movable box, the hydraulic force gradually decreases. When the hydraulic force is less than the elastic force of the first spring, the sealing plate can be pulled downwards by the elastic force of the first spring. Since a one-way valve is installed on the water inlet of the fixed plate, the one-way valve prevents the water flow from moving in the opposite direction. Thus, when the sealing plate descends, the water in the water inlet will flow to the outside of the filter screen, causing the impurities around the filter screen to move away from the filter screen, thereby preventing impurities from accumulating around the filter screen and causing the filter screen to jam.

[0010] After the water inlet tank is sealed and closed by the sealing plate, the liquid in the movable box separates from the liquid in the storage tank, which fluctuates greatly, and gradually returns to a calm state. After standing for a period of time, the pushing parts on both sides of the movable box are activated. The pushing parts are electric push rods. By activating the electric push rods, the movable box is pushed up, so that the culture solution in the movable box comes into contact with the plant roots. At this time, the liquid fluctuation is small, which is beneficial to the protection of the new roots of blueberries.

[0011] After hydroponics for a period of time, the movable box is lowered by pulling an electric actuator to separate the nutrient solution from the blueberry roots, thus preventing the blueberry roots from lacking oxygen. By controlling the intermittent rising and falling of the movable box, the oxygen supply to the blueberry roots can be guaranteed during the tidal hydroponics process.

[0012] Preferably, a drainage groove is provided on the bottom surface of the liquid storage tank, and a telescopic pipe is provided in the drainage groove. The telescopic pipe includes a telescopic part and a horizontal part. The telescopic part is fixed to the inner wall of the drainage groove, the top of the telescopic part is fixedly connected to the horizontal part, a drainage hole is provided at the bottom of the telescopic part, a drainage valve is fixed inside the drainage hole, and a float plate is fixed on the outer wall of the horizontal part.

[0013] Specifically, a float plate is fixed to the bottom of the horizontal section of the telescopic tube. As the water level rises, the float plate, under the action of buoyancy, drives the horizontal section of the telescopic tube to gradually rise, ensuring that the center of the opening in the horizontal section is always level with the water surface. The drain valve is an electrically controlled valve. After the drain valve is opened, the liquid in the movable box can enter the horizontal section and the telescopic section, and then be discharged from the drain valve. Thus, during hydroponics, the liquid inside the movable box is gradually discharged. On the one hand, during the drainage process, the center of the opening in the horizontal section is always level with the water surface, so there is no drop or eddy current during drainage. The nutrient solution flows smoothly into the telescopic tube, preventing friction and pulling damage to the delicate blueberry roots, which helps to strengthen the protection of the blueberry root system. On the other hand, during the drainage process, the liquid in the movable box flows slowly in one direction, which promotes uniform mixing of the liquid in the box, which helps to improve the uniformity of contact between the nutrient solution and the roots, and ensures the stability of nutrient absorption by the plant.

[0014] Since some of the liquid in the movable box is drained first, during the descent of the movable box, the sliding rod first contacts the inner wall of the storage tank. Under the obstruction of the storage tank, the sliding rod and the sealing plate and the first filter screen connected to it stop moving. At this time, the movable box continues to descend, causing the drainage channel and the sealing plate to move relative to each other, thereby reopening the water inlet channel. This allows fresh culture medium from the storage tank to enter the movable box. The first filter screen can isolate root fragments in the movable box, thereby preventing the root fragments from spreading widely and clogging the culture medium delivery pipes.

[0015] Preferably, a U-shaped baffle is fixed to the end of the horizontal section, the U-shaped baffle is positioned directly above the water inlet tank, and a second filter screen is fixed to the end of the horizontal section.

[0016] Specifically, since the opening of the horizontal section is always level with the liquid level, floating impurities on the water surface can easily enter the telescopic pipe during drainage, clogging the drain valve. While a filter screen can block floating impurities, these impurities may accumulate at the second filter screen location, affecting the liquid drainage speed. This invention addresses this by using a U-shaped baffle to block floating impurities in advance. During water intake, the liquid flows into the horizontal section from the bottom of the U-shaped baffle, thus isolating floating impurities while maintaining drainage speed. Even if a small amount of impurities enters between the U-shaped baffle and the second filter screen, when the subsequent water intake tank is filled, the fresh culture medium rushes in and directly impacts the area between the U-shaped baffle and the second filter screen, flushing out the impurities and completing the self-cleaning function.

[0017] Preferably, a strip groove is formed on the top surface of the support plate, and an installation groove is formed on the bottom surface of the strip groove. A pressure sensor is fixed inside the installation groove, and a sliding plate is slidably connected inside the strip groove. An elastic column is fixed at the bottom of the sliding plate, and the elastic column contacts the top of the pressure sensor. The pressure sensor is used to monitor whether there is abnormal seedling cultivation. When the monitoring result is normal seedling cultivation, the drain valve is opened, and when the monitoring result is abnormal seedling cultivation, the drain valve is closed.

[0018] Preferably, the pusher has at least a first stroke and a second stroke, the distance value of the first stroke is greater than the distance value of the second stroke, when the monitoring result is normal seedling cultivation, the pusher performs reciprocating movement in the first stroke, and when the monitoring result is abnormal seedling cultivation, the pusher performs reciprocating movement in the second stroke.

[0019] Preferably, the top surface of the planting basket is provided with a positioning hole, the top of the sliding plate is provided with a plurality of sliding grooves, a slider is slidably connected in the sliding groove, a second spring is fixed between the slider and the inner wall of the sliding groove, a positioning pin is fixed on the top of the slider, and the positioning pin is inserted into the positioning hole.

[0020] Preferably, a gear is rotatably connected to one side of the slider, a rack is provided on one side of the gear, the rack meshes with the gear, a third spring is fixed between the rack and the slide groove, an electromagnet is fixed on the side wall of the slide groove, and the rack is made of ferromagnetic material.

[0021] Preferably, the bottom of the liquid storage tank is provided with a groove, an aeration pipe is fixed in the groove, an aeration nozzle is fixed at the top of the aeration pipe, and the aeration nozzle passes through the liquid storage tank and extends into the interior of the liquid storage tank.

[0022] Preferably, a top plate is fixed to the top of the support plate by a connecting rod, and multiple docking rods are fixed to the top of the top plate, and a docking groove is provided at the bottom of the liquid storage tank.

[0023] A method for hydroponically cultivating blueberries, comprising the following steps:

[0024] Step 1: Connect the various storage tanks in series. Fresh culture medium is delivered into the storage tanks and then enters the movable tank from the water inlet tank.

[0025] Step 2: Control the moving box to rise during the first stroke to hydroponically culture the seedling roots;

[0026] Step 3: Open the drain valve to drain the liquid in one direction. After the liquid is drained, control the movable box to descend and start the liquid in.

[0027] Step four: Obtain abnormal seedling information monitored by the pressure sensor, control the drain valve to close, and the movable box to perform the second stroke of reciprocating movement.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] I. This invention uses an electric actuator to push the movable box upwards, allowing the nutrient solution inside the box to come into contact with the plant roots. At this time, the liquid fluctuation is small, which helps to protect the newly formed roots of the blueberry. After a period of hydroponics, the electric actuator pulls the movable box downwards, causing the nutrient solution to separate from the blueberry roots, thus preventing the blueberry roots from lacking oxygen. By controlling the intermittent rising and falling of the movable box, the oxygen supply to the blueberry roots can be guaranteed during the tidal hydroponics process.

[0030] II. In this invention, by first draining a portion of the liquid from the movable box, during the controlled descent of the movable box, the sliding rod first contacts the inner wall of the storage tank. Under the obstruction of the storage tank, the sliding rod, the sealing plate connected to it, and the first filter screen stop moving. At this time, the movable box continues to descend, causing the drainage trough and the sealing plate to move relative to each other, thereby reopening the water inlet trough and allowing fresh culture medium from the storage tank to enter the movable box. The first filter screen can isolate root fragments in the movable box, thereby preventing the root fragments from spreading widely and clogging the culture medium delivery pipes. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0032] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention.

[0033] Figure 3 For the present invention Figure 2 A magnified structural diagram at point A in the diagram.

[0034] Figure 4 This is a schematic cross-sectional view of the liquid storage tank of the present invention.

[0035] Figure 5 For the present invention Figure 4 A magnified structural diagram at point B in the diagram.

[0036] Figure 6 This is a schematic cross-sectional view of the sliding plate structure of the present invention.

[0037] Figure 7 This is a schematic diagram of the bottom structure of the liquid storage tank of the present invention.

[0038] Figure 8 This is a flowchart of the hydroponic method of the present invention.

[0039] In the diagram: 1. Storage tank; 2. Connecting pipe; 3. Connecting rod; 4. Support plate; 5. Mounting hole; 6. Planting basket; 7. Movable box; 8. Connecting plate; 9. Pushing component; 10. Water inlet trough; 11. Sealing plate; 12. Sliding rod; 13. Fixing plate; 14. First spring; 15. Water inlet hole; 16. One-way valve; 17. First filter screen; 18. Drainage trough; 19. Telescopic pipe; 20. Telescopic part; 21. Horizontal part; 22. Drainage hole; 23. Drainage valve; 24. 25. Float plate; 26. U-shaped baffle; 27. Second filter screen; 28. Strip groove; 29. ​​Mounting groove; 30. Pressure sensor; 31. Sliding plate; 32. Elastic column; 33. Positioning hole; 34. Slide groove; 35. Sliding block; 36. Second spring; 37. Positioning pin; 38. Gear; 39. Rack; 40. Third spring; 41. Electromagnet; 42. Groove; 43. Aeration pipe; 44. Aeration nozzle; 45. Top plate; 46. Connecting rod; 47. Connecting groove. Detailed Implementation

[0040] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0041] like Figures 1 to 7 The blueberry hydroponic device shown includes a liquid storage tank 1, with connecting pipes 2 fixedly connected to both ends of the liquid storage tank 1. A support plate 4 is fixed to the top of the liquid storage tank 1 via a connecting rod 3. The support plate 4 has multiple mounting holes 5, and planting baskets 6 are inserted into the mounting holes 5. The device also includes:

[0042] The movable box 7 is inserted inside the liquid storage tank 1. Both sides of the movable box 7 are fixed with docking plates 8. Both sides of the movable box 7 are provided with pushing parts 9, which are used to push the docking plates 8 upward.

[0043] A water inlet 10 is located at the bottom of the movable box 7. A sealing plate 11 is slidably connected inside the water inlet 10. A sliding rod 12 is fixed to the bottom of the sealing plate 11. A fixing plate 13 is fixed to the bottom of the water inlet 10. The bottom of the sliding rod 12 passes through the fixing plate 13 and extends outward. A first spring 14 is fixed between the sealing plate 11 and the fixing plate 13. Multiple water inlet holes 15 are opened on the surface of the fixing plate 13. A one-way valve 16 is fixed inside the water inlet holes 15.

[0044] The first filter screen 17 is frame-shaped and is fixed to the bottom of the sealing plate 11.

[0045] Specifically, the storage tank 1 is connected to the existing tidal delivery system, with an inlet and an outlet at its two ends. Fresh culture medium enters through the connector 2 at the inlet and exits through the connector 2 at the outlet. Furthermore, the storage tank 1 contains a movable tank 7, with a water inlet trough 10 at its bottom. When the movable tank 7 is at its lowest position, hydraulic pressure lifts the sealing plate 11 upwards, simultaneously raising the first filter screen 17 at the bottom of the sealing plate 11. The culture medium in the storage tank 1 passes through the one-way valve 16 and the first filter screen 17 before entering the movable tank 7. During this liquid inflow, the first filter screen 17 prevents large particles from entering. Particles of impurities enter the movable box 7, and impurities are also prevented from entering the liquid storage tank 1 from the movable box 7. As the liquid gradually enters the movable box 7, the hydraulic action gradually decreases. When the hydraulic action is less than the elastic force of the first spring 14, the sealing plate 11 can be pulled downward by the elastic force of the first spring 14. Since a one-way valve 16 is installed on the water inlet 15 of the fixed plate 13, the one-way valve 16 prevents the water flow from moving in the opposite direction. As the sealing plate 11 descends, the water in the water inlet trough 10 will flow to the outside of the filter screen, which will drive the impurities around the filter screen to move away from the filter screen, thereby preventing impurities from accumulating around the filter screen and causing the filter screen to jam.

[0046] After the water inlet tank 10 is sealed and closed by the sealing plate 11, the liquid in the movable box 7 is separated from the liquid in the storage tank 1, which has large fluctuations, and gradually returns to a calm state. After standing for a period of time, the pushers 9 on both sides of the movable box 7 are activated. The pushers 9 are electric push rods. By activating the electric push rods, the movable box 7 is pushed up, so that the culture solution in the movable box 7 comes into contact with the plant roots. At this time, the liquid fluctuations are small, which is beneficial to the protection of the new roots of the blueberry.

[0047] After hydroponics for a period of time, the movable box 7 is lowered by pulling the electric actuator, so that the culture medium is separated from the blueberry roots, thus avoiding oxygen deficiency in the blueberry roots. By controlling the intermittent rise and fall of the movable box 7, the oxygen supply to the blueberry roots can be guaranteed during the tidal hydroponics process.

[0048] As a further embodiment of the present invention, a drainage groove 18 is provided on the bottom surface of the liquid storage tank 1, and a telescopic pipe 19 is provided in the drainage groove 18. The telescopic pipe 19 includes a telescopic part 20 and a horizontal part 21. The telescopic part 20 is fixed to the inner wall of the drainage groove 18, the top of the telescopic part 20 is fixedly connected to the horizontal part 21, and a drainage hole 22 is provided at the bottom of the telescopic part 20. A drainage valve 23 is fixed inside the drainage hole 22, and a float plate 24 is fixed on the outer wall of the horizontal part 21.

[0049] Specifically, a float plate 24 is fixed to the bottom of the horizontal section 21 of the telescopic tube 19. As the water level rises, the float plate 24 can drive the horizontal section 21 of the telescopic tube 19 to gradually rise under the action of buoyancy, so that the middle of the opening of the horizontal section 21 is always flush with the water surface. The drain valve 23 is an electrically controlled valve. After the drain valve 23 is opened, the liquid in the movable box 7 can enter the horizontal section 21 and the telescopic section 20 and then be discharged from the drain valve 23. Thus, during the hydroponic process, the liquid inside the movable box 7 is gradually discharged. On the one hand, during the drainage process, the middle of the opening of the horizontal section 21 is always flush with the water surface, so there is no drop or eddy during drainage. The nutrient solution flows smoothly into the telescopic tube 19, and the fragile roots of blueberries are not damaged by friction or pulling, which helps to strengthen the protection of the blueberry root system. On the other hand, during the drainage process, the liquid in the movable box 7 flows slowly in one direction, which can promote the uniform mixing of the liquid in the box, which helps to improve the uniformity of the contact between the nutrient solution and the root system and ensure the stability of the plant's nutrient absorption.

[0050] Since some of the liquid in the movable box 7 was drained first, during the process of controlling the descent of the movable box 7, the slide rod 12 first contacts the inner wall of the storage tank 1. Under the obstruction of the storage tank 1, the slide rod 12 and the sealing plate 11 and the first filter screen 17 connected to it stop moving. At this time, the movable box 7 continues to descend, causing the drainage trough 18 and the sealing plate 11 to move relative to each other, thereby causing the water inlet trough 10 to reopen, and then allowing fresh culture medium in the storage tank 1 to enter the movable box 7. The first filter screen 17 can isolate the root fragments in the movable box 7, thereby preventing the root fragments from spreading over a large area and blocking the culture medium delivery pipe.

[0051] As a further embodiment of the present invention, a U-shaped baffle 25 is fixed to the end of the horizontal part 21, the U-shaped baffle 25 is disposed directly above the water inlet tank 10, and a second filter screen 26 is fixed to the end of the horizontal part 21.

[0052] Specifically, since the middle of the opening of the horizontal section 21 is always level with the liquid surface, during the drainage process, floating impurities on the water surface can easily enter the interior of the telescopic tube 19 and clog the drain valve 23. A filter screen can block the floating impurities. However, the blocked impurities may accumulate at the position of the second filter screen 26, affecting the liquid discharge speed. This invention uses a U-shaped baffle 25 to block the floating impurities in advance. When water is introduced, the liquid flows into the interior of the horizontal section 21 from the bottom of the U-shaped baffle 25, thereby isolating the floating impurities while ensuring the drainage speed. Even if a small amount of impurities enter between the U-shaped baffle 25 and the second filter screen 26, when the subsequent water inlet tank 10 is filled, the fresh culture medium rushes in from the water inlet tank 10 and can directly impact the area between the U-shaped baffle 25 and the second filter screen 26, flushing out the impurities and completing the self-cleaning function.

[0053] As a further embodiment of the present invention, a strip groove 27 is provided on the top surface of the support plate 4, and an installation groove 28 is provided on the bottom surface of the strip groove 27. A pressure sensor 29 is fixed inside the installation groove 28, and a sliding plate 30 is slidably connected inside the strip groove 27. An elastic column 31 is fixed at the bottom of the sliding plate 30. The elastic column 31 contacts the top of the pressure sensor 29. The pressure sensor 29 is used to monitor whether there is abnormal seedling cultivation. When the monitoring result is normal seedling cultivation, the drain valve 23 is opened. When the monitoring result is abnormal seedling cultivation, the drain valve 23 is closed.

[0054] Specifically, in large-scale seedling cultivation, some seedlings inevitably wither. Traditional tidal hydroponic devices require strong fixation of the planting basket 6 due to large water flow fluctuations. Therefore, seedling monitoring can only be performed using cameras. Setting up a small number of cameras results in significant errors, while setting up a large number of cameras incurs high costs. In this invention, the water flow fluctuations are small, the weight of withered seedlings decreases, and the top gradually dries, making the seedlings lighter. Utilizing this characteristic, this invention places the seedlings in the planting basket 6 by creating a strip groove 27 on the support plate 4. After the seedlings reach the support plate 4, the sliding plate 30 in the strip groove 27 will press down, causing the sliding plate 30 to squeeze the elastic column 31. The elastic column 31 squeezes the pressure sensor 29. When the seedlings wither, the squeezing force on the pressure sensor 29 decreases, thus determining that there are withered abnormal seedlings on the support plate 4. By connecting the hydroponic device to the existing intelligent control system, the controller can send signals to the operator, such as sending a text message to the manager's mobile phone, so as to promptly remind the manager of the seedling status. The reminder methods are mostly existing technologies, which will not be elaborated on here.

[0055] This invention enables tidal hydroponics with minimal water flow fluctuations, eliminating the need for strong fixation of the planting basket 6. This allows for efficient and low-cost monitoring of plant status using gravity detection.

[0056] Since the various storage tanks 1 are connected in series during the tidal hydroponics process, this invention can immediately stop the discharge of culture medium from the active tank 7 after detecting abnormal seedling growth, thereby reducing the degree of pollution spread in time. At the same time, the various storage tanks 1 are still connected to each other, thereby ensuring the continuity of culture medium flow and avoiding adverse effects from other storage tanks 1.

[0057] As a further embodiment of the present invention, the pusher 9 has at least a first stroke and a second stroke, the distance value of the first stroke is greater than the distance value of the second stroke. When the monitoring result is normal seedling cultivation, the pusher 9 performs reciprocating movement in the first stroke, and when the monitoring result is abnormal seedling cultivation, the pusher 9 performs reciprocating movement in the second stroke.

[0058] Specifically, when the pusher 9 reciprocates during the first stroke, the slide bar 12 contacts the inner bottom surface of the liquid storage tank 1, thereby causing the sealing plate 11 and the water inlet 10 to move relative to each other, opening the water inlet 10 and allowing fresh liquid from the outside to enter.

[0059] When the pusher 9 reciprocates during the second stroke, the moving distance of the movable box 7 becomes shorter, and the slide bar 12 will not contact the inner wall of the liquid storage tank 1, thereby preventing the water inlet 10 from opening and thus preventing external liquid from entering and causing the liquid in the movable box 7 to overflow from the top.

[0060] Furthermore, when abnormal seedling cultivation occurs, although fresh culture medium will not enter the area, the seedlings in that area can still be hydroponically cultivated during the second stroke of the pusher 9, thus avoiding significant impact on other normal seedling hydroponics in the process of preventing spread.

[0061] As a further embodiment of the present invention, a positioning hole 32 is provided on the top surface of the planting basket 6, and a plurality of sliding grooves 33 are provided on the top of the sliding plate 30. A slider 34 is slidably connected in the sliding groove 33. A second spring 35 is fixed between the slider 34 and the inner wall of the sliding groove 33. A positioning pin 36 is fixed on the top of the slider 34 and is inserted into the positioning hole 32.

[0062] Specifically, each planting basket 6 has a groove 33, and a positioning pin 36 is set on the top of the slider 34 in the groove 33. When installing the positioning basket, the positioning hole 32 on the planting basket 6 matches the positioning pin 36, so that the installation position of the planting basket 6 can be accurately found. When the seedlings in the planting basket 6 wither, the overall weight becomes lighter. During the tidal hydroponics process, when the movable box 7 is in the rising state, the planting basket 6 may rise under the action of buoyancy. In order to ensure the stability of the positioning basket, the present invention sets a movable slider 34 and positioning pin 36, which can rise synchronously with the planting basket 6, thereby preventing the positioning basket from falling off the positioning pin 36 and helping to ensure the stability of the planting basket 6.

[0063] As a further embodiment of the present invention, a gear 37 is unidirectionally rotatably connected to one side of the slider 34, a rack 38 is provided on one side of the gear 37, the rack 38 meshes with the gear 37, a third spring 39 is fixed between the rack 38 and the slide groove 33, an electromagnet 40 is fixed on the side wall of the slide groove 33, and the rack 38 is made of ferromagnetic material.

[0064] Specifically, a gear 37 is unidirectionally connected to one side of the slider 34. The rack 38 is always in close contact with and meshes with the gear 37 under the elastic force of the third spring 39. When the planting basket 6 floats up, the slider 34 rises synchronously. Then, under the unidirectional limiting action of the gear 37 and rack 38, the slider 34 cannot descend. This design can avoid the planting basket 6 from repeatedly rising and falling in each tidal cycle, thereby reducing root breakage damage caused by frequent rising and falling.

[0065] Furthermore, when there are a large number of planting baskets 6, a trigger sensor can be installed at the bottom of the third spring 39. By identifying the floating state of a single planting basket 6, the specific location of abnormal seedling cultivation can be more accurately located, providing support for the refined management of large-scale seedling cultivation.

[0066] Furthermore, after the management personnel change the seedlings, the slider 34 needs to descend to return to its initial state. At this time, by activating the electromagnet 40, the rack 38 can be attracted away from the gear 37, so that under the gravity of the planting basket 6, the slider 34 can be pressed down to reset.

[0067] As a further embodiment of the present invention, a groove 41 is provided at the bottom of the liquid storage tank 1, an aeration pipe 42 is fixed in the groove 41, an aeration nozzle 43 is fixed at the top of the aeration pipe 42, and the aeration nozzle 43 penetrates the liquid storage tank 1 and extends into the interior of the liquid storage tank 1.

[0068] Specifically, the aeration pipe 42 is connected to the aeration equipment, and gas is sprayed out from the aeration nozzle 43, thereby aeration treatment of the liquid in the storage tank 1, further increasing the oxygen supply to the roots.

[0069] As a further embodiment of the present invention, a top plate 44 is fixed to the top of the support plate 4 by a connecting rod 3, and a plurality of docking rods 45 are fixed to the top of the top plate 44, and a docking groove 46 is provided at the bottom of the liquid storage tank 1.

[0070] Specifically, by setting the top plate 44, the remaining liquid storage tanks 1 can be installed above the top plate 44, and the connecting rod 45 can be inserted into the connecting groove 46 inside the liquid storage tank 1. With the help of the vertical stacking arrangement of the liquid storage tanks 1, vertical seedling raising can be achieved, which greatly reduces the space occupation rate of seedling raising operations.

[0071] like Figure 8 The following is a method for hydroponically cultivating blueberries, which includes the following steps:

[0072] Step 1: Connect each storage tank 1 in series. Fresh culture medium is transported into the storage tank 1 and enters the movable tank 7 from the water inlet tank 10.

[0073] Step 2: Control the moving box 7 to rise in the first stroke to hydroponically culture the seedling roots;

[0074] Step 3: Open drain valve 23 for one-way drainage. After drainage is completed, control the movable box 7 to descend and allow liquid to enter.

[0075] Step four: Obtain abnormal seedling information monitored by pressure sensor 29, control the drainage valve 23 to close, and the movable box 7 to perform the second stroke of reciprocating movement.

[0076] Working principle: The storage tank 1 is connected to the existing tidal conveying system, with the inlet and outlet ends respectively. Fresh culture medium enters through the connecting pipe 2 at the inlet end and exits through the connecting pipe 2 at the outlet end. Furthermore, the storage tank 1 contains a movable tank 7, with an inlet trough 10 at its bottom. When the movable tank 7 is at its lowest position, hydraulic pressure lifts the sealing plate 11 upwards, simultaneously raising the first filter screen 17 at the bottom of the sealing plate 11. The culture medium in the storage tank 1 passes through the one-way valve 16 and the first filter screen 17 before entering the movable tank 7. During the liquid inflow, the first filter screen 17 prevents excessive... Particle impurities enter the movable box 7, and impurities are also prevented from entering the liquid storage tank 1 from the movable box 7. As the liquid gradually enters the movable box 7, the hydraulic action gradually decreases. When the hydraulic action is less than the elastic force of the first spring 14, the sealing plate 11 can be pulled downward by the elastic force of the first spring 14. Since a one-way valve 16 is installed on the water inlet 15 of the fixed plate 13, the one-way valve 16 prevents the water flow from moving in the opposite direction. As the sealing plate 11 descends, the water in the water inlet trough 10 will flow to the outside of the filter screen, causing the impurities around the filter screen to move away from the filter screen, thereby preventing impurities from accumulating around the filter screen and causing the filter screen to jam.

[0077] After the water inlet tank 10 is sealed and closed by the sealing plate 11, the liquid in the movable box 7 is separated from the liquid in the storage tank 1, which has large fluctuations, and gradually returns to a calm state. After standing for a period of time, the pushers 9 on both sides of the movable box 7 are activated. The pushers 9 are electric push rods. By activating the electric push rods, the movable box 7 is pushed up, so that the culture solution in the movable box 7 comes into contact with the plant roots. At this time, the liquid fluctuations are small, which is beneficial to the protection of the new roots of the blueberry.

[0078] After hydroponics for a period of time, the movable box 7 is lowered by pulling the electric actuator, so that the culture medium is separated from the blueberry roots, thus avoiding oxygen deficiency in the blueberry roots. By controlling the intermittent rise and fall of the movable box 7, the oxygen supply to the blueberry roots can be guaranteed during the tidal hydroponics process.

[0079] A float plate 24 is fixed to the bottom of the horizontal section 21 of the telescopic tube 19. As the water level rises, the float plate 24 can drive the horizontal section 21 of the telescopic tube 19 to gradually rise under the action of buoyancy, so that the middle of the opening of the horizontal section 21 is always flush with the water surface. The drain valve 23 is an electrically controlled valve. After the drain valve 23 is opened, the liquid in the movable box 7 can enter the horizontal section 21 and the telescopic section 20 and then be discharged from the drain valve 23. Thus, during the hydroponic process, the liquid inside the movable box 7 is gradually discharged. On the one hand, during the drainage process, the middle of the opening of the horizontal section 21 is always flush with the water surface, so there is no drop or eddy during drainage. The nutrient solution flows smoothly into the telescopic tube 19, and the fragile roots of blueberries are not damaged by friction or pulling, which helps to strengthen the protection of the blueberry root system. On the other hand, during the drainage process, the liquid in the movable box 7 flows slowly in one direction, which can promote the uniform mixing of the liquid in the box, which helps to improve the uniformity of the contact between the nutrient solution and the root system and ensure the stability of the plant's nutrient absorption.

[0080] Since some of the liquid in the movable box 7 was drained first, during the process of controlling the descent of the movable box 7, the slide rod 12 first contacts the inner wall of the storage tank 1. Under the obstruction of the storage tank 1, the slide rod 12 and the sealing plate 11 and the first filter screen 17 connected to it stop moving. At this time, the movable box 7 continues to descend, causing the drainage trough 18 and the sealing plate 11 to move relative to each other, thereby causing the water inlet trough 10 to reopen, and then allowing fresh culture medium in the storage tank 1 to enter the movable box 7. The first filter screen 17 can isolate the root fragments in the movable box 7, thereby preventing the root fragments from spreading over a large area and blocking the culture medium delivery pipe.

[0081] Since the opening of the horizontal section 21 is always level with the liquid surface, floating impurities on the water surface can easily enter the telescopic tube 19 during drainage, clogging the drain valve 23. While a filter screen can block floating impurities, the blocked impurities may accumulate at the position of the second filter screen 26, affecting the liquid discharge speed. This invention uses a U-shaped baffle 25 to block floating impurities in advance. When water is introduced, the liquid flows into the horizontal section 21 from the bottom of the U-shaped baffle 25, thus isolating floating impurities while ensuring the drainage speed. Even if a small amount of impurities enters between the U-shaped baffle 25 and the second filter screen 26, when the subsequent water inlet tank 10 is filled, the fresh culture medium rushes in from the water inlet tank 10, directly impacting the area between the U-shaped baffle 25 and the second filter screen 26, flushing out the impurities and completing the self-cleaning function.

[0082] In large-scale seedling cultivation, some seedlings inevitably wither. Traditional tidal hydroponic devices require strong fixation of the planting basket 6 due to large water flow fluctuations. Therefore, seedlings can only be detected by cameras. Setting up a small number of cameras results in large errors, while setting up a large number of cameras incurs significant costs. In this invention, the water flow fluctuations are small, the weight of withered seedlings decreases, and the top gradually dries, making the seedlings lighter. Utilizing this characteristic, this invention creates a strip groove 27 on the support plate 4. After the planting basket 6 is placed on the support plate 4, it presses down on the sliding plate 30 within the strip groove 27, causing the sliding plate 30 to squeeze the elastic column 31. The elastic column 31 then squeezes the pressure sensor 29. When the seedlings wither, the squeezing force on the pressure sensor 29 decreases, thus identifying abnormal withered seedlings on the support plate 4. By connecting the hydroponic device to an existing intelligent control system, the controller can send signals to the operator, such as sending a text message to the manager's mobile phone, to promptly remind the manager of the seedling status. The reminder methods are mostly existing technologies and will not be elaborated further here.

[0083] This invention enables tidal hydroponics with minimal water flow fluctuations, eliminating the need for strong fixation of the planting basket 6. This allows for efficient and low-cost monitoring of plant status using gravity detection.

[0084] Since the various storage tanks 1 are connected in series during the tidal hydroponics process, this invention can immediately stop the discharge of culture medium from the active tank 7 after detecting abnormal seedling growth, thereby reducing the degree of pollution spread in time. At the same time, the various storage tanks 1 are still connected to each other, thereby ensuring the continuity of culture medium flow and avoiding adverse effects from other storage tanks 1.

[0085] When the pusher 9 reciprocates during the first stroke, the slide bar 12 contacts the inner bottom surface of the liquid storage tank 1, thereby causing the sealing plate 11 and the water inlet 10 to move relative to each other, opening the water inlet 10 and allowing fresh liquid from the outside to enter.

[0086] When the pusher 9 reciprocates during the second stroke, the moving distance of the movable box 7 becomes shorter, and the slide bar 12 will not contact the inner wall of the liquid storage tank 1, thereby preventing the water inlet 10 from opening and thus preventing external liquid from entering and causing the liquid in the movable box 7 to overflow from the top.

[0087] Furthermore, when abnormal seedling cultivation occurs, although fresh culture medium will not enter the area, the seedlings in that area can still be hydroponically cultivated during the second stroke of the pusher 9, thus avoiding significant impact on other normal seedling hydroponics in the process of preventing spread.

[0088] Each planting basket 6 has a groove 33, and a positioning pin 36 is set on the top of the slider 34 in the groove 33. When installing the positioning basket, the positioning hole 32 on the planting basket 6 is matched with the positioning pin 36, so that the installation position of the planting basket 6 can be accurately located. When the seedlings in the planting basket 6 wither, the overall weight becomes lighter. During the tidal hydroponics process, when the movable box 7 is in the rising state, the planting basket 6 may rise under the action of buoyancy. In order to ensure the stability of the positioning basket, the present invention sets a movable slider 34 and positioning pin 36, which can rise synchronously with the planting basket 6, thereby preventing the positioning basket from falling off the positioning pin 36 and helping to ensure the stability of the planting basket 6.

[0089] A gear 37 is unidirectionally connected to one side of the slider 34. The rack 38 is always in close contact with and meshes with the gear 37 under the elastic force of the third spring 39. When the planting basket 6 floats up, the slider 34 rises synchronously. Then, under the unidirectional limiting action of the gear 37 and rack 38, the slider 34 cannot descend. This design can avoid the planting basket 6 from repeatedly rising and falling in each tidal cycle, thereby reducing root breakage damage caused by frequent rising and falling.

[0090] Furthermore, when there are a large number of planting baskets 6, a trigger sensor can be installed at the bottom of the third spring 39. By identifying the floating state of a single planting basket 6, the specific location of abnormal seedling cultivation can be more accurately located, providing support for the refined management of large-scale seedling cultivation.

[0091] Furthermore, after the management personnel change the seedlings, the slider 34 needs to descend to return to its initial state. At this time, by activating the electromagnet 40, the rack 38 can be attracted away from the gear 37, so that under the gravity of the planting basket 6, the slider 34 can be pressed down to reset.

[0092] Connect the aeration pipe 42 to the aeration equipment, and the gas is sprayed out from the aeration nozzle 43, thereby aeration treatment of the liquid in the storage tank 1, and further improving the oxygen supply to the roots.

[0093] By setting the top plate 44, the remaining liquid storage tanks 1 can be installed above the top plate 44. At the same time, the connecting rod 45 can be inserted into the connecting groove 46 inside the liquid storage tank 1. With the help of the vertical stacking arrangement of the liquid storage tanks 1, vertical seedling raising can be achieved, which greatly reduces the space occupation rate of seedling raising operations.

[0094] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A blueberry hydroponic device, comprising a liquid storage tank (1), both ends of which are fixedly connected to connecting pipes (2), and a support plate (4) fixed to the top of the liquid storage tank (1) via a connecting rod (3), the support plate (4) having multiple mounting holes (5), and a planting basket (6) inserted into the mounting holes (5), characterized in that, Also includes: The movable box (7) is inserted inside the liquid storage tank (1). Both sides of the movable box (7) are fixed with docking plates (8). Both sides of the movable box (7) are provided with pushing members (9). The pushing members (9) are used to push the docking plates (8) upward. A water inlet trough (10) is provided at the bottom of the movable box (7). A sealing plate (11) is slidably connected inside the water inlet trough (10). A sliding rod (12) is fixed at the bottom of the sealing plate (11). A fixing plate (13) is fixed at the bottom of the water inlet trough (10). The bottom of the sliding rod (12) passes through the fixing plate (13) and extends outward. A first spring (14) is fixed between the sealing plate (11) and the fixing plate (13). A plurality of water inlet holes (15) are provided on the surface of the fixing plate (13). A one-way valve (16) is fixed inside the water inlet hole (15). The first filter screen (17) is frame-shaped and is fixed to the bottom of the sealing plate (11).

2. The blueberry hydroponic device according to claim 1, characterized in that: The bottom surface of the liquid storage tank (1) is provided with a drainage groove (18), and a telescopic pipe (19) is provided inside the drainage groove (18). The telescopic pipe (19) includes a telescopic part (20) and a horizontal part (21). The telescopic part (20) is fixed to the inner wall of the drainage groove (18). The top of the telescopic part (20) is fixedly connected to the horizontal part (21). A drainage hole (22) is provided at the bottom of the telescopic part (20). A drainage valve (23) is fixed inside the drainage hole (22). A float plate (24) is fixed on the outer wall of the horizontal part (21).

3. The blueberry hydroponic device according to claim 2, characterized in that: A U-shaped baffle (25) is fixed to the end of the horizontal part (21), and the U-shaped baffle (25) is located directly above the water inlet tank (10). A second filter screen (26) is fixed to the end of the horizontal part (21).

4. A blueberry hydroponic device according to claim 2, characterized in that: The support plate (4) has a strip groove (27) on its top surface and an installation groove (28) on its bottom surface. A pressure sensor (29) is fixed inside the installation groove (28). A sliding plate (30) is slidably connected inside the strip groove (27). An elastic column (31) is fixed at the bottom of the sliding plate (30). The elastic column (31) is in contact with the top of the pressure sensor (29). The pressure sensor (29) is used to monitor whether there is abnormal seedling cultivation. When the monitoring result is normal seedling cultivation, the drain valve (23) is opened. When the monitoring result is abnormal seedling cultivation, the drain valve (23) is closed.

5. A blueberry hydroponic device according to claim 4, characterized in that: The pusher (9) has at least a first stroke and a second stroke. The distance value of the first stroke is greater than the distance value of the second stroke. When the monitoring result is normal seedling cultivation, the pusher (9) performs reciprocating movement in the first stroke. When the monitoring result is abnormal seedling cultivation, the pusher (9) performs reciprocating movement in the second stroke.

6. A blueberry hydroponic device according to claim 4, characterized in that: The top surface of the planting basket (6) is provided with a positioning hole (32), and the top of the sliding plate (30) is provided with multiple sliding grooves (33). A slider (34) is slidably connected in the sliding groove (33). A second spring (35) is fixed between the slider (34) and the inner wall of the sliding groove (33). A positioning pin (36) is fixed on the top of the slider (34). The positioning pin (36) is inserted into the positioning hole (32).

7. A blueberry hydroponic device according to claim 6, characterized in that: A gear (37) is rotatably connected to one side of the slider (34). A rack (38) is provided on one side of the gear (37). The rack (38) meshes with the gear (37). A third spring (39) is fixed between the rack (38) and the slide groove (33). An electromagnet (40) is fixed on the side wall of the slide groove (33). The rack (38) is made of ferromagnetic material.

8. A blueberry hydroponic device according to claim 1, characterized in that: The bottom of the liquid storage tank (1) is provided with a groove (41), an aeration pipe (42) is fixed in the groove (41), an aeration nozzle (43) is fixed at the top of the aeration pipe (42), and the aeration nozzle (43) penetrates the liquid storage tank (1) and extends into the interior of the liquid storage tank (1).

9. A blueberry hydroponic device according to claim 1, characterized in that: The top of the support plate (4) is fixed with a top plate (44) by a connecting rod (3), and a plurality of docking rods (45) are fixed on the top of the top plate (44). The bottom of the liquid storage tank (1) is provided with a docking groove (46).

10. A method for hydroponic blueberry cultivation, applicable to the hydroponic blueberry device described in any one of claims 1 to 9, characterized in that: The blueberry hydroponic method includes the following steps: Step 1: Connect the various storage tanks (1) in series. Fresh culture medium is transported into the storage tank (1) and enters the active tank (7) from the water inlet tank (10). Step 2: Control the active box (7) to rise in the first stroke to hydroponically culture the seedling roots; Step 3: Open the drain valve (23) to drain the liquid in one direction. After the liquid is drained, control the movable box (7) to descend and allow the liquid to enter. Step 4: Obtain abnormal seedling information monitored by pressure sensor (29), control the drainage valve (23) to close, and the moving box (7) to perform the second stroke of reciprocating movement.

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