A high-density soilless culture device for vegetables

Abstract

The present application relates to soilless culture technical field, specifically to a kind of vegetable high-density soilless culture device, including stand, annular shell seat and hollow extension frame, stand is vertically arranged, several annular shell seats are successively sleeved on the outer wall of stand from top to bottom, wherein, the annular shell seat at the bottom is fixed with stand, the rest annular shell seats are all limit sliding installation on stand, and second traction steel wire rope is connected between adjacent two annular shell seats;Several hollow extension frames are respectively connected in communication on the circumferential side of each annular shell seat, and several culture tubes are respectively arranged on each hollow extension frame;Traction mechanism is arranged on the circumferential side of stand near its top end.The present application utilizes annular shell seat and hollow extension frame to form shelf structure, connects between adjacent two shelves using second traction steel wire rope, cooperates with the traction of traction mechanism and gravity, can lift and pull each annular shell seat except the bottom, by placing annular shell seat to layer-by-layer stacking, it is convenient for transplanting and picking of vegetables.

Description

Technical Field

[0001] This invention relates to the field of soilless cultivation technology, specifically to a high-density soilless cultivation device for vegetables. Background Technology

[0002] Soilless cultivation is a plant cultivation technology that does not rely on traditional soil. Its core is to fix the plants in a solid substrate or to directly use nutrient solution to provide the plants with the water, nutrients and oxygen necessary for growth, while optimizing growth conditions by controlling the environment (such as temperature, light and gas). This technology can effectively avoid the obstacles of continuous cropping in soil, reduce pests and diseases, and significantly improve water and fertilizer use efficiency as well as crop yield and quality. It is widely used in facility agriculture, urban agriculture, space farming and other scenarios, and provides an important solution for agricultural production and high-efficiency crop cultivation in areas with scarce land resources and degraded soil.

[0003] Existing technologies such as tower-type cultivation racks and multi-layer cultivation racks utilize vertical space by extending multiple cultivation positions vertically. Traditional tower-type cultivation racks have several cultivation openings distributed around the perimeter of a columnar structure, without additional radial expansion structures, thus limiting the number of cultivation openings. Furthermore, regardless of whether it is a tower-type or multi-layer cultivation rack, the positions of the cultivation openings are fixed. For cultivation openings at higher positions, whether transplanting seedlings or harvesting mature vegetables, manual climbing is required, which is inconvenient and poses a safety risk. Summary of the Invention

[0004] The purpose of this invention is to provide a high-density soilless cultivation device for vegetables to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] A high-density hydroponic vegetable cultivation device includes a column, annular shells, and hollow extension frames. The column is vertically arranged, and several annular shells are fitted onto the outer wall of the column from top to bottom. The bottommost annular shell is fixed to the column, while the remaining annular shells are slidably mounted on the column, and a second traction steel wire rope connects adjacent annular shells. Several hollow extension frames are connected to the periphery of each annular shell, and several cultivation cylinders are respectively arranged on each hollow extension frame. A traction mechanism is provided on the periphery of the column near its top. The traction mechanism includes a U-shaped seat, a winding wheel, a first drive motor, and a first traction steel wire rope. The U-shaped seat is fixed to the outer wall of the column, and the winding wheel is rotatably mounted on the U-shaped seat. The first drive motor is fixed to the side of the U-shaped seat, and its output shaft is fixedly connected to the shaft end of the winding wheel. One end of the first traction steel wire rope is wound onto the winding wheel, and the other end is fixed to the topmost annular shell.

[0007] Preferably, the outer wall of the column is provided with several groups of holes at equal intervals from top to bottom, and each group of holes is formed by several replenishment holes distributed at equal intervals around the axis of the column; each annular shell seat has several inlet holes on its inner edge wall, and the number and position of the inlet holes correspond one-to-one with the replenishment holes; a temporary storage tank is connected to the top of the column; the column is a hollow structure with an opening at the top, and a replenishment module is provided inside the column.

[0008] Preferably, the liquid replenishment module includes a piston disc, a wall-climbing mechanism, a stirring mechanism, and a driving device; the piston disc is slidably installed inside the column, the wall-climbing mechanism and the driving device are located at the bottom of the piston disc, and the two work together to drive the piston disc to adjust its height; the stirring mechanism is located at the top of the piston disc, and the stirring mechanism is linked with the driving device.

[0009] Preferably, the annular shell sidewall is provided with vertically extending grooves corresponding to the positions of each liquid inlet hole; each groove is vertically fixed with a sliding rod, and each sliding rod is slidably fitted with a buoyancy block, and the buoyancy block slides and fits against the inner wall of the groove; when the buoyancy block floats to the limit position, it can block the corresponding liquid inlet hole.

[0010] Preferably, the wall-climbing mechanism includes a support frame, a shaft, and wall-adhering wheels; a pair of supports are symmetrically fixed to the lower surface of the piston disc, and a shaft is rotatably mounted on each of the two supports; wall-adhering wheels are fixedly fitted at both ends of the shaft, and the outer edges of the wall-adhering wheels are tightly fitted to the inner wall of the column; worm gears are fixedly fitted on both shafts; a bidirectional worm gear is rotatably mounted on both supports through a mounting bracket, and the two sides of the bidirectional worm gear are respectively meshed with two worm gears; the bidirectional worm gear is driven by a bevel gear set.

[0011] Preferably, the drive device includes a connecting shaft, a driven gear, a second drive motor, and a main gear; the second drive motor is fixed below the piston disc by a fixed base, and the main gear is fixed on the output shaft of the second drive motor; the connecting shaft is rotatably mounted on the bottom of the piston disc; the driven gear is fixedly fitted on the connecting shaft and meshes with the main gear; the bevel gear set includes a second bevel gear fixed at the bottom end of the connecting shaft and a first bevel gear fixed on a bidirectional worm gear; the first bevel gear meshes with the second bevel gear.

[0012] Preferably, the stirring mechanism includes a main shaft, stirring rods, and agitator blades; the main shaft is rotatably mounted on the top surface of the piston disk, and the main shaft is coaxially fixedly connected to the connecting shaft; a plurality of stirring rods are evenly distributed on the main shaft; and a plurality of agitator blades are evenly distributed on the main shaft and near the upper surface of the piston disk.

[0013] Preferably, the temporary storage tank has a liquid inlet near its top on the side, which is connected to the nutrient solution supply system via a pipe; and a liquid outlet near its bottom on the side, which is connected to the nutrient solution recovery system via a pipe.

[0014] Preferably, a slide cylinder is fixed on the bottom wall of the temporary storage tank. The slide cylinder is coaxial with the column, and the inner diameters of the two are the same. Several through outlets are evenly distributed on the slide cylinder. An annular blocking member is fixed on the inner wall of the slide cylinder near its top. The inner diameter of the annular blocking member is smaller than the diameter of the piston disc.

[0015] Preferably, the outer wall of the column is provided with a vertically extending limiting groove, and each annular shell seat except the bottom one has a limiting block fixed on its inner edge wall; the limiting blocks are all correspondingly slidably engaged in the limiting groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0017] 1. This invention sets multiple annular shell bases on the column, sets multiple hollow extension frames around each annular shell base, and sets multiple cultivation cylinders on each hollow extension frame, forming a multi-layer cultivation structure. Compared with the traditional tower-type cultivation rack, this device expands the cultivation positions of vegetable seedlings both vertically and horizontally, resulting in higher cultivation density and space utilization.

[0018] 2. This invention utilizes annular shell bases and hollow extension frames to form a layered structure. Adjacent layers are connected by a second traction steel wire rope. With the traction of the traction mechanism and gravity, each annular shell base except the bottom can be lifted and pulled. By lowering the annular shell bases into a layered stacked state, it is convenient for transplanting and harvesting vegetables.

[0019] Furthermore, the connection between two adjacent annular shell seats is a non-rigid connection via a second traction steel wire rope, which allows the spacing between the two annular shell seats to be variable. This ensures that the annular shell seats can be stacked sequentially and stably when lowered, and that the tension of the steel wire rope is transmitted synchronously when moving upwards. This eliminates the need for an additional synchronization mechanism to achieve layered movement of the annular shell seats, ensuring that the upper layer of annular shell seats can make room for the lower layer after moving upwards. The structural layout is reasonable.

[0020] 3. This invention utilizes the piston disc moving up and down within the column to drive the nutrient solution to move synchronously within the column, replenishing the nutrient solution to each layer of the hollow extension frame sequentially. This eliminates the need to fill the column with nutrient solution, reducing the cost of each nutrient solution supply.

[0021] 4. During the piston disc lifting and adjusting process, the present invention can synchronize the rotation of the main shaft, stirring rod, and agitator blades. The agitator blades are used to stir the nutrients that have settled on the top surface of the piston disc. Combined with the stirring effect of the stirring rod, this can prevent the nutrients in the nutrient solution above the piston disc from settling or accumulating in one place, so that the nutrients in the nutrient solution are evenly distributed and the nutrients replenished to each hollow extension frame are balanced. In addition, the stirring mechanism and the wall climbing mechanism share the same drive source, which reduces the drive cost. At the same time, it ensures that the piston disc movement and nutrient replenishment and the stirring work of the stirring mechanism can be carried out synchronously.

[0022] 5. In this invention, when the liquid level of the nutrient solution in the annular shell rises to a preset height, the buoyancy block floats to its limit position, which can block the liquid inlet hole, cut off the liquid replenishment channel, and prevent excessive replenishment of nutrient solution in the hollow extension frame. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0024] Figure 2 for Figure 1 The diagram shows a planar view of the structure.

[0025] Figure 3 This is a schematic diagram of the column structure in this invention;

[0026] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0027] Figure 5 This is a schematic diagram of the traction mechanism structure in this invention;

[0028] Figure 6 for Figure 5 A cross-sectional schematic diagram of the structure shown;

[0029] Figure 7 This is one of the schematic cross-sectional views of a partial structure in this invention;

[0030] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point B;

[0031] Figure 9 This is the second schematic diagram of a partial structural cross-section in this invention;

[0032] Figure 10 for Figure 9 Enlarged schematic diagram of the structure at point C;

[0033] Figure 11 This is a schematic diagram of the structure above the piston disk in this invention;

[0034] Figure 12 This is a schematic diagram of the bottom structure of the piston disk in this invention;

[0035] Figure 13 This is a schematic diagram of the installation of the slide structure in this invention.

[0036] In the diagram: 1. Column; 11. Liquid replenishment hole; 12. Limiting groove; 13. Limiting block; 2. Annular shell base; 21. Liquid inlet; 22. Slide groove; 23. Slide rod; 24. Buoyancy block; 3. Hollow extension frame; 31. Cultivation cylinder; 4. Traction mechanism; 41. U-shaped seat; 42. Winding reel; 43. First drive motor; 44. First traction wire rope; 45. Second traction wire rope; 5. Temporary storage tank; 51. Liquid inlet; 52. Liquid outlet. 6. Piston disc; 7. Wall-climbing mechanism; 71. Bracket; 72. Shaft; 73. Wall-adhering traveling wheel; 74. Bidirectional worm gear; 75. Worm wheel; 76. First bevel gear; 77. Second bevel gear; 8. Stirring mechanism; 81. Main shaft; 82. Stirring rod; 83. Stirring blade; 84. Connecting shaft; 85. Driven gear; 86. Second drive motor; 87. Main gear; 9. Slide cylinder; 901. Discharge port; 91. Annular blocking component. Detailed Implementation

[0037] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0038] Example 1

[0039] Please see Figures 1-13 This invention provides a high-density soilless cultivation device for vegetables, including a column 1, an annular shell base 2, and a hollow extension frame 3. The bottom of the column 1 is fixed on a base plate (not shown in the figure), and the base plate can be fastened to the ground of the cultivation room by bolts, so that the column 1 can be stably and vertically arranged in the cultivation room. In addition, the column 1 is a hollow structure with an opening at the top, and the cross-section of the cavity inside the column 1 is circular. The top of the column 1 is connected to a temporary storage tank 5, and the nutrient solution in the temporary storage tank 5 can flow into the column 1.

[0040] A number of annular shell seats 2 are fitted on the outer wall of the column 1 from top to bottom. The inner edge of the annular shell seat 2 is tightly slidably fitted to the outer wall of the column 1. The bottommost annular shell seat 2 is fixed to the column 1, while the remaining annular shell seats 2 are slidably installed on the column 1. A second traction steel wire rope 45 is connected between adjacent annular shell seats 2. A number of hollow extension frames 3 are connected to the periphery of each annular shell seat 2. A number of cultivation cylinders 31 are set on each hollow extension frame 3. The cultivation cylinders 31 are connected to the inner cavity of the hollow extension frame 3. The inner cavity of the hollow extension frame 3 is used to store nutrient solution. When vegetable seedlings are transplanted into the cultivation cylinders 31, the roots of the vegetable seedlings will extend downward and be immersed in the nutrient solution, thereby achieving the supply of nutrients to the vegetable seedlings.

[0041] like Figure 3 As shown, the outer wall of column 1 is provided with several groups of holes at equal intervals from top to bottom, combined with... Figure 4Each hole group is formed by several replenishment holes 11 equidistantly distributed around the axis of the column 1. The replenishment holes 11 are through holes. Several inlet holes 21 are provided on the inner edge wall of each annular shell 2. The number and position of the inlet holes 21 correspond one-to-one with the replenishment holes 11. A traction mechanism 4 is provided on the side of the column 1 near its top. The traction mechanism 4 is used to pull the annular shell 2 except the bottom one for lifting and adjusting. When the traction mechanism 4 drives the corresponding annular shell 2 to slide up along the outer wall of the column 1 to the limit position, the inlet holes 21 and the replenishment holes 11 are aligned and connected. The nutrient solution in the temporary storage tank 5 flows into the column 1, and then flows into the annular shell 2 through the replenishment holes 11 and the inlet holes 21 in sequence, and finally flows into each hollow extension frame 3 to supply nutrients to the roots of the vegetable seedlings.

[0042] It is worth noting that the bottom annular housing 2 is fixed to the outer wall of the column 1. Therefore, no matter how the other annular housings 2 are raised or lowered, the liquid inlet 21 on the bottom annular housing 2 and the corresponding liquid replenishment hole 11 are always aligned and connected.

[0043] This invention forms a multi-layer cultivation structure by setting multiple annular shell seats 2 on the column 1, setting multiple hollow extension racks 3 around each annular shell seat 2, and setting multiple cultivation tubes 31 on each hollow extension rack 3. Compared with the traditional tower-type cultivation rack, this device expands the cultivation positions of vegetable seedlings in both vertical and horizontal directions, resulting in higher cultivation density and space utilization.

[0044] like Figure 5 As shown, the traction mechanism 4 includes a U-shaped seat 41, a winding and unwinding reel 42, a first drive motor 43, and a first traction steel wire rope 44. The U-shaped seat 41 is fixed on the outer wall of the column 1. The winding and unwinding reel 42 is rotatably mounted on the U-shaped seat 41. The first drive motor 43 is fixed on the side of the U-shaped seat 41, and its output shaft is fixedly connected to the shaft end of the winding and unwinding reel 42. One end of the first traction steel wire rope 44 is wound onto the winding and unwinding reel 42, and the other end is fixed to the uppermost annular shell 2. The first drive motor 43 can drive the winding and unwinding reel 42 to rotate. Specifically, when the first drive motor 43 drives the winding and unwinding reel 42 to rotate forward, the winding and unwinding reel 42 can wind up the first traction steel wire rope 44. At this time, it can pull each annular shell 2 to move upward in sequence. When the first drive motor 43 drives the winding and unwinding reel 42 to rotate in reverse, the winding and unwinding reel 42 can release the first traction steel wire rope 44. At this time, each annular shell 2 can move downward under the action of gravity.

[0045] like Figure 9 and Figure 10 As shown, the specific method by which the annular housing 2 is limited and slidably mounted on the column 1 is as follows:

[0046] The outer wall of the column 1 is provided with a vertically extending limiting groove 12. Except for the bottommost one, each annular shell 2 has a limiting block 13 fixed on its inner edge wall. The limiting block 13 is slidably engaged in the limiting groove 12. By using the limiting sliding cooperation between the limiting block 13 and the limiting groove 12, it is ensured that when the corresponding annular shell 2 moves to the upper position, the liquid inlet 21 can be aligned and connected with the liquid replenishment hole 11. This avoids the liquid inlet 21 and the liquid replenishment hole 11 being misaligned due to the annular shell 2 being deflected, which would prevent the nutrient solution from flowing normally.

[0047] In addition, column 1 is equipped with a liquid replenishment module, such as... Figure 6 As shown, the replenishment module includes a piston disc 6, a wall-climbing mechanism 7, a stirring mechanism 8, and a driving device. The piston disc 6 is slidably installed inside the column 1. The wall-climbing mechanism 7 and the driving device are located at the bottom of the piston disc 6. The two work together to drive the piston disc 6 to adjust its height. The stirring mechanism 8 is located at the top of the piston disc 6, and the stirring mechanism 8 works in conjunction with the driving device to stir the nutrient solution above the piston disc 6 to prevent sedimentation.

[0048] The working principle of this embodiment is as follows:

[0049] Before transplanting the vegetable seedlings, the first drive motor 43 drives the unwinding wheel 42 to reverse, rotating and releasing the first traction steel wire rope 44. Under the action of gravity, the bottommost annular shell 2 is lowered. As it continues to lower, starting from the second-to-last annular shell 2, each annular shell 2 will be stacked sequentially. At this time, all annular shell 2 are in a low position, making it convenient for workers to transplant the vegetables. After the first layer of seedlings is transplanted, the first drive motor 43 drives the unwinding wheel to rotate. Wheel 42 winds up the first traction steel wire rope 44, causing the upper hollow extension frame 3 to move up a certain height, making room for the transplanting of seedlings on the lower hollow extension frame 3. This process is repeated until the transplanting is completed. Then, the first drive motor 43 drives the winding wheel 42 to wind up the first traction steel wire rope 44 until all annular shell seats 2 except the bottom one have moved up to their limit positions (i.e., the first traction steel wire rope 44 and the second traction steel wire rope 45 are both taut). At this time, all liquid inlet holes 21 are aligned and connected with the liquid replenishment hole 11.

[0050] When replenishing the nutrient solution, the driving device and the wall-climbing mechanism 7 work together to drive the piston disc 6 to move upward along the inner wall of the column 1 to the adjacent temporary storage tank 5. At the same time, the nutrient solution in the temporary storage tank 5 flows into the column 1 and is located above the piston disc 6. Then, the driving device and the wall-climbing mechanism 7 work together to drive the piston disc 6 downward until the piston disc 6 is below the uppermost hole group. At this time, the nutrient solution above the piston disc 6 flows into the annular shell 2 through the replenishment hole 11 and the inlet hole 21, and flows into each hollow extension frame 3, thereby replenishing the nutrient solution in each hollow extension frame 3. After that, the piston disc 6 continues to move downward to the lower hole group. Similarly, the nutrient solution flows into the annular shell 2 of the next layer through the replenishment hole 11 and the inlet hole 21 at that point, thereby replenishing the nutrient solution in the lower hollow extension frame 3. This process is repeated to replenish the nutrient solution in each hollow extension frame 3.

[0051] When the vegetables are ripe and ready for harvest, the vegetables around the bottommost annular shell 2 are harvested first. Then, the first drive motor 43 drives the unwinding wheel 42 to lower the remaining annular shells 2 until the second-to-last annular shell 2 is supported and stacked on the bottommost annular shell 2. The vegetables in this layer are then harvested. The above steps are repeated until all the vegetables in each layer have been harvested.

[0052] The present invention utilizes the annular shell base 2 and the hollow extension frame 3 to form a shelf structure. The adjacent two shelves are connected by the second traction steel wire rope 45. With the traction of the traction mechanism 4 and the cooperation of gravity, the annular shell base 2 except the bottom can be lifted and pulled. By lowering the annular shell base 2 into a stacked state, it is convenient for the transplanting and harvesting of vegetables.

[0053] Since the two adjacent annular shell seats 2 are connected by a second traction steel wire rope 45 in a non-rigid connection, the distance between the two annular shell seats 2 can be changed. This ensures that the annular shell seats 2 can be stacked sequentially and stably when lowered, and the tension of the steel wire rope is transmitted synchronously when moving upward. No additional synchronization mechanism is needed to realize the layered movement of the annular shell seats 2. This ensures that after the upper layer of annular shell seats 2 moves upward, it can make room for the lower layer to operate. The structural layout is reasonable.

[0054] In addition, by using the piston disc 6 to move up and down inside the column 1 to drive the nutrient solution to move synchronously in the column 1 and replenish the nutrient solution to each layer of hollow extension rack 3 one by one, it is not necessary to fill the column 1 with nutrient solution, thus reducing the cost of each nutrient solution supply.

[0055] Example 2

[0056] Please see Figure 6 , Figure 11 and Figure 12 Based on Example 1, this example provides a detailed explanation of the wall-climbing mechanism 7, the stirring mechanism 8, and the driving device, as follows:

[0057] Specifically, the wall-climbing mechanism 7 includes a bracket 71, a shaft 72, and wall-adhering wheels 73. A pair of brackets 71 are symmetrically fixed on the lower surface of the piston disc 6. A shaft 72 is rotatably mounted on each of the two brackets 71. Wall-adhering wheels 73 are fixedly fitted at both ends of the shaft 72. The outer edge of the wall-adhering wheels 73 is tightly fitted with the inner wall of the column 1. Worm gears 75 are fixedly fitted on each of the two shafts 72. A bidirectional worm gear 74 is rotatably mounted on the two brackets 71 through a mounting bracket (not shown in the figure). The two sides of the bidirectional worm gear 74 are respectively meshed with the two worm gears 75. The bidirectional worm gear 74 is driven by the drive device through a bevel gear set.

[0058] The drive unit includes a connecting shaft 84, a driven gear 85, a second drive motor 86, and a main gear 87. The second drive motor 86 is fixed below the piston disc 6 by a fixed seat. The main gear 87 is fixed on the output shaft of the second drive motor 86. The connecting shaft 84 is rotatably mounted on the bottom of the piston disc 6. The driven gear 85 is fixedly fitted on the connecting shaft 84 and meshes with the main gear 87. The bevel gear set includes a second bevel gear 77 fixed at the bottom end of the connecting shaft 84 and a first bevel gear 76 fixed on the bidirectional worm gear 74. The first bevel gear 76 meshes with the second bevel gear 77.

[0059] The second drive motor 86 operates, and its output shaft drives the main gear 87 to rotate. The rotating main gear 87 meshes with and drives the driven gear 85, which in turn drives the connecting shaft 84 and the second bevel gear 77 to rotate. The rotating second bevel gear 77 meshes with and drives the first bevel gear 76, which in turn drives the bidirectional worm gear 74 to rotate. The two helical parts on the bidirectional worm gear 74, which are in opposite directions, mesh with and drive the two worm wheels 75 to rotate in opposite directions. This, in turn, drives the two shafts 72 and the wall-mounted traveling wheels 73 to rotate in opposite directions synchronously. Under the friction of the rotating wall-mounted traveling wheels 73 with the inner wall of the column 1, the piston disc 6 can be driven to move up and down along the inner wall of the column 1, providing a stable drive for the adjustment of the piston disc 6.

[0060] The stirring mechanism 8 includes a main shaft 81, stirring rods 82, and agitator blades 83. The main shaft 81 is rotatably mounted on the top surface of the piston disc 6, and is coaxially fixedly connected to the connecting shaft 84. Several stirring rods 82 are evenly distributed on the main shaft 81, and several agitator blades 83 are evenly distributed on the main shaft 81 near the upper surface of the piston disc 6. During the lifting and lowering adjustment of the piston disc 6, when the second drive motor 86 drives the connecting shaft 84 to rotate through the meshing of the main gear 87 and the driven gear 85, the connecting shaft 84 drives the main shaft 81 to rotate synchronously, and the rotating main shaft 81 drives... The stirring rod 82 and the agitator blade 83 move in tandem. The agitator blade 83 can stir the nutrients that have settled on the top surface of the piston plate 6. Combined with the stirring effect of the stirring rod 82, it can prevent the nutrients in the nutrient solution above the piston plate 6 from settling or accumulating in one place, so that the nutrients in the nutrient solution are evenly distributed and the nutrients in the nutrient solution replenished to each hollow extension rack 3 are balanced. In addition, the stirring mechanism 8 and the wall climbing mechanism 7 share the same drive source, which reduces the drive cost. At the same time, it ensures that the movement of the piston plate 6 to replenish the nutrient solution and the stirring work of the stirring mechanism 8 can be carried out synchronously.

[0061] Example 3

[0062] Please see Figure 7 and Figure 8 The difference between this embodiment and Embodiment 2 is that:

[0063] The annular housing 2 has vertically extending grooves 22 on its side wall corresponding to the positions of each liquid inlet 21. Each groove 22 has a vertically fixed sliding rod 23, and each sliding rod 23 has a buoyancy block 24 slidably fitted on it. The buoyancy block 24 slides and fits against the inner wall of the groove 22. When the buoyancy block 24 floats to its limit position, it can block the liquid inlet 21 accordingly.

[0064] As the liquid is continuously replenished, the liquid level inside the annular shell 2 and the hollow extension frame 3 rises. The buoyancy block 24 is buoyed and moves upward synchronously along the slide bar 23. When the liquid level of the nutrient solution inside the annular shell 2 rises to the preset height, the buoyancy block 24 floats to the limit position and blocks the liquid inlet hole 21 to cut off the liquid replenishment channel and prevent excessive replenishment of nutrient solution in the hollow extension frame 3.

[0065] When the liquid level of the nutrient solution in the annular shell 2 and the hollow extension frame 3 decreases, the buoyancy block 24 will move down synchronously under the action of gravity, so as to remove the blockage of the liquid inlet 21 and facilitate the replenishment of the nutrient solution.

[0066] Example 4

[0067] Please see Figure 5 , Figure 6 and Figure 13 The difference between this embodiment and embodiment 3 is as follows:

[0068] Specifically, the temporary storage tank 5 has a liquid inlet 51 near its top on the side, which is connected to the nutrient solution supply system (not shown in the figure) through a pipe. The temporary storage tank 5 also has a liquid outlet 52 near its bottom on the side, which is connected to the nutrient solution recovery system (not shown in the figure) through a pipe.

[0069] A slide cylinder 9 is fixed on the bottom wall of the temporary storage tank 5. The slide cylinder 9 is coaxial with the column 1 and the inner diameter of the two is the same. Several through outlets 901 are evenly distributed on the slide cylinder 9. An annular blocking member 91 is fixed on the inner wall of the slide cylinder 9 near its top. The inner diameter of the annular blocking member 91 is smaller than the diameter of the piston disc 6.

[0070] Nutrient solution is supplied into temporary storage tank 5 through inlet 51 via nutrient solution supply system. Once the nutrient solution in each layer of hollow extension rack 3 is replenished, the piston disc 6 is driven upward into slide cylinder 9 by drive device and wall climbing mechanism 7. When piston disc 6 comes into contact with annular blocking member 91, piston disc 6 can push the nutrient solution in column 1 back into temporary storage tank 5. Finally, it is discharged into nutrient solution recovery system through outlet 52 to realize the recovery of excess nutrient solution.

[0071] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A high-density hydroponics device for vegetables, comprising a column (1), an annular shell base (2), and a hollow extension frame (3), characterized in that: The column (1) is arranged vertically, and a number of annular shell seats (2) are fitted on the outer wall of the column (1) from top to bottom. The bottommost annular shell seat (2) is fixed to the column (1), and the remaining annular shell seats (2) are all limited and slidably installed on the column (1). A second traction steel wire rope (45) is connected between two adjacent annular shell seats (2). Several hollow extension frames (3) are connected to each of the annular shells (2) on their periphery, and several cultivation tubes (31) are respectively provided on each hollow extension frame (3). The column (1) is provided with a traction mechanism (4) near its top on its periphery. The traction mechanism (4) includes a U-shaped seat (41), a winding wheel (42), a first drive motor (43) and a first traction wire rope (44). The U-shaped seat (41) is fixed on the outer wall of the column (1), and the winding wheel (42) is rotatably mounted on the U-shaped seat (41); The first drive motor (43) is fixed on the side of the U-shaped seat (41), and its output shaft is fixedly connected to the shaft end of the winding and unwinding wheel (42); One end of the first traction wire rope (44) is wound on the unwinding wheel (42), and the other end is fixed to the uppermost annular shell seat (2).

2. The high-density soilless cultivation device for vegetables according to claim 1, characterized in that: The outer wall of the column (1) is provided with several groups of holes at equal intervals from top to bottom. Each group of holes is formed by several replenishment holes (11) distributed at equal intervals around the axis of the column (1). Each of the annular shells (2) has a number of liquid inlet holes (21) on its inner edge wall. The number and position of the liquid inlet holes (21) correspond one-to-one with the liquid replenishment holes (11). The top of the column (1) is connected to a temporary storage tank (5); The column (1) is a hollow structure with an opening at the top, and a liquid replenishment module is provided inside the column (1).

3. The high-density soilless cultivation device for vegetables according to claim 2, characterized in that: The liquid replenishment module includes a piston disc (6), a wall-climbing mechanism (7), a stirring mechanism (8), and a drive device; The piston disc (6) is slidably installed inside the column (1). The climbing mechanism (7) and the driving device are located at the bottom of the piston disc (6). The two work together to drive the piston disc (6) to adjust its height. The stirring mechanism (8) is located on the top of the piston disc (6), and the stirring mechanism (8) is linked with the driving device.

4. The high-density soilless cultivation device for vegetables according to claim 2, characterized in that: The annular housing (2) has vertically extending grooves (22) on its side wall corresponding to the positions of each liquid inlet hole (21). Each of the slide grooves (22) is vertically fixed with a slide rod (23), and each of the slide rods (23) is slidably fitted with a buoyancy block (24), and the buoyancy block (24) is slidably attached to the inner wall of the slide groove (22); When the buoyancy block (24) floats to its limit position, it can block the liquid inlet hole (21).

5. The high-density soilless cultivation device for vegetables according to claim 3, characterized in that: The wall-climbing mechanism (7) includes a bracket (71), a shaft (72), and wall-mounted wheels (73). A pair of brackets (71) are symmetrically fixed on the lower surface of the piston disc (6), and a shaft (72) is rotatably mounted on each of the two brackets (71). Both ends of the shaft (72) are fixedly fitted with wall-mounted wheels (73), and the outer edge of the wall-mounted wheels (73) is tightly fitted with the inner wall of the column (1); Worm gears (75) are fixedly mounted on both shafts (72); Two bidirectional worm gears (74) are mounted on the two brackets (71) and rotate together via the mounting brackets. The two sides of the bidirectional worm gears (74) are respectively meshed with two worm wheels (75). The bidirectional worm gear (74) is connected to the drive device via a bevel gear set.

6. The high-density soilless cultivation device for vegetables according to claim 5, characterized in that: The drive unit includes a connecting shaft (84), a driven gear (85), a second drive motor (86), and a main gear (87). The second drive motor (86) is fixed below the piston disc (6) by a mounting bracket, and the main gear (87) is fixed on the output shaft of the second drive motor (86); The connecting shaft (84) is rotatably mounted on the bottom of the piston disc (6); The driven gear (85) is fixedly mounted on the connecting shaft (84) and meshes with the main gear (87); The bevel gear set includes a second bevel gear (77) fixed to the bottom end of the connecting shaft (84) and a first bevel gear (76) fixed to the bidirectional worm (74). The first bevel gear (76) meshes with the second bevel gear (77).

7. The high-density soilless cultivation device for vegetables according to claim 6, characterized in that: The stirring mechanism (8) includes a main shaft (81), a stirring rod (82), and a stirring blade (83). The main shaft (81) is rotatably mounted on the top surface of the piston disc (6), and the main shaft (81) is coaxially fixedly connected to the connecting shaft (84); The main shaft (81) is evenly distributed with a plurality of stirring rods (82). A plurality of agitator blades (83) are evenly distributed on the main shaft (81) and near the upper surface of the piston disk (6).

8. The high-density soilless cultivation device for vegetables according to claim 3, characterized in that: The temporary storage tank (5) has a liquid inlet (51) on its side near its top, and the liquid inlet (51) is connected to the nutrient solution supply system through a pipe; The temporary storage tank (5) has a drain port (52) near its bottom on the side, and the drain port (52) is connected to the nutrient solution recovery system through a pipe.

9. A high-density soilless cultivation device for vegetables according to claim 8, characterized in that: A sliding cylinder (9) is fixed on the bottom wall of the temporary storage tank (5). The sliding cylinder (9) is coaxial with the column (1) and the two have the same inner diameter. The slide (9) has several through outlets (901) evenly distributed on it. An annular stopper (91) is fixed on the inner wall of the slide (9) near its top. The inner diameter of the annular stopper (91) is smaller than the diameter of the piston disc (6).

10. A high-density soilless cultivation device for vegetables according to claim 2, characterized in that: The column (1) has a vertically extending limiting groove (12) on its outer wall, and a limiting block (13) is fixed on the inner edge wall of each of the annular shell seats (2) except for the bottom one. The limiting blocks (13) are all slidably mounted in the limiting grooves (12).

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