A vertical hydroponic rack system suitable for urban agriculture

Abstract

The application discloses a vertical water culture frame system suitable for urban agriculture, which comprises a frame structure, a transmission device installed through the frame structure, and a plurality of self-vertical planting devices installed through the transmission device. The self-vertical planting devices rotate in the frame structure under the driving of the transmission device. In the rotating process, nutrient solution stored in the frame structure enters the self-vertical planting devices. With the rotation of the self-vertical planting devices, the nutrient solution in the upper self-vertical planting devices drips into the self-vertical planting devices located in the lower layer. The device can fully utilize the vertical height, improve the planting quantity, save the complicated circulating pipeline, be easier to maintain, and ensure sufficient illumination.

Description

Technical Field

[0001] This invention relates to a vertical hydroponic system suitable for urban agriculture. Background Technology

[0002] With the acceleration of global urbanization and the continuous rise in the proportion of urban population, traditional agriculture faces multiple challenges, including scarce land resources, water shortages, and high transportation costs. Vertical hydroponics, as an innovative agricultural solution, can achieve efficient crop production within limited urban spaces and has received widespread attention in recent years.

[0003] Vertical hydroponics systems significantly improve land utilization per unit area by cultivating plants in a vertically arranged structure. Compared to traditional soil cultivation, hydroponics offers significant advantages such as water conservation (saving up to 70% of water usage), high efficiency (50% higher fertilizer utilization), no seasonal limitations, and reduced pests and diseases. This system is particularly suitable for urban environments with limited space, such as rooftops, balconies, basements, or specialized vertical farms.

[0004] Existing hydroponic systems typically involve planting in a fixed location, which has the following drawbacks: It requires the construction of a complex water circulation system, and the pipes are prone to clogging and difficult to clean.

[0005] Insufficient light means that the lower hydroponic plants are blocked from receiving light.

[0006] Harvesting is inconvenient because the upper hydroponic plants are quite tall after planting, making harvesting difficult.

[0007] Based on the above issues, we designed a vertical hydroponic system suitable for urban agriculture that can fully utilize vertical height, increase planting capacity, eliminate complex circulation pipes, simplify maintenance, and provide ample sunlight. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a vertical hydroponic system suitable for urban agriculture that can make full use of vertical height, increase the planting quantity, eliminate complex circulation pipelines, be easier to maintain, and provide sufficient light.

[0009] To solve the above problems, the present invention adopts the following technical solution: A vertical hydroponic system suitable for urban agriculture includes a frame structure and a transmission device installed through the frame structure. Multiple self-hanging planting devices are installed through the transmission device. The self-hanging planting devices rotate within the frame structure under the drive of the transmission device. During the rotation, nutrient solution stored in the frame structure enters the self-hanging planting device. As the self-hanging planting devices rotate, the nutrient solution in the upper self-hanging planting devices drips into the self-hanging planting devices located in the lower layers.

[0010] Preferably, the frame structure includes a box body, a bottom frame, support columns, an upper frame, and a top cover. Brackets are welded to the four corners of the bottom of the box body. Four support columns are provided and welded between the bottom frame and the upper frame. The bottom frame is fixed to the top of the box body, which has an open top. The top cover covers the top of the upper frame. A side plate is fixed between two support columns on the same side. A water inlet pipe and an overflow pipe are installed on the side of the box body, with the height of the water inlet pipe exceeding the height of the overflow pipe. The transmission device is installed through the bottom frame and the upper frame. The self-diving planting device sinks into the box body under the drive of the transmission device.

[0011] Preferably, an operating opening is formed between the side plates on both sides, and two guide rails are arranged parallel to each other in the front and rear inside the upper frame, with a water curtain installed between the two guide rails.

[0012] Preferably, the transmission device includes a main drive shaft, a drive motor, a secondary drive shaft, a driven shaft, a synchronous pulley, and a synchronous belt. Two bearing seats are installed at the bottom of the housing. The main drive shaft is installed between the two bearing seats, and a bearing is fitted between the main drive shaft and the bearing seats. The drive motor is installed at the bottom of the housing, and gear transmission occurs between the drive motor and the main drive shaft. Two secondary drive shafts are coaxially arranged on the left and right sides. Each secondary drive shaft passes through the bottom frame and is fitted with a bearing and a shaft seal. The shaft seal seals the inside of the bearing. Chain transmission occurs between the two ends of the main drive shaft and the two secondary drive shafts on either side. The driven shaft is located on the left... The passive shaft is symmetrically arranged on both sides of the upper frame and also installed on both sides of the lower frame. The passive shaft is fitted with a first bearing and a first shaft seal between itself and the upper and lower frames, respectively. The first shaft seal seals the inner side of the first bearing. The synchronous pulley is installed on the inner end of the secondary drive shaft and the passive shaft. The synchronous belt is installed between multiple synchronous pulleys on the same side. A protruding part is provided on the outer surface of the synchronous belt, and the protruding part protrudes to the outer side of the synchronous pulley. A hanging shaft is installed between two synchronous belts, and a second bearing is fitted between the hanging shaft and the protruding part. The self-hanging planting device is rotatably installed through the hanging shaft.

[0013] Preferably, the self-hanging planting device includes a planting trough and a hanger. The bottom of the planting trough is V-shaped, and a partition is fixedly installed inside the planting trough. Insertion holes are evenly distributed on the surface of the partition, and planting cups are detachably installed in the insertion holes. The hanger is installed on the top of the planting trough, and there are two or more hangers. A shaft tube is provided on the top of the hanger, and the hanging shaft passes through the shaft tube. A third bearing is fitted between the hanging shaft and the shaft tube. Water inlets are provided at the front and rear ends of the planting trough. When the planting trough moves to the lowest position with the synchronous belt, the planting trough enters the housing. At this time, the upper edge of the planting trough is higher than the height of the overflow pipe, and the height of the water inlet is lower than the height of the overflow pipe. An inner overflow pipe is provided at the bottom of the planting trough, and the upper edge of the inner overflow pipe is lower than the height of the water inlet.

[0014] Preferably, an elastic retaining ring is embedded in the wall of the insertion hole, and a cup rim is injection molded on the upper outer wall of the planting cup. The planting cup is inserted into the elastic retaining ring, and the cup rim is located at the upper part of the insertion hole. Water permeable holes are evenly distributed on the cup body of the planting cup, and the height of some water permeable holes is lower than the upper edge height of the overflow pipe.

[0015] Preferably, the bottom chamfer of the cup rim forms a hand-cranked conical surface.

[0016] Preferably, a water distribution tray is provided below the planting trough. The inner bottom of the water distribution tray is provided with multiple connecting seats, and a conduit is threadedly connected to the connecting seats. A water outlet is provided on the outer wall of the conduit. The upper end of the conduit passes upward through the inner overflow pipe and is fitted with a limit cap. A water inlet groove is machined on the conduit near the limit cap. Multiple notches are provided in a ring at the upper end of the inner overflow pipe. When the water distribution tray hangs down under the action of gravity, the limit cap acts on the top of the inner overflow pipe. At this time, excess water in the planting trough flows into the water inlet groove through the notches and enters the water distribution tray through the water outlet. Drip holes are evenly distributed on the surface of the water distribution tray. The height of the notches is higher than the height of the permeable holes in the lower layer.

[0017] Preferably, the water inlet hole is conical, and its radial direction gradually narrows towards the interior of the planting trough.

[0018] Preferably, a light-transmitting plate is provided on the top of the top cover.

[0019] The beneficial effects of this invention are: One advantage is that this device can achieve vertical and horizontal displacement, enabling three-dimensional planting, making full use of vertical space, and increasing the planting volume.

[0020] Secondly, the self-hanging planting device can scoop up nutrient water while descending, thus replenishing the water supply. This eliminates the need for complex sprinkler irrigation circulation pipelines, making the setup simpler and more efficient.

[0021] Thirdly, the cyclical displacement of the self-hanging planting device allows hydroponic plants to receive uniform light.

[0022] Fourthly, the self-hanging planting device can achieve drip irrigation during the circulation process, supplementing the irrigation of the self-hanging planting device below. This is especially effective for hydroponic plants whose root systems have not yet developed, thus improving the survival rate.

[0023] Fifthly, due to the use of top drip irrigation, the water level in the planting trough is relatively low, reducing the load on the equipment.

[0024] Sixth advantage: This device has a simple structure and high integrity, making it suitable for widespread use. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a diagram showing the water curtain when it is open. Figure 3 This is a schematic diagram of the internal structure of the device; Figure 4 A schematic diagram showing the connection between the frame structure and the transmission device; Figure 5 This is a schematic diagram of the installation of a self-hanging planting device; Figure 6 for Figure 5 Enlarged view at point A; Figure 7 This is a cross-sectional view of a self-hanging planting device; Figure 8 for Figure 7 Enlarged view at point B. Detailed Implementation

[0027] All features disclosed in this specification, or steps in all methods or processes disclosed herein, may be combined in any way, except for mutually exclusive features and / or steps.

[0028] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0029] In the description of this invention, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0030] Furthermore, in the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this invention, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0032] See Figure 1 , Figure 2 and Figure 3 The vertical hydroponic system for urban agriculture shown includes a frame structure 1 and a transmission device 2 installed through the frame structure 1. Self-hanging planting devices 3 are installed through the transmission device 2. Multiple self-hanging planting devices 3 are provided. The self-hanging planting devices 3 rotate within the frame structure 1 under the drive of the transmission device 2. During the rotation, the nutrient solution stored in the frame structure 1 enters the self-hanging planting device 3. As the self-hanging planting device 3 rotates, the nutrient solution in the upper self-hanging planting device 3 drips into the self-hanging planting device 3 located in the lower layer.

[0033] In the above technical solution, by making full use of vertical height, multiple self-hanging planting devices 3 can be arranged to achieve three-dimensional planting.

[0034] The transmission device 2 drives the self-hanging planting device 3 to rotate. During the rotation, the lower self-hanging planting device 3 will scoop up the nutrient water located at the bottom of the frame structure 1, thus replenishing the water for the self-hanging planting device 3.

[0035] This technical solution eliminates the need for the complex construction of a sprinkler irrigation system.

[0036] See Figure 1 and Figure 4 As shown, the frame structure 1 includes a box body 101, a bottom frame 102, support columns 1333, an upper frame 103, and a top cover 104. Supports 105 are welded to the four corners of the bottom of the box body 101. Four support columns 1333 are provided and welded between the bottom frame 102 and the upper frame 103. The bottom frame 102 is fixed to the top of the box body 101. The top of the box body 101 is an open structure. The top cover 104 covers the top of the upper frame 103. A side plate 106 is fixed between two support columns 1333 on the same side. A water inlet pipe 109 and an overflow pipe 110 are installed on the side of the box body 101. The height of the water inlet pipe 109 is higher than the height of the overflow pipe 110. The transmission device 2 is installed through the bottom frame 102 and the upper frame 103. The self-hanging planting device 3, driven by the transmission device 2, sinks into the box body 101.

[0037] In the above technical solution, the box 101 is used to store nutrient water, which is a mixture of water and nutrient solution. The nutrient water is adjusted according to the type of hydroponic plant and the missing nutrients. It is transported to the box 101 through the pipeline and then through the water inlet pipe 109. Excess nutrient water overflows through the overflow pipe 110 and flows back to ensure that the water level in the box 101 always reaches the position of the overflow pipe 110.

[0038] By installing the side plate 106, water leakage from both sides can be reduced during the circulation of the self-hanging planting device 3, ensuring the safe operation of the transmission device 2.

[0039] See Figure 1 and Figure 4 As shown, an operating opening is formed between the side plates 106 on both sides, and two guide rails 107 are arranged parallel to each other in front and behind inside the upper frame 103, with a water curtain 108 installed between the two guide rails 107.

[0040] In the above technical solution, according to the humidity requirements of hydroponic plants, after the water curtain 108 is closed, the water dripping from the self-hanging planting device 3 will increase the internal air humidity of the device.

[0041] See Figure 4 , Figure 5 and Figure 6 As shown, the transmission device 2 includes a main drive shaft 21, a drive motor 22, a secondary drive shaft 23, a driven shaft 24, a synchronous pulley 25, and a synchronous belt 26. Two bearing seats 121 are installed at the bottom of the housing 101. The main drive shaft 21 is installed between the two bearing seats 121, and bearings are fitted between the main drive shaft 21 and the bearing seats 121. The drive motor 22 is installed at the bottom of the housing 101, and gear transmission occurs between the drive motor 22 and the main drive shaft 21. Two secondary drive shafts 23 are coaxially arranged on the left and right sides. Each secondary drive shaft 23 passes through the bottom frame 102 and is fitted with a bearing and a shaft seal. The shaft seal seals the inside of the bearing. Chain transmission occurs between the two ends of the main drive shaft 21 and the two secondary drive shafts 23 on either side. The driven shaft 24... The passive shaft 24 is also installed on both sides of the bottom frame 102, symmetrically arranged on both sides of the upper frame 103. The passive shaft 24 is fitted with a first bearing and a first shaft seal between the upper frame 103 and the bottom frame 102, respectively. The first shaft seal seals the inner side of the first bearing. The synchronous pulley 25 is installed at the inner end of the secondary drive shaft 23 and the passive shaft 24. The synchronous belt 26 is installed between multiple synchronous pulleys 25 on the same side. A protruding part 261 is provided on the outer surface of the synchronous belt 26, and the protruding part 261 protrudes to the outer side of the synchronous pulley 25. A hanging shaft 262 is installed between two synchronous belts 26. A second bearing is fitted between the hanging shaft 262 and the protruding part 261. The self-hanging planting device 3 is rotatably installed through the hanging shaft 262.

[0042] In the above technical solution, by setting four synchronous pulleys 25 on one side, the self-hanging planting device 3 can not only run vertically, but also horizontally during operation.

[0043] When the self-hanging planting device 3 is running horizontally at the top, it can increase the light exposure time of the plants. When the self-hanging planting device 3 is running horizontally at the bottom, it can move horizontally within the box 101, allowing the nutrient solution in the box 101 to enter the self-hanging planting device 3.

[0044] In the above technical solution, the transmission ratio between the drive motor 22 and the main drive shaft 21 is N:1, where N = 6~20. That is, the drive motor 22 drives the driving gear to rotate N times, and the driven gear on the main drive shaft 21 rotates 1 time.

[0045] In the above technical solution, a second bearing is used to support the hanging shaft 262 and the protruding part 261, so that the hanging shaft 262 can rotate, which facilitates the hanging of the self-hanging planting device 3.

[0046] In the above technical solution, the height of the overflow pipe 110 is lower than the height of the synchronous belt 26 to prevent the synchronous belt 26 from being immersed in water.

[0047] See Figure 6 , Figure 7 and Figure 8 As shown, the self-hanging planting device 3 includes a planting trough 31 and a hanger 32. The bottom of the planting trough 31 is V-shaped. A partition 33 is fixedly installed inside the planting trough 31. Insertion holes 34 are evenly distributed on the surface of the partition 33. Planting cups 35 are detachably installed in the insertion holes 34. The hanger 32 is installed on the top of the planting trough 31. There are two or more hangers 32. A shaft tube 36 is provided on the top of the hanger 32. The hanging shaft 262 passes through the shaft tube 36. The hanging shaft 262 and the shaft tube 36 are connected. With the aid of a third bearing, water inlet holes 37 are provided at the front and rear end faces of the planting trough 31. When the planting trough 31 moves to the lowest position with the synchronous belt 26, the planting trough 31 enters the box 101, and at this time the upper edge of the planting trough 31 is higher than the height of the overflow pipe 110, and the height of the water inlet hole 37 is lower than the height of the overflow pipe 110. An inner overflow pipe 38 is provided at the inner bottom of the planting trough 31, and the upper edge of the inner overflow pipe 38 is lower than the height of the water inlet hole 37.

[0048] In the above technical solution, the planting trough 31 with a V-shaped bottom design makes the weight of the middle part of the planting trough 31 greater than the weight of the front and rear ends after water is added, so that the planting trough 31 can maintain horizontal operation.

[0049] As the planting trough 31 moves horizontally along the box 101 driven by the synchronous belt 26, the nutrient solution in the box 101 enters the planting trough 31 through the water inlet 37, thus completing the water replenishment of the planting trough 31.

[0050] After the planting trough 31 is detached from the box 101, the planting trough 31 moves vertically under the drive of the synchronous belt 26. At this time, the excess water in the planting trough 31 will overflow from the inner overflow pipe 38 into the planting trough 31 below, completing secondary irrigation. This is especially useful for hydroponic plants with underdeveloped root systems, where the roots of these plants may not be able to reach the water level in the planting trough 31. Irrigation can be completed by conveying the water downwards, ensuring that the plants can fully absorb water.

[0051] See Figure 8As shown, an elastic retaining ring 341 is embedded in the wall of the insertion hole 34, and a cup rim 351 is injection molded on the upper outer wall of the planting cup 35. The planting cup 35 is inserted into the elastic retaining ring 341, and the cup rim 351 is located at the upper part of the insertion hole 34. Water permeable holes 355 are evenly distributed on the cup body of the planting cup 35, and the height of some water permeable holes 355 is lower than the height of the upper edge of the overflow pipe 110.

[0052] The main purpose of this technical solution is to fix the position of the planting cup 35.

[0053] See Figure 8 As shown, the bottom chamfer of the cup rim 351 forms a hand-cut conical surface 352.

[0054] The conical surface 352 allows for easy application of force to the rim 351 of the cup, making it convenient to pull the planting cup 35 upwards.

[0055] See Figure 7 and Figure 8 As shown, a water distribution tray 331 is provided below the planting trough 31. The inner bottom of the water distribution tray 331 is provided with multiple connecting seats 332. A conduit 333 is threadedly connected to the connecting seats 332. A water outlet 334 is provided on the outer wall of the conduit 333. The upper end of the conduit 333 passes upward through the inner overflow pipe 38 and engages with a limiting cap 335. A water inlet groove 336 is machined into the conduit 333 near the limiting cap 335. The upper end of the inner overflow pipe 38 is ring-shaped. The water distribution tray 331 is provided with multiple notches and grooves 337. When the water distribution tray 331 hangs down under the action of gravity, the limiting cap 335 acts on the top of the inner overflow pipe 38. At this time, the excess water in the planting trough 31 flows into the water inlet trough 336 through the notches and grooves 337, and enters the water distribution tray 331 through the water outlet 334. Drip holes 338 are evenly distributed on the surface of the water distribution tray 331. The height of the notches and grooves 337 is higher than the height of the permeable holes 355 in the lower layer.

[0056] In the above technical solution, the water distribution tray 331 plays the role of water distribution. Excess water overflowing through the inner overflow pipe 38 is collected by the water distribution tray 331 and distributed through the drip hole 338, so that the water can drip down evenly and effectively irrigate the plants below.

[0057] See Figure 7 and Figure 8 As shown, the water inlet 37 is conical, and its diameter gradually decreases towards the interior of the planting trough 31.

[0058] This technical solution allows water in the box 101 to enter the planting trough 31 more smoothly during the horizontal movement of the planting trough 31.

[0059] See Figure 1 As shown, a light-transmitting plate 144 is provided on the top of the top cover 104.

[0060] The light-transmitting plate 144 facilitates light transmission for light-loving plants.

[0061] 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 illustrative of the 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 present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A vertical hydroponic system suitable for urban agriculture, characterized in that: The system includes a frame structure (1) and a transmission device (2) installed through the frame structure (1). A self-hanging planting device (3) is installed through the transmission device (2). Multiple self-hanging planting devices (3) are provided. Driven by the transmission device (2), each self-hanging planting device (3) rotates within the frame structure (1). During rotation, nutrient solution stored within the frame structure (1) enters the self-hanging planting device (3). As the self-hanging planting device (3) rotates, the upper self-hanging planting device... The nutrient solution in the container (3) drips into the self-hanging planting device (3) located in the lower layer. The frame structure (1) includes a box (101), and an inlet pipe (109) and an overflow pipe (110) are installed on the side of the box (101). The transmission device (2) includes a main drive shaft (21), a drive motor (22), a secondary drive shaft (23), a driven shaft (24), a synchronous pulley (25), and a synchronous belt (26). A hanging shaft (262) is installed between the two synchronous belts (26). The self-hanging planting device (3) The system includes a planting trough (31) and a hanger (32). The bottom of the planting trough (31) is V-shaped. A partition (33) is fixedly installed inside the planting trough (31). Insertion holes (34) are evenly distributed on the surface of the partition (33). Planting cups (35) are detachably installed in the insertion holes (34). The hanger (32) is installed on the top of the planting trough (31). There are two or more hangers (32). A shaft tube (36) is provided on the top of the hanger (32). The hanging shaft (262) passes through the top of the hanging trough (31). A shaft tube (36) is provided with a third bearing between the hanging shaft (262) and the shaft tube (36). Water inlet holes (37) are provided at the front and rear ends of the planting trough (31). When the planting trough (31) moves to the lowest position with the synchronous belt (26), the planting trough (31) enters the box (101). At this time, the height of the upper edge of the planting trough (31) is higher than the height of the overflow pipe (110), and the height of the water inlet hole (37) is lower than the height of the overflow pipe (110).An inner overflow pipe (38) is provided at the bottom of the planting trough (31). The upper edge of the inner overflow pipe (38) is lower than the height of the water inlet (37). Water permeable holes (355) are evenly distributed on the body of the planting cup (35). The height of some water permeable holes (355) is lower than the upper edge of the overflow pipe (110). A water distribution tray (331) is provided below the planting trough (31). The inner bottom of the water distribution tray (331) is provided with multiple connecting seats (332). A conduit (333) is threadedly connected to the connecting seats (332). A water outlet (334) is provided on the outer wall of the conduit (333). The upper end of the conduit (333) passes through the inner overflow pipe (38) and is fitted with a limit cap. (335), the conduit (333) has a water inlet groove (336) near the limiting cap (335), and the upper end of the inner overflow pipe (38) is provided with multiple notches (337). When the water distribution tray (331) hangs down under the action of gravity, the limiting cap (335) acts on the top of the inner overflow pipe (38). At this time, the excess water in the planting trough (31) flows into the water inlet groove (336) through the notches (337) and enters the water distribution tray (331) through the water outlet (334). Drip holes (338) are evenly distributed on the surface of the water distribution tray (331); the height of the notches (337) is higher than the height of the permeable holes (355) in the lower layer.

2. The vertical hydroponic system for urban agriculture according to claim 1, characterized in that: The frame structure (1) further includes a bottom frame (102), pillars (1333), an upper frame (103), and a top cover (104). Brackets (105) are welded to the four corners of the bottom of the box (101). Four pillars (1333) are provided, welded between the bottom frame (102) and the upper frame (103). The bottom frame (102) is fixed to the top of the box (101). The top of the box (101)... The top cover (104) is an open structure covering the top of the upper frame (103); a side plate (106) is fixed between the two pillars (1333) on the same side; the height of the water inlet pipe (109) is higher than the height of the overflow pipe (110); the transmission device (2) is installed through the bottom frame (102) and the upper frame (103); the self-hanging planting device (3) sinks into the box (101) under the drive of the transmission device (2).

3. The vertical hydroponic system for urban agriculture according to claim 2, characterized in that: An operating opening is formed between the side plates (106) on both sides. Two guide rails (107) are arranged parallel to each other in front and behind inside the upper frame (103). A water curtain (108) is installed between the two guide rails (107).

4. The vertical hydroponic system for urban agriculture according to claim 2, characterized in that: Two bearing seats (121) are installed at the bottom of the housing (101). The main drive shaft (21) is installed between the bearing seats (121) on both sides. A bearing is fitted between the main drive shaft (21) and the bearing seat (121). The drive motor (22) is installed at the bottom of the housing (101). The drive motor (22) and the main drive shaft (21) are connected by gear transmission. Two secondary drive shafts (23) are coaxially arranged on the left and right sides. The secondary drive shafts (23) pass through the bottom frame (102) and are fitted with a bearing and a shaft seal. The shaft seal is sealed inside the bearing. The two ends of the main drive shaft (21) are connected to the secondary drive shafts (23) on both sides by chain transmission. The passive shafts (24) are symmetrically arranged on both sides of the upper frame (103). The passive shaft (24) is also installed on both sides of the bottom frame (102). The passive shaft (24) is fitted with the upper frame (103) and the bottom frame (102) respectively with a first bearing and a first shaft seal. The first shaft seal is sealed inside the first bearing. The synchronous pulley (25) is installed at the inner end of the secondary transmission shaft (23) and the passive shaft (24). The synchronous belt (26) is installed between multiple synchronous pulleys (25) on the same side. A protruding part (261) is provided on the outer surface of the synchronous belt (26). The protruding part (261) protrudes to the outside of the synchronous pulley (25). A hanging shaft (262) is installed between two synchronous belts (26). A second bearing is fitted between the hanging shaft (262) and the protruding part (261). The self-hanging planting device (3) is rotatably installed through the hanging shaft (262).

5. The vertical hydroponic system for urban agriculture according to claim 1, characterized in that: An elastic retaining ring (341) is embedded in the wall of the insertion hole (34), and a cup rim (351) is formed by injection molding on the upper outer wall of the planting cup (35). The planting cup (35) is inserted into the elastic retaining ring (341), and the cup rim (351) is located at the upper part of the insertion hole (34).

6. The vertical hydroponic system for urban agriculture according to claim 5, characterized in that: The bottom chamfer of the cup rim (351) forms a hand-cut conical surface (352).

7. The vertical hydroponic system for urban agriculture according to claim 1, characterized in that: The water inlet (37) is conical, and its diameter gradually decreases towards the interior of the planting trough (31).

8. The vertical hydroponic system for urban agriculture according to claim 2, characterized in that: A light-transmitting plate (144) is provided on the top of the top cover (104).

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