A tray return system

Abstract

The utility model discloses a kind of seedling tray backshaped conveying systems, belong to seedling tray conveying technical field.The utility model includes the first conveying line, second conveying line, third conveying line and fourth conveying line of rectangular distribution, second conveying line, fourth conveying line are divided into first area and second area;Wherein, first area is equipped with several first roller that is transversely distributed, second area is equipped with several second roller that is longitudinally distributed;While, two areas are equipped with chain type reversing conveying mechanism;And the chain type reversing conveying mechanism is connected with lifting assembly.The utility model passes through the cooperation of first roller, second roller and reversing conveying mechanism, can realize the flexible switching of seedling tray between first conveying line, third conveying line, and then realize the continuous operation of seedling tray circulation, not only beneficial to save the occupied space of entire conveying system in length direction, also beneficial to improve work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of seedling tray conveying technology, and more specifically, relates to a seedling tray loop conveying system. Background Technology

[0002] Traditional farming methods are limited by land resources, which severely hinders the development of animal husbandry. In particular, some regions face problems such as scarce land resources, limited areas suitable for growing pasture, and climatic constraints, resulting in a significant gap in the stable supply of high-quality feed throughout the year.

[0003] Hydroponics, as a special cultivation method for forage grasses, is not limited by land resources. It can utilize non-arable land space to significantly increase yield per unit area through vertical planting, thus saving arable land. At the same time, its growth cycle is controllable and significantly shortened, enabling batch-based continuous production and stable year-round supply, solving the seasonal and climatic constraints of traditional planting. For example, patents CN113273485A, CN114831010A, and CN118556600A all disclose technical improvements related to hydroponics forage grasses.

[0004] In hydroponic forage production systems, conveyor lines are typically used to transport seedling trays between different workstations. Traditional conveyor lines generally employ a single, linear transmission mode, making it difficult to form a complete closed loop for the seedling trays. This design has two significant drawbacks: firstly, linear transmission restricts work efficiency, preventing continuous operation through cyclical flow; secondly, linear layouts often require more linear space, increasing the demand for floor space and hindering efficient space utilization.

[0005] A search revealed a seedling tray conveyor line in patent CN106586519A. This application uses two opposing belt conveyors to transport the seedling trays, and a robotic arm to transfer the trays between the two conveyor lines. However, the industry still needs more diverse and sophisticated designs to achieve continuous operation of seedling tray circulation. Utility Model Content

[0006] 1. The problem to be solved In view of at least some of the problems existing in the prior art, this utility model proposes a seedling tray loop conveying system, which aims to solve the problem that the traditional conveying system adopts a single linear transmission mode, which easily occupies a large space and is not conducive to improving work efficiency.

[0007] 2. Technical Solution To solve the above problems, the technical solution adopted by this utility model is as follows: This utility model discloses a seedling tray U-shaped conveying system, which includes a first conveying line, a second conveying line, a third conveying line, and a fourth conveying line arranged in a rectangular pattern. The fourth conveyor line includes an installation frame, which is divided into a first region and a second region along its length. The first region is provided with a plurality of first rollers arranged laterally, and the first region is provided with a first inlet channel near the third conveyor line; The second region is provided with a plurality of second rollers arranged longitudinally, and the second region is provided with a first outlet channel near the first conveyor line; The mounting frame is equipped with a reversing conveyor mechanism at the bottom of the inlet and first outlet channel areas. The reversing conveyor mechanism includes a housing, within which are a driving sprocket, a driven sprocket, and a conveyor chain connecting the two sprockets. The drive sprocket is connected to a drive source, and the housing is located between two adjacent first rollers or second rollers and is connected to a lifting assembly.

[0008] In some embodiments, the third conveyor line is divided into two segments by a transplanting roller line, the transplanting roller line including the first transplanting roller line; The first transplanting roller line is provided with a second inlet channel at the junction of the first transplanting roller line and the third conveyor line, and the first transplanting roller line is provided with a reversing conveyor mechanism in the area of ​​the second inlet channel; wherein, the conveying direction of the reversing conveyor mechanism is consistent with the conveying direction of the third conveyor line and perpendicular to the conveying direction of the first transplanting roller line.

[0009] In some embodiments, the transplanting roller line further includes a second transplanting roller line; The second transplanting roller line is provided with a second outlet channel at the junction of the second transplanting roller line and the third conveyor line, and the second transplanting roller line is provided with a reversing conveyor mechanism in the area of ​​the second outlet channel; wherein, the conveying direction of the reversing conveyor mechanism is consistent with the conveying direction of the third conveyor line and perpendicular to the conveying direction of the second transplanting roller line.

[0010] In some embodiments, a cleaning machine is provided between the first conveyor line and the fourth conveyor line; wherein the first outlet channel is connected to the inlet of the cleaning machine.

[0011] In some embodiments, a sensing mechanism is provided on the first conveyor line and / or the third conveyor line; the sensing mechanism includes a mounting base and a swing plate rotatably mounted on the mounting base; wherein... The first end of the swing plate is connected to a sensing block, and the mounting base is provided with a sensing probe that cooperates with the sensing block. Under normal conditions, due to gravity, the first end is in a downward state, causing the sensing block and the sensing probe to approach or contact each other, and the signal is connected; when the second end of the swing plate is subjected to external force, it forces the first end to rise, causing the sensing block to move away from the sensing probe, and the signal is disconnected.

[0012] In some embodiments, the mounting base is a hollow frame structure, and the swing plate is hinged to the mounting base by a pin, and the pin is equipped with a cotter pin. The first end extends into the inner cavity of the mounting base through an opening on the mounting base; the sensing end of the sensing probe is located in the inner cavity of the mounting base.

[0013] In some embodiments, the sensing probe is disposed on the side plate of the mounting base, and the sensing block is disposed on the side of the first end.

[0014] In some embodiments, the sensing probe is mounted on the base plate of the mounting base, and the sensing block is mounted on the lower surface of the first end by adhesive bonding or screws.

[0015] In some embodiments, the sensing probe is a metal sensor and the sensing block is a metal block; or, the sensing probe is a Hall sensor and the sensing block is a permanent magnet.

[0016] In some embodiments, the first and third conveyor lines are belt conveyors; the mounting base is provided with lugs for connecting to the frame of the belt conveyor.

[0017] 3. Beneficial effects Compared with the prior art, the beneficial effects of this utility model are as follows: (1) The present invention provides a seedling tray conveying system with four rectangular conveying lines. The second and fourth conveying lines are divided into two areas. One area is provided with a first roller distributed horizontally, and the other area is provided with a second roller distributed vertically. Both areas are provided with a reversing conveying mechanism. Through the cooperation of the first roller, the second roller and the reversing conveying mechanism, the seedling tray can be flexibly switched between the first and third conveying lines, thereby realizing the continuous operation of the seedling tray circulation. This not only helps to save the space occupied by the entire conveying system in the length direction, but also helps to improve work efficiency.

[0018] (2) In the seedling tray conveying system of this utility model, the swing plate of the sensing mechanism is hinged to the mounting base, and the sensor is switched on and off by utilizing the gravity difference between the two ends of the swing plate. Compared with the traditional spring structure, it is not only simpler in structure, but also has a good service life.

[0019] (3) The seedling tray conveying system of this utility model adopts a metal sensor or a Hall sensor. Compared with the traditional photoelectric sensor, it has a stronger ability to resist external environmental interference and can be used in the watery and dusty environment of hydroponic forage production system, ensuring the sensitivity of the sensing effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a seedling tray spiral conveying system according to the present invention; Figure 2 This is a schematic diagram of the structure of the third conveyor line in this utility model; Figure 3 This is a schematic diagram of the reversing conveyor mechanism in this utility model; Figure 4 This is a schematic diagram of the transplanting roller line in this utility model; Figure 5 This is an enlarged schematic diagram of the layout at point A in this utility model; Figure 6 This is a schematic diagram of the sensing mechanism in this utility model; Figure 7 This is another structural schematic diagram of the sensing mechanism in this utility model; Figure 8 for Figure 7 A schematic diagram of the structure of the swing plate.

[0021] In the diagram: 100, first conveyor line; 200, second conveyor line; 300, third conveyor line; 400. Fourth conveyor line; 410. Mounting frame; 411. First zone; 412. Second zone; 413. First inlet channel; 414. First outlet channel; 420. First roller; 430. Second roller; 500. Reversing conveyor mechanism; 510. Housing; 520. Drive sprocket; 530. Driven sprocket; 540. Conveyor chain; 600. Transplanting roller conveyor; 610. First transplanting roller conveyor; 611. Second inlet channel; 620. Second transplanting roller conveyor; 621. Second outlet channel; 700. Washing machine; 800, Sensing mechanism; 810, Mounting base; 820, Swing plate; 821, First end; 822, Second end; 830, Sensing block; 840, Sensing probe; 850, Pin; 860, Cotter pin; 870, Lug; 900, Seedling tray. Detailed Implementation

[0022] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not 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 utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] The present invention will be further described below with reference to specific embodiments.

[0025] like Figure 1 As shown, a seedling tray conveying system according to this embodiment includes a first conveyor line 100, a second conveyor line 200, a third conveyor line 300, and a fourth conveyor line 400 arranged in a rectangular pattern. The first conveyor line 100 and the third conveyor line 300 are two parallel main conveyor lines, which can be belt conveyors as used in the prior art. Their specific structures are existing technologies and will not be described in detail here.

[0026] The second conveyor line 200 and the fourth conveyor line 400 are respectively used to connect the corresponding ends of the first conveyor line 100 and the third conveyor line 300 to complete the flexible switching of the seedling tray 900 between the first conveyor line 100 and the third conveyor line 300, thereby realizing the continuous operation of the seedling tray 900 in circulation. The second conveyor line 200 and the fourth conveyor line 400 have the same structure, both being roller conveyor lines, only their orientation differs. The structure and working principle of the fourth conveyor line 400 will be described in detail below as an example.

[0027] Specifically, refer to Figure 2 As shown, the fourth conveyor line 400 includes a mounting frame 410, which extends along its length (i.e., Figure 2 The region (in the X direction) can be divided into a first region 411 and a second region 412. Within the first region 411, several components are horizontally distributed (…). Figure 2 The first roller 420 (in the Y direction) has the same conveying direction as the third conveyor line 300. At the same time, a first inlet channel 413 is provided in the first area 411 near the third conveyor line 300 to ensure that the seedling trays 900 on the third conveyor line 300 can naturally transition into the first area 411.

[0028] The second area 412 contains several longitudinally distributed ( Figure 2The second roller 430 (in the X direction) is perpendicular to the conveying direction of the third conveyor line 300, and its height is slightly higher than that of the first roller 420. Meanwhile, a first outlet channel 414 is provided in the second region 412 near the first conveyor line 100 to facilitate the switching of the seedling tray 900 between the second region 412 and the first conveyor line 100.

[0029] Since the conveying directions of the seedling tray 900 in the first region 411 and the second region 412 are perpendicular to each other, in order to facilitate the stable transfer of the seedling tray 900 between the two regions, in this embodiment, multiple sets of reversing conveying mechanisms 500 are provided in the first region 411; wherein, the reversing conveying mechanism 500 is located entirely in the gap between two adjacent first rollers 420, and its conveying direction is consistent with the conveying direction of the second roller 430, for transferring the seedling tray 900 in the first region 411 to the second region 412.

[0030] refer to Figure 3 , Figure 4 As shown, the reversing conveyor mechanism 500 is a chain conveyor structure, which includes a housing 510. Inside the housing 510 are a driving sprocket 520, a driven sprocket 530, and a conveyor chain 540 connecting the driving and driven sprockets. The driving sprocket 520 is connected to a drive source for driving the conveyor chain 540 to rotate. The housing 510 is connected to a lifting assembly for lifting the housing 510. Both the drive source and the lifting assembly can utilize existing technology and are not specifically limited here.

[0031] Of course, in order to achieve stable transfer of the seedling tray 900 between the second area 412 and the first conveyor line 100, a reversing conveyor mechanism 500 also needs to be set in the area of ​​the first outlet channel 414; at this time, the conveying direction of the conveyor chain 540 is consistent with that of the first conveyor line 100.

[0032] Specifically, in this embodiment, three sets of reversing conveying mechanisms 500 are provided in the first region 411 and the second region 412. Meanwhile, the drive source is a motor, and the lifting assembly is an electric push rod.

[0033] In this embodiment, the reversing process of the seedling tray 900 on the fourth conveyor line 400 is as follows: After the seedling tray 900 on the third conveyor line 300 enters the first area 411 through the first inlet channel 413, the electric push rod is activated, driving the reversing conveyor mechanism 500 to move upward and lift the seedling tray 900 from the bottom; then, the motor is activated, driving the conveyor chain 540 to rotate and convey the seedling tray 900 on it to the second area 412. The seedling tray 900 is conveyed by the second roller 430 to the area where the first outlet channel 414 is located; then, the reversing conveyor mechanism 500 in the second area 412 transfers the seedling tray 900 to the first conveyor line 100.

[0034] This embodiment of a seedling tray circular conveying system, through the arrangement of four rectangularly distributed conveying lines and the cooperation of the first roller 420, the second roller 430 and the reversing conveying mechanism 500, enables the seedling tray 900 to flexibly switch between the first conveying line 100 and the third conveying line 300, thereby realizing the continuous operation of the seedling tray 900 in a circular flow. This not only helps to save the space occupied by the entire conveying system in the length direction, but also helps to improve work efficiency.

[0035] refer to Figure 1 , Figure 4 As shown, in some embodiments, the third conveyor line 300 is divided into two sections by a transplanting roller line 600, which includes a first transplanting roller line 610 and a second transplanting roller line 620. The first transplanting roller line 610 carries seedling trays 900 loaded with seeds from the third conveyor line 300, which are then transferred to a seedling tower by other transfer mechanisms, such as a robotic arm, for growth. The second transplanting roller line 620 carries seedling trays 900 loaded with mature forage, which are transferred from the seedling tower.

[0036] Specifically, a second inlet channel 611 is provided at the junction of the first transplanting roller conveyor 610 and the third conveyor line 300; a second outlet channel 621 is provided at the junction of the second transplanting roller conveyor 620 and the third conveyor line 300. Simultaneously, a reversing conveyor mechanism 500 is provided within the areas of both the second inlet channel 611 and the second outlet channel 621. The output directions of the first transplanting roller conveyor 610 and the second transplanting roller conveyor 620 are perpendicular to the third conveyor line 300, and the conveying directions between the two transplanting roller conveyors are opposite.

[0037] During operation, the seedling tray 900, loaded with germinating seeds, enters the reversing conveyor 500 within the first transplanting roller line 610 through the second inlet channel 611; then, the reversing conveyor 500 descends, and the rollers transport the seedling tray 900 to the rightmost end of the first transplanting roller line 610. Figure 4 (The orientation of the paper); then, the robotic arm transfers the seedling tray 900 to the seedling tower (not shown in the figure).

[0038] After the seeds in the seedling tray 900 mature on the seedling tower, a robotic arm transfers the seedling tray 900 to the second transplanting roller line 620; under the roller conveyor, the seedling tray 900 moves to the leftmost end of the second transplanting roller line 620. Figure 4 (The orientation of the paper); then, the reversing conveyor mechanism 500 transfers the seedling tray 900 back to the third conveyor line 300 for circulation.

[0039] like Figure 1As shown, in some embodiments, the loop conveyor system also includes a tray-turning machine (not shown) and a washing machine 700. The tray-turning machine is located on the side within the fourth conveyor line 400 and is used to collect the forage from the seedling trays 900. The washing machine 700 is located between the first conveyor line 100 and the fourth conveyor line 400, and the first outlet channel 414 is connected to the inlet of the washing machine 700. It is used to clean the seedling trays 900 after the forage harvest, allowing for reuse.

[0040] It is worth mentioning that the seedling tower, the turning machine, and the cleaning machine 700 in this embodiment are all existing technologies and are not specifically limited here. For specific structures, please refer to patents CN115072298A, CN222757514U, CN118556600A, CN115090635A, etc.

[0041] In this embodiment of the seedling tray conveying system, a germination tank (see patent CN118556600A) is often installed above the first conveyor line 100 to release germinated seeds into the empty seedling trays 900 on the first conveyor line 100. At this time, it is necessary to identify the moving position of the seedling trays 900 to facilitate control of the opening and closing timing of the germination tank's inlet and outlet. Therefore, in this embodiment, a sensing mechanism 800 is also provided on the first conveyor line 100. Of course, depending on the actual working conditions, a sensing mechanism 800 can also be installed on other conveyor lines.

[0042] refer to Figures 6-8 As shown, the sensing mechanism 800 includes a mounting base 810 and a swing plate 820 rotatably mounted on the mounting base 810. A sensing block 830 is connected to one end of the swing plate 820, and a sensing probe 840 that cooperates with the sensing block 830 is provided on the mounting base 810. For ease of description below, the end of the swing plate 820 connected to the sensing block 830 is defined as the first end 821, and the other end is defined as the second end 822.

[0043] In the natural state, the first end 821 of the sensing mechanism 800 is in a downward state due to gravity, which causes the sensing block 830 and the sensing probe 840 to approach or contact each other, and the signal is turned on. When the seedling tray 900 moves to the second end 822 and applies downward gravity to it, it forces the first end 821 to rise, causing the sensing block 830 to move away from the sensing probe 840, and the signal is turned off.

[0044] Specifically, the mounting base 810 is a hollow frame structure. The swing plate 820 is hinged to the mounting base 810 via a pin 850, which is equipped with a cotter pin 860. Meanwhile, the first end 821 extends into the inner cavity of the mounting base 810 through an opening on the mounting base 810; the sensing end of the sensing probe 840 is also located in the inner cavity of the mounting base 810.

[0045] To facilitate the connection between the mounting base 810 and the frame of the first conveyor line 100, lugs 870 are provided on both sides of the mounting base 810, and mounting holes for self-tapping screws are provided on the lugs 870. It should also be noted that the sensing mechanism 800 in this embodiment can be like... Figure 5 As shown in the image, it can be installed on the inside of the rack; it can also be installed on the outside of the rack.

[0046] In one embodiment of the sensing mechanism 800, the sensing probe 840 is disposed on the side plate of the mounting base 810, and the sensing block 830 is disposed on the side of the first end 821. With this design, when the sensing probe 840 senses the sensing block 830, the two are distributed left and right.

[0047] In another embodiment of the sensing mechanism 800, the sensing probe 840 is disposed on the base plate of the mounting base 810, and the sensing block 830 is disposed on the lower surface of the first end 821. With this design, when the sensing probe 840 senses the sensing block 830, the two are distributed vertically.

[0048] In this embodiment, the sensing block 830 and the first end 821 can be connected by adhesive or by bolts. When bolts are used, the bolts can be used as counterweights to ensure that the first end 821 of the swing plate 820 can fall naturally without external force. Of course, if there is a large difference in the weight of the first end 821 and the second end 822, additional counterweights can be used for balance.

[0049] Furthermore, since the sensing mechanism 800 in this embodiment is used in a hydroponic forage production system, it is generally operating in a watery and dusty environment. Traditional photoelectric sensors are easily affected by moisture and dust, which can impact sensing accuracy. Therefore, in this embodiment, the sensing probe 840 can be a metal sensor, and the sensing block 830 can be a metal block. Alternatively, the sensing probe 840 can be a Hall sensor, and the sensing block 830 can be a permanent magnet. Metal sensors and Hall sensors are existing technologies and can be directly purchased.

[0050] The sensing mechanism 800 in this embodiment is hinged to the mounting base 810 via a swing plate 820. The sensor is switched on and off by utilizing the gravity difference between the two ends of the swing plate 820. Compared with the traditional spring structure, it is not only simpler in structure but also has a good service life.

[0051] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A seedling tray conveying system, comprising a first conveying line (100), a second conveying line (200), a third conveying line (300), and a fourth conveying line (400) arranged in a rectangular pattern, characterized in that: The fourth conveyor line (400) includes a mounting frame (410), which is divided into a first region (411) and a second region (412) along its length. The first region (411) is provided with a plurality of first rollers (420) arranged in a horizontal direction, and the first region (411) is provided with a first inlet channel (413) near the third conveyor line (300). The second region (412) is provided with a plurality of longitudinally distributed second rollers (430), and the second region (412) is provided with a first outlet channel (414) near the first conveyor line (100). The mounting frame (410) is equipped with a reversing conveyor mechanism (500) at the bottom of the inlet and first outlet channel area. The reversing conveyor mechanism (500) includes a housing (510), and the housing (510) contains a drive sprocket (520), a driven sprocket (530), and a conveyor chain (540) connecting the drive and driven sprockets. The drive sprocket (520) is connected to a drive source, and the housing (510) is located between two adjacent first rollers (420) or second rollers (430) and is connected to a lifting assembly.

2. The seedling tray conveying system according to claim 1, characterized in that: The third conveyor line (300) is divided into two sections by the transplanting roller line (600), which includes the first transplanting roller line (610). The first transplanting roller line (610) and the third conveyor line (300) are connected by a second inlet channel (611), and the first transplanting roller line (610) is provided with a reversing conveyor mechanism (500) in the area of ​​the second inlet channel (611); wherein the conveying direction of the reversing conveyor mechanism (500) is consistent with the conveying direction of the third conveyor line (300) and perpendicular to the conveying direction of the first transplanting roller line (610).

3. The seedling tray conveying system according to claim 2, characterized in that: The transplanting roller line (600) also includes a second transplanting roller line (620). The second transplanting roller line (620) is provided with a second outlet channel (621) at the junction with the third conveyor line (300), and the second transplanting roller line (620) is provided with a reversing conveyor mechanism (500) in the area of ​​the second outlet channel (621); wherein the conveying direction of the reversing conveyor mechanism (500) is consistent with the conveying direction of the third conveyor line (300) and perpendicular to the conveying direction of the second transplanting roller line (620).

4. A seedling tray conveying system according to any one of claims 1-3, characterized in that: A cleaning machine (700) is provided between the first conveyor line (100) and the fourth conveyor line (400); wherein the first outlet channel (414) is connected to the inlet of the cleaning machine (700).

5. The seedling tray conveying system according to claim 1, characterized in that: The first conveyor line (100) and / or the third conveyor line (300) are provided with a sensing mechanism (800); the sensing mechanism (800) includes a mounting base (810) and a swing plate (820) rotatably disposed on the mounting base (810); wherein, The first end (821) of the swing plate (820) is connected to a sensing block (830), and the mounting base (810) is provided with a sensing probe (840) that cooperates with the sensing block (830). In its natural state, due to gravity, the first end (821) is in a downward state, causing the sensing block (830) and the sensing probe (840) to approach or contact each other, and the signal is connected; when the second end (822) of the swing plate (820) is subjected to external force, it forces the first end (821) to rise, causing the sensing block (830) to move away from the sensing probe (840), and the signal is disconnected.

6. The seedling tray conveying system according to claim 5, characterized in that: The mounting base (810) is a hollow frame structure. The swing plate (820) is hinged to the mounting base (810) through a pin (850), and the pin (850) is equipped with a cotter pin (860). The first end (821) extends into the inner cavity of the mounting base (810) through an opening on the mounting base (810); the sensing end of the sensing probe (840) is located in the inner cavity of the mounting base (810).

7. The seedling tray conveying system according to claim 6, characterized in that: The sensing probe (840) is disposed on the side plate of the mounting base (810), and the sensing block (830) is disposed on the side of the first end (821).

8. A seedling tray conveying system according to claim 6, characterized in that: The sensing probe (840) is mounted on the base plate of the mounting base (810), and the sensing block (830) is mounted on the lower surface of the first end (821) by adhesive or screw.

9. A seedling tray conveying system according to claim 5, characterized in that: The sensing probe (840) is a metal sensor, and the sensing block (830) is a metal block; or, the sensing probe (840) is a Hall sensor, and the sensing block (830) is a permanent magnet.

10. A seedling tray conveying system according to claim 5, characterized in that: The first conveyor line (100) and the third conveyor line (300) are belt conveyors; the mounting base (810) is provided with lugs (870) for connecting to the frame of the belt conveyor.

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