Directional annular fertilization device for tobacco seedlings

Abstract

The utility model belongs to the technical field of directional annular fertilization, and particularly relates to a directional annular fertilization device for tobacco seedlings, which comprises a handheld fertilization storage vertical pipe fitting used for walking and holding in a tobacco seedling planting field, the detachable directional annular fertilization assembly comprises a fertilization protection outer cylinder part connected to the bottom end of the handheld fertilization and storage vertical pipe fitting, a rotating shaft part rotationally mounted in an inner cavity of the handheld fertilization and storage vertical pipe fitting, and an annular fertilization conical cover fixedly mounted at the bottom end of the rotating shaft part and arranged in the center of an inner cavity of the fertilization protection outer cylinder part; the annular fertilization conical cover is arranged on tobacco seedlings in a covering mode, a fertilization discharging opening is formed in the inner bottom wall of the annular fertilization positioning tray, and a quantitative fertilization drawing baffle is inserted into the fertilization discharging opening in a drawing mode; the outer wall of the peripheral side of the annular fertilization positioning tray is in annular positioning sliding connection with the outer wall of the fertilization protection outer cylinder piece through a plurality of positioning rotating screw rods.

Description

Technical Field

[0001] The utility model belongs to the technical field of directional annular fertilization, in particular to a directional annular fertilization device for tobacco seedlings. Background Art

[0002] During the planting of tobacco seedlings, directional circular fertilization equipment is used to improve fertilization efficiency and accuracy. This type of equipment is usually designed to place fertilizers at specific locations around the roots of crops, which helps promote directional growth of the root system and improve fertilizer absorption and utilization, while reducing fertilizer losses and environmental pollution. However, the current tobacco seedling circular fertilization device has a single structure and effect. It is generally used by hand-held fertilizer tubes to freely drop fertilizer from the gap between the bottom conical cover and the hollow cylinder. However, this hand-held fertilization method is easily affected by the hand-held angle and uneven fertilization. When the hand-held fertilizer tube is tilted, the fertilizer will fall to one side on the bottom conical cover, resulting in the circular free-falling fertilizer not being able to form a uniform circle, resulting in uneven fertilization, more fertilizer falling on one side and less on the other side, thereby reducing fertilization efficiency and the healthy growth of tobacco seedlings.

[0003] After searching, the existing Chinese patent publication number: CN206212644U tobacco annular fertilization device includes a feed rod, a feed hopper is provided at the top of the feed rod, a feed port is provided at the bottom of the feed rod, a cylindrical shell is provided below the feed rod, the top of the shell is closed and the bottom is open, a feed port is provided at the top center of the shell, the bottom end of the feed rod is connected with the inner cavity of the shell through the feed port, an inverted cone baffle is provided in the inner cavity of the shell, a discharge bin is formed between the inner wall of the shell and the outer wall of the baffle, and a discharge port is formed between the bottom edge of the baffle and the inner wall of the shell.

[0004] The cited patent document also has the same problem. This handheld fertilization method is easily affected by the holding angle and uneven fertilization. When the handheld fertilizer tube is tilted, the fertilizer will fall to one side on the conical cover at the bottom, resulting in the circular free-falling fertilizer not being able to form a uniform circle, resulting in uneven fertilization, with more fertilizer falling on one side and less on the other side, thereby reducing the fertilization efficiency and the healthy growth of the tobacco seedlings. Utility Model Content

[0005] The utility model aims to provide a tobacco seedling directional annular fertilization device to solve the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tobacco seedling directional annular fertilizing device, comprising a handheld fertilizer storage stand pipe for walking and holding in a tobacco seedling planting field, a feed pipe installed through the upper outer wall of the handheld fertilizer storage stand pipe, and a handle symmetrically installed on the top outer wall of the handheld fertilizer storage stand pipe;

[0007] The bottom end of the handheld fertilizer storage stand pipe is detachably connected with a detachable directional annular fertilizer assembly, and the detachable directional annular fertilizer assembly includes a fertilizer protection outer cylinder connected to the bottom end of the handheld fertilizer storage stand pipe, a rotating shaft rotatably installed in the inner cavity of the handheld fertilizer storage stand pipe, and an annular fertilizer cone cover fixedly installed at the bottom end of the rotating shaft and arranged at the center of the inner cavity of the fertilizer protection outer cylinder;

[0008] The annular fertilization cone cover is arranged on the tobacco seedlings, and the bottom end of the annular fertilization cone cover is integrally connected with an annular fertilization positioning tray, and the inner bottom wall of the annular fertilization positioning tray is provided with a fertilizer discharge port, and a quantitative fertilization pull-out baffle is pulled out and inserted in the fertilizer discharge port, and the peripheral outer wall of the annular fertilization positioning tray is annularly positioned and slidably connected with the outer wall of the fertilizer protection outer cylinder through a plurality of positioning rotating screws.

[0009] Preferably, in this solution, an annular positioning groove is provided at the lower portion of the outer wall of the fertilization protection outer cylinder, and a plurality of the positioning rotating screws are distributed in an annular array and penetrate through the circumferential outer wall of the annular fertilization positioning tray.

[0010] Preferably, in the present solution, a positioning steel ball is embedded and rolled inside the screw end of the positioning rotating screw, and the positioning steel ball rolls and rubs on the inner wall of the annular positioning groove.

[0011] In this solution, the inner walls on both sides of the fertilizer discharge port are extended in opposite directions to form plug-in track grooves for plugging in the quantitative fertilizer pull-out baffle;

[0012] The bottom surface of the annular fertilization positioning tray is connected to the quantitative fertilization drawing baffle through a locking screw.

[0013] Preferably, a hollow sleeve is integrally connected to the middle position of the top surface of the fertilization protection outer cylinder, and the bottom end of the handheld fertilization storage riser is inserted into the hollow sleeve and connected together by a locking bolt.

[0014] Preferably, a stepper motor is mounted on the upper portion of the inner cavity of the handheld fertilizer storage stand pipe member via screws, and an output shaft of the stepper motor is connected to the top end of the rotating shaft member via a reducer.

[0015] Preferably, in this solution, a sealed bearing is interference fit on the circumferential side of one end of the rotating shaft member close to the annular fertilizer cone cover, a bearing ring seat is provided on the outer side of the sealed bearing, and support rods are symmetrically welded between the outer wall of the bearing ring seat and the inner wall of the handheld fertilizer storage stand pipe member.

[0016] Preferably, a separate storage battery is embedded in the upper outer wall of the handheld fertilizer storage stand pipe, a junction box is embedded in the top surface of the handheld fertilizer storage stand pipe, and a control button is provided on the top surface of the junction box.

[0017] In this embodiment, the center of the inner bottom wall of the annular fertilizer positioning tray has a tobacco seedling protection opening for the tobacco seedlings to extend into;

[0018] An annular storage area for storing fertilizer is arranged between the inner wall of the annular fertilization positioning tray and the outer wall of the annular fertilization cone cover.

[0019] Compared with the prior art, the technical effects and advantages of the utility model are as follows:

[0020] The tobacco seedling directional annular fertilization device realizes accurate and uniform distribution of fertilizer at the roots of tobacco seedlings through a detachable directional annular fertilization component, especially a linkage design of an annular fertilization cone cover and a fertilization positioning tray, overcomes the problem of uneven traditional hand-held fertilization, improves fertilizer absorption efficiency, and promotes the healthy growth of tobacco seedlings. The positioning rotating screw and the positioning steel ball cooperate with the annular positioning groove, so that the annular fertilization positioning tray can flexibly adjust its position and can drive the fertilizer discharge port to rotate one circle, thereby forming a uniform annular directional quantitative fertilization for the falling fertilizer, ensuring that the stems of the seedlings are not subjected to mechanical compression or direct impact of the fertilizer during the fertilization process, protecting the normal growth of the seedlings, and forming a uniform annular fertilization area around the tobacco seedlings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the handheld fertilizer storage stand pipe and the fertilizer protection outer cylinder of the utility model in the disassembled state;

[0024] Figure 3It is a schematic diagram of the structure of the fertilization protection outer cylinder and the annular fertilization positioning tray of the utility model in the disassembled state;

[0025] Figure 4 It is a structural schematic diagram of the connection state of the rotating shaft member and the annular fertilizer cone cover of the utility model;

[0026] Figure 5 It is a structural schematic diagram of the connection state of the rotating shaft and the sealed bearing of the utility model;

[0027] Figure 6 It is a schematic diagram of the connection state structure of the quantitative fertilization pull-out baffle and the annular fertilization positioning tray of the utility model;

[0028] Figure 7 For this utility model Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0029] Description of reference numerals:

[0030] In the figure: 1. Handheld fertilizer storage stand pipe; 2. Feed pipe; 3. Feed cover; 4. Handle; 5. Fertilizer protection outer cylinder; 6. Ring fertilizer positioning tray; 7. Removable directional ring fertilizer assembly; 8. Hollow sleeve; 9. Locking bolt; 10. Rotating shaft;

[0031] 11. Annular fertilizer cone cover; 12. Annular positioning groove; 13. Positioning rotating screw; 14. Threaded hole; 15. Annular material storage area; 16. Stepper motor; 17. Speed ​​reducer; 18. Bearing ring seat; 19. Support rod; 20. Sealed bearing;

[0032] 21. Tobacco seedling protection port; 22. Fertilizer discharge port; 23. Insertion and extraction track groove; 24. Quantitative fertilization pull-out baffle; 25. Pull ring; 26. Positioning steel ball; 27. Separate storage battery; 28. Display screen; 29. ​​Junction box; 30. Control button. DETAILED DESCRIPTION

[0033] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0034] Unless otherwise defined, the directions of up, down, left, right, front, back, inside and outside involved in this document are based on the directions of up, down, left, right, front, back, inside and outside in the figures shown in the present utility model, and are explained here together.

[0035] This embodiment provides Figures 1 to 7 The tobacco seedling directional annular fertilizing device shown comprises a handheld fertilizer storage stand pipe 1 for walking and holding in a tobacco seedling planting field, a feed pipe 2 installed through the upper outer wall of the handheld fertilizer storage stand pipe 1, and a handle 4 symmetrically installed on the outer wall of the top of the handheld fertilizer storage stand pipe 1, which is convenient for the operator to hold the device steadily. A feed top cover 3 is threadedly connected to the top of the feed pipe 2, and the feed top cover 3 ensures that fertilizer will not overflow during transportation or non-operation. A separate storage battery 27 is embedded in the upper outer wall of the handheld fertilizer storage stand pipe 1, and a junction box 29 is embedded in the top surface of the handheld fertilizer storage stand pipe 1. A control button 30 is arranged on the top surface of the junction box 29. A display screen 28 is embedded in the outer wall of the handheld fertilizer storage stand pipe 1 above the separate storage battery 27.

[0036] In this embodiment, the interior of the handheld fertilizer storage standpipe 1 is designed as a cavity for storing fertilizer. A feed pipe 2 is installed on its upper outer wall for adding fertilizer. A separate storage battery 27 provides an independent power supply for the entire device. The design of the separate storage battery allows the fertilization device to be operated without an external power supply, greatly improving the flexibility and portability of use. Especially when working in the field, it is not limited by power supply, ensuring efficient fertilization in areas far away from the power grid. The function of the display screen 28 is to display the working status information of the device in real time, including but not limited to the battery power, which should be selected according to the actual application. A PLC for controlling the opening and closing of each device is provided in the junction box 29, and the PLC should be selected according to the actual application scenario.

[0037] In this embodiment, the bottom end of the handheld fertilizer storage stand pipe 1 is detachably connected with a detachable directional annular fertilizer assembly 7, which includes a fertilizer protection outer cylinder 5 connected to the bottom end of the handheld fertilizer storage stand pipe 1, a rotating shaft 10 rotatably installed in the inner cavity of the handheld fertilizer storage stand pipe 1, and an annular fertilizer cone cover 11 fixedly installed at the bottom end of the rotating shaft 10 and arranged at the center of the inner cavity of the fertilizer protection outer cylinder 5. The annular fertilizer cone cover 11 is located in the fertilizer protection outer cylinder 5 and covers the tobacco seedlings to ensure that the fertilizer is evenly distributed around the roots of the seedlings.

[0038] In this embodiment, the annular fertilizer cone cover 11 is directly located above the tobacco seedlings. Through the cone shape design, the fertilizer is evenly distributed around the roots of the seedlings to promote the directional growth of the root system. The cooperation with the fertilizer positioning tray ensures the accuracy and effectiveness of fertilization.

[0039] In this embodiment, the annular fertilizer cone cover 11 is arranged on the tobacco seedlings, and the bottom end of the annular fertilizer cone cover 11 is integrally connected with an annular fertilizer positioning tray 6. An annular storage area 15 for storing fertilizer is arranged between the inner wall of the annular fertilizer positioning tray 6 and the outer wall of the annular fertilizer cone cover 11. The annular storage area 15 is used to temporarily store the fertilizer to be applied. This design ensures the continuity of fertilizer supply during the fertilization process and avoids interruption of fertilization. It also helps to maintain the uniformity of fertilization rate and improve the stability and efficiency of fertilization. A fertilizer discharge port 22 is provided on the inner bottom wall of the annular fertilizer positioning tray 6, that is, the fertilizer discharge port 22 is opened at the inner bottom wall of the annular storage area 15. A quantitative fertilizer pull-out baffle 24 is pulled out and inserted in the fertilizer discharge port 22, and the peripheral outer wall of the annular fertilizer positioning tray 6 is annularly positioned and slidably connected with the outer wall of the fertilizer protection outer cylinder 5 through a plurality of positioning rotating screws 13. The center of the inner bottom wall of the annular fertilizer positioning tray 6 is provided with a tobacco seedling protection opening 21 for the tobacco seedlings to extend into. The tobacco seedling protection opening 21 is located at the center of the inner bottom wall of the annular fertilizer positioning tray 6 and is specially designed for tobacco seedlings to ensure that the stems of the seedlings are not subjected to mechanical compression or direct impact of fertilizers during fertilization, thereby protecting the normal growth of the seedlings and reducing physical damage to the plants.

[0040] In this embodiment, the annular fertilizer positioning tray 6 is integrated with the bottom end of the annular fertilizer cone cover 11, and has a built-in fertilizer discharge port 22, and the fertilizer release amount is controlled by the quantitative fertilizer pull-out baffle 24. The annular fertilizer positioning tray 6 is located inside the fertilizer protection outer cylinder 5 and is directly connected to the annular fertilizer cone cover 11, forming a uniform annular fertilization area around the tobacco seedlings. The fertilizer discharge port 22 opened on the inner bottom wall of the tray and the quantitative fertilizer pull-out baffle 24 that is pulled and plugged in work together to control the amount of fertilizer falling and achieve precise fertilization. The outer wall of the circumferential side of the tray is connected to the annular positioning groove 12 of the outer cylinder through the positioning rotating screw 13, and the fertilization position can be adjusted according to actual needs to ensure that the fertilizer is evenly distributed at the root of the tobacco seedlings.

[0041] In this embodiment, an annular positioning groove 12 is provided at the lower part of the outer wall of the fertilizer protection outer cylinder 5, and a plurality of positioning rotating screws 13 are distributed in an annular array and penetrate the outer wall of the circumference of the annular fertilizer positioning tray 6. A threaded hole 14 for installing the positioning rotating screw 13 is provided on the outer wall of the circumference of the annular fertilizer positioning tray 6, and a positioning steel ball 26 is rolled and embedded inside the screw end of the positioning rotating screw 13, and the positioning steel ball 26 rolls and rubs on the inner wall of the annular positioning groove 12. The inner walls on both sides of the fertilizer discharge port 22 are extended in opposite directions to provide plug-in track grooves 23 for plugging in the quantitative fertilizer pull-out baffle 24, and the bottom surface of the annular fertilizer positioning tray 6 is connected to the quantitative fertilizer pull-out baffle 24 by a locking screw. A pull ring 25 is welded on the outer wall of the quantitative fertilizer pull-out baffle 24.

[0042] In this embodiment, the design of the positioning rotating screw 13 and the positioning steel ball 26 enables the tray to slide smoothly along the annular positioning groove 12 to adjust the position of the fertilizer falling. The positioning steel ball 26 is built into the positioning rotating screw 13 and contacts the inner wall of the annular positioning groove 12. The rolling friction principle is used to reduce resistance, so that the annular fertilizer positioning tray 6 moves more smoothly and labor-saving, while ensuring the stability and accuracy of positioning.

[0043] In this embodiment, the plug-in track groove 23 is arranged on the inner wall on both sides of the fertilizer discharge port 22, providing a guide track for the insertion of the quantitative fertilization pull-out baffle 24, so that the quantitative fertilization pull-out baffle 24 can be smoothly pulled along the track, which is convenient for the user to quickly adjust the amount of fertilizer as needed, thereby improving the flexibility of the fertilization operation. The quantitative fertilization pull-out baffle 24 is inserted into the plug-in track groove 23 of the fertilizer discharge port 22. By changing the position of the quantitative fertilization pull-out baffle 24, the opening size of the fertilizer discharge port 22 can be controlled, thereby achieving precise control of the amount of fertilizer. The connection method with the locking screw ensures the fixed position of the quantitative fertilization pull-out baffle 24 to prevent accidental changes during operation.

[0044] In this embodiment, a hollow sleeve 8 is integrally connected to the middle position of the top surface of the fertilizer protection outer cylinder 5, the bottom end of the handheld fertilizer storage stand pipe 1 is inserted into the hollow sleeve 8 and connected together by a locking bolt 9, a stepper motor 16 is installed on the upper part of the inner cavity of the handheld fertilizer storage stand pipe 1 by screws, and the output shaft of the stepper motor 16 is connected to the top of the rotating shaft 10 through a reducer 17, and a sealed bearing 20 is interference fit on the circumferential side of one end of the rotating shaft 10 close to the annular fertilizer cone cover 11, and a bearing ring seat 18 is provided on the outer side of the sealed bearing 20, and a support rod 19 is symmetrically welded between the outer wall of the bearing ring seat 18 and the inner wall of the handheld fertilizer storage stand pipe 1.

[0045] In this embodiment, the hollow sleeve 8 is used as a connecting piece between the handheld fertilizer storage stand pipe 1 and the fertilizer protection outer cylinder 5. The design of the hollow sleeve 8 ensures a stable connection between the two without hindering the flow of fertilizer. Through the hollow structure, fertilizer can be smoothly transferred from the handheld fertilizer storage stand pipe 1 to the inside of the fertilizer protection outer cylinder 5, and then applied to the seedlings through the annular fertilizer cone cover 11. At the same time, the cooperation of the hollow sleeve 8 and the locking bolt 9 can achieve the effect of quickly disassembling and replacing the fertilizer protection outer cylinder 5.

[0046] In this embodiment, the rotating shaft 10 is installed inside the fertilizing device and driven by the stepper motor 16 and the reducer 17 to realize the rotation movement of the annular fertilizing cone cover 11. This makes the fertilization process more uniform and avoids the uneven fertilization caused by the hand-held tilt angle problem of the traditional hand-held fertilizing tube. The rotation of the rotating shaft 10 is stably supported by the cooperation of the sealed bearing 20 and the support rod 19 to ensure long-term stable operation.

[0047] Working principle:

[0048] The tobacco seedling directional annular fertilization device opens the feed cover 3 on the top of the feed pipe 2 to add an appropriate amount of fertilizer to the inner cavity of the handheld fertilizer storage stand pipe 1. The fertilizer is stored inside the handheld fertilizer storage stand pipe 1, waiting for distribution. The annular fertilizer cone cover 11 is placed on the tobacco seedlings, and the built-in stepper motor 16 converts the high speed of the motor into the low-speed, high-torque rotational power required by the shaft member 10 through the reducer 17. As the shaft member 10 rotates, the annular fertilizer cone cover 11 fixed at its bottom end also begins to rotate around the tobacco seedlings. At this time, the fertilizer in the annular fertilizer positioning tray 6 falls evenly through the fertilizer discharge port 22. By adjusting the position of the quantitative fertilization pull-out baffle 24, the amount of fertilizer can be controlled to achieve precise fertilization. The pull ring 25 helps the operator to easily adjust the baffle position;

[0049] The outer wall of the annular fertilizer positioning tray 6 rolls in the annular positioning groove 12 through the positioning rotating screw 13 and the positioning steel ball 26 inside it, so as to realize the rotation of the annular fertilizer positioning tray 6 and the annular fertilizer positioning tray 6. When the fertilizer falling from the fertilizer discharge port 22 rotates one circle, the stepper motor 16 is stopped so that the fertilizer is no longer distributed. The bearing ring seat 18 and the support rod 19 firmly support the rotating shaft 10 to reduce vibration.

[0050] It should be noted that, in this article, relational terms such as one and two are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tobacco seedling directional annular fertilizing device, comprising a handheld fertilizer storage stand pipe (1) for walking and holding in a tobacco seedling planting area, a feed pipe (2) installed through the upper outer wall of the handheld fertilizer storage stand pipe (1), and a handle (4) symmetrically installed on the top outer wall of the handheld fertilizer storage stand pipe (1), characterized in that ； The bottom end of the handheld fertilizer storage stand pipe (1) is detachably connected to a detachable directional annular fertilizer assembly (7), and the detachable directional annular fertilizer assembly (7) comprises a fertilizer protection outer cylinder (5) connected to the bottom end of the handheld fertilizer storage stand pipe (1), a rotating shaft (10) rotatably mounted in the inner cavity of the handheld fertilizer storage stand pipe (1), and an annular fertilizer cone cover (11) fixedly mounted at the bottom end of the rotating shaft (10) and arranged at the center of the inner cavity of the fertilizer protection outer cylinder (5); The annular fertilization cone cover (11) is arranged on the tobacco seedlings, the bottom end of the annular fertilization cone cover (11) is integrally connected with an annular fertilization positioning tray (6), the inner bottom wall of the annular fertilization positioning tray (6) is provided with a fertilizer discharge port (22), a quantitative fertilization pull-out baffle (24) is pulled out and inserted in the fertilizer discharge port (22), and the peripheral outer wall of the annular fertilization positioning tray (6) is annularly positioned and slidably connected with the outer wall of the fertilizer protection outer cylinder (5) through a plurality of positioning rotating screws (13).

2. A tobacco seedling directional annular fertilization device according to claim 1, characterized in that: An annular positioning groove (12) is provided at the lower portion of the outer wall of the fertilization protection outer cylinder (5), and a plurality of positioning rotary screws (13) are distributed in an annular array and penetrate the outer wall of the annular fertilization positioning tray (6).

3. A tobacco seedling directional annular fertilization device according to claim 2, characterized in that: A positioning steel ball (26) is rolled and embedded in the screw end of the positioning rotating screw (13), and the positioning steel ball (26) rolls and rubs on the inner wall of the annular positioning groove (12).

4. A tobacco seedling directional annular fertilization device according to claim 3, characterized in that: The inner walls on both sides of the fertilizer discharge port (22) extend in opposite directions and are provided with plug-in and pull-out track grooves (23) for plugging in a quantitative fertilizer pull-out baffle (24); The bottom surface of the annular fertilization positioning tray (6) is connected to the quantitative fertilization pull-out baffle (24) via a locking screw.

5. A tobacco seedling directional annular fertilization device according to claim 4, characterized in that: A hollow sleeve (8) is integrally connected to the middle position of the top surface of the fertilizer protection outer cylinder (5), and the bottom end of the handheld fertilizer storage standpipe (1) is inserted into the hollow sleeve (8) and connected together via a locking bolt (9).

6. A tobacco seedling directional annular fertilization device according to claim 5, characterized in that: A stepper motor (16) is installed on the upper part of the inner cavity of the handheld fertilizer storage stand pipe (1) by means of screws, and the output shaft of the stepper motor (16) is connected to the top end of the rotating shaft (10) via a reducer (17).

7. A tobacco seedling directional annular fertilization device according to claim 6, characterized in that: A sealed bearing (20) is interference-fitted on the circumferential side of one end of the rotating shaft (10) close to the annular fertilizer cone cover (11), and a bearing ring seat (18) is provided on the outer side of the sealed bearing (20). Support rods (19) are symmetrically welded between the outer wall of the bearing ring seat (18) and the inner wall of the handheld fertilizer storage stand pipe (1).

8. A tobacco seedling directional annular fertilization device according to claim 7, characterized in that: A separate storage battery (27) is embedded in the upper outer wall of the handheld fertilizer storage stand pipe (1), a junction box (29) is embedded in the top surface of the handheld fertilizer storage stand pipe (1), and a control button (30) is provided on the top surface of the junction box (29).

9. A tobacco seedling directional annular fertilization device according to claim 8, characterized in that: The center of the inner bottom wall of the annular fertilizer positioning tray (6) is provided with a tobacco seedling protection opening (21) for the tobacco seedlings to extend into; An annular storage area (15) for storing fertilizer is arranged between the inner wall of the annular fertilizer positioning tray (6) and the outer wall of the annular fertilizer cone cover (11).

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