Intelligent fertilization device for agricultural planting

Abstract

The application belongs to the technical field of agricultural devices, and discloses a targeted intelligent fertilizing device for agricultural planting, which comprises a targeted fertilizing unit, the targeted fertilizing unit comprises a pump, the output end of the pump is sealingly assembled with a water pipe, the side end of the water pipe is fixedly connected with a plurality of horizontally equidistantly arranged drip irrigation heads for applying liquid fertilizer, and the targeted fertilizing unit cooperatively works with a pipeline mounting unit, a mode switching unit, an intelligent control driving unit and a limiting mounting unit. The application realizes linkage and separation of pipeline sections by on-off control of the electromagnetic connecting block, and can flexibly switch between overall cooperative adjustment and local independent fine adjustment modes by the electric drive of the electric push rod one and the transmission action of the horizontal node rod. The targeted intelligent fertilizing device can meet the efficient position adjustment demand of large-scale planting, can adapt to the growth differences of weak seedlings and strong seedlings, and effectively solves the problem that the traditional fixed drip irrigation pipe cannot be targetedly adapted to uneven growth of crops.

Description

Technical Field

[0001] This invention belongs to the field of agricultural equipment technology, specifically a targeted intelligent fertilization device for agricultural planting. Background Technology

[0002] In the fields of agricultural greenhouse cultivation and large-scale crop production, drip irrigation fertilization technology has become a mainstream field management method due to its ability to reduce water and fertilizer waste and meet the needs of precision planting. Its core is the use of advanced sensing, analysis, and execution technologies to achieve an intelligent system for on-demand, precise, and variable-rate fertilization. It has completely changed the traditional extensive method of uniform spreading. Existing drip irrigation fertilization devices mostly use fixed, laid strip pipes as their core, delivering water and fertilizer to the crop root zone through drip heads on the pipes. The pipes are typically made of corrosion-resistant materials such as PE and PVC and are pre-laid on the soil surface according to the crop planting rows. These devices are simple in structure, low in cost, and can meet basic large-scale fertilization needs.

[0003] For example, a drip irrigation fertilization and pesticide application device, disclosed in CN221598863U, specifically relates to the field of agricultural fertilization equipment technology. It includes a mixing container, a drip irrigation main pipe, a power unit, an inlet pipe, an outlet pipe, a first three-way valve, and a second three-way valve. Two ports of the first three-way valve are connected to and communicate with the drip irrigation main pipe, and the other port of the first three-way valve is connected to and communicate with the inlet pipe, which is connected to and communicates with the mixing container. Both ports of the second three-way valve are connected to and communicate with the drip irrigation main pipe. This invention can improve the mixing uniformity and pesticide concentration of fertilizers or pesticides, thereby increasing fertilization efficiency.

[0004] While the above solutions can improve the uniformity of fertilizer or pesticide mixing and the concentration of pesticides, thereby increasing fertilization efficiency, in large-scale planting scenarios, crops are prone to uneven growth due to differences in growth environment and nutrient absorption capacity, resulting in weak seedlings and strong seedlings. The fixed position of the drip irrigation head in the pipeline is not easy to make targeted fine adjustments, making it difficult to adapt to differentiated planting needs. Adjustments require manual operation segment by segment, which is not only time-consuming and labor-intensive, but also cannot meet the high-efficiency operation requirements of large-scale planting. Summary of the Invention

[0005] To address the problems mentioned in the background section, this invention provides a targeted intelligent fertilization device for agricultural planting.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a targeted intelligent fertilization device for agricultural planting, comprising a targeted fertilization unit, wherein the targeted fertilization unit includes a pump, the output end of which is sealed with a water pipe, and the side end of the water pipe is fixedly connected to a plurality of horizontally equidistant drip irrigation heads for applying liquid fertilizer, and further comprising:

[0007] The pipeline installation unit is located outside the pump. The pipeline installation unit includes multiple pairs of external clamps for limiting the water pipe, which are sleeved outside the pump. The drip irrigation head is located between two external clamps. A connecting horizontal plate is fixedly connected to the upper side of the two external clamps that are close to each other. An adjustable horizontal cylinder is fixedly connected to the upper end of the connecting horizontal plate to adjust the position of a pair of external clamps directly below. A guide cylinder is slidably connected to the outside of the adjustable horizontal cylinder. An installation side plate is fixedly connected to the lower end of the guide cylinder. Multiple soil-inserting vertical rods for insertion into the soil layer for fixation are fixedly connected to the lower end of the installation side plate.

[0008] A mode switching unit is installed at the end of the mounting side plate away from the pump. The mode switching unit includes an extension bar, an outer slider is slidably connected to the extension bar, an electromagnetic connecting block is magnetically connected to the outer slider, and transverse node rods are symmetrically fixedly connected to both sides of the electromagnetic connecting block.

[0009] Preferably, it also includes a limiting installation unit, which is installed at the connection position of the adjustable horizontal cylinder and the guide outer cylinder. The limiting installation unit includes a vertical hole, and a vertical insertion rod for limiting the adjustable horizontal cylinder and the guide outer cylinder is inserted between two vertically corresponding vertical holes. The upper ends of the multiple vertical insertion rods are fixedly connected to a horizontal connecting rod.

[0010] Preferably, the sleeve end of the outer slider of the bar is slidably connected to the outer side of the extension bar, and the top of the outer slider of the bar is fixedly connected to the end of the adjustable limit cross cylinder.

[0011] Preferably, it further includes an intelligent control drive unit, which is installed at the drive of the limit installation unit and the mode switching unit, and the intelligent control drive unit includes a T-shaped mounting base plate.

[0012] Preferably, an electric push rod is fixedly connected to the side end of the T-shaped mounting base plate, and a T-shaped linkage plate is provided at the output end of the electric push rod. The end of the T-shaped linkage plate away from the electric push rod is fixedly connected to the outer slider of the outermost bar.

[0013] Preferably, an electric push rod two is fixedly connected to the upper end of the T-shaped mounting base plate, and a strip linkage rod is installed at the output end of the electric push rod two. The end of the strip linkage rod away from the electric push rod two is fixedly connected to the outermost end of the transverse connecting rod.

[0014] Preferably, the first electric push rod has a built-in PLC controller, which is electrically connected to the first electric push rod, the second electric push rod, and multiple electromagnetic connecting blocks via wires.

[0015] Preferably, the vertical holes are respectively opened on the surface of the adjustable horizontal cylinder, the guide outer cylinder, and the mounting side plate, and the multiple soil-inserting vertical rods are arranged horizontally at equal intervals.

[0016] Preferably, the insertion end of the vertical rod is fixedly connected with a tapered docking protrusion that facilitates penetration through multiple vertical holes, and the targeted fertilization unit is assembled in the planting greenhouse.

[0017] Preferably, the water pipe is laid at the side of the plant roots in the planting greenhouse, and the outlet position of the water pipe can be adaptively adjusted according to the expansion diameter of the plant root system.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] This invention utilizes the coordinated structure of a mode switching unit, an intelligent control drive unit, and a limit installation unit. By controlling the on / off state of the electromagnetic connecting block, it achieves the linkage and separation of pipeline sections. Combined with the electric drive of the electric push rod and the transmission action of the transverse node rod, it can flexibly switch between overall coordinated adjustment and local independent fine-tuning modes. This not only meets the high-efficiency position adjustment needs of large-scale planting but also adapts to the differences in growth between weak and strong seedlings, effectively solving the problem that traditional fixed drip irrigation pipes cannot specifically adapt to uneven crop growth.

[0020] This invention achieves rapid adjustment and stable fixation of the water pipe position by setting up a pipe installation unit, a limit installation unit and an intelligent control drive unit in a coordinated structure. It utilizes the sliding sleeve relationship between the adjustable horizontal cylinder and the guide outer cylinder, combined with the electric push rod driving the vertical insertion rod to lift and lock. This eliminates the need for repeated manual disassembly and laying of pipes, greatly reducing labor input. At the same time, the soil-inserting vertical rod ensures that the equipment is installed stably in the soil, making it suitable for use in planting scenarios such as greenhouses. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the targeted fertilization unit of the present invention;

[0022] Figure 2 This is a schematic diagram of the state structure of the targeted fertilization unit of the present invention located in the working area;

[0023] Figure 3 For the present invention Figure 2 A schematic diagram of a partially truncated and enlarged section of the central working area;

[0024] Figure 4 This is a schematic diagram of the targeted fertilization unit structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the pipe installation unit structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the pipe installation unit and water pipe assembly state of the present invention;

[0027] Figure 7 This is a schematic diagram of the mode switching unit structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the enlarged structure of the partial truncation of the transverse connecting rod of the present invention;

[0029] Figure 9 This is a schematic diagram of the enlarged structure of the partial truncation at the extension bar of the present invention;

[0030] Figure 10 This is a schematic diagram of the intelligent control drive unit structure of the present invention.

[0031] In the diagram: 1. Targeted fertilization unit; 10. Pump; 11. Water pipe; 12. Drip irrigation head; 2. Pipe installation unit; 20. External pipe clamp; 21. Connecting horizontal plate; 22. Adjustable horizontal cylinder; 23. Guide outer cylinder; 24. Installation side plate; 25. Soil insertion vertical rod; 3. Limiting installation unit; 30. Vertical hole; 31. Vertical insertion rod; 32. Conical docking protrusion; 33. Horizontal connecting rod; 4. Mode switching unit; 40. Extension bar; 41. Bar outer slider; 43. Electromagnetic connecting block; 44. Horizontal node rod; 5. Intelligent control drive unit; 50. T-shaped mounting base plate; 51. Electrical push rod one; 52. T-shaped linkage plate; 53. Electrical push rod two; 54. Strip linkage rod. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] like Figures 1 to 10 As shown, the present invention provides a targeted intelligent fertilization device for agricultural planting, including a targeted fertilization unit 1. The targeted fertilization unit 1 includes a pump 10. The output end of the pump 10 is sealed with a water pipe 11. The side end of the water pipe 11 is fixedly connected to a plurality of horizontally equidistant drip irrigation heads 12 for applying liquid fertilizer.

[0034] The above scheme is adopted: the pump 10 is fixedly installed in the corner of the planting greenhouse and is a stainless steel electric diaphragm pump. Its input end is connected to the external liquid fertilizer storage tank through the pipeline. The water pipe 11 is laid along the planting row of plants in the greenhouse. The drip irrigation head 12 is directed towards the root area of ​​each plant. The drip irrigation head 12 is a pressure-compensating dripper to ensure that the liquid fertilizer can be accurately dripped into the soil around the roots, avoiding fertilizer waste and nutrient loss.

[0035] like Figures 2 to 4As shown, it also includes a pipe installation unit 2, which is set outside the pump 10. The pipe installation unit 2 includes multiple pairs of external clamps 20 for limiting the water pipe 11, which are sleeved outside the pump 10. The drip irrigation head 12 is located between two external clamps 20. A connecting horizontal plate 21 is fixedly connected to the upper side of the two external clamps 20 that are close to each other. An adjustable horizontal cylinder 22 is fixedly connected to the upper end of the connecting horizontal plate 21, which can adjust the position of a pair of external clamps 20 directly below. A guide outer cylinder 23 is slidably connected to the outside of the adjustable horizontal cylinder 22. An installation side plate 24 is fixedly connected to the lower end of the guide outer cylinder 23. Multiple soil insertion vertical rods 25 for insertion into the soil layer for fixation are fixedly connected to the lower end of the installation side plate 24.

[0036] The above scheme is adopted: each pair of external clamps 20 are fastened to the outer wall of the water pipe 11 by bolts, forming a two-way clamping limit on the water pipe 11 to prevent the water pipe 11 from shifting due to liquid impact during fertilization. The connecting horizontal plate 21 is horizontally welded to the upper end of the two external clamps 20, so that the adjustable horizontal cylinder 22 can drive the external clamps 20 to move synchronously. The adjustable horizontal cylinder 22 can slide horizontally along the inner wall of the guide outer cylinder 23, thereby adjusting the position of the water pipe 11 in the horizontal direction. The soil insertion vertical rod 25 is vertically fixed to the lower end face of the installation side plate 24. When inserting into the soil layer, it is necessary to ensure that the depth is not less than 20 centimeters to ensure the stability of the overall structure on the soil surface.

[0037] like Figure 1 , Figures 5 to 8 As shown, it also includes a limiting installation unit 3, which is installed at the connection position of the adjustable horizontal cylinder 22 and the guide outer cylinder 23. The limiting installation unit 3 includes a vertical hole 30, and a vertical insertion rod 31 for limiting the adjustable horizontal cylinder 22 and the guide outer cylinder 23 is inserted between two vertically corresponding vertical holes 30. The upper ends of the multiple vertical insertion rods 31 are fixedly connected to a horizontal connecting rod 33.

[0038] The above scheme is adopted: the vertical holes 30 are opened along the height direction of the adjustable horizontal cylinder 22 and the guide outer cylinder 23 respectively, so as to facilitate the adjustment of the horizontal position of the water pipe 11 according to the growth needs of the plant. The vertical insertion rod 31 is inserted into the corresponding vertical hole 30 from top to bottom. The tapered docking protrusion 32 quickly penetrates through the multiple vertical holes 30, so as to achieve relative fixation of the adjustable horizontal cylinder 22 and the guide outer cylinder 23. The horizontal connecting rod 33 is horizontally welded to the upper end of multiple vertical insertion rods 31, so that multiple vertical insertion rods 31 rise and fall synchronously, improving the convenience of the limit operation.

[0039] like Figure 1 , Figures 7 to 10As shown, it also includes a mode switching unit 4, which is installed at the end of the mounting side plate 24 away from the pump 10. The mode switching unit 4 includes an extension bar 40, an outer slider 41 is slidably connected to the extension bar 40, and an electromagnetic connecting block 43 is magnetically connected to the outer slider 41. The electromagnetic connecting block 43 is a DC electromagnet. The sleeve end of the outer slider 41 is slidably connected to the outer side of the extension bar 40. The top of the outer slider 41 and the end of the adjustable limit cylinder 22 are fixedly connected to each other. Horizontal node rods 44 are symmetrically fixedly connected to both sides of the electromagnetic connecting block 43.

[0040] The above scheme is adopted: the extension bar 40 provides a sliding track for the outer slider 41 of the bar. The sleeve end of the outer slider 41 is sleeved on the outside of the extension bar 40 and can slide freely along the length of the extension bar 40, driving the water pipe 11 of the corresponding pipe section to move. The electromagnetic connecting block 43 is connected to the PLC controller of the intelligent control drive unit 5 through the wire. When energized, it generates magnetism and attracts the outer slider 41 of the bar. When de-energized, the magnetism disappears and the connection is released. The transverse node rod 44 is horizontally fixed on both sides of the electromagnetic connecting block 43, which can form a linkage between multiple sets of outer sliders 41 of the bar. The outer slider 41 of the bar is made of magnetic material to realize the synchronous or independent movement of multiple pipe sections.

[0041] like Figure 1 , Figures 7 to 10 As shown, it also includes an intelligent control drive unit 5, which is installed at the drive of the limit installation unit 3 and the mode switching unit 4. The intelligent control drive unit 5 includes a T-shaped mounting base plate 50. An electric push rod 51 is fixedly connected to the side end of the T-shaped mounting base plate 50. A T-shaped linkage plate 52 is provided at the output end of the electric push rod 51. The end of the T-shaped linkage plate 52 away from the electric push rod 51 is fixedly connected to the outer slider 41 of the outermost bar. An electric push rod 53 is fixedly connected to the upper end of the T-shaped mounting base plate 50. A bar linkage rod 54 is installed at the output end of the electric push rod 53. The end of the bar linkage rod 54 away from the electric push rod 53 is fixedly connected to the outermost end of the transverse connecting rod 33. The electric push rod 51 has a built-in PLC controller. The PLC controller is electrically connected to the electric push rod 51, the electric push rod 53 and multiple electromagnetic connecting blocks 43 through wires.

[0042] The above scheme is adopted: the T-shaped mounting base plate 50 is fixedly installed on the support of the planting greenhouse to provide stable support for the electric push rod 1 51 and the electric push rod 2 53. The electric push rod 1 51 is set horizontally, and its output end is fixed to the T-shaped linkage plate 52 by bolts. It can push the T-shaped linkage plate 52 to move horizontally, thereby driving the outer slider 41 of the outermost bar to move synchronously. The electric push rod 2 53 is set vertically, and its output end is fixed to the bar linkage rod 54. Through the telescopic movement, it drives the bar linkage rod 54 to rise and fall, thereby controlling the rise and fall of the horizontal connecting rod 33 and the vertical insertion rod 31. The PLC controller can preset the movement parameters and accurately control the start, stop and movement amplitude of each component through the wires to realize automatic control.

[0043] like Figures 2 to 8 As shown, vertical holes 30 are respectively opened on the surfaces of the adjustable horizontal cylinder 22, the guide outer cylinder 23, and the mounting side plate 24. Multiple soil-inserting vertical rods 25 are arranged horizontally at equal intervals. The insertion end of the vertical rod 31 is fixedly connected to a conical docking protrusion 32 that facilitates penetration through the inside and outside of multiple vertical holes 30. The targeted fertilization unit 1 is assembled in the planting greenhouse. The water pipe 11 is laid on the side of the plant roots in the planting greenhouse. The outlet position of the water pipe 11 can be adaptively adjusted according to the expansion diameter of the plant root system.

[0044] The above solution is adopted: the conical mating protrusion 32 is made of stainless steel, and the pointed tip design can reduce soil resistance during insertion and prevent the vertical insertion rod 31 from shifting during use.

[0045] Working principle and usage process of this invention:

[0046] First, the targeted fertilization unit 1 pumps liquid fertilizer through water pipe 11 via pump 10, and then drips the fertilizer through multiple drip irrigation heads 12. The water pipe 11 is laid along the plant row at the side of its roots. By controlling the pump 10, the liquid fertilizer can be delivered in a quantitative manner.

[0047] Subsequently, the pipeline installation unit 2 is responsible for supporting and adjusting the position of the water pipe 11. The water pipe 11 is fixed by multiple pairs of external clamps 20. The drip head 12 is located between each pair of external clamps 20. Each pair of external clamps 20 is connected to the adjustable horizontal cylinder 22 above through the connecting horizontal plate 21. The adjustable horizontal cylinder 22 is slidably sleeved in the guide outer cylinder 23. The lower end of the guide outer cylinder 23 is fixed to multiple soil-inserting vertical rods 25 through the installation side plate 24. The soil-inserting vertical rods 25 are inserted into the soil layer to securely install the entire equipment on the soil surface.

[0048] The limiting installation unit 3 is used to adjust the horizontal position of the drip irrigation head 12. When multiple drip irrigation heads 12 need to be limited and moved, the vertical insertion rods 31 are inserted into the vertical holes 30 on the adjustable horizontal cylinder 22 and the guide outer cylinder 23 in sequence. The conical joint protrusion 32 facilitates the insertion process. At the same time, the upper ends of the multiple vertical insertion rods 31 are connected into one piece by the horizontal connecting rod 33 for fixation. Conversely, when the horizontal connecting rod 33 is pulled, the adjustable horizontal cylinder 22 can be unlocked, so as to realize the coordinated position adjustment of the entire row of plants and adapt to the expansion of the plant root system.

[0049] When it is necessary to make independent adjustments for crops with different growth rates on the same pipeline, the mode switching unit 4 provides a separate control function. In the cooperative movement mode, the electromagnetic connecting block 43 is energized and magnetically attracted to the outer slider 41 of the bar, so that the guide outer cylinder 23 and the adjustable horizontal cylinder 22 are relatively fixed. At this time, the electric push rod 51 in the intelligent control drive unit 5 pushes the T-shaped linkage plate 52. The T-shaped linkage plate 52 drives the outer slider 41 of the outermost bar to move. The electromagnetic connecting block 43 and the horizontal node rod 44 are linked to each other, so that all pipeline sections in the connected state can be electrically displaced together, saving manpower for large-scale adjustments.

[0050] If a plant does not need to move with the whole plant, the electromagnetic connecting block 43 at the corresponding position is de-energized by the PLC controller built into the intelligent control drive unit 5, so that its magnetic connection with the outer slider 41 of the bar is disconnected. The outer guide cylinder 23 at this point is de-linked with the adjustable horizontal cylinder 22. At this time, the remaining pipe sections that are still connected can continue to move electrically and collaboratively through the electric push rod 51, while the disconnected single section remains in place or can be manually fine-tuned, thereby achieving precise matching of fertilization positions for plants with different growth conditions such as weak seedlings and strong seedlings.

[0051] Meanwhile, the electric push rod 53 in the intelligent control drive unit 5 is connected to the horizontal connecting rod 33 through the strip linkage rod 54, which can drive the vertical insertion rod 31 to rise and fall, realize the quick locking and release of the limit installation unit 3, and further facilitate the position adjustment operation. The device provides basic support and adjustment capability through the pipeline installation unit 2. Through the cooperation of the limit installation unit 3 and the mode switching unit 4, it realizes the flexible switching between the overall coordinated electric adjustment and the local independent manual adjustment of the horizontal position of the drip irrigation head 12. Combined with the centralized control of the intelligent control drive unit 5, it can make targeted and precise fertilization position adjustment for the uneven growth of crops in large-scale planting, effectively improving the targeting and operation efficiency of fertilization.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A targeted intelligent fertilization device for agricultural planting, comprising a targeted fertilization unit (1), characterized in that: The targeted fertilization unit (1) includes a pump (10), the output end of which is sealed with a water pipe (11), and the side end of the water pipe (11) is fixedly connected with multiple horizontally equidistant drip irrigation heads (12) for applying liquid fertilizer, and also includes: The pipeline installation unit (2) is set outside the pump (10). The pipeline installation unit (2) includes multiple pairs of external clamps (20) for limiting the water pipe (11) and sleeved outside the pump (10). The drip irrigation head (12) is located between two external clamps (20). A connecting horizontal plate (21) is fixedly connected to the upper side of the two external clamps (20) that are close to each other. An adjustable horizontal cylinder (22) is fixedly connected to the upper end of the connecting horizontal plate (21) to adjust the position of a pair of external clamps (20) directly below. A guide cylinder (23) is slidably connected to the outside of the adjustable horizontal cylinder (22). An installation side plate (24) is fixedly connected to the lower end of the guide cylinder (23). Multiple soil insertion vertical rods (25) for inserting into the soil layer for fixing are fixedly connected to the lower end of the installation side plate (24). The mode switching unit (4) is installed on the side plate (24) away from the pump (10). The mode switching unit (4) includes an extension bar (40), an outer slider (41) is slidably connected to the extension bar (40), an electromagnetic connecting block (43) is magnetically connected to the outer slider (41), and transverse node rods (44) are symmetrically fixed on both sides of the electromagnetic connecting block (43).

2. The targeted intelligent fertilization device for agricultural planting according to claim 1, characterized in that: It also includes a limiting installation unit (3), which is installed at the connection position of the adjustable horizontal cylinder (22) and the guide outer cylinder (23). The limiting installation unit (3) includes a vertical hole (30), and a vertical insertion rod (31) for limiting the adjustable horizontal cylinder (22) and the guide outer cylinder (23) is inserted between two vertically corresponding vertical holes (30). The upper ends of the multiple vertical insertion rods (31) are fixedly connected to a horizontal connecting rod (33).

3. The targeted intelligent fertilization device for agricultural planting according to claim 1, characterized in that: The sleeve end of the outer slider (41) of the bar is slidably connected to the outer side of the extension bar (40), and the top of the extension bar (40) and the end of the adjustable limit cylinder (22) are fixedly connected to each other.

4. The targeted intelligent fertilization device for agricultural planting according to claim 3, characterized in that: It also includes an intelligent control drive unit (5), which is installed at the drive of the limit installation unit (3) and the mode switching unit (4), and the intelligent control drive unit (5) includes a T-shaped mounting base plate (50).

5. The targeted intelligent fertilization device for agricultural planting according to claim 4, characterized in that: An electric push rod (51) is fixedly connected to the side end of the T-shaped mounting base plate (50). A T-shaped linkage plate (52) is provided at the output end of the electric push rod (51). The end of the T-shaped linkage plate (52) away from the electric push rod (51) is fixedly connected to the outer slider (41) of the outermost bar.

6. The targeted intelligent fertilization device for agricultural planting according to claim 5, characterized in that: The upper end of the T-shaped mounting base plate (50) is fixedly connected to an electric push rod two (53), and a strip linkage rod (54) is installed at the output end of the electric push rod two (53). The end of the strip linkage rod (54) away from the electric push rod two (53) is fixedly connected to the outermost end of the transverse connecting rod (33).

7. The targeted intelligent fertilization device for agricultural planting according to claim 6, characterized in that: The first electric push rod (51) has a built-in PLC controller, which is electrically connected to the first electric push rod (51), the second electric push rod (53), and multiple electromagnetic connecting blocks (43) via wires.

8. The targeted intelligent fertilization device for agricultural planting according to claim 2, characterized in that: The vertical holes (30) are respectively opened on the surfaces of the adjustable horizontal cylinder (22), the guide outer cylinder (23), and the mounting side plate (24), and the multiple soil-inserting vertical rods (25) are arranged horizontally at equal intervals.

9. The targeted intelligent fertilization device for agricultural planting according to claim 2, characterized in that: The insertion end of the vertical rod (31) is fixedly connected with a conical docking protrusion (32) that facilitates penetration through multiple vertical holes (30) inside and outside. The targeted fertilization unit (1) is assembled in the planting greenhouse.

10. The targeted intelligent fertilization device for agricultural planting according to claim 9, characterized in that: The water pipe (11) is laid on the side of the plant roots in the planting greenhouse. The outlet position of the water pipe (11) can be adaptively adjusted according to the expansion diameter of the plant roots.

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