Movable fertilization device utilizing self-control fertilization and use method thereof

Abstract

The invention relates to the technical field of mobile fertilization, and discloses a mobile fertilization device utilizing self-control fertilization and a use method thereof.The mobile fertilization device comprises a fertilizer mixing mechanism, a time sequence mechanism, a fertilization mechanism and a mobile trolley, the fertilizer mixing mechanism, the fertilization mechanism and the time sequence mechanism are all fixed to the mobile trolley, and the fertilization mechanism is connected with the fertilizer mixing mechanism; the fertilizing mechanism sprays mixed fertilizer into farmland, a stirring assembly is connected in the fertilizer mixing barrel, the grading hopper is vertically divided into a plurality of fertilizer storage cavities, gates are arranged at the bottoms of the fertilizer storage cavities, the timing mechanism comprises a cam shaft, a plurality of cams and a plurality of push rods, the cams are rotatably connected with the cam shaft, the cams are different in shape, and the push rods are connected with the cam shaft. The first ends of the multiple push rods are connected with the multiple cams in a one-to-one correspondence mode, the second ends of the multiple push rods are connected with the multiple gates in a one-to-one correspondence mode, the push rods convert rotary motion of the cams into linear motion of the gates, and the mixing degree of various fertilizers can be enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mobile fertilization, in particular to a mobile fertilization device using self-control fertilization and a use method thereof. BACKGROUND

[0002] Fertilization is an important agricultural technology measure, and soil is the basis for crop growth, and its fertility directly affects the growth and development of crops. Soil contains a certain amount of nutrients, which can provide basic chemical substances for plant growth. However, the supply of these nutrients in the soil is limited, and as crops are continuously planted and harvested, the nutrients in the soil are gradually consumed, resulting in a decrease in soil fertility, which in turn affects the quality and yield of crops. In order to make crops grow better, it is often necessary to fertilize them, and different types of fertilizers (such as nitrogen, phosphorus and potassium fertilizers) are mixed and then added to water to become water-soluble fertilizers, which are then delivered to crops by a fertilization device.

[0003] The existing fertilization device includes a fertilizer mixing barrel, a stirring assembly and a fertilization assembly. In use, multiple fertilizers are added to the fertilizer mixing barrel for stirring and mixing, and after mixing is completed, the fertilization is discharged from the fertilizer mixing barrel. However, this simultaneous mixing of multiple fertilizers can easily cause stratification or caking, making it difficult to mix evenly. SUMMARY

[0004] To solve the above technical problems, the present application provides a mobile fertilization device using self-control fertilization and a use method thereof, which can enhance the mixing effect of multiple fertilizers.

[0005] The present application provides a mobile fertilization device using self-control fertilization and a use method thereof, which includes a fertilizer mixing mechanism, a timing mechanism, a fertilization mechanism and a mobile trolley. The fertilizer mixing mechanism, the fertilization mechanism and the timing mechanism are all fixed to the mobile trolley. The fertilization mechanism is connected to the fertilizer mixing mechanism, and the fertilization mechanism sprays the mixed fertilizer into the farmland.

[0006] The fertilizer mixing mechanism includes a water injection assembly, a fertilizer mixing barrel and a grading hopper. The grading hopper is connected to the fertilizer mixing barrel. An inlet is formed in the upper part of the fertilizer mixing barrel. A stirring assembly is connected in the fertilizer mixing barrel. The grading hopper is vertically divided into multiple fertilizer storage cavities. The bottom of each fertilizer storage cavity is provided with a gate. The gate is slidably connected to the side wall of the grading hopper. The water injection assembly is connected to the fertilizer mixing barrel by a pipeline.

[0007] The timing mechanism includes a camshaft, multiple cams and multiple push rods. The multiple cams are rotatably connected to the camshaft. The multiple cams have different shapes. The first end of each push rod is connected to one of the multiple cams, and the second end of each push rod is connected to one of the multiple gates. The push rod converts the rotary motion of the cam into the linear motion of the gate.

[0008] Optionally, the plurality of cams are disc-shaped cams, and the plurality of cams are vertically arranged, and the plurality of cams are sequentially arranged from top to bottom as cam a, cam b and cam c, the remote rest angle of the cam c is greater than the remote rest angle of the cam b, the remote rest angle of the cam b is greater than the remote rest angle of the cam a, the base circle remote radius of the three cams is the same, and the strokes of the three cams are the same.

[0009] Optionally, the push rod further comprises a reset spring, and the reset spring is sleeved outside the push rod.

[0010] Optionally, the inner wall of the grading hopper is fixed with a chute corresponding to the gate, and the gate is slidingly connected in the chute.

[0011] Optionally, the fertilizer application assembly comprises a lifting pump and a plurality of spray heads, the suction end of the lifting pump extends into the fertilizer mixing barrel through a pipeline, the discharge end of the lifting pump is connected with the plurality of spray heads through a pipeline, and the spray heads are distributed at the rear of the mobile trolley.

[0012] Optionally, the stirring assembly comprises a stirring shaft and stirring paddles, the stirring shaft is rotationally connected to the central axis of the fertilizer mixing barrel, and the stirring paddles are uniformly distributed along the circumference of the stirring shaft.

[0013] Optionally, the stirring paddles comprise lower spiral paddles and upper scattering paddles, the scattering paddles comprise a plurality of inclined blades, and the inclined blades are arrayed along the circumference of the stirring shaft.

[0014] Optionally, the mobile trolley comprises a trolley frame and traveling wheels, the trolley frame is fixedly provided with a traction ring in front, the traveling wheels are rotationally connected below the trolley frame, and the traveling wheels are universal wheels.

[0015] Optionally, the mobile trolley further comprises a controller, and the controller is connected with the water injection assembly, the timing mechanism and the fertilizer application assembly.

[0016] A use method of a mobile fertilizer application device using automatic control fertilization, comprising the following steps:

[0017] Step one: different fertilizers are respectively placed in the fertilizer storage cavities, and the water injection assembly is started to inject water into the fertilizer mixing barrel;

[0018] Step two: the stirring assembly and the timing assembly are started, and the gates of the fertilizer storage cavities are controlled to be opened according to the predetermined timing sequence through the cams and the push rod;

[0019] Step three: the stirring assembly stirs the mixed fertilizer in sequence;

[0020] Step four: after the mixing is completed, the mobile device is moved to the fertilization area, and the fertilizer application assembly is started to apply fertilizer.

[0021] The technical scheme provided by the embodiment of the present application has the following advantages compared with the prior art: the present application controls the adding sequence and timing of various fertilizers through a timing mechanism. The present application comprises a grading hopper vertically separated into multiple independent fertilizer storage cavities, a fertilizer mixing barrel with a built-in stirring assembly, a water injection assembly and a fertilizing mechanism, wherein the cam timing mechanism is composed of a rotating cam shaft and a pre-installed cam and push rod, and the opening and closing timing of the gates of the fertilizer storage cavities is controlled through the cam profile. During operation, the cam sequentially pushes the push rod to open the corresponding gate, so that different fertilizers fall into the fertilizer mixing barrel in sequence, and the stirring assembly synchronously stirs to realize sequential and uniform mixing, and finally the fertilizing mechanism sprays to the farmland. The device realizes precise mixing of fertilizers through mechanical programmed control, avoids adverse reactions, and at the same time, the mobile trolley design supports flexible field operation, significantly improving the fertilizing efficiency and quality. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A front view of a mobile fertilizing device using self-controlled fertilization provided by the embodiment of the present application;

[0023] Figure 2 A side sectional view of a mobile fertilizing device using self-controlled fertilization provided by the embodiment of the present application;

[0024] Figure 3 A structural schematic view of a cam provided by the embodiment of the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 1, fertilizer mixing mechanism; 2, timing mechanism; 3, fertilizing mechanism; 4, mobile trolley; 11, water injection assembly; 12, fertilizer mixing barrel; 13, grading hopper; 131, fertilizer storage cavity; 132, gate; 121, inlet; 122, stirring assembly; 21, cam shaft; 22, cam; 23, push rod; 211, cam a; 212, cam b; 213, cam c; 133, chute; 24, spring; 31, booster pump; 32, spray head; 123, stirring shaft; 1242, propeller blade; 1243, dispersing paddle; 12431, inclined blade; 41, frame; 42, traveling wheel; 421, traction ring; 5, controller. DETAILED DESCRIPTION

[0027] One specific embodiment of the present application will be described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present application is not limited by the specific embodiment.

[0028] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the technical solutions of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] The present application will be described below through several specific embodiments. In order to keep the following description of the embodiments of the present application clear and concise, the detailed description of known functions and known components can be omitted. When any component of the embodiments of the present application appears in more than one figure, the component can be denoted by the same reference numeral in each figure.

[0030] Figure 1 A front view of a mobile fertilizer application device using self-controlled fertilization provided for the embodiments of the present application, Figure 2 A side sectional view of a mobile fertilizer application device using self-controlled fertilization provided for the embodiments of the present application, Figure 3 A structural schematic view of a cam provided for the embodiments of the present application.

[0031] As Figure 1 shown, the embodiments of the present application provide a mobile fertilizer application device using self-controlled fertilization and a method of using the same, which comprises a fertilizer mixing mechanism 1, a timing mechanism 2, a fertilizer application mechanism 3 and a mobile trolley 4, the fertilizer mixing mechanism 1, the fertilizer application mechanism 3 and the timing mechanism 2 are all fixed on the mobile trolley 4, the fertilizer application mechanism 3 is connected with the fertilizer mixing mechanism 1, and the fertilizer application mechanism 3 sprays the mixed fertilizer into farmland; the fertilizer mixing mechanism 1 comprises a water injection assembly 11, a fertilizer mixing barrel 12 and a grading hopper 13, the grading hopper 13 is connected with the fertilizer mixing barrel 12, a feeding port 121 is formed at the top of the fertilizer mixing barrel 12, a stirring assembly 122 is connected in the fertilizer mixing barrel 12, the grading hopper 13 is vertically divided into a plurality of fertilizer storage cavities 131, a gate 132 is arranged at the bottom of each of the plurality of fertilizer storage cavities 131, the gate 132 is slidably connected with the side wall of the grading hopper 13, and the water injection assembly 11 is connected with the fertilizer mixing barrel 12 through a pipeline; the timing mechanism 2 comprises a cam shaft 21, a plurality of cams 22 and a plurality of push rods 23, the plurality of cams 22 are rotatably connected with the cam shaft 21, the plurality of cams 22 are different in shape, the first ends of the plurality of push rods 23 are connected with the plurality of cams 22 one by one, the second ends of the plurality of push rods 23 are connected with the plurality of gates 132 one by one, and the push rod 23 converts the rotary motion of the cam 22 into the linear motion of the gate 132.

[0032] Specifically, the cam 22 is connected with the cam shaft 21 through the spline, and the water injection assembly 11 pumps the water from the external water source into the fertilizer mixing barrel 12 through the water pump.

[0033] The application integrates the fertilizer mixing mechanism 1, the timing mechanism 2 and the fertilizer application mechanism 3 on the mobile trolley 4, realizes the automatic, timing mixing and precise application of the fertilizer. The core fertilizer mixing mechanism 1 is composed of a water injection assembly 11, a fertilizer mixing barrel 12 and a grading hopper 13. The grading hopper 13 is vertically divided into a plurality of independent fertilizer storage cavities 131 for storing different kinds or proportions of fertilizer raw materials (such as base fertilizer, top dressing, trace elements, etc.). Each fertilizer storage cavity 131 is provided with a gate 132 which can move along the sidewall sliding rail at the bottom, for controlling the release of the fertilizer. The fertilizer mixing barrel 12 is located below the grading hopper 13, and is provided with a material inlet 121 at the top for receiving the falling fertilizer. An agitating assembly 122 is installed in the barrel to prevent the fertilizer from settling at the bottom and promote mixing. The water injection assembly 11 is connected to the fertilizer mixing barrel 12 through a pipeline to provide the required water for mixing. The fertilizer application mechanism 3 is directly connected to the fertilizer mixing barrel 12, and is responsible for spraying the uniformly mixed fertilizer solution to the farmland. The timing mechanism 2 is composed of a camshaft 21, a plurality of disc-shaped cams 22 with different shapes, and a corresponding number of push rods 23. These cams 22 are fixedly installed on the rotating camshaft 21 according to the preset phase angle, and their unique profile curve controls the sequence and timing of the addition of the fertilizer. During operation, the power source drives the camshaft 21 to rotate at a constant speed, and at the same time the agitating assembly 122 is started. As the camshaft 21 rotates, the unique profile of each cam 22 pushes its corresponding push rod 23 to move linearly. The one end of the push rod 23 is usually provided with a roller, which is in rolling contact with the cam 22, significantly reducing the movement friction and wear. The other end of the push rod 23 drives the gate 132 at the bottom of the corresponding fertilizer storage cavity 131 of the grading hopper 13 to slide along the sliding rail through a lever or a direct connection mechanism. The specific working process is as follows: when the first cam 22 (corresponding to the first kind of fertilizer) rotates to its protruding part (pushing section), it pushes its push rod 23, thereby pulling open the gate 132 of the first layer of fertilizer storage cavities 131. At this time, the base fertilizer preloaded in the cavity falls into the fertilizer mixing barrel 12 through the material inlet 121 under the action of gravity. At the same time, the agitating assembly 122 has started to operate, and preliminarily mixes the falling fertilizer and water to prevent settling and caking. As the camshaft 21 continues to rotate, when the second cam 22 (corresponding to the second kind of fertilizer) reaches its preset pushing angle, its corresponding push rod 23 is pushed to pull open the second layer of gates 132, and the second kind of fertilizer falls into the fertilizer mixing barrel 12. The agitating assembly 122 continues to stir strongly to promote the rapid diffusion of the newly added fertilizer and the full integration with the existing mixture in the barrel. The subsequent cams 22 act strictly according to the preset phase angle to push their respective push rods 23, open the corresponding gates 132 at the precise set time interval and sequence, and make different kinds of fertilizers added to the fertilizer mixing barrel 12 in turn and in order. After all the fertilizers are added in the predetermined order, the agitating assembly 122 continues to work for 2-3 minutes for final homogenization mixing to ensure that the fertilizer solution reaches the best mixing uniformity. After the mixing is completed, the operator starts the fertilizer application assembly, and the fertilizer is uniformly sprayed into the farmland.The whole device is installed on a mobile trolley 4 with moving wheels, which can be easily pushed to different areas in the field by the operator, realizing flexible and efficient precision fertilization operation. The cam 22 timing mechanism 2 is the core advantage of the device. By setting the phase angle of the cam 22 of different shapes, the addition sequence, timing and duration (gate opening speed and amplitude) of various fertilizers can be controlled. The fertilizers are added in the optimal formula sequence to avoid adverse chemical reactions. The fertilizers have sufficient mixing time window, and the stirring assembly 122 can intervene at the best time to greatly improve the mixing uniformity, overcoming the shortcomings of manual or simple mechanical addition that cannot guarantee the timing accuracy and consistency. The mixing quality is stable and reliable, and the fertilizer efficiency is significantly improved. Through the precisely designed cam 22 timing mechanism 2, mechanical programmed precise control of the addition sequence, timing and duration of various fertilizers is realized, ensuring optimal mixing effect; at the same time, the stirring assembly 122 is driven to work synchronously, adding and stirring at the same time, greatly improving the efficiency and preventing bottoming. Combined with the design of the mobile platform, it can be moved flexibly in the field to realize spot fertilization with mixing and application.

[0034] Optionally, referring to Figure 3 , the plurality of cams 22 are disc-shaped cams 22, and the plurality of cams 22 are vertically arranged, from top to bottom, as cam a 211, cam b 212 and cam c 213. The remote rest angle of cam c 213 is greater than that of cam b 212, and the remote rest angle of cam b 212 is greater than that of cam a 211. The base circle remote radius of the three cams 22 is the same, and the stroke is the same.

[0035] The cam a 211 has the largest remote rest angle, and the corresponding low-position push rod 23 remains for the longest time, ensuring that the base fertilizer falling from the upper fertilizer storage cavity 131 can pass through the low-position gate 132. The base circle remote radius of the cam 22 is the same, and the stroke is the same, ensuring that the opening amplitude of each gate 132 is consistent, avoiding fertilizer blockage or leakage, and at the same time maintaining the stability of the mechanical structure.

[0036] Optionally, referring to Figure 1 , the push rod 23 further comprises a return spring 24, and the return spring 24 is sleeved outside the push rod 23.

[0037] Specifically, the two ends of the return spring 24 abut against the flange of the push rod 23 and the stepped hopper 13, respectively.

[0038] The reset spring 24 sleeved outside the push rod 23 can ensure that the gate 132 is quickly and stably reset and closed when the cam 22 returns, avoiding the gate 132 from being stuck due to inertia or friction, thereby ensuring the accuracy and reliability of the fertilizer adding timing. The elastic force of the reset spring 24 can be adaptively adjusted, which can effectively offset the movement resistance of the push rod 23 and reduce the impact and wear between the cam 22 and the push rod 23, thereby prolonging the service life of the mechanism. The design further improves the response speed and action consistency of the system, ensures that different fertilizers are accurately added in strict accordance with the set order and time, and enhances the stability and environmental adaptability of the mechanical structure.

[0039] The embodiment of the present application provides a sliding connection mode of the gate 132.

[0040] Optionally, referring to Figure 2 The inner wall of the grading hopper 13 is fixed with a chute 133 corresponding to the gate 132, and the gate 132 is slidingly connected in the chute.

[0041] The chute 133 arranged on the inner wall of the grading hopper 13 forms a precise sliding pair with the gate 132, ensuring that the gate 132 is stably opened and closed along a predetermined trajectory under the drive of the push rod 23, completely avoiding the risk of lateral deviation or sticking. The structure of the chute 133 can not only bear the vertical load of the gate 132 and the fertilizer, but also ensure the movement accuracy through lateral constraint, so that the fertilizer adding amount control is more accurate and reliable. The design significantly improves the stability and durability of the action of the gate 132, is particularly suitable for long-term high-frequency operation, and simplifies the maintenance requirements.

[0042] Optionally, referring to Figure 1 The fertilizer adding mechanism 3 includes a lifting pump 31 and a plurality of spray heads 32. The suction end of the lifting pump 31 extends into the fertilizer mixing barrel 12 through a pipeline, and the discharge end is connected with the plurality of spray heads 32 through a pipeline. The spray heads 32 are distributed at the rear of the mobile trolley 4.

[0043] Specifically, the suction end of the lifting pump 31 is connected with an anti-blocking filter screen to prevent un-decomposed fertilizer from blocking the filter screen.

[0044] The fertilizer solution in the fertilizer mixing barrel 12 is delivered to the plurality of spray heads 32 arranged at the tail of the vehicle through the corrosion-resistant lifting pump 31, and the stable fertilization under the terrain difference is realized by cooperating with the 80-mesh anti-blocking filter screen and the pressure compensation device. The fluid mechanics optimized spray head spacing ensures the irrigation overlap rate, improves the utilization rate of the mixed solution, and saves fertilizer compared with the traditional method. The rear-mounted spray head layout is intelligently matched with the vehicle speed, and supports quick switching between fan-shaped and conical spray modes.

[0045] Optionally, referring to Figure 2 The stirring assembly 122 includes a stirring shaft 123 and stirring paddles. The stirring shaft 123 is rotationally connected to the central axis of the fertilizer mixing barrel, and the stirring paddles are uniformly distributed in the circumferential direction of the stirring shaft 123.

[0046] Optionally, referring to Figure 2 The stirring paddle comprises a lower helical paddle 1242 and an upper dispersing paddle 1243. The dispersing paddle 1243 comprises a plurality of inclined blades 12431 arranged in a circumferential array along the stirring shaft 123.

[0047] The stirring assembly 122 adopts a layered paddle design. The lower helical paddle 1242 forms an axial circulating flow, and the inclined blades 12431 of the upper dispersing paddle 1243 efficiently break up the lumps to achieve three-dimensional mixing. Compared with the traditional single paddle, this combined stirring structure improves the mixing efficiency and reduces the power consumption, and is particularly suitable for fertilizer solutions with varying viscosities. The circumferentially uniform paddle layout ensures that there are no stirring dead zones in the fertilizer mixing barrel 12, and the center axis arrangement of the stirring shaft 123 makes the equipment run more smoothly, with significantly reduced vibration and noise.

[0048] Optionally, referring to Figure 1 The mobile trolley 4 comprises a trolley frame 41 and traveling wheels 42. The trolley frame 41 is fixed with a traction ring 421 in front, and the traveling wheels 42 are rotatably connected to the lower part of the trolley frame 41. The traveling wheels 42 are universal wheels.

[0049] The mobile trolley adopts a modular design, with universal traveling wheels 42 arranged below the trolley frame 41, and a front traction ring 421 structure, achieving flexible movement and multi-mode traction in the field. The universal wheels use high-strength nylon hubs with non-slip rubber treads, supporting 360° free steering and adapting to various complex terrains such as ridges and slopes. The traction ring 421 welded to the front of the trolley frame 41 can be quickly connected to a tractor for mechanical traction, or operated manually by a pull rod. This design reduces the overall moving resistance while ensuring driving stability at the working speed.

[0050] Optionally, referring to Figure 1 It also comprises a controller 5 connected with the water injection assembly 11, the timing mechanism 2 and the fertilizer application assembly.

[0051] The controller 5 realizes centralized management of the water injection assembly 11, the timing mechanism 2 and the fertilizer application assembly. The controller 5 adopts a modular design and can coordinate the operation timing of the three core systems: automatically adjust the water injection amount according to the preset formula, control the camshaft 21 speed and synchronize the fertilizer pump pressure. It provides a multi-language human-machine interface, supports formula storage, operation record export and other extended functions, and can realize remote monitoring through the optional 4G module.

[0052] A use method of a mobile fertilizer application device using automatic control fertilization, comprising the following steps:

[0053] Step one: Put different fertilizers into the fertilizer storage cavity 131 respectively, start the water injection assembly 11, and inject water into the fertilizer mixing barrel 12;

[0054] Step two: start the stirring assembly 122 and timing assembly, through the cam 22 and push rod 23, control each storage cavity 131 gate 132 according to the predetermined timing sequence opening;

[0055] Step three: stirring assembly 122 according to the sequence of stirring mixed fertilizer;

[0056] Step four: after the completion of the mixture, the moving device to the fertilization area, the fertilizer assembly start to fertilize.

[0057] The above invention is only a few specific embodiments of the present application, but the present application is not limited to this, any person skilled in the art can think of the changes should fall within the scope of the present application.

Claims

1. A mobile fertilization device utilizing self-controlled fertilization, comprising: The fertilizer mixing mechanism (1), the timing mechanism (2), the fertilizer application mechanism (3) and the mobile trolley (4) are all fixed on the mobile trolley (4). The fertilizer application mechanism (3) is connected to the fertilizer mixing mechanism (1). The fertilizer application mechanism (3) sprays the mixed fertilizer into the farmland. The fertilizer mixing mechanism (1) includes: a water injection component (11), a fertilizer mixing tank (12), and a grading hopper (13). The grading hopper (13) is connected to the fertilizer mixing tank (12). An inlet (121) is provided on the top of the fertilizer mixing tank (12). A stirring component (122) is connected inside the fertilizer mixing tank (12). The grading hopper (13) is vertically divided into multiple fertilizer storage chambers (131). A gate (132) is provided at the bottom of the multiple fertilizer storage chambers (131). The gate (132) is slidably connected to the side wall of the grading hopper (13). The water injection component (11) is connected to the fertilizer mixing tank (12) through a pipe. The timing mechanism (2) includes: a camshaft (21), multiple cams (22) and multiple push rods (23). The multiple cams (22) are rotatably connected to the camshaft (21). The multiple cams (22) have different shapes. The first end of the multiple push rods (23) is connected to the multiple cams (22) one by one, and the second end is connected to the multiple gates (132) one by one. The push rods (23) convert the rotational motion of the cams (22) into the linear motion of the gates (132).

2. The mobile fertilization device utilizing self-controlled fertilization as described in claim 1, characterized in that, The multiple cams (22) are disc-shaped cams (22), and the multiple cams (22) are arranged vertically, from top to bottom as follows: cam a (211), cam b (212) and cam c (213). The far repose angle of cam c (211) is greater than that of cam b (212), and the far repose angle of cam b (212) is greater than that of cam a (213). The base circle far radius of the three cams (22) is the same, and the stroke is the same.

3. The mobile fertilization device utilizing self-controlled fertilization as described in claim 1, characterized in that, The push rod (23) also includes a return spring (24), which is sleeved on the outside of the push rod (23).

4. The mobile fertilization device utilizing self-controlled fertilization as described in claim 1, characterized in that, The inner wall of the grading hopper (13) is fixed with a sliding groove (133) corresponding to the gate (132), and the gate (132) is slidably connected in the sliding groove.

5. The mobile fertilization device utilizing self-controlled fertilization as described in claim 1, characterized in that, The fertilization mechanism (3) includes a booster pump (31) and multiple nozzles (32). The suction end of the booster pump (31) extends into the fertilizer mixing tank (12) through a pipe, and the discharge end is connected to multiple nozzles (32) through a pipe. The nozzles (32) are distributed behind the mobile trolley (4).

6. The mobile fertilization device utilizing self-controlled fertilization as described in claim 1, characterized in that, The stirring assembly (122) includes a stirring shaft (123) and stirring blades. The stirring shaft (123) is rotatably connected to the central axis of the fertilizer mixing tank (12), and the stirring blades are evenly distributed around the stirring shaft (123).

7. The mobile fertilization device utilizing self-controlled fertilization as described in claim 6, characterized in that, The stirring blades include a lower propeller blade (1242) and an upper dispersing blade (1243). The dispersing blade (1243) includes a plurality of inclined blades (12431) which are arranged in a circumferential array along the stirring shaft (123).

8. The mobile fertilization device utilizing self-controlled fertilization as described in claim 1, characterized in that, The mobile trolley (4) includes a frame (41) and wheels (42). A traction ring (421) is fixed in front of the frame (41), and the wheels (42) are rotatably connected to the bottom of the frame (41). The wheels (42) are omnidirectional wheels.

9. The mobile fertilization device utilizing self-controlled fertilization as described in claim 1, characterized in that, The system also includes a controller (5) connected to the water injection assembly (11), the timing mechanism (2), and the fertilizer application assembly.

10. The method of using the mobile fertilization device with self-controlled fertilization as described in claim 1, characterized in that, Includes the following steps: Step 1: Place different fertilizers into the fertilizer storage chamber (131) respectively, start the water injection component (11) to inject water into the fertilizer mixing tank (12); Step 2: Start the stirring assembly (122) and timing assembly, and control the gates (132) of each fertilizer storage chamber (131) to open in a predetermined sequence through the cam (22) and push rod (23); Step 3: Use the mixing component (122) to mix the fertilizer in sequence; Step 4: After mixing, move the device to the fertilization area and start the fertilization component to apply fertilizer.

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