Plant liquid fertilizer application device and method of application thereof

Abstract

This invention relates to the field of liquid fertilizer application equipment, specifically to a plant liquid fertilizer application device and method, comprising a walking unit, a liquid fertilizer tank, two separation units, a folding lifting mechanism, and a separation drive structure. Each separation unit includes a push plate, a lateral guide structure, a rotating structure, a flexible push structure, and a liquid fertilizer tube. The lateral guide structure guides the push plate from the trench to the ridge, the rotating structure drives the push plate to rotate vertically and horizontally, the flexible push plate separates the runners adhering to the ridge surface from the soil, and the liquid fertilizer tube is connected to the liquid fertilizer tank. The folding lifting mechanism folds and drives the two separation units to move vertically up and down. The separation drive structure drives the flexible push structure to apply a pushing force to the runners. By setting up two separation units, a folding lifting mechanism, and a separation drive structure, this invention ensures that the runners are separated from the soil while minimizing mechanical damage to the runners.

Description

Technical Field

[0001] This invention application relates to the field of liquid fertilizer application equipment, specifically to a liquid fertilizer application device for plants, and also to a fertilization method. Background Technology

[0002] In agricultural planting, especially in the cultivation of crops with runners such as strawberries and sweet potatoes, liquid fertilizer application is a crucial step in ensuring crop growth and increasing yield. During the growth period of these crops, the runners often grow close to the surface soil of the field ridges, and some plants may also lodging due to field management or natural factors, posing many challenges to fertilization operations.

[0003] Patent CN116897815A discloses a high-efficiency liquid fertilizer application device. Its working principle is as follows: a patrol unit drives the device along the furrows between the ridges. When it reaches the fertilization position, a rotating unit drives a balance plate to rotate 90 degrees, making the long side of the balance plate perpendicular to the direction of travel. Then, an electric rotating plate rotates off the balance plate and pushes up the crops lying in the furrows, lifting them to avoid the fertilization area. Next, a pushing unit pushes the fertilizer delivery pipe, fertilizer head, and cone towards the ridge. The cone first contacts the soil of the ridge, and the liquid fertilizer tank then... The conduit, diversion pipe, and second conduit transport liquid fertilizer to the fertilizer delivery pipe, and then through the hollow trough and transfer port of the bursting pipe into the fertilizer application chamber of the fertilizer head. The liquid fertilizer is sprayed onto the surface of the field ridge to soften the soil. As the pushing unit continues to advance, the cone and fertilizer head penetrate deep into the soil of the field ridge, and the fertilizer head continuously sprays liquid fertilizer to achieve fertilization of soil at different depths of the field ridge. At the same time, the bursting pipe can adjust the liquid fertilizer flow rate according to the deformation of soil resistance, and the sealing plug in the cone can also prevent soil from clogging the fertilizer delivery trough. After fertilization is completed, the electric rotating plate and pushing unit reset, and the device enters the next operation cycle.

[0004] While the above solutions address the issues of lodged plants affecting fertilization efficiency and deep soil fertilization, for creeping crops (such as strawberry and watermelon seedlings), the stems and vines tend to lie flat against the surface of the ridges after lodging, potentially extending into the furrows. In these solutions, the electric rotating plate rotates from bottom to top, concentrating its effect on the upper and middle parts of the ridge side slope. The creeping stems and vines, clinging to the ridge surface, are in a blind spot below the electric rotating plate and cannot be effectively moved. Furthermore, the hard contact between the electric rotating plate and the plant can easily damage the plant. Summary of the Invention

[0005] To address the aforementioned issues, a liquid fertilizer application device for plants is provided. By incorporating two separation units, a folding lifting mechanism, and a separation drive structure, the device ensures that the stolons are separated from the soil while minimizing mechanical damage to the stolons, significantly reducing the probability of stolon breakage, and ensuring the complete growth of the plant.

[0006] To address the problems of existing technologies, this invention provides a plant liquid fertilizer application device, including a walking unit and a liquid fertilizer tank for providing liquid fertilizer, as well as two separation units, a folding and lifting mechanism, and a separation drive structure. The two separation units are horizontally symmetrically arranged about the forward direction of the walking unit. Each separation unit includes a push plate, a lateral guide structure, a rotating structure, a flexible pushing structure, and a liquid fertilizer pipe. The push plate is vertically arranged and used to lift up fallen plants. The lateral guide structure guides the push plate from the ditch to the ridge. The rotating structure drives the push plate to rotate within a vertical and horizontal range. The flexible pushing structure is located on the side of the push plate facing the fallen plants and is used to separate the runners adhering to the surface of the ridge from the soil. The liquid fertilizer pipe is located on the other side of the push plate, with one end connected to the liquid fertilizer tank. The folding and lifting mechanism is located on the walking unit and is used to fold the two separation units and drive them to rise and fall vertically. The separation drive structure is connected to the two flexible pushing structures and drives them to apply a pushing force to the runners.

[0007] Preferably, the flexible push structure includes a flexible push plate and a first lifting structure; the flexible push plate is arranged parallel to one side of the push plate, and the lower end of the flexible push plate has flexible push teeth; the first lifting structure is arranged on the push plate and is used to drive the flexible push plate to move up and down along the surface of the push plate.

[0008] Preferably, the flexible push structure further includes a pressure sensor and a buffer structure; the pressure sensor is disposed between the flexible push plate and the push plate to detect the resistance encountered by the flexible push plate during its movement; the buffer structure is disposed between the flexible push plate and the first lifting structure to reduce the resistance encountered by the flexible push plate on the push plate.

[0009] Preferably, the upper end of the flexible lever is provided with a sub-plate structure, which includes a flexible baffle and a connecting block; the lower end of the flexible baffle is connected to the upper end of the flexible lever by a hinge; the connecting block is slidably connected to the push plate, and the connecting block is hinged to the upper end of the flexible baffle.

[0010] Preferably, the sub-plate structure further includes two reset structures, which are respectively disposed on both sides of the push plate and connected to the two ends of the two connecting blocks.

[0011] Preferably, the transverse guide structure includes a support arm, a first slider, and a guide assembly; one end of the support arm is connected to the folding and lifting mechanism; the first slider is movably mounted on the support arm and is hinged to the push plate; the guide assembly is mounted on the support arm and connected to the first slider, and is used to guide the first slider to move along the length direction of the support arm.

[0012] Preferably, the rotating structure includes a bracket, a first linear actuator, and a connecting plate; one end of the bracket is hinged to the transverse guide structure; the first linear actuator is mounted on the bracket; the connecting plate is mounted on the push plate, and the connecting plate is hinged to the output end of the first linear actuator.

[0013] Preferably, the folding and lifting mechanism includes a folding structure and a second lifting structure; the folding structure is connected to two disengagement units and switches the disengagement units between a horizontal state and a vertical state; the second lifting structure is used to drive the two disengagement units to move up and down in the vertical direction.

[0014] Preferably, the deflection drive structure includes two pneumatic drive units and an air supply unit; the two pneumatic drive units are respectively disposed on the two deflection units, and the pneumatic drive units are connected to the flexible deflection structure; the air supply unit is connected to the two pneumatic drive units.

[0015] A fertilization method, applied to a liquid fertilizer applicator for plants, includes the following steps:

[0016] S1. The walking unit moves along the length of the trench. When there is a creeping stem in front of the walking unit, the folding and lifting mechanism lowers the two separation units and unfolds them to a horizontal state.

[0017] S2. The push-off drive structure drives the flexible push-off structure to move along the guide direction of the transverse guide structure through the push plate, and the flexible push-off structure pushes the stolon to separate from the ground;

[0018] S3. When the pusher plate and flexible pusher structure move to the side of the field ridge, the rotating structure will rotate the pusher plate from a vertical state to a horizontal state, and lift the fallen plants up.

[0019] S4. The liquid fertilizer in the liquid fertilizer tank is sprayed onto the roots of the plant through the liquid fertilizer tube.

[0020] The advantages of this invention application compared to the prior art are:

[0021] 1. This invention application provides two separation units, a folding lifting mechanism, and a separation drive structure. The folding lifting mechanism first releases the constraints of the separation units, lowers them, and unfolds them to the appropriate position. Subsequently, the separation drive structure drives the push plate and the flexible push structure to move along the transverse guide structure, allowing the flexible push structure to insert into the soil. Upon contact with the stolon, separation is achieved through a gentle reciprocating drive. By using a gentle reciprocating drive method in conjunction with the flexible push structure, compared to traditional rigid separation components, it can effectively avoid causing hard impacts to the stolon, thereby ensuring that the stolon is separated from the soil while minimizing mechanical damage to the stolon, significantly reducing the probability of stolon breakage, and ensuring the complete growth state of the plant.

[0022] 2. This invention application provides a flexible push plate and a first lifting structure. When the push plate is in a vertical state, the first lifting structure applies a stable downward pushing force to the slide plate. The slide plate drives the flexible push plate to move down synchronously, so that the flexible push teeth gradually extend and insert into the soil below the surface of the trench. The depth of insertion of the flexible push teeth into the soil can be adjusted according to the depth of the trench, so that the flexible push plate can adapt to trenches of different depths.

[0023] 3. This invention application includes a pressure sensor and a buffer structure. When the teeth of the flexible push plate contact the creeping stem and are subjected to reverse resistance, the resistance is transmitted to the buffer structure through the flexible push plate. The buffer structure absorbs the energy of the reverse force, converting the rigid impact into flexible buffering, thus preventing the resistance from being directly transmitted to the slide plate and push plate. The pressure sensor monitors the magnitude of the resistance received by the flexible push plate in real time, thereby achieving dual protection of buffering and speed regulation during the movement of the creeping stem by the flexible push structure. Attached Figure Description

[0024] Figure 1 This is a perspective view of a plant liquid fertilizer application device according to the present invention.

[0025] Figure 2 This is a perspective view of the separating unit, folding structure, pneumatic drive unit, and air supply unit in a plant liquid fertilizer application device according to this invention application.

[0026] Figure 3 This is a three-dimensional sectional view of the separating unit, folding structure, pneumatic drive unit, and air supply unit in a plant liquid fertilizer application device according to this invention application.

[0027] Figure 4 This is a perspective view of the push plate, flexible deflector, first lifting structure, buffer structure, and secondary plate structure in a plant liquid fertilizer application device according to this invention application.

[0028] Figure 5 This is a perspective view of the push plate, the first lifting structure, and the buffer structure in a plant liquid fertilizer application device according to this invention application.

[0029] Figure 6 This is a perspective view of the push plate, flexible deflector, flexible baffle, connecting block, and reset structure in a plant liquid fertilizer application device according to this invention application.

[0030] Figure 7 This is a perspective view of the flexible baffle, connecting block, and reset structure in a plant liquid fertilizer application device according to this invention application.

[0031] Figure 8 This is a perspective view of the push plate, support arm, first slider, guide assembly, and rotating structure in a plant liquid fertilizer application device according to this invention application.

[0032] Figure 9This is a perspective view of the first slider, first guide rod, first spring, bracket, first linear driver, and connecting plate in a plant liquid fertilizer application device according to this invention application.

[0033] Figure 10 This is a perspective view of the support arm, folding structure, second lifting structure, pneumatic drive unit, and air supply unit in a plant liquid fertilizer application device according to this invention application.

[0034] Figure 11 This is a perspective view of the support arm, folding structure, and second lifting structure in a plant liquid fertilizer application device according to this invention application.

[0035] Figure 12 This is a perspective view of the guide cylinder, third slider, driving airbag, and air duct in a plant liquid fertilizer application device according to this invention application.

[0036] The diagram is labeled as follows: 1. Walking unit; 2. Liquid fertilizer tank; 3. Disengagement unit; 31. Push plate; 32. Lateral guide structure; 321. Support arm; 322. First slider; 323. Guide assembly; 3231. First guide rod; 3232. First spring; 33. Rotation structure; 331. Bracket; 332. First linear actuator; 333. Connecting plate; 34. Flexible push structure; 341. Flexible push plate; 342. First lifting structure; 3421. Second guide rod; 3422. Slide plate; 3423. Second linear actuator; 343. Pressure sensor; 344. Buffer structure; 3441. Mounting plate; 3442. Third guide rod; 3 443. Second spring; 35. Liquid fertilizer pipe; 36. Sub-plate structure; 361. Flexible baffle; 362. Connecting block; 363. Reset structure; 3631. Fourth guide rod; 3632. Second slider; 3633. Third spring; 4. Folding lifting mechanism; 41. Folding structure; 411. Lifting plate; 412. Rotating shaft; 413. Gear set; 414. Worm gear drive assembly; 42. Second lifting structure; 421. Fifth guide rod; 422. Lifting driver; 5. Disengagement drive structure; 51. Pneumatic drive unit; 511. Guide cylinder; 512. Third slider; 513. Drive airbag; 52. Air supply unit; 521. Air pipe. Detailed Implementation

[0037] To further understand the features, technical means, and specific objectives and functions achieved by this invention application, the invention application will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0038] Reference Figures 1 to 12As shown: A liquid fertilizer application device for plants includes a walking unit 1 and a liquid fertilizer tank 2 for providing liquid fertilizer, as well as two disengagement units 3, a folding lifting mechanism 4, and a disengagement drive structure 5. The two disengagement units 3 are arranged horizontally symmetrically about the forward direction of the walking unit 1. Each disengagement unit 3 includes a push plate 31, a lateral guide structure 32, a rotating structure 33, a flexible pushing structure 34, and a liquid fertilizer pipe 35. The push plate 31 is vertically arranged and used to lift up fallen plants. The lateral guide structure 32 guides the push plate 31 from the ditch to the ridge. The rotating structure 33 drives the push plate 31. 1. The flexible pusher structure 34 is located on the side of the pusher plate 31 facing the fallen plant. The flexible pusher plate 341 is used to separate the runners that are close to the surface of the ridge from the soil. The liquid fertilizer pipe 35 is located on the other side of the pusher plate 31, and one end of it is connected to the liquid fertilizer tank 2. The folding lifting mechanism 4 is located on the walking unit 1. The folding lifting mechanism 4 is used to fold the two separation units 3 and drive the two separation units 3 to rise and fall in the vertical direction. The separation driving structure 5 is connected to the two flexible pusher structures 34 and drives the flexible pusher structures 34 to apply a pushing force to the runners.

[0039] The walking unit 1 is activated, allowing it to move smoothly along the length of the ditch. When the device reaches the area where creeping stems appear on the ridge, the folding and lifting mechanism 4 first releases the folding constraints on the two disengaging units 3, then simultaneously lowers the two disengaging units 3 to a position suitable for the height of the ridge. Finally, the disengaging units 3 are unfolded to a horizontal state. At this time, the two vertical push plates 31 correspond to the ridges on both sides of the ditch. Next, the disengaging drive structure 5 starts working, driving the push plates 31 to move slowly along the preset guide direction (from the ditch to the ridge) of the transverse guide structure 32. The flexible pushing structure 34 on the inner side of the push plate 31 moves synchronously with the push plate 31, and its lower end smoothly inserts into the soil below the surface of the ridge during the movement. When the flexible pushing structure 34 moves to contact the creeping stems, the disengaging drive structure 5 drives the flexible pushing structure 34 to move back and forth at the contact position. By gently applying pushing force multiple times, the creeping stems that are close to the surface of the ridge are gradually disengaged. The stolons are separated from the soil to avoid breakage due to excessive force. When the push plate 31 and the flexible pushing structure 34 move to the preset position beside the ridge, the rotating structure 33 is activated. The rotating structure 33 is connected to the push plate 31, driving the push plate 31 to slowly rotate from a vertical position to a horizontal position. During the rotation, the push plate 31 smoothly supports the fallen plants and lifts them up, so that the plant roots are fully exposed on the ridge surface. At this time, the liquid fertilizer tank 2's delivery system is activated simultaneously, and the liquid fertilizer... The liquid fertilizer in the fertilizer tank 2 is sprayed onto the exposed roots of the plant through the connected liquid fertilizer pipe 35 to complete the fertilization operation. By using a flexible push structure 34 in conjunction with a gentle reciprocating drive structure 5, compared with traditional rigid separation components, it can effectively avoid hard impact on the stolon, thereby ensuring that the stolon is separated from the soil while minimizing mechanical damage to the stolon, significantly reducing the probability of stolon breakage, and ensuring the complete growth of the plant.

[0040] Reference Figure 3 , Figure 4 and Figure 5 As shown: The flexible push structure 34 includes a flexible push plate 341 and a first lifting structure 342; the flexible push plate 341 is arranged parallel to one side of the push plate 31, and the lower end of the flexible push plate 341 has flexible push teeth; the first lifting structure 342 is arranged on the push plate 31 and is used to drive the flexible push plate 341 to move up and down along the surface of the push plate 31.

[0041] Specifically, the first lifting structure 342 includes multiple second guide rods 3421, a sliding plate 3422, and a second linear actuator 3423. The multiple second guide rods 3421 are parallel to each other and are vertically arranged along the surface of the push plate 31. The sliding plate 3422 is slidably connected to the multiple second guide rods 3421 and is connected to the flexible lever 341. The second linear actuator 3423 is arranged on the push plate 31 and its output end is connected to the sliding plate 3422.

[0042] When the push plate 31 rotates to the vertical position, the first lifting structure 342 is activated. The second linear actuator 3423 in the first lifting structure 342 applies a stable downward thrust to the slide plate 3422 connected to it. Since the slide plate 3422 and the second guide rod 3421 are in sliding engagement, under the action of the thrust, the slide plate 3422 moves smoothly downward along the vertical direction of the second guide rod 3421 without lateral deviation. At the same time, the flexible pawl 341 moves downward synchronously with the slide plate 3422. The flexible pawl teeth at its lower end gradually extend downward, eventually exceeding the lower end face of the push plate 31. Under the continuous drive of the second linear actuator 3423, the protruding flexible pawl teeth continue to move downward and insert below the surface soil of the trench. The flexible pawl 341 is driven by the first lifting structure 342 to move up and down along the surface of the push plate 31, thereby enabling the flexible pawl 341 to adapt to trenches of different depths.

[0043] Reference Figure 3 , Figure 4 and Figure 5 As shown: The flexible push structure 34 also includes a pressure sensor 343 and a buffer structure 344; the pressure sensor 343 is disposed between the flexible push plate 341 and the push plate 31, and is used to detect the resistance encountered by the flexible push plate 341 during its movement; the buffer structure 344 is disposed between the flexible push plate 341 and the first lifting structure 342, and is used to reduce the resistance encountered by the flexible push plate 341 on the push plate 31.

[0044] Specifically, the buffer structure 344 includes a mounting plate 3441 and a plurality of third guide rods 3442. The mounting plate 3441 is arranged parallel to one side of the slide plate 3422, and the flexible lever 341 is arranged on the mounting plate 3441. The plurality of third guide rods 3442 are parallel to each other, and one end of the third guide rod 3442 is connected to the mounting plate 3441. The other end of the third guide rod 3442 passes through the flexible lever 341 and is slidably connected to the flexible lever 341. A second spring 3443 is sleeved on the third guide rod 3442, and the two ends of the second spring 3443 abut against the mounting plate 3441 and the slide plate 3422 respectively.

[0045] As the pusher 31 moves along the transverse guide structure 32 towards the field ridge, driven by the disengagement drive structure 5, the flexible teeth at the lower end of the flexible pusher 341 contact the stolons in the soil. At this time, the stolons generate reverse resistance against the flexible teeth, which is transmitted to the mounting plate 3441 through the flexible pusher 341. Under the action of resistance, the mounting plate 3441 moves towards the sliding plate 3422, while simultaneously compressing the second spring 3443 sleeved on the third guide rod 3442. During the compression process, the second spring 3443 absorbs the energy of the reverse force, converting the rigid impact into elastic deformation, thus preventing the reverse force from being directly transmitted to the sliding plate 3422 and the pusher 31 through the buffer structure 344, achieving force buffering. While the flexible pusher 341 is subjected to reverse resistance, the pressure sensor 343 detects the magnitude of the resistance transmitted from the back of the flexible pusher 341 in real time. If the detected resistance is small, it indicates that the current contact force is moderate. Continue to operate at the original moving speed of the flexible push plate 341. If the detected resistance is close to or exceeds the threshold, it indicates that the flexible push plate 341 may cause excessive compression to the creep. Reduce the output power of the push drive structure 5 and slow down the moving speed of the flexible push plate 341 along the transverse guide structure 32 until the resistance drops to a safe range to avoid the creep breaking due to excessive force. After the separation operation is completed, the reverse resistance of the creep to the flexible push plate 341 disappears. The second spring 3443 returns to its natural elongation state under the action of elastic force, pushing the mounting plate 3441 and the flexible push plate 341 back to the initial position. Through the synergistic effect of the pressure sensor 343 and the buffer structure 344, the flexible push structure 34 achieves dual protection of buffering and speed regulation during the movement of the creep.

[0046] Reference Figure 3 , Figure 4 and Figure 6 As shown: The upper end of the flexible lever 341 is provided with a sub-plate structure 36, which includes a flexible baffle 361 and a connecting block 362; the lower end of the flexible baffle 361 is connected to the upper end of the flexible lever 341 by a hinge; the connecting block 362 is slidably connected to the push plate 31, and the connecting block 362 is hinged to the upper end of the flexible baffle 361.

[0047] There is a gap between the upper end of the flexible baffle 341 and the push plate 31. Some stems and leaves of the fallen plant may get stuck in this gap. When the rotating structure 33 drives the push plate 31 to rotate in the horizontal direction, the stems and leaves in this gap may be squeezed. Therefore, a sub-plate structure 36 is set at the upper end of the flexible baffle 341. The connecting block 362 keeps the upper end of the flexible baffle 361 close to the push plate 31. When the flexible baffle 341 moves downward, the flexible baffle 341 drives the flexible baffle 361 to move downward synchronously, so that the gap between the upper end of the flexible baffle 341 and the push plate 31 is always covered, thereby preventing the stems and leaves of the plant from getting stuck in the gap between the upper end of the flexible baffle 341 and the push plate 31.

[0048] Reference Figure 6 and Figure 7 As shown: The sub-plate structure 36 also includes two reset structures 363, which are respectively disposed on both sides of the push plate 31 and connected to the two ends of the two connecting blocks 362.

[0049] Specifically, the reset structure 363 includes a fourth guide rod 3631, a second slider 3632, and a third spring 3633. The axial direction of the fourth guide rod 3631 is parallel to the moving direction of the flexible dial plate 341, and both ends of the fourth guide rod 3631 are connected to the push plate 31. The second slider 3632 is slidably disposed on the fourth guide rod 3631 and is connected to the connecting block 362. The third spring 3633 is sleeved on the fourth guide rod 3631, and both ends of the third spring 3633 abut against the second slider 3632 and the push plate 31, respectively.

[0050] When the flexible lever 341 moves downward, it simultaneously applies a downward pulling force to the flexible baffle 361. The upper end of the flexible baffle 361 pulls the two second sliders 3632 downward along their respective fourth guide rods 3631. The third spring 3633 on the fourth guide rod 3631 is compressed. When the flexible lever 341 moves upward, the two third springs 3633 simultaneously release their elastic potential energy, pushing the second sliders 3632 to reset along the fourth guide rod 3631. At this time, the two second sliders 3632 simultaneously provide a pulling force to the upper end of the flexible baffle 361, pulling the flexible baffle 361 to reset. Through the guidance of the fourth guide rod 3631, the transmission of the second sliders 3632, and the elastic action of the third springs 3633, the flexible baffle 361 is provided with automatic adjustment power to rise and fall with the flexible lever 341, ensuring that the gap is always effectively closed during the entire stroke of the flexible lever 341.

[0051] Reference Figure 3 , Figure 8 and Figure 9 As shown: The transverse guide structure 32 includes a support arm 321, a first slider 322, and a guide assembly 323; one end of the support arm 321 is connected to the folding lifting mechanism 4; the first slider 322 is movably mounted on the support arm 321 and is hinged to the push plate 31; the guide assembly 323 is mounted on the support arm 321 and connected to the first slider 322, and is used to guide the first slider 322 to move along the length direction of the support arm 321.

[0052] Specifically, the guide assembly 323 includes a plurality of first guide rods 3231, which are parallel to each other. The first slider 322 is slidably connected to the plurality of first guide rods 3231, and each first guide rod 3231 is fitted with a first spring 3232. The two ends of the first spring 3232 abut against the first slider 322 and the push plate 31, respectively.

[0053] When the device encounters a creeping stem, the folding lifting mechanism 4 drives the support arm 321 to rotate to a horizontal position, at which point the push plate 31 is in a vertical position. Next, the disengagement drive structure 5 begins to operate. It applies a thrust along the length of the support arm 321 to the first slider 322. Under the action of the guide assembly 323, the first slider 322 slides smoothly along multiple parallel first guide rods 3231. The first guide rods 3231 restrict the offset of the first slider 322 through multi-directional constraints, ensuring that the first slider 322 moves only along the length of the support arm 321. As the first slider 322 moves, the push plate 31 moves synchronously towards the field ridge under the drive of the first slider 322. Simultaneously, the first spring 3232 on the first guide rod 3231 is compressed by the first slider 322, compressing and storing elastic potential energy to provide a power basis for subsequent reverse movement. When the flexible disengagement plate 341 contacts the stolon, requiring reciprocating movement to separate the stolon from the soil, the disengagement drive structure 5 adjusts its output force. At the instant the force applied to the first slider 322 by the disengagement drive structure 5 decreases, the first spring 3232 releases part of its stored elastic potential energy, generating a reverse thrust that acts on the first slider 322, pushing it to move slightly along the first guide rod 3231 in the initial direction. This, in turn, causes the push plate 31 and the flexible deflector plate 341 to move in the opposite direction. At the instant the force applied to the first slider 322 by the disengagement drive structure 5 increases, the first slider 322 overcomes the spring force and moves again towards the ridge. The first spring 3232 is further compressed to store energy. This cycle repeats. Under the combined action of the main power of the disengagement drive structure 5 and the elastic force of the first spring 3232, the first slider 322 drives the push plate 31 and the flexible deflector plate 341 to achieve stable reciprocating movement. This allows the flexible deflector plate 341 to gently push the creeping stem multiple times, avoiding breakage of the creeping stem due to a single force application.

[0054] Reference Figure 8 and Figure 9 As shown: The rotating structure 33 includes a bracket 331, a first linear actuator 332 and a connecting plate 333; one end of the bracket 331 is hinged to the transverse guide structure 32; the first linear actuator 332 is mounted on the bracket 331; the connecting plate 333 is mounted on the push plate 31 and is hinged to the output end of the first linear actuator 332.

[0055] In the initial state, the support 331, push plate 31, and first slider 322 form a triangular structure. When the push plate 31 moves to the edge of the ridge and needs to rotate upwards, the output end of the first linear drive extends. Since one end of the first linear actuator 332 is fixed to the support 331, and the other end is hinged to the push plate 31 through the connecting plate 333, the extension of the output end directly causes the length of the side containing the first linear actuator 332 in the initially formed triangular structure of the rotating structure 33 to increase. According to the relationship between the side length and angle of a triangle, when the length of one side increases, and the other two... When the endpoints of the strip are fixed, the angle between the other two sides will increase accordingly, that is, the angle between the push plate 31 and the support 331 gradually increases. The push plate 31 begins to rotate around its hinge point with the first slider 322. The flexible push plate 341 of the push plate 31 will support the fallen plant. As the angle of the push plate 31 gradually tilts, the plant is slowly lifted up under the lifting force of the push plate 31. At this time, the roots of the plant are exposed within the range of the liquid fertilizer pipe 35, so that the liquid fertilizer can be accurately and fully sprayed on the roots of the plant, greatly improving the absorption efficiency of the liquid fertilizer.

[0056] Reference Figure 3 , Figure 10 and Figure 11 As shown: The folding and lifting mechanism 4 includes a folding structure 41 and a second lifting structure 42; the folding structure 41 is connected to two disengagement units 3 and switches the disengagement units 3 between a horizontal state and a vertical state; the second lifting structure 42 is used to drive the two disengagement units 3 to move up and down in the vertical direction.

[0057] Specifically, the folding structure 41 includes a lifting plate 411, two rotating shafts 412, a gear set 413, and a worm gear drive assembly 414. The lifting plate 411 is connected to the second lifting structure 42. The two rotating shafts 412 are parallel to each other and vertically pass through the lifting plate 411 and are connected to the lifting plate 411 through bearings. The gear set 413 is used for the two rotating shafts 412 to make the two rotating shafts 412 rotate synchronously in opposite directions. The second lifting structure 42 includes a lifting driver 422 and a plurality of fifth guide rods 421. The output end of the lifting driver 422 is connected to the lifting plate 411. The plurality of fifth guide rods 421 are vertically arranged and the lifting plate 411 is slidably connected to the fifth guide rods 421. The worm gear drive assembly 414 is connected to one of the rotating shafts 412.

[0058] When the device completes fertilization or needs to be stored, the worm gear drive assembly 414 of the folding structure 41 drives one of the connected rotating shafts 412 to rotate around its own axis. The other rotating shaft 412 rotates synchronously with the first rotating shaft 412 in the opposite direction, and drives the fixedly connected release unit 3 support arm 321 to rotate upward. The left rotating shaft 412 drives the left support arm 321 to rotate counterclockwise upward, and the right rotating shaft 412 drives the right support arm 321 to rotate clockwise upward. Throughout the process, the gear set 413 always keeps the two rotating shafts 412 rotating synchronously in opposite directions to ensure that the rotation angle of the two support arms 321 is consistent. As the rotating shafts 412 continue to rotate, the support arms 321 gradually move from a horizontal state. Lift the device upwards until the two support arms 321 rotate to a near-vertical storage angle. At this point, the worm gear drive assembly 414 stops operating, and the lifting driver 422 in the second lifting structure 42 generates an upward thrust on the lifting plate 411. The lifting plate 411 slides upwards along multiple vertically arranged fifth guide rods 421. The fifth guide rods 421 provide stable guidance for the lifting plate 411, preventing the lifting plate 411 from shifting or tilting during the lifting process. The lifting plate 411 drives the folding structure 41 and the two folded release units 3 on it to move upwards synchronously. By folding first and then lifting, the overall volume of the device is greatly reduced when not in use, making it easy to transport in narrow field passages.

[0059] Reference Figure 3 , Figure 10 and Figure 12 As shown: the deflection drive structure 5 includes two pneumatic drive units 51 and an air supply unit 52; the two pneumatic drive units 51 are respectively disposed on the two deflection units 3, and the pneumatic drive units 51 are connected to the flexible deflection structure 34; the air supply unit 52 is connected to the two pneumatic drive units 51.

[0060] Specifically, the pneumatic drive unit 51 includes a guide cylinder 511, a third slider 512, and a drive airbag 513. The axial direction of the guide cylinder 511 is parallel to the length direction of the support arm 321, and both ends of the guide cylinder 511 are connected to both ends of the support arm 321. The third slider 512 is slidably disposed inside the guide cylinder 511, and one end of the third slider 512 extends out of the guide cylinder 511 and is connected to the first slider 322. The drive airbag 513 is disposed inside the guide cylinder 511, and both ends of the drive airbag 513 are respectively connected to the third slider 512 and the air supply unit 52. The air supply unit 52 includes two air guide pipes 521, and the two air guide pipes 521 are respectively connected to the drive airbags 513 in the two pneumatic drive units 51.

[0061] When the flexible push plate 341 needs to be driven, the air supply unit 52 pumps gas into the drive airbag 513 through the air pipe 521, causing the drive airbag 513 to gradually expand and elongate. The thrust generated by the expansion pushes the third slider 512 to slide along the axis of the guide cylinder 511. When the third slider 512 slides, it simultaneously drives the first slider 322, which is fixedly connected to it, to move along the first guide rod 3231 of the transverse guide structure 32. The first slider 322 then drives the push plate 31 and the flexible push structure 34 on the push plate 31 to move towards the field ridge. The flexible push teeth of the flexible push plate 341 contact the stolons in the soil. When the flexible push plate 341 pushes... When the stolon moves and encounters soil resistance or reverse resistance generated by the stolon's own toughness, this resistance is transmitted to the third slider 512 through the push plate 31 and the first slider 322. The third slider 512 generates reverse pressure on the driving airbag 513. Since the driving airbag 513 is a flexible inflatable structure, it will be compressed to a certain extent under the action of reverse pressure, converting rigid resistance into flexible buffer. The compression deformation of the airbag absorbs part of the resistance energy, avoiding the resistance from being directly transmitted to the guide cylinder 511 or the support arm 321. Through the flexible inflatable driving design of the driving airbag 513, it can achieve power transmission while having resistance buffering capability.

[0062] A fertilization method, applied to a liquid fertilizer applicator for plants, includes the following steps:

[0063] S1. The walking unit 1 moves along the length of the trench. When there is a creeping stem in front of the walking unit 1, the folding and lifting mechanism 4 lowers the two disengaging units 3 and unfolds them to a horizontal state.

[0064] S2. The push-off drive structure 5 drives the flexible push-off structure 34 to move along the guide direction of the transverse guide structure 32 through the push plate 31, and the flexible push-off structure 34 pushes the stolon to separate from the ground.

[0065] S3. When the push plate 31 and the flexible push structure 34 move to the side of the field ridge, the rotating structure 33 rotates the push plate 31 from the vertical state to the horizontal state, and lifts the fallen plants up.

[0066] S4. The liquid fertilizer in the liquid fertilizer tank 2 is sprayed onto the roots of the plant through the liquid fertilizer pipe 35.

[0067] The above embodiments only illustrate one or more implementation methods of this invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these all fall within the protection scope of this invention. Therefore, the protection scope of this invention should be determined by the appended claims.

Claims

1. A plant liquid fertilizer application device, comprising a walking unit (1) and a liquid fertilizer tank (2) for providing liquid fertilizer, characterized in that, It also includes two disengagement units (3), a folding lifting mechanism (4), and a disengagement drive structure (5); Two separation units (3) are horizontally symmetrical about the forward direction of the walking unit (1). The separation unit (3) includes a push plate (31), a horizontal guide structure (32), a rotating structure (33), a flexible push structure (34), and a liquid fertilizer pipe (35). The push plate (31) is vertically set and used to lift up the fallen plants. The horizontal guide structure (32) is used to guide the push plate (31) to move from the ditch to the field ridge. The rotating structure (33) is used to drive the push plate (31) to rotate within the vertical and horizontal range. The flexible push structure (34) is set on the side of the push plate (31) facing the fallen plants. The flexible push plate (341) is used to separate the stolons that are close to the surface of the field ridge from the soil. The liquid fertilizer pipe (35) is set on the other side of the push plate (31), and one end of it is connected to the liquid fertilizer box (2). The folding lifting mechanism (4) is installed on the walking unit (1). The folding lifting mechanism (4) is used to fold the two disengagement units (3) and drive the two disengagement units (3) to rise and fall in the vertical direction. The push-off drive structure (5) is connected to two flexible push-off structures (34) and drives the flexible push-off structures (34) to apply a thrust to the stolon; The flexible push structure (34) includes a flexible push plate (341) and a first lifting structure (342). The flexible lever (341) is arranged parallel to one side of the push plate (31), and the lower end of the flexible lever (341) has flexible lever teeth; The first lifting structure (342) is mounted on the push plate (31) and is used to drive the flexible lever (341) to move up and down along the surface of the push plate (31); The flexible push structure (34) also includes a pressure sensor (343) and a buffer structure (344). A pressure sensor (343) is disposed between the flexible dial plate (341) and the push plate (31) to detect the resistance encountered by the flexible dial plate (341) during its movement. A buffer structure (344) is disposed between the flexible lever (341) and the first lifting structure (342). The buffer structure (344) is used to reduce the resistance acting on the push plate (31) on the flexible lever (341).

2. The plant liquid fertilizer application device according to claim 1, characterized in that, The upper end of the flexible baffle (341) is provided with a sub-plate structure (36), which includes a flexible baffle (361) and a connecting block (362). The lower end of the flexible baffle (361) is connected to the upper end of the flexible lever (341) by a hinge; The connecting block (362) is slidably connected to the push plate (31), and the connecting block (362) is hinged to the upper end of the flexible baffle (361).

3. The plant liquid fertilizer application device according to claim 2, characterized in that, The sub-plate structure (36) also includes two reset structures (363), which are respectively located on both sides of the push plate (31) and connected to the two ends of the two connecting blocks (362).

4. The plant liquid fertilizer application device according to claim 1, characterized in that, The transverse guide structure (32) includes a support arm (321), a first slider (322), and a guide assembly (323); One end of the outrigger (321) is connected to the folding lifting mechanism (4); The first slider (322) is movably mounted on the support arm (321), and the first slider (322) is hinged to the push plate (31); The guide assembly (323) is disposed on the support arm (321) and connected to the first slider (322), and is used to guide the first slider (322) to move along the length direction of the support arm (321).

5. A plant liquid fertilizer application device according to claim 1, characterized in that, The rotating structure (33) includes a bracket (331), a first linear actuator (332), and a connecting plate (333); One end of the bracket (331) is hinged to the transverse guide structure (32); The first linear actuator (332) is mounted on the bracket (331); The connecting plate (333) is mounted on the push plate (31), and the connecting plate (333) is hinged to the output end of the first linear driver (332).

6. The plant liquid fertilizer application device according to claim 1, characterized in that, The folding lifting mechanism (4) includes a folding structure (41) and a second lifting structure (42); The folding structure (41) is connected to two disengagement units (3) and switches the disengagement units (3) between a horizontal state and a vertical state; The second lifting structure (42) is used to drive the two disengagement units (3) to move up and down in the vertical direction.

7. A plant liquid fertilizer application device according to claim 1, characterized in that, The disengagement drive structure (5) includes two pneumatic drive units (51) and an air supply unit (52). Two pneumatic drive units (51) are respectively installed on two disengagement units (3), and the pneumatic drive units (51) are connected to the flexible push structure (34); The air supply unit (52) is connected to two pneumatic drive units (51).

8. A fertilization method, applied to a liquid fertilizer applicator for plants as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. The walking unit (1) moves along the length of the trench. When there is a creeping stem in front of the walking unit (1), the folding lifting mechanism (4) lowers the two disengaging units (3) and unfolds them to a horizontal state. S2, the push-off drive structure (5) drives the flexible push-off structure (34) to move along the guide direction of the transverse guide structure (32) through the push plate (31), and the flexible push-off structure (34) pushes the creeping stem to separate from the ground; S3. When the push plate (31) and the flexible push structure (34) move to the side of the field ridge, the rotating structure (33) rotates the push plate (31) from the vertical state to the horizontal state, and lifts the fallen plants up. S4. The liquid fertilizer in the liquid fertilizer tank (2) is sprayed onto the roots of the plant through the liquid fertilizer pipe (35).

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