Precise liquid supplementing and fertilizing machine for ensuring timely seeding of summer maize

Abstract

This invention provides a precision liquid fertilizer applicator for timely sowing of summer maize, relating to the field of agricultural machinery technology. It includes a suspension frame with a V-shaped bracket fixedly installed at the upper end. Irrigation structures are mounted on the suspension frame and the V-shaped bracket. Continuous liquid supply is achieved through the suspension frame's connection to a tractor and the liquid supply pipe's connection to an external liquid supply tank. As the implement moves at a constant speed with the tractor, the plow hook completes field ditching. Simultaneously, the distributor independently regulates the liquid fertilizer output via an electronic control module. The liquid fertilizer is delivered to the fertilizer applicator body through the distributor's outlet, delivery pipe, and fertilizer bin inlet. The electronic control module can separately adjust the discharge flow rates of solid fertilizer and liquid fertilizer. The two types of fertilizer are independently delivered into the furrows opened by the plow hook through their respective channels, forming a complete machine assembly structure suitable for timely sowing of summer maize in dryland areas and possessing a large liquid storage capacity for continuous operation.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery technology, and more specifically, it relates to a precision liquid fertilizer applicator that ensures timely sowing of summer corn. Background Technology

[0002] In arid regions of North China or areas with limited irrigation, corn planting often encounters insufficient rainfall and soil moisture, preventing timely planting. During droughts, farmers are forced to wait for rain, significantly delaying the planting period and compressing the effective growth cycle of corn. This results in insufficient accumulated temperature, restricted growth and development, and ultimately reduced yield and quality. If dry sowing is forced, the seeds lack the water needed for germination, leading to slow, uneven, and low emergence rates, significantly reducing the survival rate and planting stability in the field.

[0003] Currently, conventional field irrigation mainly adopts extensive methods such as surface flooding and surface sprinkler irrigation. Water is only retained in the shallow soil layer, and under the high temperature stress of summer, evaporation loss is huge, resulting in extremely low water utilization efficiency. It is impossible to accurately deliver water to the critical soil layer of 5-10cm for corn seed germination, and it is impossible to form a stable moist environment in the sowing layer. Even with a small amount of water, it is difficult to ensure the water required for normal seed germination. The risk of seedling death due to water shortage in dry land is extremely high. At the same time, the existing liquid media application is mostly surface spraying, which not only has insufficient depth of water and fertilizer application, but also poor application uniformity, making it impossible to achieve targeted water and fertilizer supply during the seedling stage and failing to meet the precise growth needs of summer corn seedlings. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a precision liquid fertilizer applicator that ensures timely sowing of summer maize, thereby resolving the aforementioned issues.

[0005] A precision liquid fertilizer applicator that ensures timely sowing of summer corn includes a suspension frame, with multiple plow hooks at the lower end of one side of the suspension frame and a V-shaped bracket fixedly installed at the upper end of the suspension frame.

[0006] Preferably, the suspension frame and V-shaped bracket are equipped with an irrigation structure, which is parallel to the plow hook. The irrigation structure includes a distributor with multiple liquid outlets on its side wall. The suspension frame has multiple notches on its side wall, and a C-shaped rotating frame is fixedly installed inside each notch. A first C-shaped rotating rod and a second C-shaped rotating rod are rotatably installed inside the C-shaped rotating frame. A fertilizer applicator body is rotatably installed between the first and second C-shaped rotating rods. A solid fertilizer discharge pipe is provided on the side wall of the distributor, located on one side of the plow hook. The fertilizer applicator body has only a liquid fertilizer delivery channel inside, and it is equipped with a lower liquid fertilizer guide port aligned with the soil layer 5cm below the seed area. Solid fertilizer is directly delivered by the distributor through the solid fertilizer... The discharge pipe leads out independently, with the discharge end of the solid fertilizer discharge pipe facing 5-7cm above the seed side. The solid fertilizer does not pass through the interior of the fertilizer planter body throughout the process. The distributor is located inside the V-shaped support, and an electrical control module is installed on the side wall of the distributor. The electrical control module has a dual-channel independent control function, which can separately control the discharge flow of liquid fertilizer and solid fertilizer. The side wall of the distributor away from the electrical control module is symmetrically equipped with replenishment pipes. The upper end of the fertilizer planter body is equipped with a fertilizer hopper. The fertilizer hopper only serves as a transfer component for the liquid fertilizer pipeline and does not store solid fertilizer. The side wall of the fertilizer hopper is equipped with an independent liquid inlet. A conveying pipe is provided between the liquid inlet and the liquid outlet. The conveying pipe only delivers liquid fertilizer to the liquid fertilizer channel inside the fertilizer planter body. The conveying pipe is not interconnected with the inner cavity of the fertilizer hopper.

[0007] Preferably, the inner side of the suspension frame is provided with a central beam, and the central beam is provided with a hydraulic damping structure. When the irrigation structure is bumped due to uneven soil, the hydraulic damping structure will improve the stability of the irrigation structure during movement. The hydraulic damping structure includes hydraulic cylinders, and multiple hydraulic cylinders are fixedly installed above the central beam. The inner side of each hydraulic cylinder is provided with a first piston rod and a second piston rod, and the lower end of each hydraulic cylinder is provided with a first oil outlet and a second oil outlet. Flexible couplings are fixedly installed on the side walls of both the first and second piston rods. An eccentric wheel is symmetrically fixedly installed on the outer side of one side of the rotating shaft of the second C-shaped rotating rod. A first rotating connecting rod is rotatably installed on the eccentric shaft of the eccentric wheel, and a second rotating connecting rod is rotatably installed between the flexible coupling and the first rotating connecting rod.

[0008] Preferably, the fertilizer planter body has a first stabilizing structure on its side wall. The first stabilizing structure includes a side vertical beam, which is fixedly mounted on the side wall of the fertilizer planter body. A storage cavity is formed inside the side vertical beam. A first single-acting hydraulic rod and a vertical sliding rod are provided inside the storage cavity. An auxiliary wheel is rotatably mounted on the lower end of the vertical sliding rod. The first single-acting hydraulic rod is fixedly mounted at the bottom of the storage cavity. The vertical sliding rod is slidably mounted with the storage cavity. A connecting plate is fixedly mounted between the output shaft of the first single-acting hydraulic rod and the upper end of the vertical sliding rod. A shock-absorbing spring is provided inside the connecting plate. A first pressure relief connector and a first liquid inlet connector are respectively provided on the side wall of the first single-acting hydraulic rod and are exposed outside the side vertical beam.

[0009] Preferably, a second stabilizing structure is provided on the side wall of the irrigation structure. The second stabilizing structure includes a triangular rod, which is fixedly mounted on the side wall of the side vertical beam. A first rotating seat is provided at the end of the triangular rod. A second rotating seat is fixedly installed on the side wall of the fertilizer planter body. The second rotating seat is located on the outside of the side vertical beam. A rear beam rod is symmetrically and rotatably mounted on the inner side of the second rotating seat. A main wheel is provided on the inner side of the rear beam rod. A connecting beam is fixedly installed between the rear beam rods. A third rotating seat is fixedly installed at the upper end of the connecting beam. A second single-acting hydraulic rod is provided between the first rotating seat and the third rotating seat. A rotating handle is fixedly installed at the bottom of the first pressure relief connector and on the output shaft. The rotating handle is rotatably mounted with the first rotating seat and the third rotating seat. A second liquid inlet connector and a second pressure relief connector are respectively provided around the rotating handle. A first oil passage is fixedly connected between the first oil outlet and the first liquid inlet connector. A second oil passage is provided between the second oil outlet and the second liquid inlet connector.

[0010] Preferably, the irrigation structure is provided with a pressure relief structure, which includes a pressure relief safety valve. The pressure relief safety valve is provided with two tubular pressure oil tanks around its periphery. A pressure relief spring is fixedly installed at the bottom of the tubular pressure oil tank. The end of the pressure relief spring is provided with a sealing piston, which is slidably installed inside the tubular pressure oil tank. One of the tubular pressure oil tanks is fixedly connected to a first pressure relief pipe with a first pressure relief connector, and the other tubular pressure oil tank is fixedly connected to a second pressure relief pipe with a second pressure relief connector.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] In this invention, continuous liquid supply is achieved through the connection between the suspension frame and the tractor, and the connection of the replenishment pipe to the external replenishment tank. As the implement moves at a constant speed with the tractor, the plow hook completes the field ditching operation. Simultaneously, the distributor, relying on the electronic control module, independently regulates the output flow of liquid and solid fertilizers through dual channels. Liquid fertilizer is transported through the distributor's outlet, conveying pipe, and fertilizer bin inlet to an independent liquid fertilizer conveying channel inside the fertilizer applicator. The fertilizer bin only serves as a transfer component in the liquid fertilizer pipeline and does not store solid fertilizer. Solid fertilizer is stored in the distributor's built-in storage chamber and, after being controlled, is directly discharged through the solid fertilizer outlet pipe on the side wall of the distributor, never entering the fertilizer applicator itself. The electronic control module can independently regulate the output flow of liquid and solid fertilizers. The machine precisely controls the output of solid and liquid fertilizers. The two types of fertilizers are delivered to the furrows opened by the plow hook through their respective independent pipelines, realizing simultaneous and continuous operation of furrow opening, side application of solid fertilizer, and bottom replenishment of liquid fertilizer. The total liquid storage capacity is 1 to 4 cubic meters, and it is equipped with a replenishment tank for continuous liquid supply, which meets the needs of large-scale continuous sowing, fertilization and replenishment operations in the field. It avoids the problem of delaying the sowing window due to the need for frequent machine stoppages for replenishment caused by the small liquid storage capacity of traditional equipment. At the same time, it eliminates the step-by-step operation process of furrow opening, fertilization and replenishment, reducing the problem of rapid soil moisture loss caused by step-by-step operation. Thus, it realizes the large-capacity layered fertilization continuous operation of dryland summer corn sowing.

[0013] In this invention, the machine achieves precise positioning and layered application of solid and liquid fertilizers. Liquid fertilizer is accurately delivered to the soil layer 5cm below the seed area, while solid fertilizer is separately discharged from the solid fertilizer outlet pipe on the side wall of the distributor and delivered to the upper soil layer 5-7cm to the side of the seed. The liquid fertilizer is concentrated in the key germination soil layer below the corn seed, and will not be dispersed over a large area throughout the cultivated layer. After the operation, the cross-section of the field soil forms a structure with dry top and wet bottom. The dry surface soil effectively reduces water evaporation loss, while the moist soil layer below the seed can continuously supply water and nutrients for seed germination and seedling growth. This completely solves the problem of poor seedling emergence and low seedling rate caused by lack of natural rainfall after dry sowing in dry land. At the same time, it avoids the problems of large-scale surface evaporation and deep seepage loss of water in traditional flood irrigation and surface sprinkler irrigation. It realizes a precise liquid fertilization structure of targeted direct injection of liquid fertilizer into the lower layer and side-mounted layered application of solid fertilizer for summer corn in dry land.

[0014] In this invention, when the fertilizer applicator encounters raised ground, the first and second C-shaped rotating rods rotate counterclockwise upwards, thereby driving the eccentric wheel to rotate and pulling the first rotating connecting rod through the eccentric shaft. After the first and second rotating connecting rods complete the power connection, they pull the first and second piston rods inside the hydraulic cylinder to move outwards according to the crank-connecting rod structure principle. During the movement of the first and second piston rods, the liquid inside the hydraulic cylinder is driven to be transported outwards through the first oil passage connected by the first oil outlet and the second oil passage connected by the second oil outlet to the inside of the first and second single-acting hydraulic rods, respectively. At the same time, the movement of the first and second piston rods cooperates with... The flexible coupling dampens the rotation of the first and second C-shaped rotating rods, effectively reducing the amplitude of the fertilizer seeder's body when crossing uneven ground and suppressing its bouncing tendency. This avoids the problem of material shaking inside the fertilizer bin 24 and fluctuations in the flow of liquid fertilizer pipelines caused by the bumps, which would affect the uniformity of fertilization and liquid replenishment in each row. At the same time, it avoids the problem of rigid impact collisions between the first and second C-shaped rotating rods and the C-shaped rotating frame when the fertilizer seeder body shakes violently, which would accelerate the wear of the rotating mating surfaces. Thus, it significantly improves the stability of the fertilizer seeder body during its movement on uneven terrain and extends the service life of the rotating mating structure.

[0015] In this invention, during the synchronous process of the first C-shaped rotating rod and the second C-shaped rotating rod rotating counterclockwise upwards and the fertilizer planter body rising away from the ground, the liquid transported by the first oil circuit enters the first inlet connector on the first single-acting hydraulic rod inside the side vertical beam storage cavity, causing the output shaft of the first single-acting hydraulic rod to extend. The output shaft drives the vertical slide rod to slide downwards along the storage cavity through the connecting plate, pushing the auxiliary wheel at the bottom of the vertical slide rod to extend and touch the ground. At the same time, the connecting plate and the shock-absorbing spring are compressed and deformed by the shock-absorbing spring itself when the auxiliary wheel contacts the uneven ground and withstands the instantaneous impact reaction force. It absorbs and buffers impact energy, preventing rigid impacts from being directly transmitted through the vertical sliding bar to the first single-acting hydraulic rod and the fertilizer seeder body, thus avoiding structural overload damage. Simultaneously, it ensures that the auxiliary wheels maintain flexible contact with the ground in undulating terrain, preventing instantaneous ground clearance. This avoids the fertilizer seeder body losing lateral support and tilting after the auxiliary wheels leave the ground, which could cause uneven distribution of the water and fertilizer medium in the fertilizer bin and result in uneven fertilizer application across rows. Meanwhile, the liquid transported by the second oil circuit enters the interior of the second single-acting hydraulic rod. The rotating handles at both ends are respectively matched with the first and third rotating seats to form a rotational fit. While the second single-acting hydraulic rod extends for operation, it applies downward pressure to the connecting beam. The connecting beam drives the rear beam to swing downwards around the second rotating seat, causing its inner main wheel to contact the ground. The rear beam, through the second rotating seat, transmits the ground support reaction force borne by the main wheel to the side wall of the fertilizer planter body to share the load borne by the second single-acting hydraulic rod. This prevents the main wheel from becoming suspended off the ground in undulating terrain due to the rear beam's inability to swing freely with the terrain, thus avoiding the rear of the fertilizer planter body from losing its footing. This design eliminates the problem of longitudinal tipping of the entire machine, while also preventing the auxiliary and main wheels from alternatingly leaving the ground in undulating terrain. This avoids frequent changes in the posture of the fertilizer planter and seeder, causing drastic changes in the rotation angles of the first and second C-shaped rotating rods, which in turn leads to sudden increases and decreases in the internal fluid pressure of the hydraulic cylinder and damage to the seals. As a result, the fertilizer planter and seeder achieve bidirectional stable support from the front auxiliary support and the rear main support in uneven field terrain, ensuring that the machine maintains a horizontal posture throughout its movement and improving the fertilization stability of the fertilizer planter and seeder.

[0016] In this invention, when the internal working pressure of the first and second single-acting hydraulic rods is too high or when they are subjected to a large instantaneous downward pressure, the first pressure relief connector on the side wall of the first single-acting hydraulic rod, through the first pressure relief pipeline, and the second pressure relief connector at the second single-acting hydraulic rod, through the second pressure relief pipeline, synchronously deliver high-pressure liquid to the inside of the pressure relief safety valve. The high-pressure liquid acts on the sealed piston inside the tubular pressure tank and pushes open the compressed pressure relief spring to complete the hydraulic pressure relief operation inside the equipment. This effectively avoids the problem of the internal pressure of the first and second single-acting hydraulic rods continuously rising and exceeding the sealing pressure limit, causing cylinder rupture or high-pressure liquid leakage. At the same time, it avoids the problem of excessive residual pressure difference between the first and second single-acting hydraulic rods due to independent pressure relief of the two pipelines during the pressure relief operation, which would cause an imbalance in the support force between the auxiliary wheel and the main wheel and cause the fertilizer and seeder body to tilt. It also avoids the problem of the rigid structure directly bearing all the impact load when the instantaneous downward pressure is too large, resulting in plastic deformation or breakage of the connecting parts. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of a partial assembly structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the V-shaped bracket assembly structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the second rotating connecting rod assembly structure of the present invention;

[0021] Figure 5 This is a schematic diagram of the first rotating connecting rod assembly structure of the present invention;

[0022] Figure 6 This is a three-dimensional structural diagram of the fertilizer applicator of the present invention;

[0023] Figure 7 This is a schematic diagram of the fertilizer applicator assembly structure of the present invention;

[0024] Figure 8 This is a cross-sectional view of the pressure relief safety valve of the present invention;

[0025] Figure 9 This is a schematic diagram of the second single-acting hydraulic rod assembly structure of the present invention;

[0026] Figure 10 This is a sectional view of the side vertical beam of the present invention;

[0027] Figure 11 This is a graph showing the relationship between the water output reading and the actual point liquid volume of the present invention.

[0028] In the diagram, the correspondence between component names and attached drawing numbers is as follows: 11. Suspension frame; 12. Plow hook; 13. V-shaped bracket; 14. Distributor; 15. Electrical control module; 16. Liquid replenishment pipe; 17. Liquid outlet; 18. Notch; 19. C-shaped rotating frame; 21. First C-shaped rotating rod; 22. Second C-shaped rotating rod; 23. Fertilizer applicator body; 24. Fertilizer bin; 25. Liquid inlet; 26. Conveying pipe; 27. Hydraulic cylinder; 28. First piston rod; 29. ​​Second piston rod; 31. Flexible coupling; 32. Eccentric wheel; 33. First rotating connecting rod; 34. Second rotating connecting rod; 35. Side vertical beam; 36. Storage cavity; 37. First single-acting hydraulic rod; 38. Vertical sliding rod; 39. Auxiliary wheel ; 41. Connecting plate; 42. Shock-absorbing spring; 43. First pressure relief connector; 44. First liquid inlet connector; 45. Triangular rod; 46. First rotating seat; 47. Second rotating seat; 48. Rear beam rod; 49. Connecting beam; 51. Main wheel; 52. Third rotating seat; 53. Second single-acting hydraulic rod; 54. Rotating handle; 55. Second liquid inlet connector; 56. Second pressure relief connector; 57. Pressure relief safety valve; 58. Tubular pressure oil tank; 59. Pressure relief spring; 61. Sealing piston; 62. First pressure relief pipeline; 63. Second pressure relief pipeline; 64. First oil outlet; 65. Second oil outlet; 66. First oil passage; 67. Second oil passage; 68. Middle beam; 69. Solid fertilizer discharge pipe. Detailed Implementation

[0029] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0030] Please see Figure 1 - Figure 11This invention provides a precision liquid fertilizer applicator for timely sowing of summer maize, comprising a suspension frame 11, with multiple plow hooks 12 at the lower end of one side of the suspension frame 11, and a V-shaped bracket 13 fixedly installed at the upper end of the suspension frame 11. An irrigation structure is provided on the suspension frame 11 and the V-shaped bracket 13, parallel to the plow hooks 12. The irrigation structure includes a distributor 14, with multiple liquid outlets 17 on its side wall. Multiple notches 18 are opened on the side wall of the suspension frame 11, with a C-shaped rotating frame 19 fixedly installed inside each notch 18. A first C-shaped rotating rod 21 and a second C-shaped rotating rod 22 are rotatably installed inside the C-shaped rotating frame 19. A fertilizer applicator body 23 is rotatably installed between the first C-shaped rotating rod 21 and the second C-shaped rotating rod 22. A solid fertilizer discharge pipe 69 is provided on the side wall of the distributor 14, located on one side of the plow hooks 12. The distributor 14 is located inside the V-shaped bracket 13. The distributor 14 has an electrical control module 15 on its side wall. A liquid replenishment pipe 16 is symmetrically arranged on the side wall of the distributor 14 away from the electrical control module 15. A fertilizer bin 24 is located at the upper end of the fertilizer planter body 23. An inlet 25 is located on the side wall of the fertilizer bin 24, and a conveying pipe 26 is located between the inlet 25 and the outlet 17. The distributor 14, electrical control module 15, and fertilizer planter body 23 are all existing technologies. The distributor 14 has both a solid fertilizer storage chamber and a liquid fertilizer distribution chamber. The fertilizer bin 24 only serves as a transfer structure for the liquid fertilizer pipeline and does not store solid fertilizer. The electrical control module 15 can independently control the output of liquid fertilizer and solid fertilizer. The fertilizer planter body 23 only has a liquid fertilizer conveying channel, used only for conveying liquid fertilizer. Solid fertilizer is output from the solid fertilizer storage chamber inside the distributor 14 and directly placed into the field ditch via the solid fertilizer outlet pipe 69, without entering the fertilizer planter body 23 throughout the process.

[0031] Continuous liquid supply is achieved through the connection between the suspension frame 11 and the tractor, and the connection of the replenishment pipe 16 to the external replenishment tank. As the implement moves at a constant speed with the tractor, the plow hook 12 completes the field ditching operation. Simultaneously, the distributor 14, relying on the electronic control module 15, independently regulates the output flow of liquid and solid fertilizers through dual channels. Liquid fertilizer is transported through the distributor 14's outlet 17, delivery pipe 26, and fertilizer bin 24's inlet 25 to the independent liquid fertilizer channel inside the fertilizer applicator body 23. Solid fertilizer is stored in... The distributor 14 has its own storage chamber. After being controlled, the fertilizer is discharged directly to the outside through the solid fertilizer discharge pipe 69 on the side wall. The fertilizer and seeder body 23 is not passed through the entire process. The electronic control module 15 can adjust the discharge flow of solid fertilizer and liquid fertilizer respectively. The two types of fertilizer are put into the furrow opened by the plow hook 12 through independent pipelines, realizing the simultaneous and continuous operation of furrow opening, side application of solid fertilizer and bottom replenishment of liquid fertilizer. This forms a complete machine assembly structure that is suitable for timely sowing of summer corn in dryland and has the ability to continuously operate with a large liquid storage capacity.

[0032] This equipment enables zoned, targeted, and layered application of solid and liquid fertilizers. Liquid fertilizer is precisely delivered to the soil layer 5cm below the seed area, while solid fertilizer is separately discharged from the solid fertilizer outlet pipe 69 and applied to the upper soil layer 5-7cm to the side of the seed. The liquid fertilizer is concentrated in the key germination soil layer below the corn seed, preventing it from spreading over a large area to the entire cultivated layer. After operation, the field soil forms a layered structure with a dry surface and a moist bottom. The dry surface soil significantly reduces water evaporation loss, while the moist soil layer below the seed continuously provides water and nutrients for seed germination and seedling growth. This completely solves the problems of no germination, uneven germination, and low germination rate caused by lack of natural rainfall in dry-sown fields. At the same time, it eliminates the resource waste caused by large-scale water evaporation and deep seepage in traditional flood irrigation and surface sprinkler irrigation. It achieves a precise liquid fertilization structure with targeted deep application of liquid fertilizer to the sowing layer of summer corn in dry fields and lateral layered application of solid fertilizer.

[0033] The suspension frame 11 has a central beam 68 on its inner side, and a hydraulic damping structure is provided on the central beam 68. When the irrigation structure is bumped due to uneven soil, the hydraulic damping structure will improve the stability of the irrigation structure during movement. The hydraulic damping structure includes a hydraulic cylinder 27. Multiple hydraulic cylinders 27 are fixedly installed above the central beam 68. The inner side of the hydraulic cylinder 27 is provided with a first piston rod 28 and a second piston rod 29 respectively. The lower end of the hydraulic cylinder 27 is provided with a first oil outlet 64 and a second oil outlet 65 respectively. Flexible couplings 31 are fixedly installed on the side walls of the first piston rod 28 and the second piston rod 29. An eccentric wheel 32 is symmetrically fixedly installed on the outer side of one side of the rotating shaft on the second C-shaped rotating rod 22. A first rotating connecting rod 33 is rotatably installed on the eccentric shaft of the eccentric wheel 32. A second rotating connecting rod 34 is rotatably installed between the flexible coupling 31 and the first rotating connecting rod 33.

[0034] When the fertilizer planter body 23 encounters raised ground, the first C-shaped rotating rod 21 and the second C-shaped rotating rod 22 rotate counterclockwise upwards, thereby driving the eccentric wheel 32 to rotate and pulling the first rotating connecting rod 33 to move via the eccentric shaft. After the first rotating connecting rod 33 and the second rotating connecting rod 34 complete the power connection, they pull the first piston rod 28 and the second piston rod 29 inside the hydraulic cylinder 27 to move outwards according to the crank-connecting rod structure principle. During the movement of the first piston rod 28 and the second piston rod 29, the liquid inside the hydraulic cylinder 27 is driven outwards through the first oil passage 66 connected by the first oil outlet 64 and the second oil passage 67 connected by the second oil outlet 65 to the inside of the first single-acting hydraulic rod 37 and the second single-acting hydraulic rod 53. At the same time, the first piston rod 28 and the second piston rod 29... During the movement of the 29th stage, the flexible coupling 31 dampens the rotation of the first C-shaped rotating rod 21 and the second C-shaped rotating rod 22, effectively reducing the amplitude of the bumps when the fertilizer planter body 23 crosses the raised ground and suppressing the bouncing tendency of the fertilizer planter body 23. This avoids the problem of material shaking inside the fertilizer bin 24 and fluctuations in the flow of liquid fertilizer pipeline caused by the bumps, which would affect the uniformity of fertilization and liquid replenishment in each row. At the same time, it avoids the problem of rigid impact collision between the first C-shaped rotating rod 21 and the second C-shaped rotating rod 22 and the C-shaped rotating frame 19 when the fertilizer planter body 23 is violently bumped, which would accelerate the wear of the rotating mating surface. Thus, the movement stability of the fertilizer planter body 23 during the movement of uneven terrain is significantly improved and the service life of the rotating mating structure is extended.

[0035] The fertilizer planter body 23 has a first stabilizing structure on its side wall, which includes a side vertical beam 35 fixedly mounted on the side wall of the fertilizer planter body 23. A storage cavity 36 is formed inside the side vertical beam 35, containing a first single-acting hydraulic rod 37 and a vertical sliding rod 38. An auxiliary wheel 39 is rotatably mounted on the lower end of the vertical sliding rod 38. The first single-acting hydraulic rod 37 is fixedly mounted at the bottom of the storage cavity 36, while the vertical sliding rod 38 is slidably mounted to the storage cavity 36. A connecting plate 41 is fixedly mounted between the output shaft of the first single-acting hydraulic rod 37 and the upper end of the vertical sliding rod 38. A shock-absorbing spring 42 is provided inside the connecting plate 41. A first pressure relief connector 43 and a first liquid inlet connector 44 are respectively provided on the side wall of the first single-acting hydraulic rod 37, exposed outside the side vertical beam 35. The irrigation structure side wall has a second stabilizing structure, which includes a triangular rod 45 fixedly mounted on the side wall of the side vertical beam 35. The end of the triangular rod 45 is provided with a first rotating seat 46. A second rotating seat 47 is fixedly installed on the side wall of the fertilizer planter body 23. The second rotating seat 47 is located outside the side vertical beam 35. A rear beam rod 48 is symmetrically and rotatably installed on the inner side of the second rotating seat 47. A main wheel 51 is provided on the inner side of the rear beam rod 48. A connecting beam 49 is fixedly installed between the rear beam rods 48. A third rotating seat 52 is fixedly installed at the upper end of the connecting beam 49. A second single-acting hydraulic rod 53 is provided between the first rotating seat 46 and the third rotating seat 52. A rotating handle 54 is fixedly installed at the bottom of the first pressure relief connector 43 and on the output shaft. The rotating handle 54 is rotatably installed with the first rotating seat 46 and the third rotating seat 52. A second liquid inlet connector 55 and a second pressure relief connector 56 are respectively provided around the rotating handle 54. A first oil passage 66 is fixedly connected between the first oil outlet 64 and the first liquid inlet connector 44. A second oil passage 67 is provided between the second oil outlet 65 and the second liquid inlet connector 55.

[0036] As the first C-shaped rotating rod 21 and the second C-shaped rotating rod 22 rotate counterclockwise upwards and the fertilizer planter body 23 rises away from the ground, the liquid transported by the first oil circuit 66 enters the first inlet connector 44 on the first single-acting hydraulic rod 37 inside the storage cavity 36 of the side vertical beam 35, causing the output shaft of the first single-acting hydraulic rod 37 to extend. The output shaft drives the vertical slide rod 38 to slide downwards along the storage cavity 36 through the connecting plate 41, pushing the auxiliary wheel 39 at the bottom of the vertical slide rod 38 to extend and touch the ground. At the same time, when the auxiliary wheel 39 contacts the uneven ground and withstands the instantaneous impact reaction force, the connecting plate 41 and the shock-absorbing spring 42 act as a buffer. The self-compression deformation absorbs and buffers impact energy, avoiding the structural overload damage caused by rigid impacts being directly transmitted through the vertical slide bar 38 to the first single-acting hydraulic rod 37 and the fertilizer planter body 23. Simultaneously, it ensures that the auxiliary wheel 39 maintains flexible contact with the ground in undulating terrain without instantaneous ground clearance, preventing the fertilizer planter body 23 from losing lateral support and tilting after the auxiliary wheel 39 leaves the ground, thus avoiding uneven distribution of the water and fertilizer medium in the fertilizer bin 24 and resulting in uneven fertilizer application across rows. Meanwhile, the liquid transported by the second oil circuit 67 enters the interior of the second single-acting hydraulic rod 53. The rotating handles 54 at both ends are respectively matched with the first rotating seat 46 and the third rotating seat 52 to form a rotational fit. When the second single-acting hydraulic rod 53 extends out to work, it applies downward pressure to the connecting beam 49. The connecting beam 49 drives the rear beam 48 to swing downward around the second rotating seat 47 and make its inner main wheel 51 contact the ground. The rear beam 48 transmits the ground support reaction force borne by the main wheel 51 to the side wall of the fertilizer planter body 23 through the second rotating seat 47 to share the load borne by the second single-acting hydraulic rod 53. This avoids the main wheel 51 from being suspended off the ground in undulating ground due to the rear beam 48's inability to swing freely with the terrain, thus preventing fertilization from being affected. The problem of the rear of the seeder body 23 losing support and causing the whole machine to tip over longitudinally is avoided. At the same time, the problem of the auxiliary wheel 39 and the main wheel 51 alternatingly leaving the ground in undulating terrain, which would cause frequent changes in the position of the fertilizer seeder body 23 and cause drastic changes in the rotation angle of the first C-shaped rotating rod 21 and the second C-shaped rotating rod 22, resulting in a sudden rise and fall of the internal liquid pressure of the hydraulic cylinder 27 and damage to the seals, is avoided. Thus, the fertilizer seeder body 23 achieves bidirectional stable support of the front auxiliary support and the rear main support in uneven field terrain and ensures that the implement maintains a horizontal position during the movement of the implement, thereby improving the fertilizer application stability of the fertilizer seeder body 23.

[0037] The irrigation structure is equipped with a pressure relief structure, which includes a pressure relief safety valve 57. The pressure relief safety valve 57 is surrounded by two tubular pressure oil tanks 58. A pressure relief spring 59 is fixedly installed at the bottom of the tubular pressure oil tank 58. The end of the pressure relief spring 59 is equipped with a sealing piston 61, which is slidably installed inside the tubular pressure oil tank 58. One of the tubular pressure oil tanks 58 is fixedly connected to the first pressure relief connector 43 through a first pressure relief pipeline 62, and the other tubular pressure oil tank 58 is fixedly connected to the second pressure relief connector 56 through a second pressure relief pipeline 63.

[0038] When the internal working pressure of the first single-acting hydraulic rod 37 and the second single-acting hydraulic rod 53 is too high or when they are subjected to a large instantaneous downward pressure, the first pressure relief connector 43 on the side wall of the first single-acting hydraulic rod 37, through the first pressure relief pipe 62, and the second pressure relief connector 56 at the second single-acting hydraulic rod 53, through the second pressure relief pipe 63, synchronously deliver high-pressure liquid to the pressure relief safety valve 57. The high-pressure liquid acts on the sealed piston 61 inside the tubular pressure tank 58 and pushes open the compressed pressure relief spring 59 to complete the internal hydraulic pressure relief operation, effectively preventing the first single-acting hydraulic rod from collapsing. The internal pressure of rod 37 and the second single-acting hydraulic rod 53 continuously increases, exceeding the sealing pressure limit and causing the cylinder to burst or high-pressure liquid to leak. At the same time, it avoids the problem that the residual pressure difference between the first single-acting hydraulic rod 37 and the second single-acting hydraulic rod 53 is too large due to the independent depressurization of the two pipelines during the depressurization operation, which would cause the auxiliary wheel 39 and the main wheel 51 to be unbalanced and cause the fertilizer and seeder body 23 to tilt. It also avoids the problem that the rigid structure directly bears the entire impact load when the instantaneous downward pressure is too large, resulting in plastic deformation or the breakage of the connecting parts.

[0039] This application establishes an equation based on the relationship between the water output reading on the mechanical intelligent control panel and the actual output liquid volume of the machine, using the rotation of the ground wheel. The liquid volume can then be used to deduce the control panel's set reading. The test results are as follows:

[0040] 90.00 8.94 80.00 7.62 70.00 6.57 60.00 6.15 50.00 5.31 40.00 4.19 30.00 3.11

[0041] Working principle:

[0042] In the first step, during use, the suspension frame 11 is engaged with the tractor to ensure the stability of the entire machine. Simultaneously, the liquid fertilizer tank should be installed on the tractor and connected to the liquid fertilizer pipe 16. The implement moves at a constant speed with the tractor to carry out field operations. During operation, the plow hook 12 completes the field ditching. The distributor 14, relying on the dual-channel independent control of the electronic control module 15, controls the output flow of liquid fertilizer and solid fertilizer respectively. The liquid fertilizer medium transported by the liquid fertilizer pipe 16 passes through the outlet 17 and conveying pipe 26 of the distributor 14, and is sent to the isolated liquid fertilizer conveying channel inside the fertilizer planter body 23 through the independent inlet 25 on the side wall of the fertilizer bin 24. The fertilizer bin 24 only serves as a transfer structure for the liquid fertilizer pipeline and does not store solid fertilizer. Solid fertilizer is stored in the matching storage chamber of the distributor 14. After being individually flow-regulated by the electronic control module 15, it is discharged through the solid fertilizer outlet pipe 69 on the side wall of the distributor 14. The two types of fertilizers are independently applied to the furrows opened by the plow hook 12. The liquid fertilizer is applied directly to the soil layer 5cm below the seed area through the lower guide outlet of the fertilizer planter body 23, providing continuous water and fertilizer supply for seed germination. The solid fertilizer is applied to the soil layer 5-7cm to the side of the seed and the upper layer of the seed area after being guided by the solid fertilizer outlet pipe 69. This achieves precise application of fertilizer in different layers and areas, and simultaneously completes continuous operations of furrowing, side application of solid fertilizer, and bottom replenishment of liquid fertilizer. At the same time, the first C-shaped rotating rod 21 and the second C-shaped rotating rod 22, which are rotatably installed on the inner side of the C-shaped rotating frame 19, form a rotational cooperation with the fertilizer planter body 23. With the first and second stabilizing structures, the fertilizer planter body 23 can adapt to the uneven terrain of the field to meet the needs of timely sowing and precise layered liquid fertilization of summer corn in dry land and water-scarce irrigated land.

[0043] In the second step, when the fertilizer planter body 23 encounters raised ground, the first C-shaped rotating rod 21 and the second C-shaped rotating rod 22 rotate counterclockwise upwards, thereby driving the eccentric wheel 32 to rotate. The eccentric wheel 32 pulls the first rotating connecting rod 33 to move via the eccentric shaft. The first rotating connecting rod 33, in conjunction with the second rotating connecting rod 34, completes the power connection, thereby pulling the first piston rod 28 and the second piston rod 29 inside the hydraulic cylinder 27 to move outwards according to the principle of a crank-connecting rod structure. During the movement of the first piston rod 28 and the second piston rod 29, the internal components of the hydraulic cylinder 27 are driven to move outwards. The liquid is conveyed outward through the first oil passage 66 connected by the first oil outlet 64 and the second oil passage 67 connected by the second oil outlet 65. The conveyed liquid enters the first single-acting hydraulic rod 37 and the second single-acting hydraulic rod 53 through the first liquid inlet connector 44 and the second liquid inlet connector 55, respectively. At the same time, during the movement of the first piston rod 28 and the second piston rod 29, the flexible coupling 31 can dampen the rotation of the first C-shaped rotating rod 21 and the second C-shaped rotating rod 22, effectively reducing the bump amplitude of the fertilizer planter body 23 and improving the stability of operation.

[0044] Thirdly, during the synchronous process of the first C-shaped rotating rod 21 and the second C-shaped rotating rod 22 rotating counterclockwise upwards and the fertilizer planter body 23 rising away from the ground, the liquid transported by the first oil circuit 66 enters the first inlet connector 44 on the first single-acting hydraulic rod 37 inside the storage cavity 36 of the side vertical beam 35. This causes the output shaft of the first single-acting hydraulic rod 37 to extend. The output shaft drives the vertical slide rod 38 to slide downwards along the storage cavity 36 through the connecting plate 41. At the same time, the connecting plate 41 and the shock-absorbing spring 42, when the auxiliary wheel 39 contacts the uneven ground and bears the instantaneous impact reaction force from the ground surface, absorb and buffer the impact energy through its own compression deformation. This prevents the rigid impact from being directly transmitted to the first single-acting hydraulic rod 37 and the fertilizer planter body 23 through the vertical slide rod 38, ensuring that the auxiliary wheel 39 can withstand uneven surfaces. The machine maintains flexible contact with the ground throughout the terrain without generating instantaneous ground clearance, thereby improving the continuity and stability of the auxiliary wheel 39's lateral support to the fertilizer planter body 23. This, in turn, pushes the auxiliary wheel 39 at the bottom of the vertical slide bar 38 to extend and touch the ground. When the main wheel 51 moves up and down with the undulations of the ground, the rear beam 48 rotates synchronously around the second rotating seat 47. At the same time, the liquid transported by the second oil circuit 67 enters the interior of the second single-acting hydraulic rod 53. The second single-acting hydraulic rod 53, through the rotating handles 54 at both ends, respectively cooperates with the first rotating seat 46 and the third rotating seat 52 to form a rotational adaptation. While the second single-acting hydraulic rod 53 extends to work, it applies downward pressure to the connecting beam 49. The connecting beam 49 drives the rear beam 48 and the inner main wheel 51 to contact the ground, thereby achieving bidirectional stable support during the machine's movement and adapting to uneven field terrain.

[0045] Fourthly, when the internal working pressure of the first single-acting hydraulic rod 37 and the second single-acting hydraulic rod 53 is too high or the instantaneous downward pressure is large, the first pressure relief joint 43 on the side wall of the first single-acting hydraulic rod 37, through the first pressure relief pipeline 62, and the second pressure relief joint 56 at the second single-acting hydraulic rod 53, through the second pressure relief pipeline 63, synchronously deliver high-pressure liquid to the inside of the pressure relief safety valve 57. The high-pressure liquid acts on the sealing piston 61 inside the tubular pressure tank 58 and pushes open the compression relief spring 59, thereby completing the hydraulic pressure relief operation inside the equipment and reducing the pressure load on the structure. When the hydraulic pressure inside the equipment drops back to the standard range, the pressure relief spring 59 rebounds and pushes the sealing piston 61 to close, completing the pressure relief structure reset and ensuring the continuous and stable operation of the hydraulic damping structure and the stabilizing structure.

[0046] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A precision liquid fertilizer applicator for ensuring timely sowing of summer maize, comprising a suspension frame (11), wherein a plurality of plow hooks (12) are provided at the lower end of one side of the suspension frame (11), and a V-shaped bracket (13) is fixedly installed at the upper end of the suspension frame (11), characterized in that: An irrigation structure is mounted on the suspension frame (11) and the V-shaped bracket (13). The irrigation structure is arranged parallel to the plow hook (12). The irrigation structure includes a distributor (14). The distributor (14) has several liquid outlets (17) on its side wall. The suspension frame (11) has several notches (18) on its side wall. A C-shaped rotating frame (19) is fixedly installed in each notch (18). The C-shaped rotating frame (19) is rotatably assembled with a first C-shaped rotating rod (21) and a second C-shaped rotating rod (22). A fertilizer planter body (23) is hinged between the first C-shaped rotating rod (21) and the second C-shaped rotating rod (22). A solid fertilizer discharge pipe (69) is provided on the side wall of the distributor (14). The solid fertilizer discharge pipe (69) is arranged beside the plow hook (12). The suspension frame (11) has a central beam (68) on its inner side. The central beam (68) has a hydraulic damping structure. When the irrigation structure is bumpy due to uneven soil, the hydraulic damping structure will improve the stability of the irrigation structure during movement. The hydraulic damping structure includes a hydraulic cylinder (27). Multiple hydraulic cylinders (27) are fixed above the central beam (68). The inner side of the hydraulic cylinder (27) is provided with a first piston rod (28) and a second piston rod (29). The lower end of the hydraulic cylinder (27) is provided with a first oil outlet (64) and a second oil outlet (65).

2. The precision liquid fertilizer applicator for ensuring timely sowing of summer maize as described in claim 1, characterized in that, The body of the fertilizer planter (23) is equipped with only a liquid fertilizer conveying channel. The body of the fertilizer planter (23) is equipped with a lower liquid fertilizer guide outlet. The liquid fertilizer guide outlet is used to convey liquid fertilizer to the soil layer 5cm below the seed layer. Solid fertilizer is independently discharged and placed by the solid fertilizer discharge pipe (69) on the side wall of the distributor (14). The discharge end of the solid fertilizer discharge pipe (69) is arranged in the upper soil layer 5-7cm to the side of the seed. The distributor (14) is installed inside the V-shaped bracket (13). The side wall of the distributor (14) is equipped with an electrical control module (15). The electrical control module (15) is equipped with a dual-channel independent control unit, which can adjust the discharge flow rate of liquid fertilizer and solid fertilizer separately.

3. The precision liquid fertilizer applicator for ensuring timely sowing of summer maize as described in claim 1, characterized in that, The distributor (14) has a liquid replenishment pipe (16) symmetrically installed on the side wall away from the electronic control module (15); the fertilizer hopper (24) is provided at the upper end of the fertilizer planter body (23), the fertilizer hopper (24) has a liquid fertilizer flow channel inside, the side wall of the fertilizer hopper (24) has an independent liquid inlet (25), the liquid inlet (25) and the liquid outlet (17) of the distributor (14) are connected by a conveying pipe (26), the conveying pipe (26) only conducts the liquid fertilizer conveying channel inside the fertilizer planter body (23).

4. The precision liquid fertilizer applicator for ensuring timely sowing of summer maize as described in claim 3, characterized in that, Flexible couplings (31) are fixedly installed on the side walls of the first piston rod (28) and the second piston rod (29). An eccentric wheel (32) is symmetrically fixedly installed on the outer side of one side of the rotating shaft of the second C-shaped rotating rod (22). A first rotating connecting rod (33) is rotatably installed on the eccentric shaft of the eccentric wheel (32). A second rotating connecting rod (34) is rotatably installed between the flexible coupling (31) and the first rotating connecting rod (33).

5. The precision liquid fertilizer applicator for ensuring timely sowing of summer maize as described in claim 1, characterized in that, The fertilizer planter body (23) has a first stabilizing structure on its side wall. The first stabilizing structure includes a side vertical beam (35). The side vertical beam (35) is fixed on the side wall of the fertilizer planter body (23). A storage cavity (36) is opened inside the side vertical beam (35). A first single-acting hydraulic rod (37) and a vertical sliding rod (38) are provided inside the storage cavity (36). An auxiliary wheel (39) is rotatably installed at the lower end of the vertical sliding rod (38).

6. The precision liquid fertilizer applicator for ensuring timely sowing of summer maize as described in claim 5, characterized in that, The first single-acting hydraulic rod (37) is fixedly installed at the bottom of the storage cavity (36), and the vertical slide rod (38) is slidably installed with the storage cavity (36). A connecting plate (41) is fixedly installed between the output shaft of the first single-acting hydraulic rod (37) and the upper end of the vertical slide rod (38). A shock-absorbing spring (42) is provided on the inner side of the connecting plate (41). The first pressure relief connector (43) and the first liquid inlet connector (44) are respectively provided on the side wall of the first single-acting hydraulic rod (37) and exposed on the outside of the side vertical beam (35).

7. The precision liquid fertilizer applicator for ensuring timely sowing of summer maize as described in claim 6, characterized in that, The irrigation structure has a second stabilizing structure on its side wall. The second stabilizing structure includes a triangular rod (45). The triangular rod (45) is fixedly mounted on the side wall of the side vertical beam (35). The end of the triangular rod (45) is provided with a first rotating seat (46). The fertilizer planter body (23) has a second rotating seat (47) fixedly mounted on its side wall. The second rotating seat (47) is located outside the side vertical beam (35). The rear beam rod (48) is symmetrically rotated and mounted on the inner side of the second rotating seat (47). The main wheel (51) is provided on the inner side of the rear beam rod (48).

8. The precision liquid fertilizer applicator for ensuring timely sowing of summer maize as described in claim 7, characterized in that, A connecting beam (49) is fixedly installed between the rear beam rods (48). A third rotating seat (52) is fixedly installed at the upper end of the connecting beam (49). A second single-acting hydraulic rod (53) is provided between the first rotating seat (46) and the third rotating seat (52). A rotating handle (54) is fixedly installed at the bottom of the first pressure relief connector (43) and on the output shaft. The rotating handle (54) is rotatably installed with the first rotating seat (46) and the third rotating seat (52). A second liquid inlet connector (55) and a second pressure relief connector (56) are respectively provided around the rotating handle (54).

9. A precision liquid fertilizer applicator for ensuring timely sowing of summer maize as described in any one of claims 1-8, characterized in that, The irrigation structure is provided with a pressure relief structure, which includes a pressure relief safety valve (57). The pressure relief safety valve (57) is provided with two tubular pressure oil tanks (58) around its body. A pressure relief spring (59) is fixedly installed at the bottom of the tubular pressure oil tank (58). A sealing piston (61) is provided at the end of the pressure relief spring (59) and is slidably installed inside the tubular pressure oil tank (58). One of the tubular pressure oil tanks (58) is fixedly connected to the first pressure relief connector (43) with a first pressure relief pipeline (62), and the other tubular pressure oil tank (58) is fixedly connected to the second pressure relief connector (56) with a second pressure relief pipeline (63).

10. The precision liquid fertilizer applicator for ensuring timely sowing of summer maize as described in claim 9, characterized in that, A first oil passage (66) is fixedly connected between the first oil outlet (64) and the first liquid inlet (44), and a second oil passage (67) is provided between the second oil outlet (65) and the second liquid inlet (55).

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