A depth-adjustable dryland corn fertilization device

Abstract

The present invention relates to the technical field of agricultural machinery and equipment, and specifically relates to a depth-adjustable dryland corn fertilizing device; it includes a suspension frame, a vehicle body connecting frame, a drill cylinder and a positioning seat; the drill cylinder is rotatably installed on the suspension frame, and a spherical end is arranged at the bottom of the drill cylinder, and a plurality of cutting blades are respectively and obliquely fixedly installed on both sides of the spherical end; the positioning seat is vertically slidably installed in the drill cylinder, and a fertilizer filling cylinder is rotatably installed in the positioning seat. The fertilizer filling cylinder is installed in the drill cylinder in an inclined state, and the spherical structure at the end of the fertilizer filling cylinder is embedded in the spherical bin at the bottom of the positioning seat; a plurality of cutting blades on both sides of the spherical end at the bottom of the drill cylinder are used to cut and break the soil and bring it out, realizing fixed-point drilling operation; by controlling the end of the fertilizer filling cylinder to protrude towards the outside of the drill cylinder, targeted fertilization is carried out on the area that the main roots of the corn can extend to, improving the utilization rate of fertilizers and increasing the yield of corn crops.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery and equipment, and more specifically, to a depth-adjustable dryland corn fertilizing device. Background Art

[0002] Dryland soils can be generally divided into two main categories: one is the soil dominated by clay particles, which is characterized by strong fertilizer retention ability, but the soil is relatively hard and has poor water permeability; the other is the sandy soil which is relatively loose and has good water retention capacity;

[0003] In actual agricultural production, spreading nitrogen fertilizer on the surface of dryland will cause a large amount of volatilization loss of nitrogen fertilizer. At the same time, due to the accumulation of fertilizers on the soil surface layer, it is easy to be absorbed by plants such as weeds, resulting in waste of fertilizer resources; in addition, if the fertilization depth is insufficient, the nutrients in the fertilizer will be partially evaporated by sunlight irradiation, and may also be lost due to rainfall, ultimately leading to a significant reduction in the actual amount of fertilizer absorbed by crops;

[0004] In the prior art, usually after spreading fertilizers evenly on the ground surface, tillage machinery such as a plough or a rotary tiller is used to turn the soil by adjusting the working depth of the tillage machinery, so as to mix the fertilizers into the deep layer of the soil. Then, the moisture in the lower layer of the soil is used to promote the release of fertilizer efficiency, while reducing water evaporation and fertilizer loss caused by tillage;

[0005] However, for crops such as corn whose main roots are concentrated in the soil layer about 40 cm from the ground surface and have a high demand for nitrogen fertilizer, the method of tillage after large-area fertilization will cause the fertilizers to be applied to the surface soil layer where the crop roots are less distributed. This not only results in ineffective input of fertilizer resources, increases production costs, but also significantly reduces the utilization rate of nitrogen fertilizer; in addition, when tilling in soil with a clay texture, due to the hard nature of the soil, higher requirements are put forward for the power and durability of the tillage machinery, further driving up the economic cost of tillage operations; therefore, the present application provides a depth-adjustable dryland corn fertilizing device. Summary of the Invention

[0006] In order to solve the above deficiencies in the prior art, the purpose of the present invention is to provide a depth-adjustable dryland corn fertilizing device, which can adapt to small power equipment, reduce the demand for the maximum power of the power equipment engine, and through targeted fertilization in the area where the main roots of corn can extend, improve the utilization rate of fertilizers, increase the yield of corn crops, and leave holes on the ground for putting corn seeds, so as to facilitate subsequent fixed-point sowing.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0008] A depth-adjustable dryland corn fertilizing device is provided, which includes a suspension frame, a vehicle body connecting frame, a drilling cylinder and a positioning seat; vehicle body connecting frames are symmetrically installed on both sides of the suspension frame, and the vehicle body connecting frames are detachably and fixedly installed on the power equipment; the vehicle body connecting frames are connected to the side part of the suspension frame through a first hydraulic rod and a second hydraulic rod.

[0009] The drilling cylinder is rotatably installed on the suspension frame. There are multiple drilling cylinders. A ball end is integrally formed at the bottom of each drilling cylinder. A plurality of blades are respectively and obliquely fixedly installed on both sides of the ball end. The positioning seat is vertically slidably installed in the drilling cylinder. A fertilizer filling cylinder is rotatably installed in the positioning seat. The fertilizer filling cylinder is installed in the drilling cylinder in an inclined state. The spherical structure at the end of the fertilizer filling cylinder is embedded into the spherical bin at the bottom of the positioning seat. The fertilizer filling cylinder is hollow inside and open at both ends. The middle part of the fertilizer filling cylinder is slidably connected to the limiting groove on the side of the spherical bin. A first feeding pipe communicating with the spherical bin is arranged on the positioning seat, and the first feeding pipe is communicated with an external fertilizer feeding device through a communicating pipeline.

[0010] A limiting roller is fixedly installed in the drilling cylinder. The fertilizer filling cylinder is lapped on the upper side of the limiting roller, and the fertilizer filling cylinder and the limiting roller are coupled by magnetic adsorption.

[0011] Further, the power equipment can use agricultural tractors of models such as John Deere agricultural machinery tractors, Dongfanghong tractors, Zoomlion heavy machinery tractors, wheeled tractors, crawler tractors and walking tractors, and the specific equipment model is adjusted according to the number of drilling cylinders and the required fertilizing depth.

[0012] Further, the fertilizer feeding device can use a screw conveyor or a piston pump that can be purchased on the market. The screw conveyor is used to convey granular fertilizers, and the piston pump is used to convey liquid fertilizers.

[0013] Further, an elastic cover made of high-elastic rubber and plastic is fixedly installed on the side of the drilling cylinder. A through hole for the fertilizer filling cylinder to slide is arranged on the elastic cover. The end of the fertilizer filling cylinder penetrates through the elastic cover and fits with the outer side surface of the elastic cover. An annular retaining edge is slidably installed on the side of the drilling cylinder, and the inner wall of the annular retaining edge fits with the outer side surfaces of the drilling cylinder and the elastic cover.

[0014] Further, the positioning seat is detachably and fixedly installed at the bottom of the drilling cylinder. A third hydraulic rod is rotatably installed on the positioning seat, and the movable end of the third hydraulic rod is rotatably connected to the annular retaining edge.

[0015] Further, a sliding column is fixedly installed on the inner side of the drilling cylinder. A lead screw is rotatably installed on the inner side of the drilling cylinder. The sliding column is slidably connected to the positioning seat. The lead screw is in threaded transmission connection with the positioning seat. A second rotation driver for driving the lead screw to rotate is installed in the drilling cylinder;

[0016] Further, the fixed ends of the first hydraulic rod and the second hydraulic rod are rotatably connected to the vehicle body frame, and the movable ends of the first hydraulic rod and the second hydraulic rod are rotatably connected to the suspension frame.

[0017] Further, the installation distance between the fixed ends of the first hydraulic rod and the second hydraulic rod is greater than the installation distance between the movable ends of the first hydraulic rod and the second hydraulic rod, so as to adjust the vertical height and horizontal angle of the suspension frame by starting the first hydraulic rod and the second hydraulic rod.

[0018] Further, an external toothed ring is fixedly installed at the upper end of the side of the drill cylinder, and a first rotation driver for driving the external toothed ring to rotate is installed on the suspension frame. A gear is connected to the output shaft of the first rotation driver, and the gear and the external toothed ring are connected by a transmission belt.

[0019] For the communication pipeline in this application, an alternative technical solution is that the communication pipeline is a pressure rubber hose I.

[0020] For the communication pipeline in this application, another alternative technical solution is that the communication pipeline includes a second feeding pipe and a feeding joint; a dust-proof cover is detachably installed at the top of the drill cylinder, the second feeding pipe is fixedly installed at the bottom of the dust-proof cover, the feeding joint is rotatably installed in the middle of the dust-proof cover, the top of the second feeding pipe covers the outside of the bottom of the feeding joint, and the feeding joint is connected to an external fertilizer feeding device through a pressure rubber hose II, and the first feeding pipe and the second feeding pipe are connected through a pressure rubber hose III.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. For the depth-adjustable dryland corn fertilizing device according to the embodiment of the present invention, the drill cylinder is controlled to descend during rotation, and multiple blades on both sides of the spherical end at the bottom of the drill cylinder are used to cut and break the soil and bring it out, realizing fixed-point drilling operation; by adjusting the drilling depth of the drill cylinder, subsequent fertilization operations can be carried out on the soil at a specified depth; compared with traditional tillage equipment, it can run more slowly, will not fly soil and stones, and avoid the situation of getting stuck with stones or broken teeth, increasing the safety of use.

[0023] 2. For the depth-adjustable dryland corn fertilizing device according to the embodiment of the present invention, the positioning seat is controlled to move vertically. Under the action of the limiting roller, the swinging angle of the fertilizer filling cylinder is increased until the bottom of the fertilizer filling cylinder extends outwards towards the outside of the drill cylinder, and targeted fertilization operations are carried out on the area that the main roots of the corn can extend to, improving the utilization rate of fertilizers and increasing the yield of corn crops; during the fixed-point drilling operation, the fertilizer filling cylinder is retracted into the drill cylinder to avoid damage to the fertilizer filling cylinder and has a high service life.

[0024] 3. The depth-adjustable dryland corn fertilization device of the present invention utilizes the drilling of a drill barrel to replace plowing and rotary tillage, and performs targeted fertilization through fixed-point operations on a small area of ​​farmland. There is no need to turn over a large area of ​​deep soil layers, thereby reducing the demand for the maximum power of the power equipment engine, allowing the device to be installed on a small power equipment for use, reducing operating costs and increasing equipment adaptability.

[0025] 4. The depth-adjustable dryland corn fertilization device of the present invention changes the protruding length of the fertilizer injection tube according to the vertical position of the positioning seat in the drill tube, adjusts the distance between the fertilization position and the outer wall of the drill tube, and adapts to a variety of corn seed varieties with different maximum root growth lengths.

[0026] 5. In the depth-adjustable dryland corn fertilization device of the example of the present invention, the ball end protrudes toward the outer end of the drill barrel side wall, so that during the drilling process of the drill barrel, a hole with a diameter slightly larger than the diameter of the drill barrel side wall is left on the ground, so that there can be a certain distance between the outer wall of the drill barrel and the inner wall of the hole, which is conducive to digging out the soil.

[0027] 6. The depth-adjustable dryland corn fertilization device of the present invention, after completing the fertilizer application operation, adjusts the position of the suspension frame so that the bottom of the drill tube contacts the ground. As the power equipment moves, the bottom of the drill tube is driven to sweep across the ground surface, and the soil brought out by the fixed-point drilling operation is backfilled to prevent the nutrients in the fertilizer from being partially evaporated due to sunlight.

[0028] 7. The depth-adjustable dryland corn fertilization device of the present invention leaves holes on the ground for dropping corn seeds after completing the fixed-point drilling operation, and cuts and breaks the soil through multiple blades and takes it out, making the soil loose, which is easy for the corn seeds to germinate during the subsequent fixed-point corn sowing.

[0029] 8. The depth-adjustable dryland corn fertilization device of the present invention respectively activates the first hydraulic rod and the second hydraulic rod to adjust the angle between the suspension frame and the horizontal plane, change the drilling angle of the drill tube, and cope with the corn planting environment on the slope.

[0030] 9. In the depth-adjustable dryland corn fertilizing device of the example of the present invention, the elastic cover is provided with a through hole for the fertilizer injection tube to slide. When the fertilizer injection tube protrudes out of the outside of the drill tube and is retracted, the fertilizer injection tube moves the elastic cover, and the elastic deformation of the elastic cover is utilized to change the position and size of the through hole, thereby maintaining a stable fit between the elastic cover and the outer side surface of the fertilizer injection tube, preventing soil from entering the drill tube through the through hole, and ensuring the cleanliness of the inside of the equipment.

[0031] 10. The depth-adjustable dryland corn fertilizing device according to the example of the present invention, the annular baffle can block the bottom opening of the fertilizer filling cylinder, preventing soil from entering the fertilizer filling cylinder during the fixed-point drilling operation of the drilling cylinder, so that the fertilizing operation of the fertilizer filling cylinder can be smoother.

[0032] 11. The depth-adjustable dryland corn fertilizing device according to the example of the present invention, the fertilizer feeding device uses a metering screw conveyor or a piston pump to control the application amount of the fertilizer, can apply a large pushing force to the fertilizer, prevent the fertilizer from clogging in the pipeline, and at the same time prevent the soil from clogging the bottom opening of the fertilizer filling cylinder.

[0033] 12. The depth-adjustable dryland corn fertilizing device according to the example of the present invention, when the end of the fertilizer filling cylinder extends outwards from the drilling cylinder, rotate the drilling cylinder to perform targeted fertilization on the area that the main roots of the corn can extend to in a circular trajectory, ensuring the uniformity and effectiveness of the fertilizer distribution, making the development state of the corn roots balanced in all directions, and since the fertilizer filling cylinder rotates together with the drilling cylinder, the reaction force exerted by the soil on the fertilizer filling cylinder is perpendicular to the outer wall of the fertilizer filling cylinder, thus not having an adverse effect on the fertilizer discharged from the bottom opening of the fertilizer filling cylinder.

[0034] 13. The depth-adjustable dryland corn fertilizing device according to the example of the present invention, a sliding column is additionally provided in the drilling cylinder. During the targeted fertilization operation in a circular trajectory, the sliding column is used to limit the sway of the positioning seat, preventing the outer wall of the positioning seat from scraping the local inner wall of the drilling cylinder and increasing the stability of the fertilizing operation.

[0035] 14. The depth-adjustable dryland corn fertilizing device according to the example of the present invention, using the magnetic adsorption connection between the electromagnet and the fertilizer filling cylinder, enables the fertilizer filling cylinder to stably abut against the upper side of the limiting roller, increasing the limiting effect on the fertilizer filling cylinder and improving the accuracy of the position control of the fertilizer filling cylinder extending out of the drilling cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects, and advantages of the present application will become more apparent:

[0037] Figure 1 It is a schematic structural diagram of the overall depth-adjustable dryland corn fertilizing device provided by the embodiment of the present invention;

[0038] Figure 2 It is a schematic structural diagram of the drilling cylinder, elastic cover, and annular baffle provided by the embodiment of the present invention;

[0039] Figure 3 It is a schematic cross-sectional view of the state where the fertilizer filling cylinder is retracted into the drilling cylinder provided by the embodiment of the present invention;

[0040] Figure 4 It is a partial enlarged view of the positioning seat, the first feeding pipe and the second feeding pipe provided by the embodiment of the present invention;

[0041] Figure 5 It is a schematic cross-sectional view of the fertilizer filling cylinder provided by the embodiment of the present invention in a state of protruding outward from the drill cylinder;

[0042] Figure 6 It is a schematic structural view of the annular retaining edge, the positioning seat and the third hydraulic rod provided by the embodiment of the present invention;

[0043] Figure 7 It is a schematic structural view of the positioning seat, the sliding column and the lead screw provided by the embodiment of the present invention.

[0044] In the figure: 11 suspension frame, 12 first hydraulic rod, 13 second hydraulic rod, 14 vehicle body connecting frame, 15 first rotation driver, 16 gear, 17 transmission belt, 21 drill cylinder, 22 external tooth ring, 23 ball end, 24 cutting edge, 25 elastic cover, 26 annular retaining edge, 27 positioning seat, 28 third hydraulic rod, 29 limiting roller, 31 positioning seat, 32 fertilizer filling cylinder, 33 spherical bin, 34 limiting groove, 35 first feeding pipe, 36 second feeding pipe, 37 feeding joint, 41 sliding column, 42 lead screw, 43 second rotation driver. Detailed implementation manners

[0045] Next, the technical solutions of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments.

[0046] Generally, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention.

[0047] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0049] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0050] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Additionally, it should be noted that for the convenience of description, only the parts related to the invention are shown in the drawings.

[0051] Embodiment 1:

[0052] As Figure 1-7 shown, this embodiment provides a depth-adjustable dryland corn fertilizing device, including a suspension frame 11, a vehicle body connecting frame 14, a drill cylinder 21, and a positioning seat 31; the two sides of the suspension frame 11 are symmetrically installed with vehicle body connecting frames 14, and the vehicle body connecting frame 14 is connected to the power equipment; the vehicle body connecting frame 14 is connected to the side of the suspension frame 11 through a first hydraulic rod 12 and a second hydraulic rod 13. The fixed ends of the first hydraulic rod 12 and the second hydraulic rod 13 are rotatably connected to the vehicle body connecting frame 14, and the movable ends of the first hydraulic rod 12 and the second hydraulic rod 13 are rotatably connected to the suspension frame 11.

[0053] As Figure 1As shown, the drill barrel 21 is rotatably mounted on the suspension frame 11, and a plurality of drill barrels 21 are provided. A ball end 23 is integrally formed at the bottom of each drill barrel 21, and a plurality of blades 24 are obliquely fixedly mounted on both sides of the ball end 23. An outer gear ring 22 is fixedly mounted on the upper end of the side of the drill barrel 21, and a first rotation driver 15 for driving the outer gear ring 22 to rotate is installed on the suspension frame 11. A gear 16 is connected to the output shaft of the first rotation driver 15, and the gear 16 and the outer gear ring 22 are connected to each other through a transmission belt 17. The rotation driver of the present application can be an electric motor such as a stepping motor, a servo motor, or a hydraulic motor such as a vane hydraulic motor or a plunger hydraulic motor.

[0054] like Figures 3-5 As shown, the positioning seat 31 is vertically slidably installed in the drill barrel 21, and a fertilizer filling cylinder 32 is rotatably installed in the positioning seat 31. The fertilizer filling cylinder 32 is installed in the drill barrel 21 in an inclined state. The spherical structure at the end of the fertilizer filling cylinder 32 is embedded in the spherical bin 33 at the bottom of the positioning seat 31. The fertilizer filling cylinder 32 is hollow inside and open at both ends. The middle part of the fertilizer filling cylinder 32 is slidably connected with the limiting groove 34 on the side of the spherical bin 33. A first feeding pipe 35 connected to the spherical bin 33 is provided on the positioning seat 31, and the first feeding pipe 35 is connected to an external fertilizer feeding device through a connecting pipeline.

[0055] like Figure 5 As shown, a limiting roller 29 is fixedly installed in the drill barrel 21, and the fertilizer filling tube 32 is overlapped on the upper end of the side of the limiting roller 29, and the fertilizer filling tube 32 and the limiting roller 29 are connected by magnetic adsorption coupling; specifically, an electromagnet is arranged in the limiting roller 29, and the electromagnet is connected to the fertilizer filling tube 32 made of iron, cobalt and nickel by magnetic adsorption coupling, so that the fertilizer filling tube 32 can stably abut against the upper side of the limiting roller 29, thereby increasing the limiting effect of the fertilizer filling tube 32 and improving the accuracy of controlling the position of the fertilizer filling tube 32 protruding from the outside of the drill barrel 21.

[0056] like Figure 7 As shown, a screw rod 42 is rotatably installed inside the drill tube 21 , and the screw rod 42 is connected to the positioning seat 31 through threaded transmission. A second rotation driver 43 for driving the screw rod 42 to rotate is installed in the drill tube 21 .

[0057] When using the depth-adjustable dryland corn fertilizer application device of the present application to apply fertilizer to a specified depth of the soil:

[0058] First, use the drill barrel 21 to perform fixed-point drilling on the soil; start the first rotation driver 15 to control the rotation of the drill barrel 21, then start the first hydraulic rod 12 and the second hydraulic rod 13 to control the descent of the drill barrel 21 during rotation, and use the multiple cutting blades 24 on both sides of the spherical end 23 at the bottom of the drill barrel 21 to cut and break the soil and bring it out, realizing the fixed-point drilling operation. Compared with traditional tillage equipment, it can operate more slowly, thereby reducing the wear on the equipment itself, not flying soil and stones, and avoiding the situation of getting stuck with stones or broken teeth, increasing the safety of use.

[0059] Among them, after completing the fixed-point drilling operation, holes for putting corn seeds can be left on the ground, and by using the multiple cutting blades 24 to cut and break the soil and bring it out, the soil can be made loose; then through corn fixed-point sowing, the fertilizer can be mainly absorbed by corn crops and other crops, and because the depth of fertilizer application is large, the fertilizer scattered in the soil can be avoided being absorbed by weeds, alleviating the problem of overgrown weeds and reducing the competitive harm to corn crops.

[0060] After that, use the fertilizer injection barrel 32 to perform targeted fertilization on the soil layer at a specified depth; start the second rotation driver 43 to control the rotation of the lead screw 42, control the positioning seat 31 to move in the drill barrel 21 towards the direction close to the spherical end 23, and under the action of the limiting roller 29, the swing angle of the fertilizer injection barrel 32 increases until the end of the fertilizer injection barrel 32 protrudes towards the outside of the drill barrel 21; start the fertilizer feeding device to apply the fertilizer from the fertilizer injection barrel 32 into the soil at a specified depth, and perform targeted fertilization on the area that the main roots of the corn can extend to, improving the utilization rate of the fertilizer and increasing the yield of corn crops.

[0061] Among them, by adjusting the drilling depth of the drill barrel 21, fertilization operations are carried out on soils at different depths.

[0062] Among them, the swing angle of the fertilizer injection barrel 32 is adjustable, so that during the fixed-point drilling operation, the fertilizer injection barrel 32 can be retracted into the drill barrel 21 to avoid damage to the fertilizer injection barrel 32 and have a high service life.

[0063] Among them, the fertilizer feeding device uses a quantitative screw conveyor or a piston pump. The screw conveyor is used to convey granular fertilizers, and the piston pump is used to convey liquid fertilizers, applying a large pushing force to the fertilizer to avoid blockage of the fertilizer in the pipeline and at the same time avoid blockage of the bottom opening of the fertilizer injection barrel 32 by the soil.

[0064] Finally, the drill tube 21 is used to backfill the soil brought out by the fixed-point drilling operation; the first hydraulic rod 12 and the second hydraulic rod 13 are started, and the position of the suspension frame 11 is adjusted so that the bottom of the drill tube 21 is in contact with the ground. As the power equipment travels, the bottom of the drill tube 21 is driven to sweep across the surface to backfill the soil brought out by the fixed-point drilling operation, thereby preventing the nutrients in the fertilizer from being partially evaporated due to sunlight, and further improving the utilization rate of the fertilizer.

[0065] like Figure 3 and Figures 5-6 As shown, an elastic cover 25 of highly elastic rubber and plastic material is fixedly installed on the side of the drill barrel 21, and a through hole is provided on the elastic cover 25 for the fertilizer filling tube 32 to slide. The end of the fertilizer filling tube 32 passes through the elastic cover 25 and fits with the outer side surface of the elastic cover 25. An annular retaining edge 26 is slidably installed on the side of the drill barrel 21. The annular retaining edge 26 can cover the bottom opening of the fertilizer filling tube 32 to prevent soil from entering the fertilizer filling tube 32 during the fixed-point drilling operation of the drill barrel 21, so that the fertilization operation of the fertilizer filling tube 32 can be smoother. The inner wall of the annular retaining edge 26 fits with the outer side surfaces of the drill barrel 21 and the elastic cover 25. A positioning seat 27 is detachably and fixedly installed at the bottom of the drill barrel 21, and a third hydraulic rod 28 is rotatably installed on the positioning seat 27. The movable end of the third hydraulic rod 28 is rotatably connected to the annular retaining edge 26.

[0066] The third hydraulic rod 28 is started to control the annular baffle 26 to slide on the outside of the drill tube 21 along the axial direction of the drill tube 21, and the bottom opening of the fertilizer filling tube 32 is covered by the annular baffle 26 to prevent soil from entering the fertilizer filling tube 32 during the fixed-point drilling operation of the drill tube 21, so that the fertilization operation of the fertilizer filling tube 32 can be smoother.

[0067] In order to prevent soil from entering the drill tube 21 and causing pollution inside the equipment, thus affecting the normal operation of the equipment:

[0068] The thickness of the elastic cover 25 at the hole is set to be thicker. When the fertilizer filling tube 32 extends out of the outside of the drill tube 21 and is retracted, the side wall of the fertilizer filling tube 32 pushes the elastic cover 25. The elastic deformation property of the elastic cover 25 is utilized to change the position and size of the hole as the fertilizer filling tube 32 swings, thereby maintaining a stable fit between the elastic cover 25 and the outer side surface of the fertilizer filling tube 32, preventing soil from entering the drill tube 21 from the hole, and ensuring the cleanliness of the inside of the equipment.

[0069] In this embodiment, by adjusting the vertical position of the positioning seat 31 in the drill barrel 21, changing the protruding length of the fertilizer injection tube 32, and changing the distance between the fertilization position and the outer wall of the drill barrel 21, it is possible to adapt to a variety of corn seed varieties with different maximum root growth lengths and improve the use effect of the equipment.

[0070] In order to enhance the fertilization effect on the area that the main roots of corn can extend to; while the end of the fertilizer injection tube 32 extends outward from the drill tube 21, the drill tube 21 is controlled to rotate around its own axis, driving the fertilizer injection tube 32 to rotate synchronously, and performing targeted fertilization on the area that the main roots of corn can extend to in a circular trajectory, ensuring the uniformity and effectiveness of fertilizer distribution, and making the growth states of corn roots in all directions remain balanced;

[0071] Since the fertilizer injection tube 32 rotates together with the drill tube 21, the reaction force exerted by the soil on the fertilizer injection tube 32 is perpendicular to the outer wall of the fertilizer injection tube 32 and will not have an adverse effect on the fertilizer discharged from the bottom opening of the fertilizer injection tube 32, ensuring the stability and safety of the fertilization process;

[0072] The above solution helps to improve the yield and quality of corn, and at the same time reduces the waste of fertilizers and the risk of environmental pollution.

[0073] In addition, due to the relatively high hardness of the soil dominated by cohesive soil particles, even if the fertilizer injection tube 32 performs fertilization operations in the relatively moist soil below the ground surface, in order to ensure the service life of the equipment and stably limit the fertilizer injection tube 32;

[0074] As Figure 7 shown, a sliding column 41 is fixedly installed inside the drill tube 21, and the sliding column 41 is slidably connected to the positioning seat 31. During the process of targeted fertilization operation in a circular trajectory, the sliding column 41 is used to limit the sway of the positioning seat 31, preventing the outer wall of the positioning seat 31 from scraping the local inner wall of the drill tube 21, and combining with the limiting groove 34 to stably limit the fertilizer injection tube 32, preventing the fertilizer injection tube 32 from twisting and increasing the stability of the fertilization operation.

[0075] In order to facilitate the smooth excavation of soil during the fixed-point drilling operation of the drill tube 21; the spherical end 23 is set to protrude towards the outer end of the side wall of the drill tube 21, so that during the drilling process of the drill tube 21, a hole with a diameter slightly larger than the diameter of the side wall of the drill tube 21 is left on the ground, enabling a certain spacing between the outer wall of the drill tube 21 and the inner wall of the hole, providing a channel for the soil to be discharged to the ground surface, preventing the formation of hardened holes on the ground and making the fertilization operation of the fertilizer injection tube 32 smoother.

[0076] To sum up, through small-area fixed-point operations on farmland, targeted fertilization, and using the drilling of the drill tube 21 to replace ploughing and rotary tillage, there is no need to turn over large areas of deep soil layers, thereby reducing the demand for the maximum power of the power equipment engine, enabling the equipment to be installed on small power equipment for use, reducing the operation cost, and increasing the adaptability.

[0077] In this embodiment, the connecting pipeline is the pressure rubber hose I, and the first feeding pipe 35 is connected to the external fertilizer feeding equipment by using the pressure rubber hose I; the pressure rubber hose uses products that can be purchased on the market. Since the pressure rubber hose has the ability to bend and can ensure the stability of the diameter size, so as to control the amount of fertilizer applied.

[0078] Embodiment 2:

[0079] The features that are the same as those in Embodiment 1 will not be described in detail. The different solutions in this embodiment from Embodiment 1 are as follows: As Figure 4 shown, in this embodiment, the connecting pipeline includes a second feeding pipe 36 and a feeding joint 37; a dust-proof cover is detachably installed at the top of the drill barrel 21. The second feeding pipe 36 is fixedly installed at the bottom of the dust-proof cover. The feeding joint 37 is rotatably installed in the middle of the dust-proof cover. The top of the second feeding pipe 36 covers the outside of the bottom of the feeding joint 37. The feeding joint 37 is connected to the external fertilizer feeding equipment through a pressure rubber hose II. The first feeding pipe 35 and the second feeding pipe 36 are connected through a pressure rubber hose III. The pressure rubber hose III is coiled between the dust-proof cover and the positioning seat 31.

[0080] In this embodiment, the feeding joint 37 can rotate relative to the drill barrel 21, avoiding self-winding of the pressure rubber hose II during the fixed-point drilling operation of the drill barrel 21.

[0081] Embodiment 3:

[0082] The features that are the same as those in Embodiment 1 will not be described in detail. The different solutions in this embodiment from Embodiment 1 are as follows: As Figure 1 shown, in this embodiment, the installation distance between the fixed ends of the first hydraulic rod 12 and the second hydraulic rod 13 is greater than the installation distance between the movable ends of the first hydraulic rod 12 and the second hydraulic rod 13. By starting the first hydraulic rod 12 and the second hydraulic rod 13, the angle between the suspension bracket 11 and the horizontal plane is adjusted to change the drilling angle of the drill barrel 21 to cope with the corn planting environment on the slope terrain.

[0083] The above description is only for the preferred embodiments of the present application and the description of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but also should cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the present application.

[0084] Except for the technical features described in the specification, the remaining technical features are well-known to those skilled in the art. To highlight the innovative features of the present invention, the remaining technical features will not be elaborated herein.

Claims

1. A depth-adjustable dryland corn fertilizing device, characterized in that, It includes a suspension frame (11) and vehicle body connecting frames (14) arranged on both sides of the suspension frame (11). The vehicle body connecting frames (14) are connected to power equipment, and the vehicle body connecting frames (14) are connected to the side of the suspension frame (11) through a first hydraulic rod (12) and a second hydraulic rod (13); A plurality of drill cylinders (21) are rotatably installed on the suspension frame (11). A ball end (23) is integrally formed at the bottom of the drill cylinder (21), and a plurality of cutting edges (24) are respectively and obliquely fixedly installed on both sides of the ball end (23); A positioning seat (31) is vertically slidably installed in the drill cylinder (21). A fertilizer filling cylinder (32) is rotatably installed in the positioning seat (31). The spherical structure at the end of the fertilizer filling cylinder (32) is embedded in the spherical bin (33) at the bottom of the positioning seat (31). The fertilizer filling cylinder (32) is hollow inside and open at both ends. The fertilizer filling cylinder (32) is slidably connected to the limiting groove (34) on the side of the spherical bin (33). A first feeding pipe (35) communicating with the spherical bin (33) is arranged on the positioning seat (31), and the first feeding pipe (35) is connected to an external fertilizer feeding device through a communicating pipeline; The fertilizer filling cylinder (32) is installed in the drill cylinder (21) in an inclined state; A limiting roller (29) is fixedly installed in the drill cylinder (21), and the fertilizer filling cylinder (32) is magnetically adsorbed and lapped on the upper side of the limiting roller (29); During the process of the positioning seat (31) moving towards the direction close to the ball end (23), under the action of the limiting roller (29), the bottom of the fertilizer filling cylinder (32) protrudes outwards towards the outside of the drill cylinder (21). After the fertilization operation is completed, the fertilizer filling cylinder (32) can be retracted into the drill cylinder (21) again.

2. The depth-adjustable dryland corn fertilization device according to claim 1, characterized in that An elastic cover (25) is fixedly installed on the side of the drill cylinder (21), and the bottom of the fertilizer filling cylinder (32) penetrates through the elastic cover (25) and fits with the outer side surface of the elastic cover (25); An annular retaining edge (26) for blocking the bottom opening of the fertilizer filling cylinder (32) is slidably installed on the side of the drill cylinder (21), and the inner wall of the annular retaining edge (26) fits with the outer side surface of the elastic cover (25).

3. The depth-adjustable dryland corn fertilizing device according to claim 1, characterized in that, A positioning seat (27) is fixedly installed at the bottom of the drill cylinder (21), and a third hydraulic rod (28) is rotatably installed on the positioning seat (27). The movable end of the third hydraulic rod (28) is rotatably connected to the annular retaining edge (26).

4. The depth-adjustable dryland corn fertilizing device according to claim 1, characterized in that A sliding column (41) is fixedly installed on the inner side of the drill cylinder (21), a lead screw (42) is rotatably installed on the inner side of the drill cylinder (21). The sliding column (41) is slidably connected to the positioning seat (31), the lead screw (42) is in threaded transmission connection with the positioning seat (31), and a second rotation driver (43) for driving the lead screw (42) to rotate is installed in the drill cylinder (21).

5. The depth-adjustable dryland corn fertilization device according to claim 1, wherein, The fixed ends of the first hydraulic rod (12) and the second hydraulic rod (13) are rotatably connected to the vehicle body connecting frame (14), and the movable ends of the first hydraulic rod (12) and the second hydraulic rod (13) are rotatably connected to the suspension frame (11).

6. The depth-adjustable dryland corn fertilization device according to claim 5, characterized in that, The installation distance between the fixed ends of the first hydraulic rod (12) and the second hydraulic rod (13) is greater than the installation distance between the movable ends of the first hydraulic rod (12) and the second hydraulic rod (13).

7. The depth-adjustable dryland corn fertilization device according to claim 1, characterized in that An external toothed ring (22) is fixedly installed at the upper end of the side of the drill cylinder (21). A first rotation driver (15) for driving the rotation of the external toothed ring (22) is installed on the suspension bracket (11). A gear (16) is connected to the output shaft of the first rotation driver (15). The gear (16) and the external toothed ring (22) are connected by a transmission belt (17) for transmission connection.

8. The depth-adjustable dryland corn fertilizing device according to claim 1, wherein, The communication pipeline is a pressure rubber hose I.

9. The depth-adjustable dryland corn fertilizing device according to claim 1, characterized in that, The communication pipeline includes a second feed pipe (36) and a feed joint (37); A dust cover is detachably installed at the top of the drill cylinder (21). The second feed pipe (36) is fixedly installed at the bottom of the dust cover. The feed joint (37) is rotatably installed in the middle of the dust cover. The top of the second feed pipe (36) covers the outside of the bottom of the feed joint (37). The feed joint (37) is connected to an external fertilizer feeding device through a pressure rubber hose II. The first feed pipe (35) and the second feed pipe (36) are connected through a pressure rubber hose III.

10. The depth-adjustable dryland corn fertilizing device according to claim 1, wherein, An electromagnet is arranged inside the limiting roller (29). The electromagnet and the fertilizer filling cylinder (32) made of iron-cobalt-nickel are coupled by magnetic adsorption connection.

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