Efficient quantitative corn layered fertilizer device

Abstract

This application discloses a high-efficiency quantitative stratified fertilization device for corn, including a frame, a drive motor, a transmission unit, a feed hopper, and three fertilizer pipes. Each fertilizer pipe is connected to the feed hopper by a discharge pipe, and a valve is installed at the discharge pipe. The drive motor drives the first rotating shafts of the three fertilizer pipes to rotate via the transmission unit. This fertilization device utilizes the drive motor to simultaneously drive the first rotating shafts of the three fertilizer pipes, and by selecting transmission units with different transmission ratios, the amount of fertilizer applied through the fertilizer pipes can be adjusted, and stratified fertilization can be achieved. A fan-shaped sealing plate can intermittently close and fix the gaps in the fan-shaped plate, thereby achieving intermittent fertilization and avoiding fertilizer waste. Blockage of the fertilizer pipes can be detected, and when blockage occurs, a blower can be used to clear the bottom of the second conveying pipe and the bottom of the air outlet channel, allowing the fertilizer in the buffer space to exit through the discharge chute, thus ensuring the normal operation of the entire device.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery and equipment, and more specifically, to a high-efficiency quantitative stratified fertilization device for corn. Background Technology

[0002] Maize (scientific name: *Zea mays* L.) is a plant belonging to the Poaceae family and the *Zea* genus, commonly known as corn. Maize originated in Central and South America and is widely cultivated in tropical and temperate regions worldwide. It has high nutritional value and is an excellent food crop.

[0003] Layered fertilization for maize crops can better meet the nutrient needs of different growth stages. However, current layered fertilization devices are prone to clogging of the fertilizer pipes, with the characteristics of the fertilizer itself being a key factor. Some fertilizers are prone to clumping during storage or transportation due to moisture or other factors. These large clumps of fertilizer, once inside the fertilizer pipe, have difficulty passing through narrow channels, causing blockages. Furthermore, the distribution ratio and fertilizer supply sometimes fail to meet actual needs. Regarding the adjustment of the distribution ratio, existing devices mostly rely on mechanical structures, which are complex to operate and have low adjustment precision. Changing the fertilizer distribution ratio between different fertilization layers often requires disassembling and replacing multiple parts, which is not only time-consuming and labor-intensive but also makes precise adjustment difficult. This results in maize not receiving sufficient and appropriate nutrients, thus affecting its growth, development, and yield. Summary of the Invention

[0004] The present invention aims to overcome the shortcomings of the prior art and provide a highly efficient quantitative stratified fertilization device for corn.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a layered fertilization device, comprising a frame, a drive motor, a transmission unit, a material bin, and three fertilization pipes. Each fertilization pipe includes a first conveying pipe, a connecting conveying pipe, and a second conveying pipe. A first rotating shaft is installed inside the first conveying pipe, and a first spiral blade is installed at the first rotating shaft. A first conical tooth is fixed at the end of the first rotating shaft. A second rotating shaft is installed inside the second conveying pipe, and a second spiral blade is installed at the second rotating shaft. A second conical tooth that mates with the first conical tooth is fixed at the end of the second rotating shaft. A discharge pipe is connected between the first conveying pipe and the material bin of each fertilization pipe, and a valve is installed at the discharge pipe. The drive motor drives the first rotating shafts of the three fertilization pipes to rotate through the transmission unit.

[0006] Furthermore, the connecting conveying pipe is connected to the first conveying pipe, and the second conveying pipe is connected to the connecting conveying pipe.

[0007] Furthermore, the first rotating shaft passes through the connecting conveying pipe, and the second rotating shaft passes through the connecting conveying pipe.

[0008] Furthermore, the connecting conveying pipe is an arc-shaped pipe.

[0009] Furthermore, both the first and second conveying pipes are straight pipes.

[0010] Furthermore, a vibrator is installed at the material bin.

[0011] The vibrator generates vibrations during the operation of the device, which helps to ensure the smooth feeding of fertilizer.

[0012] Furthermore, the first conveying pipe is a horizontal pipe, and the second conveying pipe is a vertical pipe.

[0013] Furthermore, the first and second shafts of the same fertilizer application pipe rotate at the same speed.

[0014] This ensures the continuity and stability of fertilizer during transportation.

[0015] Furthermore, the frame includes two side plates, a first mounting plate connecting the two side plates, a second mounting plate connecting the two side plates, and a third mounting plate connecting the two side plates. The first delivery pipes of the three fertilizer pipes are all fixed at the first mounting plate, and the first rotating shafts of the three fertilizer pipes all pass through the second mounting plate. Three drive rotating shafts are installed at the third mounting plate. The transmission unit includes three transmission rotating shafts, one end of which is connected to the drive rotating shaft, and the other end is connected to the first rotating shaft. The three transmission rotating shafts are the first transmission rotating shaft, the second transmission rotating shaft, and the third transmission rotating shaft. A first synchronous pulley is installed at the first transmission rotating shaft, a second synchronous pulley and a third synchronous pulley are installed at the second transmission rotating shaft, and a fourth synchronous pulley is installed at the third transmission rotating shaft. A first synchronous belt is installed between the first and second synchronous pulleys, and a second synchronous belt is installed between the third and fourth synchronous pulleys. The drive motor drives one of the drive rotating shafts.

[0016] Furthermore, the three fertilizer tubes are designated as the first fertilizer tube, the second fertilizer tube, and the third fertilizer tube. The rotational speed of the first shaft of the first fertilizer tube is greater than that of the first shaft of the second fertilizer tube, and the rotational speed of the first shaft of the second fertilizer tube is greater than that of the first shaft of the third fertilizer tube.

[0017] This allows for precise fertilization based on the fertilizer requirements of different soil layers, thereby improving fertilizer utilization.

[0018] Furthermore, the rotational speed of the first shaft of the first fertilizer tube is 2.5 times that of the first shaft of the third fertilizer tube; the rotational speed of the first shaft of the second fertilizer tube is 1.5 times that of the first shaft of the third fertilizer tube.

[0019] Furthermore, the frame also includes a motor frame fixedly connected to the third mounting plate, and the drive motor is mounted on the motor frame; the three fertilizer pipes are a first fertilizer pipe, a second fertilizer pipe and a third fertilizer pipe, and the height difference between the second delivery pipe of the first fertilizer pipe and the second delivery pipe of the second fertilizer pipe is equal to the height difference between the second delivery pipe of the second fertilizer pipe and the second delivery pipe of the third fertilizer pipe.

[0020] This allows for stratified fertilization at different depths.

[0021] Furthermore, the height difference between the second delivery pipe of the first fertilizer pipe and the second delivery pipe of the second fertilizer pipe is 10-15 cm. Preferably, it is 10 cm.

[0022] Furthermore, the height difference between the second delivery pipe of the second fertilizer pipe and the second delivery pipe of the third fertilizer pipe is 10-15 cm. Preferably, it is 10 cm.

[0023] Furthermore, a first bearing is installed between the third mounting plate and the drive shaft, a second bearing is installed between the second mounting plate and the first shaft, an end plate is fixed to one end of the first conveying pipe, a third bearing is installed between the end plate and the first shaft, a fourth bearing is installed between the first shaft and the connecting conveying pipe, and a fifth bearing is installed between the second shaft and the connecting conveying pipe.

[0024] This helps drive the rotating shaft, the first rotating shaft, and the second rotating shaft to rotate more stably.

[0025] Furthermore, both ends of the transmission shaft are fixed with end flanges, the end of the drive shaft is fixed with a first flange that is fixed to the end flange, and the end of the first shaft is fixed with a second flange that is fixed to the end flange.

[0026] Furthermore, a retaining ring is connected to the bottom end of the second conveying pipe via a radial rod, and a sixth bearing is installed between the retaining ring and the second rotating shaft.

[0027] This makes the rotation of the second shaft more stable.

[0028] Furthermore, the feeding pipe includes a first pipe section connected to the material box, a second pipe section connected to the first conveying pipe, and a conveying pipe section connecting the first pipe section and the second pipe section.

[0029] Furthermore, three trenching units are installed at the frame.

[0030] Furthermore, the three trenching units are the first trenching unit, the second trenching unit, and the third trenching unit, and the height difference between the first trenching unit and the second trenching unit is equal to the height difference between the second trenching unit and the third trenching unit.

[0031] This creates trenches of varying depths in the soil.

[0032] Furthermore, the height difference between the first trenching unit and the second trenching unit is 10-15 cm. Preferably, it is 10 cm.

[0033] Furthermore, the height difference between the second trenching unit and the third trenching unit is 10-15 cm. Preferably, it is 10 cm.

[0034] Furthermore, the trenching unit is fixedly connected to the first mounting plate.

[0035] Furthermore, the trenching unit includes a first connecting rod and a trencher connected to the first connecting rod.

[0036] Furthermore, a connecting frame is fixed at the frame, and three soil covering units are fixed on the connecting frame.

[0037] Furthermore, the connecting frame is fixedly connected to the first mounting plate.

[0038] Furthermore, the connecting frame includes a mounting rod portion and a connecting rod portion connecting the mounting rod portion and the first mounting plate.

[0039] Furthermore, the soil covering unit includes a second connecting rod and a soil covering plate fixed to the second connecting rod.

[0040] Furthermore, a bellows is fixed at the material box, and a blower is installed at the bellows; the second rotating shaft has a hollow structure with an air outlet channel, and the bellows is connected to three air outlet pipes, each of which is inserted into a second rotating shaft; the bottom end of the second rotating shaft has multiple first air outlet holes.

[0041] Furthermore, the fan has two.

[0042] Furthermore, the second conveying pipe has a movable sector plate and a fixed sector plate. A fixed guide post is fixed at the fixed sector plate, and a movable sleeve is fixed at the movable sector plate. A first spring connects the movable sleeve and the fixed sector plate. The fixed sector plate has two fixed end plates, and the movable sector plate has two movable end plates. A sector-shaped closing plate is fixed at the second rotating shaft.

[0043] Thus, the fan-shaped sealing plate can intermittently close and fix the gap of the fan-shaped plate, thereby enabling the second delivery pipe to perform intermittent fertilization.

[0044] Furthermore, the first spring is passed through a fixed guide post.

[0045] Furthermore, the number of first springs and fixed guide posts are equal and correspond one-to-one.

[0046] Furthermore, the fixed end plate has a discharge channel, the second rotating shaft has multiple second air outlets, and the fixed fan-shaped plate, the movable fan-shaped plate, the two fixed end plates and the two movable end plates surround and form a buffer space, and the second air outlets connect the buffer space and the air outlet channel.

[0047] Furthermore, the upper surfaces of both the fixed sector plate and the movable sector plate are inclined.

[0048] This helps the fertilizer fall more effectively.

[0049] Furthermore, a pressure sensor is installed at the end of the movable sleeve, a pressure plate is installed at the pressure sensor, and a second spring is connected between the pressure plate and the end of the fixed guide post.

[0050] Therefore, based on the detection results of the pressure sensor, it can be determined whether the fertilizer pipe is blocked.

[0051] Furthermore, the first air outlet is connected to the air outlet channel.

[0052] Furthermore, the fixed sector plate is fixedly connected to the second conveying pipe.

[0053] Furthermore, the movable sleeve is inserted by a fixed guide post.

[0054] Furthermore, the bottom end of the air outlet duct is open.

[0055] Furthermore, the movable sector plate is located below the second helical blade.

[0056] Furthermore, all the first air outlets are located below the fixed fan-shaped plate.

[0057] Furthermore, the fan-shaped sealing plate is semi-circular in shape.

[0058] Furthermore, the central angle of the sector-shaped closing plate is between 160 and 200 degrees.

[0059] Furthermore, the central angle of the fixed sector plate is between 250 and 290 degrees.

[0060] Furthermore, the central angle of the movable sector plate is between 250 and 290 degrees.

[0061] Furthermore, there is a gap between the fixed sector plate and the second rotating shaft.

[0062] Furthermore, there is a gap between the movable sector plate and the second conveying pipe, and a gap between the movable sector plate and the second rotating shaft.

[0063] This allows the movable sector plate to rise and fall smoothly.

[0064] Furthermore, the fixed guide post has three members that are evenly spaced in a ring, and the movable sleeve has three members that are evenly spaced in a ring.

[0065] Furthermore, one end of the first spring is connected to the fixed sector plate, and the other end is connected to the end of the movable sleeve.

[0066] Furthermore, the multiple first air outlets are distributed in multiple rings, with the first air outlets in each ring being distributed at equal intervals in a ring shape.

[0067] Furthermore, the number of the second air outlet is greater than or equal to three.

[0068] Furthermore, a support frame is fixed to the material box, and each air outlet pipe is fixedly connected to the support frame.

[0069] Furthermore, the support frame includes a first support plate fixed to the material box and three second support plates connected to the first support plate, with each air outlet pipe passing through one of the second support plates.

[0070] Furthermore, the second rotating shaft can rotate relative to the air outlet duct.

[0071] Beneficial effects:

[0072] 1. In the fertilization device of this application, the second delivery pipes of the three fertilization pipes are at different heights, thereby enabling stratified fertilization at different depths. Furthermore, the first rotating shafts of the three fertilization pipes are driven to rotate simultaneously by a drive motor, and the amount of fertilizer applied by the fertilization pipes can be adjusted by selecting transmission units with different transmission ratios.

[0073] 2. The fertilization device of this application can intermittently close and fix the gap of the fan-shaped plate through the fan-shaped sealing plate, thereby realizing intermittent fertilization, which can be better coordinated with intermittent sowing and avoid fertilizer waste.

[0074] 3. In the fertilizer application device of this application, the blockage of the fertilizer application pipe can be detected, and when the fertilizer application pipe is blocked, the bottom end of the second conveying pipe and the bottom end of the air outlet channel can be cleared by a blower, so that the fertilizer in the buffer space can be discharged from the discharge channel, thereby ensuring the normal operation of the entire device. Attached Figure Description

[0075] Figure 1 This is a schematic diagram of the fertilizer application device from the first angle.

[0076] Figure 2 This is a magnified view of region A;

[0077] Figure 3 This is a magnified view of region B.

[0078] Figure 4 This is a schematic diagram of the fertilizer application device from a second angle.

[0079] Figure 5 This is a magnified view of region C;

[0080] Figure 6 This is a magnified view of region D;

[0081] Figure 7 This is a magnified view of region E.

[0082] Figure 8 This is a magnified view of region E1;

[0083] Figure 9 This is a schematic diagram of the fertilization device from a third angle, showing a partial cross-section of the first fertilization pipe;

[0084] Figure 10 This is a magnified view of region F;

[0085] Figure 11 This is a magnified view of region G;

[0086] Figure 12 This is a magnified view of region G1;

[0087] Figure 13 This is a fourth-angle schematic diagram of the fertilization device. Part of the second delivery pipe of the first fertilization pipe is hidden to show the internal structure.

[0088] Figure 14 This is a magnified view of region H;

[0089] Figure 15 This is a magnified view of region I.

[0090] Explanation of reference numerals in the attached drawings: 1. Material box; 1.1. Vibrator; 2.1. First conveying pipe; 2.2. Connecting conveying pipe; 2.3. Second conveying pipe; 2.4. Radial rod; 2.5. Fixing ring; 3. First rotating shaft; 3.1. First conical tooth; 3.2. Second bearing; 3.3. Fourth bearing; 4. Second rotating shaft; 4.1. Second spiral blade; 4.2. Second conical tooth; 4.3. Fifth bearing; 4.4. Sixth bearing; 4.5. First air outlet; 4.6. Second air outlet; 5.1. First pipe section; 5.2. Conveying pipe section; 5.3. Second pipe section; 5.4. Valve; 6. Drive motor; 7. Transmission shaft; 7.1. First synchronous pulley; 7.2. Second synchronous pulley; 7.3. Third synchronous pulley; 7.4. Fourth synchronous pulley; 7.5. First synchronous belt; 7.6. Second synchronous belt; 8. Drive shaft; 1 shaft 8.1 Support plate; 9.1 Side plate; 9.2 First mounting plate; 9.3 Second mounting plate; 9.4 Third mounting plate; 9.5 Motor frame; 10 Trenching unit; 10.1 First connecting rod; 10.2 Trencher; 11 Connecting frame; 11.1 Mounting rod; 11.2 Connecting rod; 12 Covering unit; 12.1 Second connecting rod; 12.2 Covering plate; 13 Air box; 13.1 Fan; 13.2 Air outlet pipe; 14 Movable sector plate; 14.1 Movable sleeve; 14.2 Movable end plate; 15 Fixed sector plate; 15.1 Fixed guide post; 15.2 First spring; 15.3 Fixed end plate; 15.4 Discharge channel; 16 Sector-shaped closing plate; 17 Pressure sensor; 17.1 Second spring; 18.1 First support plate; 18.2 Second support plate. Detailed Implementation

[0091] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0092] This invention provides a high-efficiency quantitative stratified fertilization device for corn, as shown in the figure, including a frame, a drive motor 6, a transmission unit, a feed hopper 1, and three fertilization pipes. Each fertilization pipe includes a first conveying pipe 2.1, a connecting conveying pipe 2.2 connected to the first conveying pipe 2.1, and a second conveying pipe 2.3 connected to the connecting conveying pipe 2.2. A first rotating shaft 3 passing through the connecting conveying pipe 2.2 is installed inside the first conveying pipe 2.1, and a first spiral blade is installed at the first rotating shaft 3. A first conical tooth 3.1 is fixed at the end of the first rotating shaft 3. A second rotating shaft 4 passing through the connecting conveying pipe 2.2 is installed inside the second conveying pipe 2.3, and a second spiral blade 4.1 is installed at the second rotating shaft 4. A second conical tooth 4.2 cooperating with the first conical tooth 3.1 is fixed at the end of the second rotating shaft 4. A discharge pipe is connected between the first conveying pipe 2.1 of each fertilization pipe and the feed hopper 1, and a valve 5.4 is installed at the discharge pipe. The drive motor 6 drives the three first rotating shafts 3 to rotate through the transmission unit.

[0093] The frame includes two side plates 9.1, a first mounting plate 9.2 connecting the two side plates 9.1, a second mounting plate 9.3 connecting the two side plates 9.1, and a third mounting plate 9.4 connecting the two side plates 9.1. The first delivery pipes 2.1 of the three fertilizer pipes are all fixed to the first mounting plate 9.2. The first rotating shafts 3 of the three fertilizer pipes all pass through the second mounting plate 9.3. Three drive shafts 8 are mounted on the third mounting plate 9.4. The transmission unit includes three transmission shafts 7, one end of which is connected to the drive shaft 8, and the other end is connected to the first... The three drive shafts 7 are connected by a rotating shaft 3. The three drive shafts 7 are the first drive shaft, the second drive shaft, and the third drive shaft. The first drive shaft is equipped with a first synchronous pulley 7.1, the second drive shaft is equipped with a second synchronous pulley 7.2 and a third synchronous pulley 7.3, and the third drive shaft is equipped with a fourth synchronous pulley 7.4. A first synchronous belt 7.5 is installed between the first synchronous pulley 7.1 and the second synchronous pulley 7.2, and a second synchronous belt 7.6 is installed between the third synchronous pulley 7.3 and the fourth synchronous pulley 7.4. The drive motor 6 drives one of the drive shafts 8.

[0094] The frame also includes a motor frame 9.5 fixedly connected to the third mounting plate 9.4, and the drive motor 6 is mounted on the motor frame 9.5. A first bearing 8.1 is installed between the third mounting plate 9.4 and the drive shaft 8, a second bearing 3.2 is installed between the second mounting plate 9.3 and the first shaft 3, an end plate is fixed to one end of the first conveying pipe 2.1, a third bearing is installed between the end plate and the first shaft 3, a fourth bearing 3.3 is installed between the first shaft 3 and the connecting conveying pipe 2.2, and a fifth bearing 4.3 is installed between the second shaft 4 and the connecting conveying pipe 2.2. A fixing ring 2.5 is connected to the bottom end of the second conveying pipe 2.3 via a radial rod 2.4, and a sixth bearing 4.4 is installed between the fixing ring 2.5 and the second shaft 4. The feeding pipe includes a first pipe section 5.1 connected to the material box 1, a second pipe section 5.3 connected to the first conveying pipe 2.1, and a conveying pipe section 5.2 connecting the first pipe section 5.1 and the second pipe section 5.3. Three trenching units 10 are installed on the frame. A connecting frame 11 is fixed on the frame, and three covering units 12 are fixed on the connecting frame 11.

[0095] A blower box 13 is fixed at the material box 1, and a blower 13.1 is installed at the blower box 13. The second rotating shaft 4 has a hollow structure with an air outlet channel. The blower box 13 is connected to three air outlet pipes 13.2, and each air outlet pipe 13.2 is inserted into a second rotating shaft 4. The bottom end of the second rotating shaft 4 has multiple first air outlet holes 4.5 communicating with the air outlet channel. The second conveying pipe 2.3 has a movable sector plate 14 and a fixed sector plate 15 fixedly connected to the second conveying pipe 2.3. A fixed guide post 15.1 is fixed at the fixed sector plate 15. A movable sleeve 14.1 inserted by the fixed guide post 15.1 is fixed at the movable sector plate 14. A first spring 15.2 is connected between the movable sleeve 14.1 and the fixed sector plate 15. Two fixed springs are fixed at the fixed sector plate 15. A fixed end plate 15.3 is provided, and two movable end plates 14.2 are fixed to the movable sector plate 14. A sector-shaped closing plate 16 is fixed at the second rotating shaft 4. The fixed end plate 15.3 has a discharge channel 15.4, and the second rotating shaft 4 has multiple second air outlets 4.6. The fixed sector plate 15, movable sector plate 14, two fixed end plates 15.3, and two movable end plates 14.2 surround and form a buffer space. The second air outlets 4.6 connect the buffer space and the air outlet channel. The upper surfaces of the fixed sector plate 15 and the movable sector plate 14 are both inclined. A pressure sensor 17 is installed at the end of the movable sleeve 14.1. A pressure plate is installed at the pressure sensor 17. A second spring 17.1 is connected between the pressure plate and the end of the fixed guide post 15.1. The fixed guide posts 15.1 are three in a ring with equal spacing, and the movable sleeves 14.1 are three in a ring with equal spacing. One end of the first spring 15.2 is connected to the fixed sector plate 15, and the other end is connected to the end of the movable sleeve 14.1. Multiple first air outlets 4.5 are distributed in multiple rings, with each ring of first air outlets being equally spaced. The number of second air outlets 4.6 is greater than or equal to three. A support frame is also fixed at the material box 1, and each air outlet pipe 13.2 is fixedly connected to the support frame.

[0096] Working Principle: As shown in the figure, the fertilization device of this application has three trenching units, three fertilization pipes, and three covering units. Fertilizer from the hopper can be discharged through the discharge pipe. Driven by the drive motor and the transmission unit, the first shaft of the fertilization pipe can rotate, and the second shaft can rotate under the drive of the first shaft. Thus, the fertilizer in the hopper can be conveyed and applied by the action of the first and second helical blades. Furthermore, through the transmission unit, one drive motor can simultaneously drive the first shafts of the three fertilization pipes to rotate. By selecting transmission units with different transmission ratios, the rotational speed ratio of the first shafts of each fertilization pipe can be controlled, thereby adjusting the amount of fertilizer applied. The faster the rotational speed of the first shaft, the faster the fertilization speed of the corresponding fertilization pipe. Additionally, the second conveying pipes of the fertilization pipes have different heights, allowing for layered fertilization at different depths.

[0097] Furthermore, this application employs a spiral conveying pipe for fertilization. Under the conveying action of the first and second spiral blades, the fertilizer is transported one pitch distance with each rotation of the second rotating shaft. As shown in the figure, a fan-shaped sealing plate is fixed at the second rotating shaft. This sealing plate intermittently closes the notch, allowing the second conveying pipe to intermittently apply fertilizer. This better coordinates with the sowing device, as sowing is intermittent (a certain distance needs to be maintained between two seeds). Intermittent fertilization better aligns with intermittent sowing, ensuring a better match between fertilizer and seed positions and preventing fertilizer waste. Moreover, by controlling the rotation speed of the first rotating shaft, one rotation of the first shaft of the shallow fertilization pipe (the third fertilization pipe) corresponds to one sowing cycle by the sowing device. This ensures that the shallow fertilization cycle matches the sowing cycle, further aligning the shallow fertilization position with the seed position (at this stage, the seeds are small, and the root system is underdeveloped; shallow fertilization between two seeds would be difficult for the early-stage crop to absorb). At this time, because the first shafts of the middle-layer fertilization tube (second fertilization tube) and the deep-layer fertilization tube (first fertilization tube) rotate faster, the fertilization frequency of the middle-layer fertilization tube and the deep-layer fertilization tube is faster (some fertilizer will be located in the middle of the two seeds). However, because the crop's root system is more mature and has expanded outward at this time, it is sufficient to absorb the fertilizer in these locations. Therefore, the middle-layer and deep-layer fertilizer in the middle of the two seeds can also be absorbed by the developed root system, so there will be no waste of middle-layer and deep-layer fertilizer.

[0098] Furthermore, since the second conveying pipe provides intermittent fertilization, material cannot be discharged when the fan-shaped sealing plate closes the gap of the fixed fan-shaped plate. However, the second and first rotating shafts are still rotating, and theoretically, the material will still be conveyed for a distance of, for example, half a screw pitch. This means that the amount of fertilizer in the second conveying pipe increases. At this time, due to the design of the movable fan-shaped plate, the material can squeeze the movable fan-shaped plate, thus reducing the buffer space. However, because the material can press down on the movable fan-shaped plate, it can obtain a larger downward movement space. When the fan-shaped sealing plate does not block the gap of the fixed fan-shaped plate, the fertilizer can fall quickly (the upper surface of the movable fan-shaped plate is inclined to help the fertilizer fall better), thus the movable fan-shaped plate moves up, and the buffer space is restored. Therefore, the buffer space decreases and recovers periodically. Since the upward and downward movement of the movable fan-shaped plate is periodic, there is no blockage at the bottom of the second conveying pipe. Under normal system operation, the pressure sensor measurement value also changes periodically. When the pressure sensor measurement value is abnormal, the machine can be stopped to remind maintenance.

[0099] Furthermore, with use, the bottom of the air outlet channel of the second rotating shaft and the bottom of the second conveying pipe may become clogged, or even if not significantly clogged, weeds and soil may adhere to them. Also, due to the gaps between the movable fan-shaped plate and the second rotating shaft, and between the movable fan-shaped plate and the second conveying pipe, some fertilizer may fall into the buffer space. Therefore, during fertilization, the machine can be stopped periodically, and the fertilization device of this application can be raised to start the fan, causing air to flow from the air outlet channel. This cleans the bottom of the second conveying pipe and the bottom of the air outlet channel, and allows the fertilizer in the buffer space to exit through the discharge chute (air from the second air outlet forces the fertilizer in the buffer space to exit through the air outlet chute). Furthermore, fixing the upper surface of the fan-shaped plate to be inclined makes it easier for the fertilizer to be discharged from the buffer space.

[0100] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention without departing from the scope defined by the claims.

Claims

1. A high-efficiency quantitative stratified fertilization device for corn, characterized in that, The system includes a frame, a drive motor, a transmission unit, a material hopper, and three fertilizer application pipes. Each fertilizer application pipe includes a first conveying pipe, a connecting conveying pipe, and a second conveying pipe. A first rotating shaft is installed inside the first conveying pipe, and a first spiral blade is installed at the first rotating shaft. A first conical tooth is fixed to the end of the first rotating shaft. A second rotating shaft is installed inside the second conveying pipe, and a second spiral blade is installed at the second rotating shaft. A second conical tooth that mates with the first conical tooth is fixed to the end of the second rotating shaft. A discharge pipe connects the first conveying pipe of each fertilizer application pipe to the material hopper, and a valve is installed at the discharge pipe. The drive motor drives the first rotating shafts of the three fertilizer application pipes to rotate via the transmission unit. The frame includes two side plates, a first mounting plate connecting the two side plates, a second mounting plate connecting the two side plates, and a third mounting plate connecting the two side plates. The first delivery pipes of the three fertilizer pipes are all fixed to the first mounting plate. The first rotating shafts of the three fertilizer pipes all pass through the second mounting plate. Three drive rotating shafts are mounted on the third mounting plate. The transmission unit includes three transmission shafts, one end of which is connected to the drive shaft, and the other end is connected to the first shaft. The three transmission shafts are designated as the first transmission shaft, the second transmission shaft, and the third transmission shaft. A first synchronous pulley is mounted on the first transmission shaft, and a second synchronous pulley and a third synchronous pulley are mounted on the second transmission shaft. The first drive shaft has a fourth synchronous pulley mounted on a third drive shaft. A first synchronous belt is installed between the first and second synchronous pulleys, and a second synchronous belt is installed between the third and fourth synchronous pulleys. The drive motor drives one of the drive shafts. A wind box is fixed at the material box, and a fan is installed at the wind box. The second shaft has a hollow structure with an air outlet channel. The wind box is connected to three air outlet pipes, each of which is inserted into a second shaft. The bottom end of the second shaft has multiple first air outlet holes. The second conveying pipe contains a movable sector plate and a fixed sector plate. A fixed guide post is fixed at the fixed sector plate, and a movable sleeve is fixed at the movable sector plate. A first spring connects the fixed sector plates. The fixed sector plates are fixed with two fixed end plates, and the movable sector plates are fixed with two movable end plates. A sector-shaped closing plate is fixed at the second rotating shaft. The fixed end plates have discharge channels, and the second rotating shaft has multiple second air outlets. The fixed sector plates, movable sector plates, two fixed end plates, and two movable end plates surround and form a buffer space. The second air outlets connect the buffer space and the air outlet channel. The upper surfaces of both the fixed and movable sector plates are inclined. A pressure sensor is installed at the end of the movable sleeve, and a pressure plate is installed at the pressure sensor. A second spring connects the pressure plate and the end of the fixed guide post.

2. The high-efficiency quantitative corn stratified fertilization device according to claim 1, characterized in that, The frame also includes a motor frame fixedly connected to the third mounting plate, and the drive motor is mounted on the motor frame; the three fertilizer pipes are a first fertilizer pipe, a second fertilizer pipe and a third fertilizer pipe, and the height difference between the second delivery pipe of the first fertilizer pipe and the second delivery pipe of the second fertilizer pipe is equal to the height difference between the second delivery pipe of the second fertilizer pipe and the second delivery pipe of the third fertilizer pipe.

3. The high-efficiency quantitative corn stratified fertilization device according to claim 1, characterized in that, A first bearing is installed between the third mounting plate and the drive shaft, a second bearing is installed between the second mounting plate and the first shaft, an end plate is fixed to one end of the first conveying pipe, a third bearing is installed between the end plate and the first shaft, a fourth bearing is installed between the first shaft and the connecting conveying pipe, and a fifth bearing is installed between the second shaft and the connecting conveying pipe.

4. The high-efficiency quantitative corn stratified fertilization device according to claim 1, characterized in that, Both ends of the transmission shaft are fixed with end flanges, the end of the drive shaft is fixed with a first flange that is fixed to the end flange, and the end of the first shaft is fixed with a second flange that is fixed to the end flange.

5. The high-efficiency quantitative corn stratified fertilization device according to claim 1, characterized in that, The bottom end of the second conveying pipe is connected to a fixing ring via a radial rod, and a sixth bearing is installed between the fixing ring and the second rotating shaft; the feeding pipe includes a first pipe section connected to the material box, a second pipe section connected to the first conveying pipe, and a conveying pipe section connecting the first pipe section and the second pipe section.

6. The high-efficiency quantitative corn stratified fertilization device according to claim 1, characterized in that, Three trenching units are installed at the frame.

7. The high-efficiency quantitative corn stratified fertilization device according to claim 1, characterized in that, A connecting frame is fixed to the frame, and three soil covering units are fixed to the connecting frame.

8. The high-efficiency quantitative corn stratified fertilization device according to claim 1, characterized in that, The fixed guide post has three parts that are evenly spaced in a ring, and the movable sleeve has three parts that are evenly spaced in a ring. One end of the first spring is connected to the fixed sector plate, and the other end is connected to the end of the movable sleeve. Multiple first air outlets are distributed in multiple rings, and the first air outlets in each ring are evenly spaced in a ring. The number of second air outlets is greater than or equal to three.

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