Agricultural fertilizing device with screening function

Abstract

The invention relates to the technical field of fertilizing devices, in particular to an agricultural fertilizing device with a screening function. Comprising a moving frame, a storage tank is fixedly connected to the upper side of the moving frame, a screening frame is fixedly connected into the storage tank, the screening frame is rotationally connected with a rotating shell, a stirring frame is fixedly connected to the rotating shell, a discharging plate is hinged to the rotating shell, a first motor is fixedly connected into the screening frame, and an output shaft of the first motor is fixedly connected with a rotating frame; and the rotating frame is slidably connected with an arc-shaped plate, and the side, close to the discharging plate, in the rotating shell is slidably connected with extrusion rods distributed in the circumferential direction. Caked fertilizer is screened through the screening frame, then the caked fertilizer is slapped through rotation of the discharging plate, and an extrusion rod extrudes an arc-shaped plate to move, so that the extrusion force of the extrusion rod on the discharging plate is reduced, the extrusion force of the discharging plate on the caked fertilizer is reduced, and the situation that the extrusion force of the discharging plate on the caked fertilizer is too large is avoided; the caked fertilizer is excessively crushed.

Description

Technical Field

[0001] The present invention relates to the technical field of fertilizing devices, and in particular to a fertilizing device for agriculture with a screening function. Background Art

[0002] During the process of crop planting, since crops require a large amount of nutrients for growth, relying solely on the self-repair ability of the soil cannot keep the nutrients in the soil within the range required by the crops all the time. Therefore, it is necessary to apply fertilizer regularly so that the crops can utilize sufficient nutrients during the growth process, thereby ensuring that the crops have a good growth environment. Since fertilizers are prone to moisture absorption and caking during storage, directly spreading the caked fertilizers into the soil will result in uneven distribution of nutrients in the soil and the problem of burning seedlings of crops. To solve the above problems, during the fertilization process, workers will use existing devices to knock the caked fertilizers, and then apply the fertilizers after crushing the caked fertilizers. However, during the process of crushing the caked fertilizers, due to the inability to accurately control the force of knocking the fertilizers, it is easy to over-crush the fertilizers, resulting in too small particles of the crushed fertilizers. These fertilizers are prone to move along the gaps between other fertilizers and be discharged during the fertilization process, causing the smaller particles after crushing to be mixed with the normal particles, resulting in an increase in fertilizers here, leading to uneven fertilization of fertilizers and thus affecting the growth of crops. Summary of the Invention

[0003] The present invention provides a fertilizing device for agriculture with a screening function to solve the drawback that during the process of crushing caked fertilizers, due to the inability to accurately control the force of knocking the fertilizers, it is easy to over-crush the fertilizers, resulting in uneven fertilization of fertilizers.

[0004] The technical solution is as follows: A fertilizing device with a screening function for agricultural use, including a moving frame. A conveying frame is fixedly connected to the upper side of the moving frame. A mixing tank is fixedly connected to the middle of the moving frame. The mixing tank is provided with a feeding shell and a discharge port. The moving frame is provided with a rectangular hole communicating with the feeding shell. A storage tank is fixedly connected to the upper side of the moving frame. The storage tank is communicated with the mixing tank through a feeding pump. A screening frame is fixedly connected inside the storage tank. The screening frame is provided with uniformly distributed through holes. A rotating shell is rotatably connected to the upper side of the screening frame. A stirring frame is fixedly connected to the outer side of the rotating shell. Discharge plates that are circumferentially distributed and are provided with torsion springs between them are hinged to the upper part of the rotating shell. A first motor is fixedly connected inside the screening frame. The output shaft of the first motor is fixedly connected to a rotating frame. The rotating frame is rotatably connected to the screening frame. The rotating frame and the rotating shell are driven by a gear set. Symmetrically distributed chutes are arranged on the upper side of the rotating frame. An arc-shaped plate is slidably connected in the chute. A tension spring is arranged between the arc-shaped plate and the rotating frame. Circumferentially distributed pressing rods are slidably connected to one side of the rotating shell close to the circumferentially distributed discharge plates. A spring is arranged between the pressing rod and the rotating shell. Both the arc-shaped plate and the discharge plate are in pressing cooperation with the adjacent pressing rods. A reset assembly for driving the pressing rod to move is arranged on the rotating frame. A soil-turning mechanism for conveying materials to the mixing tank is arranged on the moving frame.

[0005] More preferably, both sides of the arc-shaped plate gradually move away from the axis of the rotating frame along its rotation direction.

[0006] More preferably, the reset assembly includes a reset frame. The reset frame is slidably connected inside the rotating frame. A spring is arranged between the reset frame and the rotating frame. Arc-shaped blocks that are symmetrically distributed are fixedly connected inside the rotating shell. A slope is arranged on one side of the arc-shaped block close to the reset frame. The slopes on the symmetrically distributed arc-shaped blocks are all in pressing cooperation with the reset frame. Symmetrically distributed reset blocks are fixedly connected to the side of the reset frame away from the arc-shaped block. A slope is arranged on one side of the reset block close to the adjacent arc-shaped plate. The slope on the reset block is in pressing cooperation with the adjacent arc-shaped plate. A limiting block is slidably connected inside the arc-shaped plate. A spring is arranged between the limiting block and the adjacent arc-shaped plate. A limiting groove is arranged in the chute of the rotating frame. The limiting block is in limiting cooperation with the adjacent limiting groove on the rotating frame.

[0007] More preferably, the soil-turning mechanism includes a feeding rack, the feeding rack is fixedly connected to the side of the moving rack away from the storage tank, and the feeding rack is fixedly connected to the conveying rack. A conveyor belt is arranged in the feeding rack. Symmetrically distributed automatic rotating shafts are arranged on the side of the feeding rack away from the moving rack. Connecting plates are fixedly connected to the back sides of the symmetrically distributed automatic rotating shafts. A second motor is fixedly connected to the side of any one of the connecting plates away from the moving rack. A rotating shaft is fixedly connected to the output shaft of the second motor. The rotating shaft is rotatably connected to the other connecting plate, and a soil-breaking wheel axially distributed is fixedly connected to the rotating shaft. The soil-breaking wheel is provided with trapezoidal grooves evenly distributed.

[0008] More preferably, it further includes a material shielding mechanism. The material shielding mechanism is arranged on the moving rack and is used for shielding the feeding shell of the mixing tank. The material shielding mechanism includes symmetrically distributed first elastic telescopic rods. The symmetrically distributed first elastic telescopic rods are fixedly connected to the side of the moving rack close to the feeding shell of the mixing tank. A baffle plate is fixedly connected to the telescopic end of the first elastic telescopic rod. The baffle plate is slidably connected to the moving rack, and the baffle plate is in sealing cooperation with the rectangular hole of the moving rack. Symmetrically distributed first telescopic rods are fixedly connected to the feeding rack. The fixed part of the first telescopic rod is communicated with the fixed part of the adjacent first elastic telescopic rod through a hose. A detection component is arranged on the feeding rack and is used for detecting the amount of the material. A material pushing component is arranged on the side of the conveying rack close to the feeding rack. A material blocking component is arranged on the side of the conveying rack away from the feeding rack. Both the material pushing component and the material blocking component are used for dispersing the material.

[0009] More preferably, the detection component includes a detection rack. The feeding rack is provided with symmetrically distributed through grooves. The detection rack is slidably connected in the symmetrically distributed through grooves on the feeding rack. The detection rack is attached to the upper side of the conveyor belt on the feeding rack. Symmetrically distributed adjusting rods are fixedly connected to the detection rack. The symmetrically distributed adjusting rods are all slidably connected to the feeding rack, and a spring is arranged between the detection rack and the feeding rack. An adjusting component is jointly arranged on the symmetrically distributed automatic rotating shafts and is used for pushing the telescopic end of the first telescopic rod to move.

[0010] More preferably, the cross section of the detection rack is an isosceles trapezoid, and the upper base of the isosceles trapezoid faces away from the feeding rack.

[0011] More preferably, the adjusting assembly includes symmetrically distributed second elastic telescopic rods, the second elastic telescopic rods are fixedly connected to adjacent automatic rotating shafts, sensors are arranged at the telescopic ends of the second elastic telescopic rods, the telescopic ends of the second elastic telescopic rods are in extrusion fit with the conveyor belt on the loading rack, the loading rack is provided with symmetrically distributed sliding grooves, sliding frames are slidably connected in the symmetrically distributed sliding grooves on the loading rack, springs are arranged between the sliding frames and the loading rack, an extrusion block is fixedly connected to one side of the sliding frame close to the adjacent adjusting rod, an inclined surface is arranged on one side of the extrusion block close to the adjacent adjusting rod, the inclined surface on the extrusion block is in extrusion fit with the adjacent adjusting rod, a regulating plate is rotatably connected to the other side of the sliding frame through an electric rotating shaft, the telescopic end of the first telescopic rod is fixedly connected with an L-shaped plate, and the L-shaped plate is in extrusion fit with the adjacent regulating plate.

[0012] More preferably, the pushing assembly includes symmetrically distributed second telescopic rods, the symmetrically distributed second telescopic rods are fixedly connected to one side of the conveying rack close to the loading rack, the fixed parts of the second telescopic rods are communicated with the fixed parts of the adjacent first telescopic rods through hoses, a first material blocking rack is fixedly connected to the telescopic ends of the symmetrically distributed second telescopic rods together, a first bidirectional lead screw is arranged on one side of the first material blocking rack close to the loading rack, a first driving motor is fixedly connected to the first material blocking rack, the output shaft of the first driving motor is fixedly connected to the first bidirectional lead screw, a first pushing plate is in threaded connection with the first bidirectional lead screw, and the first pushing plate is in contact fit with the first material blocking rack.

[0013] More preferably, the material blocking assembly includes symmetrically distributed electric push rods, the symmetrically distributed electric push rods are fixedly connected to one side of the conveying rack away from the loading rack, a second material blocking rack is fixedly connected to the telescopic ends of the symmetrically distributed electric push rods together, a second bidirectional lead screw is arranged on one side of the second material blocking rack close to the storage tank, a second driving motor is fixedly connected to the second material blocking rack, the output shaft of the second driving motor is fixedly connected to the second bidirectional lead screw, a second pushing plate is in threaded connection with the second bidirectional lead screw, and the second pushing plate is in contact fit with the second material blocking rack.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The present invention screens the caked fertilizer through the screening rack, and then rotates and beats the caked fertilizer through the discharge plate. When the discharge plate receives a large resistance, the extrusion rod is made to extrude the arc plate to move, so as to reduce the extrusion force of the extrusion rod on the discharge plate, and then reduce the extrusion force of the discharge plate on the caked fertilizer, avoiding excessive extrusion force of the discharge plate on the caked fertilizer, resulting in excessive fragmentation of the caked fertilizer and affecting the uniformity of fertilization.

[0015] 2. When the present invention conveys soil into the mixing tank, the amount of soil is detected by the detection frame, so as to adjust the shielding area of the baffle plate on the feeding shell of the mixing tank, making the volume of soil entering the mixing tank per unit time the same, thereby ensuring the uniformity of the fertilizer content in the unit soil.

[0016] 3. When the present invention applies fertilizer to different soils, the change in soil depth is detected by the second elastic telescopic rod, so as to adjust the proportion of the adjusting plate pushing the adjacent L-shaped plates to move, making the moving distance of the baffle plate adjusted synchronously with the soil depth, so as to realize the fertilization of the device for different soils. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 is a three-dimensional structural schematic diagram of the feeding frame, detection frame and soil crushing wheel of the present invention;

[0019] Figure 3 is a three-dimensional structural schematic diagram of the mixing tank, storage tank and baffle plate of the present invention;

[0020] Figure 4 is a three-dimensional structural schematic diagram of the rotating shell, stirring frame and discharging plate of the present invention;

[0021] Figure 5 is a three-dimensional structural schematic diagram of the first motor, rotating frame and arc plate of the present invention;

[0022] Figure 6 is a three-dimensional structural schematic diagram of the reset frame, arc block and reset block of the present invention;

[0023] Figure 7 is a three-dimensional structural schematic diagram of the rotating frame, arc plate and limiting block of the present invention;

[0024] Figure 8 is a three-dimensional structural schematic diagram of the feeding frame, automatic rotating shaft and connecting plate of the present invention;

[0025] Figure 9 is a three-dimensional structural schematic diagram of the feeding frame, first elastic telescopic rod and first telescopic rod of the present invention;

[0026] Figure 10 is a three-dimensional structural schematic diagram of the baffle plate, first telescopic rod and second telescopic rod of the present invention;

[0027] Figure 11 is a three-dimensional structural schematic diagram of the adjusting rod, extrusion block and adjusting plate of the present invention;

[0028] Figure 12 is a three-dimensional structural schematic diagram of the extrusion block, adjusting plate and L-shaped plate of the present invention;

[0029] Figure 13 Schematic three-dimensional structure diagram of the loading rack, adjusting rod and sliding rack of the present invention;

[0030] Figure 14 Schematic three-dimensional structure diagram of the electric push rod, second material retaining rack and second material pushing plate of the present invention.

[0031] The markings of each component in the attached drawings are as follows: 1 - moving rack, 2 - conveying rack, 3 - mixing tank, 4 - storage tank, 5 - screening rack, 6 - rotating shell, 7 - stirring rack, 8 - discharging plate, 9 - first motor, 10 - rotating rack, 11 - arc plate, 12 - extrusion rod, 21 - resetting rack, 22 - arc block, 23 - resetting block, 24 - limiting block, 31 - loading rack, 32 - automatic rotating shaft, 33 - connecting plate, 34 - second motor, 35 - soil crushing wheel, 41 - first elastic telescopic rod, 42 - material retaining plate, 43 - first telescopic rod, 51 - detection rack, 52 - adjusting rod, 61 - second elastic telescopic rod, 62 - sliding rack, 63 - extrusion block, 64 - adjusting plate, 65 - L-shaped plate, 71 - second telescopic rod, 72 - first material retaining rack, 73 - first material pushing plate, 81 - electric push rod, 82 - second material retaining rack, 83 - second material pushing plate. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0033] During the fertilization process, since fertilizers are prone to moisture absorption and caking during storage, directly spreading the caked fertilizers into the soil is likely to result in uneven distribution of fertilizers in various parts of the soil. Excessive fertilizers can easily cause the problem of burning seedlings during the growth of crops, while too little fertilizers will cause slow growth of crops. To solve the above problems, when adding materials, workers will use existing devices to knock the caked fertilizers, and then apply fertilizers after crushing the caked fertilizers. However, during the process of crushing caked fertilizers, due to the inability to accurately control the force of knocking the fertilizers, it is easy to over-crush the fertilizers, resulting in too small particles of the crushed fertilizers. At the same time, it is difficult to control the discharge of this part of the fertilizers by existing devices, making this part of the fertilizers prone to move along the gaps between other fertilizers and be discharged during the fertilization process, resulting in uneven fertilization of fertilizers and easily affecting the growth of crops.

[0034] Embodiment 1: A fertilizing device for agriculture with a screening function, as Figures 1-6As shown in the figure, it includes a moving frame 1. There are two symmetrically distributed conveyor belts on the upper side inside the moving frame 1. A driving device is arranged on the moving frame 1, and the driving device is used to drive the moving frame 1 to move. A conveying frame 2 is fixedly connected to the upper side of the moving frame 1, and the conveying frame 2 is used to prevent soil from falling. A mixing tank 3 is fixedly connected to the middle of the moving frame 1. There is a stirring mechanism inside the mixing tank 3, and the stirring mechanism is used to mix soil and fertilizer (the tank body is an existing stirring and mixing tank body). The mixing tank 3 is used to mix fertilizer and soil. A rectangular hole is arranged in the middle on the right side of the moving frame 1. A feeding shell is arranged in the middle on the right side of the mixing tank 3, and the feeding shell is located below the rectangular hole, and the rectangular hole of the moving frame 1 is communicated with the feeding shell of the mixing tank 3. A discharge port is arranged at the lower left part of the mixing tank 3, and a material spreading device (not elaborated for existing devices) is externally connected to the discharge port of the mixing tank 3. A storage tank 4 is fixedly connected to the upper side of the moving frame 1. The upper part of the storage tank 4 is flared, which is convenient for staff to add materials into it. The lower right part of the storage tank 4 is communicated with the mixing tank 3 through a feeding pump (the feeding pump is an existing device). The feeding pump extracts the fertilizer in the storage tank 4 and conveys it into the mixing tank 3. A screening frame 5 is fixedly connected to the middle inside the storage tank 4. The screening frame 5 is provided with uniformly distributed through holes, and the through holes are used to filter the caked fertilizer (hereinafter referred to as fertilizer lumps). A rotating shell 6 is rotatably connected to the upper side of the screening frame 5. A stirring frame 7 is fixedly connected to the outside of the rotating shell 6. The stirring frame 7 is composed of a circular ring and four round rods. The surface of the round rod is provided with uniformly distributed protrusions, which are used to push the fertilizer to move during rotation. Four discharge plates 8 distributed circumferentially and provided with torsion springs are hinged to the upper part of the rotating shell 6. A first motor 9 is fixedly connected inside the screening frame 5. The output shaft of the first motor 9 is fixedly connected with a rotating frame 10, and the rotating frame 10 is rotatably connected with the screening frame 5. The rotating frame 10 and the rotating shell 6 are driven by a gear set, which is used to make the rotating shell 6 and the rotating frame 10 rotate in opposite directions. Two symmetrically distributed chutes are arranged on the upper side of the rotating frame 10. An arc-shaped plate 11 is slidably connected in the chute of the rotating frame 10. A tension spring is arranged between the arc-shaped plate 11 and the rotating frame 10, and the tension spring is in a stretched state initially. Four extrusion rods 12 distributed circumferentially are slidably connected to the upper part of the rotating shell 6. A spring is arranged between the extrusion rod 12 and the rotating shell 6. The two sides of the arc-shaped plate 11 gradually move away from the axis of the rotating frame 10 along its rotation direction, and the included angle between the midpoints of the two sides of the arc-shaped plate 11 and the central axis of the rotating frame 10 is less than 80°, which is used to make the arc-shaped plate 11 have a time when it does not contact the extrusion rod 12. The arc-shaped plate 11 and the discharge plate 8 are both in extrusion fit with the adjacent extrusion rod 12, which is used to make the arc-shaped plate 11 gradually extrude the adjacent extrusion rod 12 outward, so that the extrusion rod 12 extrudes the adjacent discharge plate 8, thereby making the discharge plate 8 beat the fertilizer lumps, causing the fertilizer lumps to be crushed. A reset component is arranged on the rotating frame 10 to drive the extrusion rod 12 to move. A soil-turning mechanism is arranged on the moving frame 1 to convey soil into the mixing tank 3.

[0035] As Figures 5-7As shown in the figure, the reset component includes a reset frame 21, which is composed of a straight plate and a round rod. The reset frame 21 is slidably connected to the middle part inside the rotating frame 10. A spring is arranged between the reset frame 21 and the rotating frame 10. Two arc-shaped blocks 22 are symmetrically distributed at the center inside the rotating shell 6. An inclined surface is arranged on the upper side of the arc-shaped block 22. The inclined surfaces on the two arc-shaped blocks 22 are both in extrusion fit with the reset frame 21. The arc-shaped block 22 is used to push the reset frame 21 to move upward. Two reset blocks 23 are symmetrically distributed on the upper side of the reset frame 21. The cross-section of the reset block 23 is a right-angled reset block, and the inclined surface on the reset block 23 faces the side of the adjacent arc-shaped plate 11. The reset block 23 is in extrusion fit with the adjacent arc-shaped plate 11. When the reset block 23 moves upward, the reset block 23 pushes the adjacent arc-shaped plate 11 outward. A limiting block 24 is slidably connected to the lower part inside the arc-shaped plate 11. A spring is arranged between the limiting block 24 and the adjacent arc-shaped plate 11. A limiting groove is arranged in the chute of the rotating frame 10. The limiting block 24 is in limiting fit with the adjacent limiting groove on the rotating frame 10, which is used to limit the adjacent arc-shaped plate 11 initially, so that the arc-shaped plate 11 cannot move.

[0036] As Figure 2 and Figures 8-11 shown in the figure, the soil-turning mechanism includes a feeding frame 31, which is fixedly connected to the right side of the moving frame 1, and the feeding frame 31 is fixedly connected to the conveying frame 2. A conveyor belt is arranged inside the feeding frame 31. Two automatic rotating shafts 32 are symmetrically distributed front and back on the right side of the feeding frame 31. Connecting plates 33 are fixedly connected to the back sides of the two automatic rotating shafts 32. A second motor 34 is fixedly connected to the right side of the front connecting plate 33. The output shaft of the second motor 34 is fixedly connected to a rotating shaft, and this rotating shaft is rotatably connected to the other connecting plate 33. Five soil-breaking wheels 35 are axially distributed and fixedly connected to the rotating shaft. The automatic rotating shaft 32 is used to drive the adjacent connecting plate 33 to rotate, adjust the height of the soil-breaking wheel 35, and thus adjust the depth of soil breaking. Five trapezoidal grooves are evenly distributed on the outer side of the soil-breaking wheel 35, and the trapezoidal grooves are used to facilitate the soil-breaking wheel 35 to break the soil.

[0037] When the staff uses this device for fertilization, the staff first adds the fertilizer to be sown into the storage tank 4. During the downward movement of the fertilizer, the unclumped fertilizer enters the bottom of the storage tank 4 through the through holes on the screening frame 5, and the clumped fertilizer is blocked by the screening frame 5 and stays above it, thus preventing the fertilizer blocks from being directly discharged. During this process, the staff starts the first motor 9, and the output shaft of the first motor 9 drives the rotating frame 10 to rotate, and the rotating frame 10 drives the parts on it to rotate counterclockwise ( Figure 1Viewpoint (looking down from above), the rotating housing 6 drives the parts thereon to rotate in the opposite direction under the drive of the gear set, so that the stirring frame 7 rotates synchronously with the rotation of the rotating housing 6, so that the stirring frame 7 pushes the fertilizer blocks on the upper side of the screening frame 5 to move during the rotation process, avoiding the fertilizer blocks from piling up on the upper side of the screening frame 5, resulting in the through holes in this area of the screening frame 5 being blocked, causing the rate of fertilizer passing through the screening frame 5 to decrease and affecting the efficiency of fertilizer transportation.

[0038] During the rotation of the rotating frame 10, the rotating frame 10 drives the two arc-shaped plates 11 to rotate. As the arc-shaped plates 11 rotate, when the arc-shaped plates 11 contact the adjacent extrusion rods 12, at this time, the limiting block 24 limits the adjacent arc-shaped plates 11, and the extrusion force between the arc-shaped plates 11 and the adjacent extrusion rods 12 is small. The arc-shaped plates 11 extrude the adjacent extrusion rods 12 outward through the curved surfaces thereon (taking the left extrusion rod 12 as an example). The extrusion rod 12 moves to the left and compresses the adjacent spring. The extrusion rod 12 moves and extrudes the adjacent discharge plate 8, and the discharge plate 8 rotates counterclockwise and stores energy in the adjacent torsion spring. Figure 1 Viewpoint (looking from front to back), during the rotation of the discharge plate 8, the discharge plate 8 beats the fertilizer blocks to crush the fertilizer blocks into small pieces of fertilizer until the right end of the extrusion rod 12 separates from the curved surface outside the adjacent arc-shaped plate 11. Then, the extrusion rod 12 moves to the right and resets under the push of the adjacent spring and reduces the extrusion force on the adjacent discharge plate 8, so that the discharge plate 8 moves and resets under the drive of the adjacent torsion spring to end the beating of the fertilizer blocks. After adding a certain amount of fertilizer, the staff stops adding fertilizer to the storage tank 4 and closes the first motor 9 after there is no residual fertilizer on the screening frame 5 to complete the loading. During this process, as the rotating frame 10 drives the reset frame 21 to rotate, when the reset frame 21 contacts the inclined surface of the arc-shaped block 22, the arc-shaped block 22 pushes the reset frame 21 upward, so that the reset frame 21 drives the two reset blocks 23 to move and compress the adjacent spring until the reset frame 21 separates from the arc-shaped block 22. Then, the reset frame 21 moves and resets under the push of the adjacent spring. At this time, since the arc-shaped plate 11 is limited by the adjacent limiting block 24, the reset block 23 does not contact the adjacent arc-shaped plate 11.

[0039] After the above-mentioned fertilizer filling is completed, the staff starts the second motor 34. The output shaft of the second motor 34 drives the five soil-breaking wheels 35 to rotate through the rotating shaft thereon to crush the soil. Then, the two automatic rotating shafts 32 are started, so that the automatic rotating shafts 32 drive the soil-breaking wheels 35 to move downward through the adjacent connecting plates 33, and the soil-breaking wheels 35 gradually enter the soil. When the soil-breaking wheels 35 enter an appropriate depth in the soil (this depth is the depth of the crop root system), the staff closes the automatic rotating shafts 32 and starts the driving device (existing) of the moving frame 1, the feeding frame 31 and the conveyor belt of the moving frame 1. The moving frame 1 drives the soil-breaking wheels 35 to move to the right to break the soil. The conveyor belt on the feeding frame 31 conveys the broken soil into the moving frame 1, forming a groove at the position where the soil is taken out. After the soil enters the moving frame 1, part of the soil enters the mixing tank 3 through the rectangular holes of the moving frame 1. The remaining soil moves to the left under the drive of the conveyor belt in the moving frame 1 and is discharged from the left side of the conveying frame 2. After the soil enters the mixing tank 3, the staff starts the feed pump, so that the feed pump pumps a fixed amount of fertilizer in the storage tank 4 into the mixing tank 3. Then, the staff turns on the stirring mechanism (existing) of the mixing tank 3 to mix the fertilizer and soil in the mixing tank 3. After the mixing is completed, the mixture of fertilizer and soil (hereinafter referred to as the mixture) is discharged through the spreader on the mixing tank 3, so that the mixture is located at the bottom of the groove, facilitating the absorption of the crop root system. As the moving frame 1 drives the parts thereon to move to the right, the soil discharged from the left side of the conveying frame 2 buries the mixture, preventing rainwater or irrigation water from directly impacting the fertilizer, thus causing the movement of the fertilizer, and further resulting in uneven distribution of the fertilizer, affecting the normal growth of subsequent crops.

[0040] After the fertilization is completed, the staff turns off the electrical components turned on in the device and starts the automatic rotating shafts 32, so that the connecting plates 33 drive the soil-breaking wheels 35 to move back to their original positions. When the soil-breaking wheels 35 are separated from the ground, the staff closes the automatic rotating shafts 32, and then repeats the above process to fertilize other positions.

[0041] During the process of the discharging plate 8 hitting the fertilizer block, if the volume of the fertilizer block is relatively large, after part of the fertilizer is broken and accumulates below and cannot be discharged in time, resulting in a relatively large resistance on the discharging plate 8, the resistance for the extrusion rod 12 to push the adjacent discharging plate 8 to move gradually increases, and the resistance for the arc plate 11 to push the adjacent extrusion rod 12 to move gradually increases. As the rotating frame 10 continues to drive the arc plate 11 to rotate, when the extrusion force between the arc plate 11 and the adjacent extrusion rod 12 is greater than the resistance of the adjacent limiting block 24 to it, during the rotation of the arc plate 11, the extrusion rod 12 reversely pushes the arc plate 11 to move, so that the limiting block 24 on the arc plate 11 gradually moves upward and compresses the adjacent spring under the extrusion of the adjacent limiting groove on the rotating frame 10. When the limiting block 24 is separated from the adjacent limiting groove on the rotating frame 10, the limiting block 24 releases the limit on the adjacent arc plate 11, and the arc plate 11 moves towards the axis direction of the rotating frame 10 under the action of the tension spring, thereby quickly reducing the extrusion force on the adjacent extrusion rod 12. The extrusion rod 12 is reset under the push of the adjacent spring and reduces the extrusion force on the adjacent discharging plate 8, so that the discharging plate 8 rotates reversely to reset and reduces the extrusion force on the fertilizer block. Until the tension spring adjacent to the arc plate 11 is reset, at this time, the arc plate 11 moves above the adjacent reset block 23, and the arc plate 11 is separated from the adjacent extrusion rod 12, and the discharging plate 8 is completed to reset, avoiding excessive extrusion force of the discharging plate 8 on the fertilizer block, resulting in the crushed fertilizer block being subjected to a greater extrusion force and being broken into smaller blocks again, causing this part of the blocks to be discharged along the gaps between other fertilizers, affecting the uniformity of fertilization.

[0042] After the above-mentioned arc plate 11 stops moving, as the rotating frame 10 continues to drive the reset frame 21 to rotate, when the reset frame 21 contacts the arc block 22 again, the reset frame 21 drives the reset block 23 to move upward again. And when the reset block 23 contacts the adjacent arc plate 11, the reset block 23 pushes the adjacent arc plate 11 to move away from the axis direction of the rotating frame 10 and stretches the adjacent tension spring until the limiting block 24 is coaxial with the adjacent limiting groove on the rotating frame 10 again. The limiting block 24 protrudes again under the action of the adjacent spring to complete the limit, so that the arc plate 11 is completed to reset. At this time, the arc plate 11 is separated from the inclined plane on the reset block 23. When the reset frame 21 is separated from the arc block 22, the reset frame 21 drives the reset block 23 to move downward to reset again.

[0043] Example 2: On the basis of Example 1, as Figure 3 and Figures 9-13As shown in the figure, it further includes a material shielding mechanism. The material shielding mechanism is arranged on the moving frame 1 and is used to shield the feeding shell of the mixing tank 3. The material shielding mechanism includes two first elastic telescopic rods 41 symmetrically distributed front and back. The two first elastic telescopic rods 41 are respectively fixed to the front side and the back side of the rectangular hole of the moving frame 1. The telescopic end of the first elastic telescopic rod 41 is fixed with a baffle plate 42. The baffle plate 42 is slidably connected to the moving frame 1, and the baffle plate 42 is in sealing cooperation with the rectangular hole of the moving frame 1. The baffle plate 42 is used to control the flow area of the rectangular hole on the moving frame 1, so as to ensure the stability of the amount of soil entering the mixing tank 3 per unit time. The feeding frame 31 is fixed with two first telescopic rods 43 symmetrically distributed front and back. Taking the telescopic part of the first telescopic rod 43 as the reference, its fixed part is divided into two chambers on the left and right (as Figure 12 shown). The left chamber of the fixed part of the first telescopic rod 43 is communicated with the fixed part of the adjacent first elastic telescopic rod 41 through a hose. The fixed parts of the first telescopic rod 43 and the first elastic telescopic rod 41 are both filled with hydraulic oil. When the telescopic end of the first telescopic rod 43 is compressed, the first elastic telescopic rod 41 is synchronously extended by the same length. A detection component is arranged on the feeding frame 31, and the detection component is used to detect the amount of soil. A material pushing component is arranged on the right side of the conveying frame 2, and a material blocking component is arranged on the left side of the conveying frame 2. The material pushing component and the material blocking component are both used to disperse the soil.

[0044] As Figures 10-13 shown, the detection component includes a detection frame 51. The feeding frame 31 is provided with two through grooves symmetrically distributed front and back. The detection frame 51 is slidably connected in the two through grooves on the feeding frame 31. The detection frame 51 is attached to the upper side of the conveyor belt on the feeding frame 31. The detection frame 51 is used to detect the amount of soil conveyed by the feeding frame 31. The cross section of the detection frame 51 is an isosceles trapezoid, and the upper base of the isosceles trapezoid faces upward to reduce the obstruction to the soil conveyed by the conveyor belt. The detection frame 51 is fixed with two adjusting rods 52 symmetrically distributed front and back. The two adjusting rods 52 are both slidably connected to the feeding frame 31, and a spring is arranged between the detection frame 51 and the feeding frame 31. An adjusting component is jointly arranged on the two automatic rotating shafts 32, and the adjusting component is used to push the telescopic end of the first telescopic rod 43 to move.

[0045] As Figures 10-13As shown in the figure, the adjusting assembly includes two second elastic telescopic rods 61 symmetrically distributed before and after. The second elastic telescopic rods 61 are fixedly connected to the adjacent automatic rotating shafts 32. A sensor is provided at the telescopic end of the second elastic telescopic rod 61. The sensor is a pressure sensor, which is used to detect the extrusion force received by the telescopic end of the second elastic telescopic rod 61. The telescopic end of the second elastic telescopic rod 61 is in extrusion fit with the conveyor belt on the feeding rack 31. When the adjacent second elastic telescopic rod 61 is driven by the automatic rotating shaft 32 to rotate, the telescopic end of the second elastic telescopic rod 61 is extruded and compressed. The feeding rack 31 is provided with two chutes symmetrically distributed before and after. A sliding rack 62 is slidably connected in the chute of the feeding rack 31. A spring is provided between the sliding rack 62 and the adjacent chute of the feeding rack 31. A pressing block 63 is fixedly connected to the right side of the sliding rack 62. The pressing block 63 is provided with an inclined surface facing downward. The inclined surface is used to enable the adjusting rod 52 to press the adjacent pressing block 63 through the inclined surface when the adjusting rod 52 moves to the left, so as to move the adjacent sliding rack 62. The left side of the sliding rack 62 is rotatably connected to an adjusting plate 64 through an electric rotating shaft. The electric rotating shaft is electrically connected to the sensor on the second elastic telescopic rod 61. The telescopic end of the first telescopic rod 43 is fixedly connected with an L-shaped plate 65. The L-shaped plate 65 is in extrusion fit with the adjacent adjusting plate 64. Initially, there is an included angle between the adjusting plate 64 and the adjacent L-shaped plate 65. When the sliding rack 62 drives the adjacent adjusting plate 64 to move upward, two-directional forces are generated on the L-shaped plate 65 by the adjusting plate 64, so that the L-shaped plate 65 drives the telescopic end of the adjacent first telescopic rod 43 to retract.

[0046] As Figures 9-11 shown in the figure, the pusher assembly includes two second telescopic rods 71 symmetrically distributed before and after. Both of the two second telescopic rods 71 are fixedly connected to the right side of the conveying rack 2. The fixed part of the second telescopic rod 71 is filled with hydraulic oil. The fixed part of the second telescopic rod 71 is communicated with the right chamber of the fixed part of the adjacent first telescopic rod 43 through a hose. The telescopic ends of the two second telescopic rods 71 are jointly fixedly connected with a first material retaining rack 72, which is used to make the gap between the lower side of the first material retaining rack 72 and the moving rack 1 match the amount of soil detected by the detection rack 51, so that the soil can just pass through the gap between the lower side of the first material retaining rack 72 and the moving rack 1 after being leveled. A first bidirectional lead screw is provided on one side of the first material retaining rack 72 close to the feeding rack 31. A first driving motor is fixedly connected to the front part of the first material retaining rack 72. The output shaft of the first driving motor is fixedly connected with the first bidirectional lead screw. The first bidirectional lead screw is threadedly connected with a first pusher plate 73. The first pusher plate 73 is used to push the soil higher than the lower side of the first material retaining rack 72 to move back and forth, so that this part of the soil is evenly distributed when passing through the first material retaining rack 72, so as to ensure that the soil moves evenly to the vicinity of the rectangular hole of the moving rack 1, and make the thickness of the soil match the gap between the two material retaining plates 42, so that the amount of soil entering the mixing tank 3 is the same. The first pusher plate 73 is in contact fit with the first material retaining rack 72 to prevent the first pusher plate 73 from rotating.

[0047] As Figures 9-14 shown, the material blocking assembly includes two electric push rods 81 symmetrically distributed front and back. The electric push rods 81 are electrically connected to the sensors on the second elastic telescopic rod 61. Both electric push rods 81 are fixedly connected to the left side of the conveying frame 2. The telescopic ends of the two electric push rods 81 are jointly fixedly connected to a second material blocking frame 82. A second bidirectional lead screw is arranged on the right side of the second material blocking frame 82. A second drive motor is fixedly connected to the front part of the second material blocking frame 82. The output shaft of the second drive motor is fixedly connected to the second bidirectional lead screw. The second bidirectional lead screw is threadedly connected to a second material pushing plate 83, which is used to make the gap between the second material blocking frame 82 and the moving frame 1 match the depth of the soil-breaking wheel 35 entering the soil, so that the remaining soil accumulates on the right side of the second material blocking frame 82, and under the reciprocating movement of the second material pushing plate 83, the soil in this part is leveled, which is convenient for making the surface of the fertilized soil uniform. The function of the second material pushing plate 83 is similar to that of the first material pushing plate 73, ensuring that the soil is evenly distributed when passing through the second material blocking frame 82. The second material pushing plate 83 is in contact and cooperation with the second material blocking frame 82.

[0048] During the process of conveying soil to the moving frame 1, due to the uneven surface of the soil, the amount of soil conveyed into the moving frame 1 and then into the mixing tank 3 cannot be determined. As a result, after the soil is mixed with the fertilizer, the ratio of soil to fertilizer is different, making the distribution of fertilizer in the soil after fertilization uneven.

[0049] During the process of the conveyor belt of the above-mentioned feeding frame 31 conveying soil to the moving frame 1, when the soil passes through the detection frame 51 (for the convenience of description and understanding, the parts on the side of the feeding frame 31 are described in the direction after it rotates to the horizontal. For example, the moving direction of the detection frame 51 is the left-right direction, and the moving direction of the sliding frame 62 is the up-down direction), the soil pushes the detection frame 51 to move it to the left along the feeding frame 31. The detection frame 51 drives the two adjacent adjusting rods 52 to move to the left and compress the adjacent springs. The adjusting rods 52 move and squeeze the inclined surfaces on the adjacent extrusion blocks 63, so that the extrusion blocks 63 drive the adjacent sliding frames 62 to move upward and compress the adjacent springs. When the adjusting plate 64 contacts the adjacent L-shaped plate 65, due to the included angle between the adjusting plate 64 and the first telescopic rod 43, the adjusting plate 64 squeezes the adjacent L-shaped plate 65, so that the L-shaped plate 65 drives the telescopic end of the adjacent first telescopic rod 43 to retract. The hydraulic oil in the left chamber of the fixed part of the first telescopic rod 43 enters the fixed part of the adjacent first elastic telescopic rod 41, so that the telescopic end of the first elastic telescopic rod 41 extends and drives the adjacent baffle plate 42 to move, so that the baffle plate 42 gradually blocks the rectangular hole on the moving frame 1, resulting in a reduction in the communication area between the rectangular hole and the feed shell of the mixing tank 3, avoiding an increase in the thickness of the conveyed soil, resulting in an increase in the soil entering the mixing tank 3, and reducing the fertilizer content in the soil per unit volume after mixing, affecting the uniformity of fertilization.

[0050] During the process of compressing the telescopic end of the first telescopic rod 43, the right chamber in the fixed part of the first telescopic rod 43 extracts the hydraulic oil in the fixed part of the adjacent second telescopic rod 71, so that the telescopic end of the second telescopic rod 71 drives the first material baffle 72 and the parts thereon to move, thereby increasing the gap between the first material baffle 72 and the moving frame 1, and making the height of this gap change with the change of the total amount of soil passing through the detection frame 51. After transporting the soil into the moving frame 1, the staff starts the first driving motor on the first material baffle 72, so that the output shaft of the first driving motor drives the first double lead screw to rotate, and the first double lead screw drives the first pushing plate 73 to move back and forth in the front and back directions, thereby leveling this part of the soil, making the thickness of this part of the soil uniform, so that the thickness of the soil is consistent when passing through the first material baffle 72, avoiding uneven thickness of the soil when passing through the first material baffle 72, and causing changes in the soil entering the mixing tank 3, which affects the uniformity of the fertilizer content in the soil.

[0051] After the soil moves above the rectangular hole and enters the mixing tank 3, the soil is mixed with the fertilizer to form a mixture, and then the mixture is discharged. The remaining soil in the moving frame 1 continues to move to the left. When the soil approaches the second material baffle 82 and accumulates on its right side, the staff starts the second driving motor on the second material baffle 82, so that the output shaft of the second driving motor drives the second double lead screw to rotate, and the second double lead screw drives the second pushing plate 83 to move back and forth in the front and back directions, so that the second pushing plate 83 moves back and forth to repeat the similar function of the first pushing plate 73 to level the remaining soil, so that the remaining soil is evenly spread on the mixture when discharged, so that the soil surface is level after fertilization, which is convenient for subsequent work.

[0052] After the fertilization is completed, the staff turns off the opened electrical components. After the soil no longer passes through the detection frame 51, the adjusting rod 52 drives the detection frame 51 to move back to its original position under the action of the adjacent spring, and the sliding frame 62 returns to its original position under the action of the adjacent spring, so that the adjusting plate 64 no longer presses the adjacent L-shaped plate 65, and the telescopic end of the first telescopic rod 43 returns to its original position, thereby making the baffle plate 42 and the first material baffle 72 return to their original positions.

[0053] When it is necessary to adjust the depth of the soil broken by the soil crushing wheel 35 for fertilizing different soils, the staff starts the automatic rotating shaft 32, and the automatic rotating shaft 32 drives the adjacent connecting plate 33 and the second elastic telescopic rod 61 to move synchronously. As the automatic rotating shaft 32 rotates, the second elastic telescopic rod 61 gradually approaches the conveyor belt on the feeding frame 31, so that the telescopic end of the second elastic telescopic rod 61 is squeezed, and the pressure received by the sensor on the second elastic telescopic rod 61 increases. The sensor transmits a signal to the electric rotating shaft and the electric push rod 81 of the sliding frame 62, so that the electric rotating shaft drives the adjacent adjusting plate 64 to rotate clockwise ( Figure 1Viewpoint (looking from front to back), increase the distance between adjacent L-shaped plates 65 when the adjusting plate 64 moves, so as to realize that the detection frame 51 moves the same distance, increasing the distance that the telescopic end of the first telescopic rod 43 moves. The telescopic ends of the two electric push rods 81 drive the second material retaining frame 82 and the parts thereon to move upward synchronously, increasing the gap between the second material retaining frame 82 and the moving frame 1, increasing the thickness of the soil passing through the second material retaining frame 82. Until the soil crushing wheel 35 reaches an appropriate depth, the staff turns off the automatic rotating shaft 32, and both the second material retaining frame 82 and the adjusting plate 64 stop moving, enabling the device to fertilize different soils, thereby increasing the applicability of the device. After that, repeat the above process for fertilization.

[0054] After the fertilization is completed, start the automatic rotating shaft 32 to rotate the soil crushing wheel 35 and reset the second elastic telescopic rod 61. The extrusion force received by the sensor on the second elastic telescopic rod 61 decreases and transmits a signal to the automatic rotating shaft and the electric push rod 81 on the adjusting plate 64, so as to reset them.

[0055] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fertilizer application device with a screening function for agricultural use, comprising a mobile frame (1), a conveying frame (2) is fixedly connected to the upper side of the mobile frame (1), a mixing tank (3) is fixedly connected to the middle of the mobile frame (1), the mixing tank (3) is provided with a feed shell and a discharge port, the mobile frame (1) is provided with a rectangular hole connected to the feed shell, a storage tank (4) is fixedly connected to the upper side of the mobile frame (1), the storage tank (4) is connected to the mixing tank (3) through a feed pump, and is characterized in that: The invention also comprises a screening frame (5), wherein the screening frame (5) is fixedly connected to the storage tank (4), the screening frame (5) is provided with evenly distributed through holes, the upper side of the screening frame (5) is rotatably connected to a rotating shell (6), the outer side of the rotating shell (6) is fixedly connected to a stirring frame (7), the upper part of the rotating shell (6) is hinged with a circumferentially distributed discharge plate (8) and a torsion spring is arranged therebetween, the screening frame (5) is fixedly connected to a first motor (9), the output shaft of the first motor (9) is fixedly connected to a rotating frame (10), the rotating frame (10) is rotatably connected to the screening frame (5), the rotating frame (10) and the rotating shell (6) are driven by a gear set, and the rotating frame (10) is connected to the rotating shell (6). ) is provided with a centrally symmetrically distributed slide groove on the upper side, and an arc plate (11) is slidably connected in the slide groove, a tension spring is provided between the arc plate (11) and the rotating frame (10), a circumferentially distributed extrusion rod (12) is slidably connected to the side of the rotating shell (6) close to the circumferentially distributed discharge plate (8), a spring is provided between the extrusion rod (12) and the rotating shell (6), the arc plate (11) and the discharge plate (8) are both extruded and matched with the adjacent extrusion rod (12), a reset component for driving the extrusion rod (12) to move is provided on the rotating frame (10), and a soil turning mechanism for conveying materials to the mixing tank (3) is provided on the mobile frame (1).

2. The agricultural fertilizer application device with screening function according to claim 1, characterized in that: Both sides of the arc-shaped plate (11) gradually move away from the axis of the rotating frame (10) along the rotation direction thereof.

3. The agricultural fertilizer application device with screening function according to claim 2, characterized in that: The reset assembly comprises a reset frame (21), the reset frame (21) is slidably connected to the rotating frame (10), a spring is arranged between the reset frame (21) and the rotating frame (10), an arc block (22) which is centrally symmetrically distributed is fixedly connected to the rotating shell (6), an inclined surface is arranged on a side of the arc block (22) close to the reset frame (21), the inclined surfaces on the centrally symmetrically distributed arc block (22) are all pressed and matched with the reset frame (21), and the reset frame (21) is far away from the arc block (22). A symmetrically distributed reset block (23) is fixedly connected to one side, and a slope is provided on the side of the reset block (23) close to the adjacent arc plate (11). The slope on the reset block (23) is pressed and matched with the adjacent arc plate (11). A limit block (24) is slidably connected inside the arc plate (11), and a spring is provided between the limit block (24) and the adjacent arc plate (11). A limit groove is provided in the slide groove of the rotating frame (10), and the limit block (24) is limitedly matched with the adjacent limit groove on the rotating frame (10).

4. The agricultural fertilizer application device with screening function according to claim 1, characterized in that: The soil turning mechanism comprises a loading rack (31), the loading rack (31) being fixedly connected to a side of the mobile rack (1) away from the material storage tank (4), and the loading rack (31) being fixedly connected to the conveying rack (2), a conveying belt being arranged inside the loading rack (31), a side of the loading rack (31) away from the mobile rack (1) being provided with symmetrically distributed automatic rotating shafts (32), the back sides of the symmetrically distributed automatic rotating shafts (32) being fixedly connected with connecting plates (33), a side of any connecting plate (33) away from the mobile rack (1) being fixedly connected with a second motor (34), an output shaft of the second motor (34) being fixedly connected with a rotating shaft, the rotating shaft being rotatably connected with another connecting plate (33), and an axially distributed soil crushing wheel (35) being fixedly connected to the rotating shaft, the soil crushing wheel (35) being provided with evenly distributed trapezoidal grooves.

5. The agricultural fertilizer application device with screening function according to claim 4, characterized in that: The invention also comprises a material shielding mechanism, which is arranged on the movable frame (1) and is used to shield the feed shell of the mixing tank (3). The material shielding mechanism comprises symmetrically distributed first elastic telescopic rods (41), which are all fixedly connected to one side of the movable frame (1) close to the feed shell of the mixing tank (3), and the telescopic ends of the first elastic telescopic rods (41) are fixedly connected to a material shielding plate (42), which is slidably connected to the movable frame (1), and the material shielding plate (42) is slidably connected to the movable frame (1). 1), the loading rack (31) is fixedly connected with symmetrically distributed first telescopic rods (43), the fixing portion of the first telescopic rods (43) is connected with the fixing portion of the adjacent first elastic telescopic rods (41) through a hose, the loading rack (31) is provided with a detection component, the detection component is used to detect the amount of material, the side of the conveying rack (2) close to the loading rack (31) is provided with a pushing component, the side of the conveying rack (2) away from the loading rack (31) is provided with a blocking component, and the pushing component and the blocking component are both used to disperse the material.

6. The agricultural fertilizer application device with screening function according to claim 5, characterized in that: The detection assembly comprises a detection frame (51), the loading frame (31) is provided with symmetrically distributed through grooves, the detection frame (51) is slidably connected to the symmetrically distributed through grooves on the loading frame (31), the detection frame (51) is in contact with the upper side surface of the conveyor belt on the loading frame (31), the detection frame (51) is fixedly connected with symmetrically distributed adjustment rods (52), the symmetrically distributed adjustment rods (52) are all slidably connected to the loading frame (31), and a spring is provided between the detection frame (51) and the loading frame (31), and an adjustment assembly is commonly provided on the symmetrically distributed automatic rotating shafts (32), and the adjustment assembly is used to push the telescopic end of the first telescopic rod (43) to move.

7. The agricultural fertilizer application device with screening function according to claim 6, characterized in that: The cross section of the detection frame (51) is an isosceles trapezoid, and the upper base of the isosceles trapezoid faces a side away from the loading frame (31).

8. The agricultural fertilizer application device with screening function according to claim 6, characterized in that: The adjusting assembly comprises a symmetrically distributed second elastic telescopic rod (61), the second elastic telescopic rod (61) is fixedly connected to the adjacent automatic rotating shaft (32), the telescopic end of the second elastic telescopic rod (61) is provided with a sensor, the telescopic end of the second elastic telescopic rod (61) is extruded and matched with the conveyor belt on the loading rack (31), the loading rack (31) is provided with symmetrically distributed sliding grooves, the symmetrically distributed sliding grooves on the loading rack (31) are all slidably connected to the sliding rack (62), and the sliding rack (62) and the loading rack (31) are connected. A spring is arranged between the two ends of the sliding frame (62); a pressing block (63) is fixedly connected to one side of the sliding frame (62) close to the adjacent adjusting rod (52); a slope is arranged on one side of the pressing block (63) close to the adjacent adjusting rod (52); the slope on the pressing block (63) is pressed and matched with the adjacent adjusting rod (52); an adjusting plate (64) is rotatably connected to the other side of the sliding frame (62) via an electric rotating shaft; an L-shaped plate (65) is fixedly connected to the telescopic end of the first telescopic rod (43); the L-shaped plate (65) is pressed and matched with the adjacent adjusting plate (64).

9. The agricultural fertilizer application device with screening function according to claim 8, characterized in that: The pushing assembly includes symmetrically distributed second telescopic rods (71), which are fixedly connected to one side of the conveying frame (2) close to the loading frame (31), and the fixed part of the second telescopic rods (71) is connected to the fixed part of the adjacent first telescopic rod (43) through a hose, and the telescopic ends of the symmetrically distributed second telescopic rods (71) are commonly fixedly connected to a first material blocking frame (72), and a first bidirectional lead screw is arranged on one side of the first material blocking frame (72) close to the loading frame (31), and the first material blocking frame (72) is fixedly connected to a first transmission motor, and the output shaft of the first transmission motor is fixedly connected to the first bidirectional lead screw, and the first bidirectional lead screw is threadedly connected to a first pushing plate (73), and the first pushing plate (73) is in contact and cooperation with the first material blocking frame (72).

10. The agricultural fertilizer application device with screening function according to claim 9, characterized in that: The material blocking assembly includes symmetrically distributed electric push rods (81), which are all fixedly connected to a side of the conveying frame (2) away from the loading frame (31), and the telescopic ends of the symmetrically distributed electric push rods (81) are commonly fixedly connected to a second material blocking frame (82), and a second bidirectional lead screw is arranged on a side of the second material blocking frame (82) close to the material storage tank (4), and the second material blocking frame (82) is fixedly connected to a second transmission motor, and the output shaft of the second transmission motor is fixedly connected to the second bidirectional lead screw, and the second bidirectional lead screw is threadedly connected to a second push plate (83), and the second push plate (83) is in contact and fit with the second material blocking frame (82).

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