Granulated fertilizer application device with smooth discharge

Abstract

This invention discloses a granular fertilizer application device with smooth discharge, comprising a fertilizer box and a box cover adapted to the fertilizer box; the fertilizer box has a central shaft and a bushing sleeve fitted outside the central shaft, and several stirring rods are provided on the outside of both the central shaft and the bushing sleeve; the stirring rods are provided with several stirring blocks and scrapers for scraping the inner wall of the fertilizer box; the box cover is provided with a driving mechanism and a reversing mechanism, the driving mechanism drives the bushing sleeve and the central shaft to rotate in opposite directions through the reversing mechanism to stir the granular fertilizer. This invention, by setting a central shaft and bushing in the fertilizer box and placing stirring rods outside them, and by driving the bushing sleeve and the central shaft to rotate in opposite directions through the reversing mechanism, causes the upper and lower stirring rods to rotate in opposite directions to stir the granular fertilizer, thereby ensuring the stirring effect on the fertilizer; the stirring blocks on the stirring rods can effectively pierce fertilizer clumps that have hardened due to moisture absorption, and, in conjunction with the guide groove, can enhance the stirring effect on the fertilizer, preventing the fertilizer from arching or bridging in the fertilizer box and ensuring continuous and smooth discharge during fertilization.

Description

Technical Field

[0001] This invention relates to the field of granular fertilizer application technology, and in particular to a granular fertilizer application device with smooth discharge. Background Technology

[0002] As an important economic crop, the growth status and latex production of rubber trees are directly related to the economic benefits of growers. Scientific and reasonable fertilization is one of the key factors to ensure the healthy growth of rubber trees and increase yield.

[0003] The main methods of fertilizing rubber trees include trenching, hole application, broadcasting, and foliar spraying. In actual production and cultivation, the appropriate method should be selected flexibly based on the type of fertilizer and the age of the tree. For example, hole application and shallow trenching are often used for young trees, while ring trenching is suitable for mature trees. Foliar spraying is often used to supplement micronutrients. Currently, fertilization tools in rubber plantations include manual tools such as fertilizer shovels and backpack fertilizer spreaders, as well as equipment such as towed trenching and fertilizing machines and small tracked fertilizing machines. Fertilization equipment is usually equipped with large-capacity fertilizer tanks, which can hold sufficient fertilizer at one time and are suitable for large-scale fertilization operations.

[0004] In areas with high temperature and humidity, fertilizer in fertilizer bins is prone to absorbing moisture, clumping, arching, and bridging. Fertilizer powder also adheres to the fertilizer delivery pipes. This not only leads to intermittent feeding but may also cause blockages in the long run, making fertilization operations inconvenient. Summary of the Invention

[0005] In view of the above-mentioned prior art, the present invention provides a granular fertilizer application device with smooth discharge, and the main technical problem to be solved is how to ensure smooth fertilization.

[0006] To achieve the above objectives, the technical solution of this invention is implemented as follows: A pellet fertilizer application device with smooth discharge includes a fertilizer box and a box cover adapted to the fertilizer box. The fertilizer box is equipped with a central shaft and a bushing fitted outside the central shaft. Several stirring rods are provided on the outside of both the central shaft and the bushing. The stirring rod is equipped with several stirring blocks and a scraper for scraping the inner wall of the fertilizer tank; The box cover is equipped with a drive mechanism and a reversing mechanism. The drive mechanism drives the bushing and the central shaft to rotate in opposite directions through the reversing mechanism to agitate the granular fertilizer. The mixing block is equipped with a pointed tip for breaking up caking and several guide grooves for guiding fertilizer particles.

[0007] Furthermore, the bushing is rotatably connected to the outer top of the central shaft via a bearing, and the bushing is disposed through the middle of the box cover. Several stirring rods are fixedly connected at equal intervals to the outside of the bushing and the central shaft.

[0008] Furthermore, several screw grooves are evenly spaced on the pushing surface of the stirring rod, and a screw head that matches the screw grooves is fixedly connected to the tail end of the stirring block. The stirring block is cone-shaped, and several guide grooves are spirally distributed on the outside of the stirring block.

[0009] Furthermore, the top of the cover is fixedly connected to the housing outside the central shaft and bushing. The drive mechanism includes a motor fixedly connected in the housing. The bottom of the motor's output shaft is connected to a drive wheel via a key. Inside the housing, a rotating shaft is rotatably connected on the side away from the drive wheel.

[0010] Furthermore, the reversing mechanism includes gears connected by keys to the outside of the shaft and the bushing, and pulleys connected by keys to the outside of the shaft and the central shaft. The gear on the bushing meshes with the driving pulley, and the two gears mesh. The two pulleys are fitted with the same synchronous belt.

[0011] Furthermore, a fertilizer pipe is installed through the bottom of the fertilizer box, and the inner wall of the fertilizer pipe is provided with helical rifling. A base is provided below the fertilizer box, and several support rods are fixedly connected at equal intervals on the outer side between the base and the fertilizer box. A fertilizer discharge device is provided on the top of the base directly below the fertilizer pipe.

[0012] Furthermore, the bottom end of the fertilizer pipe is equidistantly connected with several triangular valve covers, and the outside of the fertilizer pipe is fixedly connected with an annular chamber. Inside the annular chamber, there is a push plate, and several valve covers are rotatably connected to the push plate with connecting rods.

[0013] Furthermore, a hydraulic chamber is fixedly connected to one side of the bottom of the fertilizer tank, a push rod is fixedly connected in the hydraulic chamber, a piston is fixedly connected to one end of the piston rod of the push rod, and a pipe is installed between the hydraulic chamber and the annular chamber.

[0014] Furthermore, a base is detachably fixed to the top center of the base, and the fertilizer applicator is fixedly connected to the top of the base.

[0015] The beneficial effects of this invention are as follows: 1. This invention sets a central shaft and a bushing in the fertilizer tank, and sets stirring rods on the outside of the two. The driving mechanism drives the bushing and the central shaft to rotate in opposite directions through a reversing mechanism, so that the upper and lower stirring rods rotate in opposite directions to stir the granular fertilizer, thereby ensuring the stirring effect of the fertilizer. The stirring rod is equipped with a stirring block with a pointed tip, which can effectively pierce the fertilizer clumps that have hardened due to moisture absorption. At the same time, the guide groove can also provide additional pushing and guiding effect for the fertilizer granules, thereby improving the stirring effect of the fertilizer, preventing the fertilizer from arching and bridging in the fertilizer tank, and ensuring continuous and smooth discharge during fertilization. 2. The present invention has several triangular valve covers that can be combined into a cone structure at the bottom of the fertilizer pipe. The piston is driven by the push rod to move in the hydraulic chamber, which can drive the valve covers to deflect synchronously, so as to realize the flexible adjustment of the opening and closing degree of the discharge port. Therefore, the discharge speed can be precisely controlled, and the opening degree of the valve cover can be adjusted according to the actual fertilization needs. It can not only meet the requirements of different fertilizer amounts, but also adapt to the use of granular fertilizers of different particle sizes, thus improving the flexibility and reliability of fertilization operations. 3. The present invention has a base that is detachably fixed to the top of the base, and the fertilizer applicator is set on the base. Therefore, the fertilizer applicator can be easily replaced according to the physical characteristics of different types of granular fertilizers. Thus, the device can be used for multiple purposes without modifying the whole device. This modular design can reduce the cost of equipment use and improve the adaptability of the fertilizer applicator to different fertilizer varieties and different fertilization scenarios. Attached Figure Description

[0016] Figure 1 This is a perspective view of a granular fertilizer application device with smooth discharge according to Embodiment 1 of this application; Figure 2 This is a cross-sectional view of a pellet fertilizer application device with smooth discharge according to Embodiment 1 of this application; Figure 3 This is a perspective view of the mixing block of a granular fertilizer application device with smooth discharge according to Embodiment 1 of this application; Figure 4 This is a perspective view of the annular compartment of a granular fertilizer application device with smooth discharge according to Embodiment 1 of this application; Figure 5 This is a perspective view of a granular fertilizer application device with smooth discharge according to Embodiment 2 of this application; Figure 6 This is a schematic diagram of the integrated trenching, fertilizing, and soil covering equipment in Embodiment 3 of this application.

[0017] Explanation of icon numbers: 1. Fertilizer box; 2. Box cover; 3. Machine housing; 301. Motor; 4. Base; 5. Support rod; 6. Fertilizer discharge device; 7. Drive wheel; 8. Gear; 9. Synchronous belt; 10. Rotating shaft; 11. Pulley; 12. Bushing; 13. Stirring rod; 14. Stirring block; 1401. Screw head; 1402. Guide groove; 1403. Pointed head; 15. Scraper; 16. Central shaft; 17. Fertilizer pipe; 18. Ring chamber; 19. Connecting rod; 20. Valve cover; 21. Piston; 22. Push rod; 23. Hydraulic chamber; 24. Push plate; 25. Pipe; 26. Base. Detailed Implementation

[0018] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0019] Example 1 See attached document Figure 1-4 This application provides a granular fertilizer application device with smooth discharge, including a fertilizer box 1 and a box cover 2 adapted to the fertilizer box 1. The fertilizer box 1 is used to hold the granular fertilizer to be applied, and the box cover 2 covers the top opening of the fertilizer box 1 to seal and prevent dust.

[0020] Preferably, the fertilizer box 1 is provided with a central shaft 16 and a bushing 12 sleeved outside the central shaft 16. The bushing 12 is rotatably connected to the top of the central shaft 16 through a bearing, so that the bushing 12 can rotate freely relative to the central shaft 16. A rotating sealing ring is provided at the bottom of the bushing 12 to seal the rotation with the central shaft 16, so as to prevent granular fertilizer from entering the gap between the two and affecting the smooth operation. The bushing 12 is disposed in the middle of the box cover 2. The central shaft 16 and the bushing 12 are both on the axis of the fertilizer box 1 and extend in the vertical direction. Several stirring rods 13 are provided on the outside of the central shaft 16 and the bushing 12. The stirring rods 13 are fixedly connected at equal intervals to the outside of the bushing 12 and the central shaft 16, and are arranged in a radial or spiral layer along the axial direction.

[0021] Preferably, the stirring rod 13 is provided with a plurality of stirring blocks 14 and scrapers 15 for scraping the inner wall of the fertilizer tank 1. Different scrapers 15 are provided on the stirring rod 13 located on the bushing 12 and the central shaft 16 respectively. For example, the scraper 15 that moves with the bushing 12 can be long and strip-shaped to fit the upper inner wall of the fertilizer tank 1, while the scraper 15 that moves with the central shaft 16 can be "U"-shaped to fit the lower inner wall and the bottom inner wall of the fertilizer tank 1.

[0022] Preferably, the pushing surface of the stirring rod 13 is provided with several equally spaced screw grooves, and the tail end of the stirring block 14 is fixedly connected with a screw head 1401 that matches the screw grooves. The stirring block 14 is threadedly connected to the screw grooves on the stirring rod 13 through the screw head 1401, thereby realizing the detachable fixing of the stirring block 14 on the stirring rod 13, thereby realizing modular replacement and controlling the number of installations. The stirring block 14 is conical in shape, and the stirring block 14 is provided with a pointed tip 1403 for breaking up caking and several guide grooves 1402 for guiding fertilizer particles. The pointed tip 1403 can facilitate the... During rotation, the puncture of the hardened fertilizer clumps is broken. The guide grooves 1402 are spirally distributed on the outside of the stirring block 14. When the stirring block 14 rotates with the stirring rod 13, the spiral guide grooves 1402 can provide guidance and pushing for the fertilizer particles, so as to bring about a further stirring effect, promote the flow of fertilizer, avoid hardening and bridging. At the same time, in conjunction with the scraper 15 whose outer edge contacts the inner wall of the fertilizer box 1, the scraper 15 slides along the inner wall of the fertilizer box 1 when the stirring rod 13 rotates, scraping off the fertilizer powder adhering to the inner wall and preventing the fertilizer from accumulating on the inner wall.

[0023] Preferably, the top of the cover 2 is fixedly connected to the housing 3 outside the central shaft 16 and the bushing 12. The cover 2 is provided with a drive mechanism and a reversing mechanism. The housing 3 is used to accommodate and protect the drive mechanism and the reversing mechanism. The drive mechanism drives the bushing 12 and the central shaft 16 to rotate in opposite directions through the reversing mechanism to agitate the granular fertilizer. The drive mechanism includes a motor 301 fixedly connected in the housing 3. The bottom end of the output shaft of the motor 301 is connected to a drive wheel 7 by a key. Inside the housing 3, a rotating shaft 10 is rotatably connected on the side away from the drive wheel 7. The reversing mechanism includes a gear 8 connected by a key to the outside of the rotating shaft 10 and the bushing 12, and a pulley 11 connected by a key to the outside of the rotating shaft 10 and the central shaft 16. The gear 8 on the bushing 12 meshes with the drive wheel 7. The two gears 8 mesh with each other. The two pulleys 11 are fitted with the same synchronous belt 9.

[0024] Preferably, after the motor 301 starts, its output shaft drives the drive wheel 7 to rotate, and the drive wheel 7 drives the gear 8 on the bushing 12 that meshes with it to rotate, thereby causing the bushing 12 and the stirring rod 13 outside it to rotate in the first direction. At the same time, the gear 8 on the bushing 12 drives another gear 8 that meshes with it to rotate. This gear 8 is connected to the rotating shaft 10 by a key, driving the rotating shaft 10 to rotate. The pulley 11 on the rotating shaft 10 drives the pulley 11 on the central shaft 16 to rotate through the synchronous belt 9, thereby causing the central shaft 16 and the stirring rod 13 outside it to rotate in the opposite direction to the bushing 12. This realizes the opposite rotation of the bushing 12 and the central shaft 16, that is, the inner and outer stirring rods 13 rotate in opposite directions, and the granular fertilizer in the fertilizer box 1 is stirred in both directions to enhance the effect of breaking up caking and preventing bridging.

[0025] Preferably, a fertilizer pipe 17 is provided through the bottom of the fertilizer tank 1, and the fertilizer pipe 17 is connected to the interior of the fertilizer tank 1. A valve is provided at the top of the fertilizer pipe 17 to restrict the fertilizer from being inside the fertilizer tank 1 and from accumulating inside the fertilizer pipe 17. When fertilizing, the valve only needs to be opened before the valve cover 20 to ensure smooth fertilization. The fertilizer particles that are dispersed in the fertilizer tank 1 are discharged through the fertilizer pipe 17 under the action of gravity. The inner wall of the fertilizer pipe 17 is provided with a spiral rifling. The spiral rifling can guide the fertilizer particles to move downward along the spiral path and continuously impact the inner wall of the fertilizer pipe 17 to reduce the adhesion of fertilizer to the inner wall of the fertilizer pipe 17, further ensuring smooth discharge.

[0026] Preferably, a base 4 is provided below the fertilizer tank 1, and several support rods 5 are fixedly connected at equal intervals on the outer side between the base 4 and the fertilizer tank 1. The support rods 5 support the fertilizer tank 1 above the base 4, providing installation space for the fertilizer pipe 17 and the fertilizer discharger 6. The fertilizer discharger 6 is provided on the top of the base 4 directly below the fertilizer pipe 17. The fertilizer particles discharged from the fertilizer pipe 17 fall into the fertilizer discharger 6 and are discharged outward by the fertilizer discharger 6 according to the preset fertilizer amount.

[0027] Preferably, a number of triangular valve covers 20 are rotatably connected at equal intervals to the bottom end of the fat pipe 17. The valve covers 20 can rotate around their hinge points to form a cone structure to close the fat pipe 17. Therefore, the fat pipe 17 can be opened or closed by adjusting the rotation of the valve covers 20. An annular chamber 18 is fixedly connected to the outside of the fat pipe 17. The annular chamber 18 is arranged around the outside of the fat pipe 17. A push plate 24 is provided inside the annular chamber 18. The push plate 24 can move vertically inside the annular chamber 18. Guide ribs can be provided on the inner wall of the annular chamber 18 so that the push plate 24 can be raised and lowered vertically in a horizontal state to avoid deviation or tilting that would cause poor hydraulic transmission. A connecting rod 19 is rotatably connected between the valve covers 20 and the push plate 24. One end of the connecting rod 19 is hinged to the top or side of the valve cover 20, and the other end is hinged to the push plate 24 so that the raising and lowering movement of the push plate 24 can drive the valve cover 20 to deflect through the connecting rod 19.

[0028] Preferably, a hydraulic chamber 23 is fixedly connected to one side of the bottom of the fertilizer tank 1. A push rod 22 is fixedly connected to the hydraulic chamber 23. A piston 21 is fixedly connected to one end of the piston rod of the push rod 22. The piston 21 is located inside the hydraulic chamber 23 and is adapted to it. Several air holes are opened on the side of the hydraulic chamber 23 away from the piston 21 so that the air pressure balance inside the hydraulic chamber 23 can be maintained when the piston 21 moves. A pipe 25 is provided through the hydraulic chamber 23 and the annular chamber 18, and the pipe 25 connects the interior of the hydraulic chamber 23 and the annular chamber 18. When push rod 22 pushes piston 21 to move within hydraulic chamber 23, the liquid medium in hydraulic chamber 23 enters annular chamber 18 through pipe 25 or flows back from annular chamber 18 to hydraulic chamber 23, thereby driving push plate 24 to move within annular chamber 18. When push plate 24 moves, it drives each valve cover 20 to rotate synchronously through connecting rod 19, thereby opening or closing the valve cover 20. By controlling the extension of push rod 22, the opening angle of valve cover 20 can be precisely adjusted, thereby controlling the discharge speed of fat pipe 17.

[0029] Working principle: When in use, the operator first puts the granular fertilizer into the fertilizer box 1 and closes the box cover 2. During fertilizer storage or when fertilization is needed, the power can be turned on to the motor 301 and it can be started. The motor 301 drives the gear 8 on the bushing 12 to rotate through the drive wheel 7. The gear 8 drives the rotating shaft 10 to rotate through another gear 8. The rotating shaft 10 drives the central shaft 16 to rotate through the pulley 11 and the synchronous belt 9, so as to drive the bushing 12 and the central shaft 16 to rotate in opposite directions. The stirring rods 13 located outside the bushing 12 and the central shaft 16 rotate in opposite directions, so the two layers of stirring rods 13 can stir the granular fertilizer in the fertilizer tank 1 in both directions. During this process, the stirring blocks 14 on the stirring rods 13 rotate accordingly. The tips 1403 of the stirring blocks 14 can pierce and break the hardened fertilizer clumps. The spirally distributed guide grooves 1402 can guide and push the broken fertilizer granules. The scraper 15 scrapes off the fertilizer powder adhering to the inner wall of the fertilizer tank 1 to ensure the dispersion effect of the granular fertilizer and avoid hardening and bridging. When fertilizer needs to be discharged, the valve can be opened to allow the crushed and dispersed fertilizer particles to enter the fertilizer pipe 17 under gravity. According to the fertilization needs, the piston 21 can be pushed to move in the hydraulic chamber 23 by controlling the push rod 22. The hydraulic medium enters the ring chamber 18 through the pipeline 25 and pushes the push plate 24 to move. The push plate 24 drives each valve cover 20 to deflect synchronously through the connecting rod 19 to adjust the opening size of the valve cover 20, thereby controlling the speed at which the fertilizer falls from the fertilizer pipe 17 into the fertilizer discharger 6. After that, the fertilizer discharger 6 discharges the fertilizer outward according to the preset amount, thus completing the fertilization operation. During the process of fertilizer falling in fertilizer tube 17, the spiral rifling on the inner wall of fertilizer tube 17 can guide the granules to move downward along the spiral path. In this case, the granular fertilizer will also hit fertilizer tube 17 when falling to cause slight vibration, so as to reduce the adhesion of fertilizer and fertilizer powder, and ensure the smoothness and integrity of fertilizer discharge.

[0030] Example 2 See attached document Figure 5 This application provides a granular fertilizer application device with smooth discharge. Compared with embodiment 1, in order to facilitate the replacement of the fertilizer discharger 6 to adapt to different specifications of granular fertilizer, a base 26 is detachably fixedly connected to the top center of the base 4. The fertilizer discharger 6 is fixedly connected to the top of the base 26. The base 26 and the base 4 can be detachably fixed by means of bolt connection, snap connection or plug-in connection. When it is necessary to replace different types of fertilizer dischargers 6, the operator only needs to remove the base 26 from the base 4, replace it with a new base 26 with the target fertilizer discharger 6 installed and fix it again. Different types of fertilizer dischargers 6 can be selected according to parameters such as the particle size, flowability and application rate requirements of granular fertilizer. For example, a grooved wheel fertilizer discharger is selected for large-diameter granular fertilizer, and a spiral fertilizer discharger is selected for small-diameter or powdery fertilizer.

[0031] Working principle: When different types of granular fertilizers need to be applied, the operator can remove the base 26 from the base 4 and replace it with a new base 26 equipped with a fertilizer applicator 6, so that the same set of equipment can adapt to the application needs of different fertilizer varieties, thereby improving the versatility and economy of the equipment.

[0032] Example 3 See attached document Figure 6 This application provides an integrated trenching, fertilizing and soil covering device that uses the above-mentioned fertilizing device. The base 4 is a flatbed cart or a tractor. The fertilizer box 1 and the fertilizer discharger 6 are both set on the vehicle body. The front end of the vehicle body is provided with a slotted wheel, the rear end is provided with a soil covering scraper, the bottom end is provided with a walking wheel, and the interior is provided with a traction motor or engine. In addition, the vehicle body is equipped with mechanical walls for raising or lowering the grooving wheel, so that the vehicle body can move smoothly after the grooving wheel is raised, and fertilizer trenches can be opened after the grooving wheel is lowered; a soil retaining plate is installed on the outside of the grooving wheel so that the soil dug out by the grooving wheel will not splash upward or outward, but will be thrown backward. The vehicle body has a fertilizer channel opened directly below the fertilizer outlet of the fertilizer dispenser 6. The diameter of the fertilizer channel is larger than the diameter of the fertilizer outlet of the fertilizer dispenser 6, so as to ensure that the fertilizer discharge path is not blocked without extending the fertilizer outlet. The fertilizer dispenser 6 is located between the grooving wheel and the soil covering scraper. Therefore, as the vehicle body moves, the grooving wheel can dig fertilizer trenches, the fertilizer dispenser 6 can apply fertilizer into the trenches, and the soil covering scraper can cover the soil back. The soil covering scraper is rotatably connected to the vehicle body, and a torsion spring is installed at the rotatable connection between the two so as to use the elastic force of the torsion spring to keep the soil covering scraper in a downward state. Therefore, as the vehicle body moves, the soil covering scraper can push the soil thrown backward by the grooving wheel so as to cover the fertilizer with soil. The traction motor or engine installed inside the vehicle body can provide power for the vehicle body to move, so that the device can move on its own; in addition, the device can also be pushed or pulled by an external traction device by installing a towing hook on the vehicle body.

[0033] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A pellet fertilizer application device with smooth discharge, comprising a fertilizer tank (1) and a tank cover (2) adapted to the fertilizer tank (1), characterized in that: The fertilizer box (1) is provided with a central shaft (16) and a bushing (12) sleeved outside the central shaft (16). Both the central shaft (16) and the bushing (12) are provided with a number of stirring rods (13). The stirring rod (13) is provided with several stirring blocks (14) and a scraper (15) for scraping the inner wall of the fertilizer box (1). The box cover (2) is provided with a drive mechanism and a reversing mechanism. The drive mechanism drives the bushing (12) and the central shaft (16) to rotate in opposite directions through the reversing mechanism to agitate the granular fertilizer. The stirring block (14) is provided with a pointed tip (1403) for breaking up caking and several guide grooves (1402) for guiding fertilizer particles.

2. The granular fertilizer application device with smooth discharge according to claim 1, characterized in that, The bushing (12) is rotatably connected to the outer top of the central shaft (16) via a bearing. The bushing (12) is disposed through the middle of the box cover (2). Several stirring rods (13) are fixedly connected at equal intervals to the outside of the bushing (12) and the central shaft (16).

3. The granular fertilizer application device with smooth discharge according to claim 2, characterized in that, The stirring rod (13) has several screw grooves evenly spaced on its pushing surface. The tail end of the stirring block (14) is fixedly connected with a screw head (1401) that matches the screw grooves. The stirring block (14) is cone-shaped, and several guide grooves (1402) are spirally distributed on the outside of the stirring block (14).

4. The granular fertilizer application device with smooth discharge according to claim 2, characterized in that, The top of the cover (2) is fixedly connected to the housing (3) outside the central shaft (16) and the bushing (12). The drive mechanism includes a motor (301) fixedly connected in the housing (3). The bottom of the output shaft of the motor (301) is connected to the drive wheel (7) by a key. The housing (3) is rotatably connected to the rotating shaft (10) on the side away from the drive wheel (7) inside.

5. The granular fertilizer application device with smooth discharge according to claim 2, characterized in that, The reversing mechanism includes a gear (8) connected by a key to the outside of the rotating shaft (10) and the bushing (12) and a pulley (11) connected by a key to the outside of the rotating shaft (10) and the central shaft (16). The gear (8) on the bushing (12) meshes with the driving wheel (7). The two gears (8) mesh, and the two pulleys (11) are fitted with the same synchronous belt (9).

6. The granular fertilizer application device with smooth discharge according to claim 1, characterized in that, The bottom end of the fertilizer box (1) is provided with a fertilizer pipe (17), the inner wall of the fertilizer pipe (17) is provided with a spiral rifling, the bottom of the fertilizer box (1) is provided with a base (4), and a number of support rods (5) are fixedly connected at equal intervals to the outer side between the fertilizer box (1). The top of the base (4) is provided with a fertilizer discharge device (6) directly below the fertilizer pipe (17).

7. The granular fertilizer application device with smooth discharge according to claim 6, characterized in that, The bottom end of the fertilizer pipe (17) is equidistantly connected to several triangular valve covers (20). The outside of the fertilizer pipe (17) is fixedly connected to an annular chamber (18). The annular chamber (18) is provided with a push plate (24). The valve covers (20) and the push plate (24) are rotatably connected by connecting rods (19).

8. The granular fertilizer application device with smooth discharge according to claim 7, characterized in that, A hydraulic chamber (23) is fixedly connected to one side of the bottom of the fertilizer tank (1). A push rod (22) is fixedly connected in the hydraulic chamber (23). A piston (21) is fixedly connected to one end of the piston rod of the push rod (22). A pipe (25) is provided between the hydraulic chamber (23) and the ring chamber (18).

9. The granular fertilizer application device with smooth discharge according to claim 8, characterized in that, The base (4) is detachably fixed to the middle of the top of the base (26), and the fertilizer discharger (6) is fixedly connected to the top of the base (26).

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