Fertilizer coating device and method

Abstract

The invention discloses a fertilizer coating device and method, wherein the device comprises a box body, a feed hopper connected to the interior of the box body is provided on the top of the box body, a first sieve plate is provided in the box body, one end of the first sieve plate is located below the feed hopper, a glue spraying hose with a liquid outlet facing the first sieve plate is installed on the box body, and a drying fan with an air outlet facing the second sieve plate is installed in the box body; a fixed-feeding device is installed in the box body, and the fixed-feeding device can intermittently and quantitatively receive material bodies falling from the feed hopper and transmit them to the first sieve plate. The invention can intermittently and quantitatively receive material bodies falling from the feed hopper and transmit them to the first sieve plate by adding a fixed-feeding device between the feed hopper and the first sieve plate, thereby avoiding the situation that too much material bodies fall onto the sieve in a unit time, resulting in the sieve plate being unable to separate the crushed fertilizer raw materials mixed in the material bodies in time and the separation effect being poor, thereby ensuring the product quality of the fertilizer produced after coating.

Description

Technical Field

[0001] The invention relates to the technical field of fertilizer production, and in particular to a fertilizer coating device and method. Background Art

[0002] The existing fertilizer coating equipment often has the phenomenon of coating liquid agglomeration during use, and the crushed raw materials in the coating process cannot be removed, so they are mixed into the finished product, thereby reducing the quality of the product. The Chinese utility model patent with patent number CN216273853U discloses a fertilizer coating equipment, including a shell, a spray mechanism is fixedly installed on the inner top of the shell, a vibration mechanism is provided at the bottom of the spray mechanism, a drying fan is fixedly installed on one side of the outer surface of the shell, and the air outlet of the drying fan is fixedly connected with a hose, and the hose passes through the outer surface of the shell and extends to the inner side of the vibration mechanism. Through the provided vibration mechanism and spray mechanism, the granular fertilizer can be rolled, so as to be evenly coated with the coating liquid to avoid the coating liquid agglomeration. At the same time, the crushed fertilizer raw materials can be removed to avoid the crushed fertilizer raw materials from mixing into the finished product, thereby improving the product quality.

[0003] This patented technology has certain defects, namely: the fertilizer falls directly onto the screen after passing through the feed hopper. If the amount of fertilizer falling out of the feed hopper suddenly increases, too much material will fall onto the screen per unit time, causing the screen plate to be unable to separate the crushed fertilizer raw materials mixed in the material in time and the separation effect is poor, affecting the product quality of the fertilizer produced after coating. Summary of the invention

[0004] In order to solve the technical problems mentioned in the above background technology, the present invention provides a fertilizer coating device and method.

[0005] The present invention is implemented by the following technical scheme: a fertilizer coating equipment, including a box body, a feed hopper connected to the interior of the box body on the top, a first sieve plate inside the box body, one end of the first sieve plate is located below the feed hopper, and the other end is movably connected to a second sieve plate inclined downward, one end of the second sieve plate is connected to a material guide plate connected to the outside, a glue spray hose with a liquid outlet facing the first sieve plate is installed on the box body, and a drying fan with an air outlet facing the second sieve plate is installed in the box body; a fixed feeding device is installed in the box body, and the fixed feeding device can intermittently and quantitatively receive the material falling from the feed hopper and transmit it to the first sieve plate.

[0006] As a further improvement of the above scheme, the fixed feeding device includes a first turntable rotatably arranged below the feed hopper, a receiving box with an open top is eccentrically arranged on the top of the first turntable, a baffle plate capable of closing the feed hopper outlet is elastically inserted into the feed hopper outlet, an unlocking mechanism is arranged on the receiving box, the unlocking mechanism is driven by the rotation of the first turntable, and can release the blocking state of the baffle plate on the feed hopper outlet; the centrifugal side of the receiving box has a discharge port, and a pushing mechanism is arranged on the receiving box, the pushing mechanism is driven by the rotation of the first turntable, and can push the material body in the receiving box toward the first screen plate.

[0007] As a further improvement of the above scheme, the unlocking mechanism includes a pressure plate fixed on the front side wall of the receiving box in the rotation direction, and a pressure rod is inserted into the bottom of the baffle plate, and the pressure rod is squeezed and fitted with the pressure plate after contact.

[0008] As a further improvement of the above scheme, a plate slot connected to the feed hopper is fixed on one side of the feed hopper, and the plate slot is located between the feed hopper and the spray hose, one end of the baffle plate is inserted in the plate slot and a first spring is provided between the corresponding slot wall of the plate slot, and when the first spring is in a non-deformed state, the baffle plate completely blocks the discharge port of the feed hopper.

[0009] As a further improvement of the above scheme, a second reel is fixedly inserted on the top of the pressure rod, a second reel hole is opened on the feed hopper, one end of the second reel is inserted in the second reel hole, a second coil spring is sleeved on the outside of the second reel, two ends of the second coil spring are respectively fixed on the second reel and the inner wall of the second reel hole, and the elastic force of the second coil spring is greater than the elastic force of the first spring.

[0010] As a further improvement of the above scheme, the pushing mechanism includes a cylinder radially inserted on the centripetal side of the receiving box, the centripetal end of the cylinder is provided with a first rod groove, the first connecting rod is inserted in the first rod groove, an arc-shaped limit block is suspended above the position of the first screen plate in the box body, the curvature of the centrifugal side arc surface of the limit block in the rotation direction of the first turntable gradually decreases, the centripetal end of the first connecting rod and the centrifugal side of the limit block are squeezed and matched after contact, a protrusion is provided on the outer side wall of the centrifugal end of the first connecting rod, a spiral groove is axially provided on the inner side wall of the first rod groove, and the protrusion is slidably engaged in the spiral groove,

[0011] The centrifugal end of the cylinder is provided with a second rod groove, in which a second connecting rod is threadedly inserted, and the centrifugal end of the second connecting rod extends into the material receiving box and is fixed with a push plate, and a telescopic rod is provided between the push plate and the material receiving box.

[0012] As a further improvement of the above scheme, the centripetal end of the first connecting rod is arranged on a roller which rolls and squeezes with the centrifugal side of the limit block after contacting the limit block, and a second spring is sleeved on the outer side of the first connecting rod between the roller and the centripetal end of the cylinder.

[0013] As a further improvement of the above solution, a cross arm is fixed in the box body, a vertical shaft is rotatably arranged on the top of the cross arm, the top of the vertical shaft is fixed at the bottom center of the first turntable, a motor is installed at the bottom of the cross arm, and the vertical shaft is connected to the motor output shaft.

[0014] As a further improvement of the above scheme, a second turntable is sleeved and fixed on the vertical shaft, a protrusion is eccentrically fixed on the top surface of the second turntable, and the bottom of one end of the first sieve plate away from the second sieve plate contacts the protrusion and then slides and squeezes together.

[0015] The present invention also provides a fertilizer coating method applied to any of the above-mentioned devices, which comprises the following steps:

[0016] S1. Put fertilizer into the lower hopper;

[0017] S2, controlling the motor to start, using the fixed feeding device to intermittently and quantitatively receive the material body falling from the feed hopper, and transmitting it to the first screen plate for glue spraying and screening;

[0018] S3, drying the screened fertilizer and transferring it to the feeding chute through the guide plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The fertilizer coating equipment of the present invention can intermittently and quantitatively receive the material falling from the feed hopper and transmit it to the first screen plate by adding a fixed feeding device between the feed hopper and the first screen plate, so as to avoid too much material falling onto the screen in a unit time, which causes the screen plate to be unable to separate the crushed fertilizer raw materials mixed in the material in time and the separation effect is poor. At the same time, the material can also be fully contacted with the glue liquid to ensure the product quality of the fertilizer produced after coating.

[0021] 2. The fertilizer coating equipment of the present invention, by means of structures such as side covers and bevel teeth added to the receiving box, can prevent the fertilizer from being centrifugally thrown out and falling when the receiving box follows the rotation of the first turntable after receiving the material and before moving to the first sieve plate, and can automatically control the side plate to open when the receiving box moves to the first sieve plate so that the push plate can push the fertilizer out of the receiving box.

[0022] 3. The fertilizer coating equipment of the present invention, by providing a second turntable and a protrusion, can utilize the rotation of the first turntable to drive the first screen plate to rotate up and down, continuously change the inclination angle of the first screen plate, and improve the screening efficiency and transmission efficiency of the fertilizer on the screen plate.

[0023] 4. The coating method of the present invention can make the fertilizer and the glue liquid contact more fully by adopting a fixed feeding device in the method, and at the same time can efficiently screen out the crushed fertilizer raw materials mixed in the material body, so that the quality of the produced fertilizer product is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 for Figure 1 A schematic diagram of the top view of the first rotating disc, the first sieve plate, the material receiving box and other components;

[0026] Figure 3 for Figure 1 The enlarged structural diagram at A in the middle;

[0027] Figure 4 for Figure 2 A schematic diagram of the cross-sectional structure of the intermediate material receiving box;

[0028] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of the middle cylinder and other components;

[0029] Figure 6 for Figure 1 A schematic diagram of the cross-sectional structure of the central material receiving box from the front view;

[0030] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure of the side cover on the center receiving box in the unfolded state.

[0031] Description of main symbols:

[0032] 1. Box body; 2. Feed hopper; 3. First sieve plate; 4. Second sieve plate; 5. Guide plate; 6. Discharge chute; 7. Drying fan; 8. First turntable; 9. Receiving box; 10. Baffle plate; 11. Plate slot; 12. Pressure rod; 13. Pressure plate; 14. Side cover; 15. Push plate; 16. Cylinder body; 17. Roller; 18. First connecting rod; 19. Limit block; 20. Second connecting rod; 21. Telescopic rod; 22. First rod slot; 23. Second rod slot; 24. Spiral wire slot; 25. Protrusion; 26. First bevel gear; 27. Second bevel gear; 28. First wire wheel; 29. ​​Second wire wheel; 30. First reel; 31. Cross arm; 32. Motor; 33. Vertical shaft; 34. Second turntable; 35. Protrusion; 36. Second reel; 37. Glue spray hose. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0034] Example 1

[0035] Please combine Figures 1 to 7 The fertilizer coating equipment includes a box body 1, a feed hopper 2 connected to the interior of the box body 1 is provided on the top of the box body 1, a first sieve plate 3 is provided in the box body 1, one end of the first sieve plate 3 is located below the feed hopper 2, and the other end is movably connected to a second sieve plate 4 inclined downward, and the first sieve plate 3 and the second sieve plate 4 are both provided with screens, through which the crushed fertilizer raw materials mixed in the material body can be filtered out, thereby improving the quality of the produced products.

[0036] The box body 1 is provided with a glue spraying hose 37 with a liquid outlet facing the first sieve plate 3, and the glue spraying hose 37 is connected to the external coating liquid conveying equipment to coat the fertilizer particles. The box body 1 is provided with a drying fan 7 with an air outlet facing the second sieve plate 4 to dry the fertilizer. One end of the second sieve plate 4 is connected to a material guide plate 5 connected to the outside, and one side of the box body 1 is provided with a material discharge chute 6 into which the material guide plate 5 can extend to output the coated material. The bottom of the box body 1 is provided with a waste outlet to discharge the crushed fertilizer raw materials mixed in the material out of the box body 1.

[0037] A fixed-feed device is installed in the box 1, which can intermittently and quantitatively receive the material falling from the feed hopper 2 and transfer it to the first screen plate 3, so as to avoid too much material falling onto the screen plate in a unit time, resulting in poor separation effect of the screen plate on the crushed fertilizer raw materials mixed in the material, so as to stabilize the amount of material transferred to the first screen plate 3 and ensure the quality of the fertilizer produced by the coating.

[0038] The fixed-feeding device includes a first turntable 8 rotatably arranged below the feed hopper 2, a receiving box 9 with an open top is eccentrically arranged on the top of the first turntable 8, a baffle plate 10 capable of closing the discharge port of the feed hopper 2 is elastically inserted thereon, and an unlocking mechanism is arranged on the receiving box 9. The unlocking mechanism is driven by the rotation of the first turntable 8 and can release the blocking state of the baffle plate 10 on the discharge port of the feed hopper 2, so that when the receiving box 9 rotates to below the discharge port of the feed hopper 2, it can promptly receive the fertilizer dropped from the discharge port.

[0039] The centrifugal side of the material receiving box 9 has a discharge port (not shown), and the material receiving box 9 is provided with a pushing mechanism, which is driven by the rotation of the first turntable 8 and can push the material in the material receiving box 9 toward the first screen plate 3.

[0040] The unlocking mechanism includes a pressure plate 13 fixed on the front side wall of the receiving box 9 in the rotation direction. A pressure rod 12 is inserted at the bottom of the blocking plate 10. The pressure rod 12 is squeezed and matched with the pressure plate 13 after contact.

[0041] A plate slot 11 connected to the feed hopper 2 is fixed on one side of the feed hopper 2, and the plate slot 11 is located between the feed hopper 2 and the glue spray hose 37. One end of the baffle plate 10 is inserted into the plate slot 11 and a first spring (not marked) is arranged between the corresponding slot wall of the plate slot 11. When the first spring is in a non-deformed state, the baffle plate 10 completely blocks the discharge port of the feed hopper 2, and at this time, the pressure plate 13 does not touch the pressure rod 12.

[0042] A second reel 36 is fixedly inserted on the top of the pressure-bearing rod 12, and a second reel hole (not shown) is opened on the feed hopper 2. One end of the second reel 36 is inserted in the second reel hole. A second coil spring (not shown) is sleeved on the outside of the second reel 36. The two ends of the second coil spring are respectively fixed to the second reel 36 and the inner wall of the second reel hole. The elastic force of the second coil spring is greater than the elastic force of the first spring. When the pressure plate 13 touches the pressure-bearing rod 12, the material baffle plate 10 will be driven to move toward the plate slot 11 through the pressure-bearing rod 12, so that the fertilizer can fall out of the feeding port of the feed hopper 2. When the material baffle plate 10 moves in the plate slot 11 to contact the slot wall (the first spring is gradually compressed), the slot wall of the plate slot 11 will apply a reaction force to the pressure rod 12. Under the continued thrust of the pressure plate 13, the pressure rod 12 will be driven to deflect so that the pressure plate 13 can pass over. When the pressure plate 13 passes, the first spring force is released to push the baffle plate 10 to move in the opposite direction to reclose the discharge port of the feed hopper 2, and the pressure rod 12 will return to a position perpendicular to the baffle plate 10 under the action of the second coil spring force.

[0043] The pushing mechanism includes a cylinder 16 radially inserted on the centripetal side of the receiving box 9, a first rod groove 22 is provided at the centripetal end of the cylinder 16, a first connecting rod 18 is inserted on the first rod groove 22, an arc-shaped limit block 19 is suspended above the position corresponding to the first screen plate 3 in the box body 1, the curvature of the centrifugal side arc surface of the limit block 19 in the rotation direction of the first turntable 8 gradually decreases, the centripetal end of the first connecting rod 18 and the centrifugal side of the limit block 19 are squeezed and matched after contact, a protrusion 25 is provided on the outer side wall of the centrifugal end of the first connecting rod 18, a spiral groove 24 is axially provided on the inner side wall of the first rod groove 22, and the protrusion 25 is slidably engaged in the spiral groove 24.

[0044] A second rod groove 23 is formed at the centrifugal end of the cylinder 16, in which a second connecting rod 20 is threadedly inserted. The centrifugal end of the second connecting rod 20 extends into the material receiving box 9 and is fixed with a push plate 15. A telescopic rod 21 is provided between the push plate 15 and the material receiving box 9.

[0045] The centripetal end of the first connecting rod 18 is arranged on the roller 17 which rolls and squeezes with the centrifugal side of the limit block 19 , and a second spring is sleeved on the outer side of the first connecting rod 18 between the roller 17 and the centripetal end of the cylinder 16 .

[0046] A cross arm 31 is fixed in the box body 1, and a vertical shaft 33 is rotatably arranged on the top of the cross arm 31. The top of the vertical shaft 33 is fixed at the bottom center of the first turntable 8. A motor 32 is installed at the bottom of the cross arm 31, and the output shaft of the motor 32 is connected to the vertical shaft 33.

[0047] The working position of this embodiment is: when the motor 32 drives the vertical shaft 33 and the first rotating disk 8 to rotate through its output shaft, when the receiving box 9 on the first rotating disk 8 rotates to the feeding port of the feed hopper 2, the pressure plate 13 will first squeeze the pressure rod 12 to drive the baffle plate 10 to open the feeding port, so that the fertilizer falls into the opening of the receiving box 9. When the baffle plate 10 moves in the plate slot 11 to contact the slot wall (the first spring is gradually compressed), the slot wall of the plate slot 11 will apply a reaction force to the pressure rod 12, and the pressure rod 12 will be deflected by a certain angle under the thrust generated by the rotation of the pressure plate 13, so that the pressure plate 13 can pass over. When the pressure plate 13 passes, the first spring force is released to push the baffle plate 10 to move in the opposite direction to reclose the discharge port of the feed hopper 2, and the pressure rod 12 will return to a position perpendicular to the baffle plate 10 under the action of the second coil spring force to facilitate the next contact and cooperation with the pressure plate 13 on the receiving box 9.

[0048] Subsequently, the receiving box 9 gradually rotates to the first sieve plate 3 following the first rotating disk 8, at which time the roller 17 contacts the stop block 19 and is gradually subjected to the extrusion force generated by the curvature change of the centrifugal side wall of the stop block 19, forcing the roller 17 to drive the first connecting rod 18 to move toward the second connecting rod 20, and compress the second spring, so that the protrusion 25 squeezes the groove wall of the friction spiral groove 24, so that the cylinder 16 rotates, and the rotation of the cylinder 16 interacts with the second connecting rod 20, and drives the push plate 15 to push the fertilizer in the receiving box 9 to the first sieve plate 3 under the limiting action of the telescopic rod 21. When the roller 17 is separated from the stop block 19, the elastic force of the second spring is released to drive the roller 17 to drive the first connecting rod 18 to move in the opposite direction to the initial position, which will cause the cylinder 16 to rotate in the opposite direction, and the second connecting rod 20 will drive the push plate 15 to return to the initial position for the next material pushing operation.

[0049] As the first turntable 8 continues to rotate, this process is repeated continuously, and finally a cyclic operation mode is achieved in which the receiving box 9 automatically receives the material at the discharge port of the feed hopper 2 and then automatically discharges the material at the first screen plate 3.

[0050] In order to prevent the centrifugal spillage of fertilizers from occurring after the receiving box 9 receives the materials and before it moves to the first screen plate 3, the present embodiment installs a side cover 14 at the discharge port on the centrifugal side of the receiving box 9, a first reel 30 is fixedly passed through the top of the side cover 14, a first reel hole is provided on the inner side wall of the receiving box 9, one end of the first reel 30 is inserted into the first reel hole, and a first coil spring is sleeved on the first reel 30, and the two ends of the first coil spring are respectively fixed to the outer side wall of the first reel 30 and the inner side wall of the first reel hole. When the first coil spring is not deformed, the side cover 14 completely closes the discharge port.

[0051] A first bevel gear 26 is sleeved and fixed on the outer side of the cylinder 16, and a second bevel gear 27 meshing with the first bevel gear 26 is installed on the inner wall of the receiving box 9. A first wire wheel 28 is coaxially fixed on the second bevel gear 27. A second wire wheel 29 is sleeved and fixed on the first reel 30. A pull rope is wound around the second wire wheel 29, and the free end of the pull rope is bolted to the first wire wheel 28.

[0052] Therefore, after the material receiving box 9 receives the material and has not moved to the first screen plate 3, the cylinder 16 does not rotate because the roller 17 is not squeezed by the limit block 19. At this time, the side cover 14 completely closes the discharge port to prevent the fertilizer from centrifugally falling when the material receiving box 9 rotates with the first turntable 8. When the roller 17 is pressed to cause the cylinder 16 to rotate, it will drive the first bevel gear 26, the second bevel gear 27, and the first wire wheel 28 to rotate, so that the first wire wheel 28 reels the pull rope and forces the second wire wheel 29 to release the rope, causing the first reel 30 to drive the side cover 14 to rotate and open (the first coil spring is gradually compressed). When the roller 17 is no longer pressed, the cylinder 16 reverses and drives the first bevel gear 26, the second bevel gear 27, and the first wire wheel 28 to reverse and rotate, so that the first wire wheel 28 releases the pull rope, and the second wire wheel 29 will retract the rope under the action of the first coil spring, and the side cover 14 will be driven to rotate and close through the first reel 30.

[0053] Example 2

[0054] Please combine Figures 1 to 7 This embodiment is an improved version of the embodiment 1. A second turntable 34 is sleeved and fixed on the vertical shaft 33. A protrusion 35 is eccentrically fixed on the top surface of the second turntable 34. The bottom of one end of the first sieve plate 3 away from the second sieve plate 4 contacts the protrusion 35 and then slides and squeezes together.

[0055] In this embodiment, whenever the protrusion 35 on the second turntable 34 rotates and presses the bottom of the first sieve plate 3, it will drive the first sieve plate 3 to rotate tiltably, and the inclination angle of the first sieve plate 3 will be continuously changed in this reciprocating manner, thereby improving the screening efficiency and transmission efficiency of the fertilizer on the sieve plate.

[0056] Example 3

[0057] This embodiment provides a coating method applied to a device of any of the above embodiments, comprising the following steps:

[0058] S1, put fertilizer into the lower hopper 2;

[0059] S2, the control motor 32 is started, and the fixed feeding device is used to intermittently and quantitatively receive the material falling from the feed hopper 2, and transmit it to the first screen plate 3 for glue spraying and screening;

[0060] S3, drying the screened fertilizer and transferring it to the feeding chute through the guide plate.

[0061] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A fertilizer coating device, characterized in that: It comprises a box body, the top of the box body is provided with a feed hopper connected to the inside thereof, the box body is provided with a first sieve plate, one end of the first sieve plate is located below the feed hopper, and the other end is movably connected to a second sieve plate inclined downward, one end of the second sieve plate is connected to a material guide plate connected to the outside, a glue spraying hose with a liquid outlet facing the first sieve plate is installed on the box body, and a drying fan with an air outlet facing the second sieve plate is installed in the box body; a fixed feeding device is installed in the box body, and the fixed feeding device can intermittently and quantitatively receive the material body falling from the feed hopper and transmit it to the first sieve plate; The fixed feeding device comprises a first rotating disk rotatably arranged below the feed hopper, a receiving box with an open top is eccentrically arranged on the top of the first rotating disk, a baffle plate capable of closing the feed hopper discharge port is elastically inserted on the feed hopper discharge port, an unlocking mechanism is arranged on the receiving box, the unlocking mechanism is driven by the rotation of the first rotating disk and can release the blocking state of the feed hopper discharge port by the baffle plate; the centrifugal side of the receiving box has a discharge port, and the receiving box is provided with a pushing mechanism, the pushing mechanism is driven by the rotation of the first rotating disk and can push the material body in the receiving box toward the first screen plate; The unlocking mechanism comprises a pressure plate fixed on the side wall of the front side of the receiving box in the rotation direction, a pressure rod is inserted at the bottom of the baffle plate, and the pressure rod is pressed and matched with the pressure plate after contact; A plate slot connected to the feed hopper is fixed on one side of the feed hopper, and the plate slot is located between the feed hopper and the glue spraying hose. One end of the baffle plate is inserted into the plate slot and a first spring is arranged between the baffle plate and the corresponding slot wall of the plate slot. When the first spring is in a non-deformed state, the baffle plate completely blocks the feed opening of the feed hopper. A second reel is fixedly inserted at the top of the pressure bearing rod, a second reel hole is opened on the feed hopper, one end of the second reel is inserted into the second reel hole, a second coil spring is sleeved on the outer side of the second reel, two ends of the second coil spring are respectively fixed to the second reel and the inner wall of the second reel hole, and the elastic force of the second coil spring is greater than the elastic force of the first spring; The pushing mechanism comprises a cylinder body radially inserted on the centripetal side of the receiving box, the cylinder body having a first rod groove formed at the centripetal end, a first connecting rod inserted on the first rod groove, an arc-shaped limit block is suspended above the position of the first sieve plate in the box body, the curvature of the centrifugal side arc surface of the limit block in the rotation direction of the first turntable gradually decreases, the centripetal end of the first connecting rod contacts and squeezes and fits with the centrifugal side of the limit block, a protrusion is provided on the outer side wall of the centrifugal end of the first connecting rod, a spiral groove is axially formed on the inner side wall of the first rod groove, and the protrusion is slidably engaged in the spiral groove, A second rod groove is formed at the centrifugal end of the cylinder, a second connecting rod is threadedly inserted into the second rod groove, the centrifugal end of the second connecting rod extends into the material receiving box and is fixed with a push plate, and a telescopic rod is provided between the push plate and the material receiving box; The centripetal end of the first connecting rod is arranged on a roller which rolls and squeezes with the centrifugal side of the limit block after contacting the limit block, and a second spring is sleeved on the outer side of the first connecting rod between the roller and the centripetal end of the cylinder.

2. The fertilizer coating device according to claim 1, characterized in that: A cross arm is fixed in the box body, a vertical shaft is rotatably arranged on the top of the cross arm, the top of the vertical shaft is fixed at the bottom center of the first turntable, a motor is installed at the bottom of the cross arm, and the vertical shaft is connected to the output shaft of the motor.

3. The fertilizer coating device according to claim 2, characterized in that: A second rotating disk is sleeved and fixed on the vertical shaft, a protrusion is eccentrically fixed on the top surface of the second rotating disk, and the bottom of one end of the first sieve plate away from the second sieve plate contacts the protrusion and then slides and squeezes to fit.

4. A coating method for use with an apparatus as claimed in any one of claims 2 or 3, characterized in that: The steps include: S1. Put fertilizer into the lower hopper; S2, controlling the motor to start, using the fixed feeding device to intermittently and quantitatively receive the material body falling from the feed hopper, and transmitting it to the first screen plate for glue spraying and screening; S3, drying the screened fertilizer and transferring it to the feeding chute through the guide plate.

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