A micropellet coating granulation system and its preparation process

Abstract

The invention provides a micro-pill coating granulation system and a preparation process thereof, which relate to the technical field of coating granulators, and comprise a granulation device, wherein the granulation device is connected with a screening device, the screening device is connected with a coating device, the coating device is connected with a drying storage device, and the coating device and the drying storage device are connected via a synchronous driving mechanism. The screening device is provided to remove unqualified particles larger than 0.45 mm and micro-pill particles smaller than 0.12 mm or raw material dust from micro-pill particles, and after the qualified micro-pill particles are screened out by the screening device, they are sent to the coating device for coating, thereby improving the quality of micro-pill coating granulation, and solving the technical problem that, due to the change of some raw material components in the granulation process of the existing fluidized bed granulator, some raw material dust and unqualified particles are easily generated in the granulation product, and if the coating is directly performed without screening, the quality of micro-pill coating granulation is easily reduced.

Description

Technical Field

[0001] The invention relates to the technical field of coating granulators, in particular to a micropill coating granulation system and a preparation process thereof. Background Art

[0002] Granulation is an essential process in the fields of medicine, chemical industry, fertilizer, feed, food, etc.

[0003] There are two main granulation methods: pan-coating and plastic-coating. Sugar coating pan, tilted disc granulator, centrifugal granulation coating machine, fluidized bed tangential spray are the main equipment for pan-coating micro-pellets; extrusion spheronization is a common method for plastic micro-pellets; pan-coating is to directly make micro-pellets from powder, which is inefficient, and the content of micro-pellets components is uneven when there are multiple components. Extrusion spheronization is to first obtain strip-shaped soft materials, and then enter the spheronization machine to obtain micro-pellets through cutting and centrifugal spheronization. It has fast speed and high yield, but it has process limitations, poor versatility, and some materials cannot be implemented; coating is another process in granulation production. The granulation in the prior art usually uses a fluidized bed granulator. Compared with other wet methods, the fluidized bed granulator has the characteristics of simple process, short operation time, low labor intensity, etc. The granules produced by the fluidized bed granulator have uniform strength, good fluidity, and good compression forming properties;

[0004] The existing fluidized bed granulator may cause some raw material dust and unqualified particles to appear in the finished granulation product due to the change of some raw material components during the granulation process. If the coating is directly carried out without screening, the quality of the micro-pellet coating granulation may be reduced. Summary of the invention

[0005] The present invention provides a micro-pellet coating granulation system and a preparation process thereof, which are used to solve the technical problem that in the existing fluidized bed granulator mentioned above, due to the change of some raw material components during the granulation process, some raw material dust and unqualified particles are easily produced in the granulation product, and if the coating is directly carried out without screening, the quality of the micro-pellet coating granulation is easily reduced.

[0006] In order to solve the above technical problems, the present invention discloses a micro-pellet coating granulation system, including a granulation device, the granulation device is connected to a screening device, the screening device is connected to a coating device, the coating device is connected to a drying and storage device, and the coating device and the drying and storage device are connected through a synchronous driving mechanism.

[0007] Preferably, the screening equipment includes a screening shell, the upper end of the screening shell is connected to the granulation equipment, a screening cavity is provided inside the screening shell, the discharge port of the granulation equipment is connected to the screening cavity, a screening net is fixedly provided at the upper end of the screening cavity, a vibrator is installed on the screening net, and the screening net is arranged corresponding to the discharge port of the granulation equipment.

[0008] Preferably, the screening device also includes a suction cup, an absorption cavity is provided inside the suction cup, a plurality of screening suction holes are provided at the upper end of the suction cup, the plurality of screening suction holes are connected to the absorption cavity, the absorption cavity is connected to a negative pressure pipe, the negative pressure pipe is connected to a power mechanism, and the power mechanism is connected to the suction cup.

[0009] Preferably, the power mechanism includes a driving motor fixedly arranged at the lower end of the screening shell, the driving motor is fixedly connected to pulley 1 and bevel gear 1 through power shaft 1, pulley 1 is connected to pulley 2 through a conveyor belt, pulley 2 is fixedly connected to power shaft 2, power shaft 2 is fixedly connected to suction fan 1, power shaft 2 is rotatably connected to one end of the filter screen on the suction shell, suction fan 1 is arranged in the internal suction chamber of the suction shell, the end of the suction shell away from the filter screen 1 is an open structure, and the suction shell is fixedly connected to the collecting shell, the suction chamber is connected to the collecting chamber inside the collecting shell, and the collecting chamber is connected to the negative pressure pipe.

[0010] Preferably, bevel gear 2 is symmetrically meshed on the upper and lower sides of bevel gear 1, bevel gear 2 is fixedly connected to the rotating sleeve, the rotating sleeve passes through the lower end of the screening shell into the screening cavity and is fixedly connected to the suction cup, and the internal through hole of the rotating sleeve is for the negative pressure tube to pass through.

[0011] Preferably, the coating equipment includes a coating shell, a coating cavity and a coating liquid cavity are provided inside the coating shell, the coating cavity and the coating liquid cavity are distributed on the left and right, the coating cavity is connected with a feeding pipe, the feeding pipe is connected with the side end of the screening cavity, a nozzle is provided at the upper end of the coating cavity, the nozzle is connected with a liquid feeding pipe, the liquid feeding pipe is connected with the liquid feeding cavity, the liquid feeding cavity is arranged inside the liquid feeding shell, the liquid feeding shell is fixedly arranged at the upper end of the coating shell, a stirring rod is rotatably provided in the coating liquid cavity, the stirring rod passes through the side end of the coating liquid cavity and enters the coating cavity and is fixedly connected with the second suction fan, a protective net is provided outside the second suction fan, the protective net is fixedly arranged at the side end of the coating cavity, a number of stirring blades are evenly spaced on the stirring rod, a liquid pipette is connected in the coating liquid cavity and the liquid feeding cavity, and the liquid pipette is connected with a one-way valve, and a liquid pushing plate is slidably provided in the liquid feeding cavity.

[0012] Preferably, the dry storage equipment includes a dry storage shell, in which a drying chamber and a storage chamber are distributed above and below, a discharge hole is connected between the drying chamber and the coating chamber, a plurality of discharge holes are penetrated through the inclined end of the drying chamber, and the plurality of discharge holes are connected with the storage chamber, a blowing fan is provided on the side of the drying chamber away from the discharge hole, the blowing fan is fixedly connected to the connecting shaft, the connecting shaft is rotatably connected to the mounting plate, the mounting plate is fixedly connected to the upper end of the drying chamber, a filter screen 2 is installed at the end of the dry storage shell away from the inclined end, and ultraviolet disinfection lamps are symmetrically provided at the front and rear ends of the drying chamber.

[0013] Preferably, the synchronous drive mechanism includes a drive shell, a motor is installed on the outside of the drive shell through a support plate, the motor is fixedly connected to a rotating shaft, the rotating shaft passes through the side end of the drive shell into a drive cavity and is fixedly connected to a speed bevel gear, the speed bevel gear is meshed with the gear, an annular groove is provided at the lower end of the gear, the annular groove is slidably connected to a guide block, the guide block is slidably connected to a sliding cavity at the side end of the drive shell, the guide block is fixedly connected to an electric telescopic rod, and the electric telescopic rod is fixedly connected to the drive shell.

[0014] Preferably, the gear is fixedly connected to the rotating shaft second, the upper part of the rotating shaft second passes through the upper end of the driving chamber and is fixedly connected to the external cam, the cam is correspondingly arranged, the contact plate is slidably arranged at the upper end of the driving shell, and the contact plate is fixedly connected to the pushing rod, the pushing rod passes through the side end of the liquid delivery shell to enter the liquid delivery chamber and is fixedly connected to the liquid pushing plate, a spring one is fixedly arranged between the contact plate and the driving shell, and a set of springs is arranged on the pushing rod, the middle part of the rotating shaft second is fixedly connected to the bevel gear three, the bevel gear three is meshed with the bevel gear four, the bevel gear four is fixedly connected to the stirring rod passing through the side end of the coating liquid chamber and the side end of the driving chamber, the external stirring rod is fixedly connected to the pulley three, the pulley three is connected to the pulley four through the connecting belt, the pulley four is fixedly connected to the connecting shaft, the lower part of the rotating shaft second passes through the lower end of the driving chamber and the upper end of the drying chamber to enter the drying chamber, and the lower part of the rotating shaft second is fixedly connected to the disc, the side end of the disc is evenly circumferentially provided with a plurality of movable holes, a movable block is slidably arranged in the movable hole, and a spring two is fixedly arranged between the movable block and the movable hole.

[0015] A process for preparing micropellet coating granulation using a micropellet coating granulation system comprises the following steps:

[0016] Step 1: The micropellets prepared by the granulation equipment fall into the screening equipment for screening, and the micropellets with diameters larger than or smaller than the target diameter are removed;

[0017] Step 2: Feed the sieved pellets into the coating equipment;

[0018] Step 3: Add appropriate amount of coating liquid to coat the pellets according to the pellet content;

[0019] Step 4: The coated pellets fall into a dry storage device for dry storage. The technical solution of the present invention is further described in detail below through the accompanying drawings and examples.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] By setting up screening equipment, unqualified particles larger than 0.45 mm and particles smaller than 0.12 mm or raw material dust are removed from the micro-pellets. After the qualified micro-pellets are screened out by the screening equipment, they are sent to the coating equipment for coating, which improves the quality of micro-pellet coating granulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the screening equipment of the present invention;

[0025] Figure 3 It is a schematic diagram of the connection structure between the coating equipment and the drying and storage equipment of the present invention;

[0026] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of area A in FIG.

[0027] In the figure: 1. granulating equipment; 2. screening shell; 3. screening net; 4. suction cup; 5. driving motor; 6. bevel gear 1; 7. conveyor belt; 8. suction shell; 9. power shaft 2; 10. suction fan 1; 11. negative pressure pipe; 12. collecting shell; 13. bevel gear 2; 14. rotating sleeve; 15. feeding pipe; 16. suction fan 2; 17. protective net; 18. coating shell; 19. liquid feeding pipe; 20. liquid suction pipe; 21. one-way valve; 22. liquid feeding shell; 23. liquid pushing plate; 24. pushing rod; 25. spring 1; 26. cam; 27. rotating shaft 2 ; 28. Gear; 29. ​​Motor; 30. Support plate; 31. Rotating shaft one; 32. Speed ​​bevel gear; 33. Blowing fan; 34. Dropping hole; 35. Stirring blade; 36. Storage chamber; 37. Storage shell; 38. Stirring rod; 39. Driving shell; 40. Sliding chamber; 41. Guide block; 42. Electric telescopic rod; 43. Spring two; 44. Connecting belt; 45. Mounting plate; 46. Filter screen two; 47. Movable block; 48. Disc; 49. Bevel gear three; 50. Bevel gear four; 51. Discharge hole; 52. Absorption chamber; 53. Screening suction hole. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0029] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] The present invention provides the following embodiments

[0031] Example 1

[0032] The embodiment of the present invention provides a pellet coating granulation system and a preparation process thereof, such as Figure 1-Figure 2 As shown, it includes a granulating device 1, the granulating device 1 is connected to a screening device, the screening device is connected to a coating device, the coating device is connected to a drying and storage device, and the coating device and the drying and storage device are connected via a synchronous driving mechanism;

[0033] A process for preparing micropellet coating granulation using a micropellet coating granulation system comprises the following steps:

[0034] Step 1: The pellets prepared by the granulation device 1 fall into the screening device for screening, and the pellet particles with diameters larger than or smaller than the target diameter are removed;

[0035] Step 2: Feed the sieved pellets into the coating equipment;

[0036] Step 3: Add appropriate amount of coating liquid to coat the pellets according to the pellet content;

[0037] Step 4: The coated micropellets fall into the dry storage equipment for dry storage.

[0038] The beneficial effects of the above technical solution are:

[0039] Granulating equipment 1 is a fluidized bed granulator, which is provided with a screening device to remove unqualified particles larger than 0.45 mm and unqualified particles smaller than 0.12 mm or raw material dust from the micro-pellets. After the qualified micro-pellets are screened out by the screening device, they are sent to the coating equipment for coating, thereby improving the quality of micro-pellet coating granulation, and solving the technical problem that in the existing fluidized bed granulator, due to the change of some raw material components during the granulation process, some raw material dust and unqualified particles are easily present in the granulated product, and if the coating is directly performed without screening, the quality of the micro-pellet coating granulation is easily reduced.

[0040] Example 2

[0041] On the basis of Example 1, Figure 1-Figure 2 As shown, the screening device includes a screening shell 2, the upper end of the screening shell 2 is connected to the granulating device 1, a screening cavity is provided inside the screening shell 2, the discharge port of the granulating device 1 is connected to the screening cavity, a screening net 3 is fixedly provided at the upper end of the screening cavity, a vibrator is installed on the screening net 3, and the screening net 3 is arranged corresponding to the discharge port of the granulating device 1;

[0042] The screening equipment also includes a suction cup 4, which is a structure with a middle protrusion and inclined two ends. An absorption chamber 52 is provided inside the suction cup 4, and a plurality of screening suction holes 53 are provided at the upper end of the suction cup 4. The plurality of screening suction holes 53 are connected to the absorption chamber 52, and the absorption chamber 52 is connected to the negative pressure pipe 11. The negative pressure pipe 11 is connected to a power mechanism, and the power mechanism is connected to the suction cup 4.

[0043] The beneficial effects of the above technical solution are:

[0044] The filter hole diameter of the screening net 3 is greater than 0.45 mm, and is used to filter unqualified particles larger than 0.45 mm. Installing a vibrator can speed up the screening efficiency of the screening net 3. The filter hole diameter of the screening suction hole 53 is less than 0.12 mm. The screening suction hole 53 on the suction cup 4 is used to absorb micro-pill particles or raw material dust smaller than 0.12 mm. The negative pressure pipe 11 can suck the air in the absorption chamber 52, so that the absorption chamber 52 and the screening suction hole 53 are always in a negative pressure state, which is convenient for sucking micro-pill particles smaller than 0.12 mm into the negative pressure pipe 11, and micro-pill particles larger than 0.12 mm and smaller than 0.45 mm are qualified particles and can proceed to the next coating step.

[0045] Example 3

[0046] On the basis of Example 2, Figure 1-Figure 2As shown, the power mechanism includes a driving motor 5 fixedly arranged at the lower end of the screening shell 2, the driving motor 5 is fixedly connected to the pulley 1 and the bevel gear 1 6 through a power shaft 1, the pulley 1 is connected to the pulley 2 through a conveyor belt 7, the pulley 2 is fixedly connected to the power shaft 2 9, the power shaft 2 9 is fixedly connected to the suction fan 10, the power shaft 2 9 is rotatably connected to one end of the filter screen on the suction shell 8, the suction fan 10 is arranged in the internal suction cavity of the suction shell 8, the end of the suction shell 8 away from the filter screen 1 is an open structure, and the suction shell 8 is fixedly connected to the collecting shell 12, the suction cavity is communicated with the collecting cavity inside the collecting shell 12, and the collecting cavity is communicated with the negative pressure pipe 11;

[0047] Bevel gear 1 6 is symmetrically meshed with bevel gear 2 13 on the upper and lower sides. Bevel gear 1 13 is fixedly connected to a rotating sleeve 14. The rotating sleeve 14 passes through the lower end of the screening shell 2 into the screening cavity and is fixedly connected to the suction cup 4. The internal through hole of the rotating sleeve 14 is for the negative pressure tube 11 to pass through.

[0048] The beneficial effects of the above technical solution are:

[0049] When the driving motor 5 is working, it drives the power shaft 1 to rotate, and the power shaft 1 drives the pulley 1 and the bevel gear 1 6 to rotate. The bevel gear 1 6 is an incomplete bevel gear. When the bevel gear 1 6 rotates, it can drive the bevel gear 2 13 to rotate forward and reversely. The bevel gear 2 13 drives the rotating sleeve 14 to rotate forward and reversely. The rotating sleeve 14 drives the suction cup 4 to rotate forward and reversely. The forward and reverse rotation of the suction cup 4 can also break up the micro-pill particles in the screening chamber to prevent the micro-pill particles from agglomerating together. When the pulley 1 rotates, it drives the pulley 2 to rotate through the conveyor belt 7. The pulley 2 drives the power shaft 2 9 to rotate. The power shaft 2 9 drives the suction fan 10 to rotate. When the suction fan 10 rotates, the air in the suction chamber and the collecting chamber is discharged. The setting of the filter net 1 prevents dust and impurities from entering the suction chamber and the collecting chamber, so that the suction chamber and the collecting chamber are in a negative pressure state, so that the negative pressure tube 11 can suck the micro-pill particles.

[0050] Example 4

[0051] On the basis of Example 3, Figure 1-Figure 4As shown, the coating equipment includes a coating shell 18, a coating cavity and a coating liquid cavity are arranged inside the coating shell 18, the coating cavity and the coating liquid cavity are distributed on the left and right, the coating cavity is communicated with the feeding pipe 15, the feeding pipe 15 is communicated with the side end of the screening cavity, a nozzle is arranged at the upper end of the coating cavity, the nozzle is communicated with the liquid feeding pipe 19, the liquid feeding pipe 19 is communicated with the liquid feeding cavity, the liquid feeding cavity is arranged inside the liquid feeding shell 22, the liquid feeding shell 22 is fixedly arranged at the upper end of the coating shell 18, a stirring rod 38 is rotatably arranged in the coating liquid cavity, the stirring rod 38 penetrates the side end of the coating liquid cavity into the coating cavity and is fixedly connected to the suction fan 16, a protective net 17 is arranged outside the suction fan 16, the protective net 17 is fixedly arranged at the side end of the coating cavity, a plurality of stirring blades 35 are evenly spaced on the stirring rod 38, a liquid pipette 20 is communicated between the coating liquid cavity and the liquid feeding cavity, and the liquid pipette 20 is connected with a one-way valve 21, and a liquid pushing plate 23 is slidably arranged in the liquid feeding cavity;

[0052] The drying and storage equipment includes a drying and storage shell 37, in which a drying chamber and a storage chamber 36 are distributed in the upper and lower parts. A discharge hole 51 is connected between the drying chamber and the coating chamber. A plurality of discharge holes 34 are penetrated through the inclined end of the drying chamber, and the plurality of discharge holes 34 are connected with the storage chamber 36. A blowing fan 33 is provided on the side of the drying chamber away from the discharge hole 51. The blowing fan 33 is fixedly connected to the connecting shaft, and the connecting shaft is rotatably connected to the mounting plate 45. The mounting plate 45 is fixedly connected to the upper end of the drying chamber. A filter screen 46 is installed at the end of the drying and storage shell 37 away from the inclined end, and ultraviolet disinfection lamps are symmetrically provided at the front and rear ends of the drying chamber.

[0053] The beneficial effects of the above technical solution are:

[0054] When coating the micro-pellets, the suction fan 16 rotates to suck the qualified micro-pellets in the screening chamber into the coating chamber. The protection net 17 is set to prevent the suction fan 16 from contacting the micro-pellets and destroying the micro-pellets. The protection net 17 can also be set outside the suction fan 10. The coating liquid in the coating liquid cavity is sent into the liquid delivery cavity through the suction pipe 20. The stirring rod 38 continuously stirs the coating liquid through the stirring blade 35 to improve the uniformity of the coating liquid. Then, the coating liquid is pushed into the liquid delivery pipe 19 through the liquid pushing plate 23. The liquid delivery pipe 19 delivers the coating liquid into the nozzle. The setting of the one-way valve 21 can prevent the coating liquid in the liquid delivery pipe 19 from flowing back. The nozzle will The coating liquid is atomized and then sprayed into the coating chamber, thus completing the coating step of the micro-pill particles. The coated micro-pill particles are sent into the drying chamber through the discharge hole 51. When the blowing fan 33 rotates, the outside air is sent into the drying chamber to dry the coated micro-pill particles. The inclined end of the drying chamber can increase the time of the coated micro-pill particles in the drying chamber. The dried micro-pill particles fall into the storage chamber 36 through the drop hole 34 for storage. By setting a filter screen 46, dust from the outside air can be prevented from entering the drying chamber to contaminate the micro-pill particles. The ultraviolet disinfection lamp is used to disinfect the air in the drying chamber to prevent bacteria from the outside air from contaminating the micro-pill particles.

[0055] Example 5

[0056] On the basis of Example 4, Figure 1-Figure 4 As shown, the synchronous drive mechanism includes a drive shell 39, and a motor 29 is installed on the outside of the drive shell 39 through a support plate 30. The motor 29 is fixedly connected to a rotating shaft 31, and the rotating shaft 31 passes through the side end of the drive shell 39 and enters the drive cavity and is fixedly connected to a speed bevel gear 32. The speed bevel gear 32 is meshed with the gear 28, and an annular groove is provided at the lower end of the gear 28. The annular groove is slidably connected to a guide block 41, and the guide block 41 is slidably connected to a sliding cavity 40 at the side end of the drive shell 39, and the guide block 41 is fixedly connected to an electric telescopic rod 42, and the electric telescopic rod 42 is fixedly connected to the drive shell 39;

[0057] The gear 28 is fixedly connected to the rotating shaft 27, the upper part of the rotating shaft 27 passes through the upper end of the driving chamber and is fixedly connected to the cam 26 outside, the cam 26 is arranged correspondingly to the contact plate, the contact plate is slidably arranged at the upper end of the driving shell 39, and the contact plate is fixedly connected to the push rod 24, the push rod 24 passes through the side end of the liquid delivery shell into the liquid delivery chamber and is fixedly connected to the liquid push plate 23, a spring 25 is fixedly arranged between the contact plate and the driving shell 39, the spring 25 is sleeved on the push rod 24, the middle part of the rotating shaft 27 is fixedly connected to the bevel gear 3 49, the bevel gear 3 49 and the bevel gear Four 50 are meshed, bevel gear four 50 is fixedly connected with the stirring rod 38 that passes through the side end of the coating liquid chamber and the side end of the driving chamber, the external stirring rod 38 is fixedly connected with pulley three, pulley three is connected with pulley four through connecting belt 44, pulley four is fixedly connected with the connecting shaft, the lower part of rotating shaft two 27 passes through the lower end of the driving chamber and the upper end of the drying chamber to enter the drying chamber, and the lower part of rotating shaft two 27 is fixedly connected with disc 48, and a number of movable holes are evenly distributed on the side end of disc 48 in the circumference, a movable block 47 is slidably provided in the movable hole, and a spring two 43 is fixedly provided between the movable block 47 and the movable hole.

[0058] The beneficial effects of the above technical solution are:

[0059] When the motor 29 is working, the motor 29 drives the rotating shaft 1 31 to rotate, the rotating shaft 1 31 drives the speed bevel gear 32 to rotate, the speed bevel gear 32 drives the gear 28 to rotate, the gear 28 drives the rotating shaft 27 to rotate, the rotating shaft 27 drives the cam 26 to rotate, when the protruding end of the cam 26 contacts the contact plate, the contact plate is pushed to move, the contact plate drives the liquid pushing plate 23 to move through the push rod 24, the liquid pushing plate 23 pushes the coating liquid in the liquid delivery chamber into the liquid delivery tube 19, after the protruding end of the cam 26 is out of contact with the contact plate, the contact plate returns to its original position under the elastic action of the spring 1 25, so that the liquid pushing plate 23 returns to its original position, and when the liquid pushing plate 23 returns to its original position During the process of positioning, the space of the liquid delivery chamber becomes larger and the air pressure becomes smaller, so that the purpose of delivering the coating liquid in the coating liquid chamber into the liquid delivery chamber through the liquid pipette 20 is achieved. The rotating shaft 27 can also drive the bevel gear 3 49 and the disc 48 to rotate, the bevel gear 3 49 drives the bevel gear 4 50 to rotate, the bevel gear 4 50 drives the stirring rod 38 to rotate, the stirring rod 38 drives the pulley 3 and the suction fan 2 16 to rotate, the pulley 3 drives the pulley 4 to rotate through the connecting belt 44, the pulley 4 drives the blowing fan 33 to rotate through the connecting shaft, and when the disc 48 rotates, the movable block 47 moves outward under the centrifugal action, and the movable block 47 hits the filter screen 2 46 to shake off the dust on the filter screen 2 46;

[0060] By setting an electric telescopic rod 42, the electric telescopic rod 42 drives the guide block 41 to move up and down, and the guide block 41 drives the gear 28 to move downward. When the gear 28 moves downward, the diameter of the variable speed bevel gear 32 corresponding to the meshing position of the variable speed bevel gear 32 changes, so that when the variable speed bevel gear 32 rotates, the rotation speed of the gear 28 can be changed, and then the rotation speed of the blowing fan 33, the rotation speed of the suction fan 16 and the reciprocating speed of the liquid pushing plate 23 can be changed synchronously. When adjusting the feed amount of the micro-pellet particles, the rotation speed of the suction fan 16 needs to be increased. At the same time, the spray amount of the coating liquid and the blowing amount in the drying chamber need to be increased. Therefore, the setting of the synchronous drive mechanism can synchronously realize the feeding of the micro-pellet particles, the spraying of the coating liquid, and the flow rate of the airflow in the drying chamber by only setting one motor 29, which not only saves costs, but also does not need to set up multiple electrical components and realize the coating and drying steps of the micro-pellet particles through the cooperation of multiple electrical components, thereby reducing the process complexity.

[0061] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A pellet coating granulation system, characterized in that: The invention comprises a granulating device (1), wherein the granulating device (1) is connected to a screening device, the screening device is connected to a coating device, the coating device is connected to a drying and storage device, and the coating device and the drying and storage device are connected via a synchronous driving mechanism; The screening device comprises a screening shell (2), the upper end of the screening shell (2) being connected to the granulating device (1), a screening cavity being provided inside the screening shell (2), the discharge port of the granulating device (1) being connected to the screening cavity, a screening net (3) being fixedly provided at the upper end of the screening cavity, a vibrator being installed on the screening net (3), and the screening net (3) being arranged corresponding to the discharge port of the granulating device (1); The screening device further comprises a suction cup (4), an absorption chamber (52) is provided inside the suction cup (4), a plurality of screening suction holes (53) are provided at the upper end of the suction cup (4), the plurality of screening suction holes (53) are connected to the absorption chamber (52), the absorption chamber (52) is connected to a negative pressure pipe (11), the negative pressure pipe (11) is connected to a power mechanism, and the power mechanism is connected to the suction cup (4); The power mechanism comprises a driving motor (5) fixedly arranged at the lower end of the screening shell (2), the driving motor (5) being fixedly connected to a pulley 1 and a bevel gear 1 (6) via a power shaft 1, the pulley 1 being connected to a pulley 2 via a conveyor belt (7), the pulley 2 being fixedly connected to a power shaft 2 (9), the power shaft 2 (9) being fixedly connected to a suction fan 1 (10), the power shaft 2 (9) being rotatably connected to one end of a filter screen on the suction shell (8), the suction fan 1 (10) being arranged in an internal suction cavity of the suction shell (8), the end of the suction shell (8) away from the filter screen 1 being an open structure, the suction shell (8) being fixedly connected to a collecting shell (12), the suction cavity being connected to a collecting cavity inside the collecting shell (12), and the collecting cavity being connected to a negative pressure pipe (11); Bevel gear 2 (13) is symmetrically meshed with bevel gear 1 (6) on both upper and lower sides. Bevel gear 2 (13) is fixedly connected to a rotating sleeve (14). The rotating sleeve (14) passes through the lower end of the screening shell (2) into the screening cavity and is fixedly connected to the suction cup (4). The internal through hole of the rotating sleeve (14) is for the negative pressure pipe (11) to pass through. The coating device comprises a coating shell (18), wherein a coating cavity and a coating liquid cavity are arranged inside the coating shell (18), the coating cavity and the coating liquid cavity are distributed on the left and right, the coating cavity is connected with a feeding pipe (15), the feeding pipe (15) is connected with a side end of the screening cavity, a nozzle is arranged at the upper end of the coating cavity, the nozzle is connected with a liquid feeding pipe (19), the liquid feeding pipe (19) is connected with the liquid feeding cavity, the liquid feeding cavity is arranged inside a liquid feeding shell (22), the liquid feeding shell (22) is fixedly arranged at the upper end of the coating shell (18), and a rotating device is arranged in the coating liquid cavity. A stirring rod (38) is provided, the stirring rod (38) passes through the side end of the coating liquid cavity and enters the coating cavity and is fixedly connected to the second suction fan (16), a protective net (17) is provided outside the second suction fan (16), the protective net (17) is fixedly arranged at the side end of the coating cavity, a plurality of stirring blades (35) are evenly spaced on the stirring rod (38), a liquid suction pipe (20) is connected in the coating liquid cavity and the liquid delivery cavity, and the liquid suction pipe (20) is connected to a one-way valve (21), and a liquid push plate (23) is slidably provided in the liquid delivery cavity; The drying storage device comprises a drying storage shell (37), wherein a drying chamber and a storage chamber (36) are arranged in the upper and lower parts of the drying storage shell (37), a discharge hole (51) is connected between the drying chamber and the coating chamber, a plurality of discharge holes (34) are provided through the inclined end of the drying chamber, the plurality of discharge holes (34) are connected with the storage chamber (36), a blowing fan (33) is provided on the side of the drying chamber away from the discharge hole (51), the blowing fan (33) is fixedly connected to a connecting shaft, the connecting shaft is rotatably connected to a mounting plate (45), the mounting plate (45) is fixedly connected to the upper end of the drying chamber, a filter screen 2 (46) is installed at one end of the drying storage shell (37) away from the inclined end, and ultraviolet disinfection lamps are symmetrically provided at the front and rear ends of the drying chamber; The synchronous drive mechanism comprises a drive housing (39), the outside of the drive housing (39) is equipped with a motor (29) through a support plate (30), the motor (29) is fixedly connected to a rotating shaft (31), the rotating shaft (31) passes through a side end of the drive housing (39) and enters a drive cavity and is fixedly connected to a speed bevel gear (32), the speed bevel gear (32) is meshed with a gear (28), an annular groove is provided at the lower end of the gear (28), the annular groove is slidably connected to a guide block (41), the guide block (41) is slidably connected to a sliding cavity (40) at a side end of the drive housing (39), the guide block (41) is fixedly connected to an electric telescopic rod (42), and the electric telescopic rod (42) is fixedly connected to the drive housing (39); The gear (28) is fixedly connected to the second rotating shaft (27). The upper part of the second rotating shaft (27) passes through the upper end of the driving chamber and is fixedly connected to the external cam (26). The cam (26) is arranged corresponding to the contact plate. The contact plate is slidably arranged on the upper end of the driving shell (39). The contact plate is fixedly connected to the push rod (24). The push rod (24) passes through the side end of the liquid delivery shell and enters the liquid delivery chamber and is fixedly connected to the push plate (23). A spring (25) is fixedly arranged between the contact plate and the driving shell (39). The spring (25) is sleeved on the push rod (24). The middle part of the second rotating shaft (27) is fixedly connected to the third bevel gear (49). The third bevel gear (49) The bevel gear 4 (50) is meshed with the bevel gear 4 (50), and the bevel gear 4 (50) is fixedly connected to the stirring rod (38) penetrating the side end of the coating liquid chamber and the side end of the driving chamber. The external stirring rod (38) is fixedly connected to the pulley 3, and the pulley 3 is connected to the pulley 4 through the connecting belt (44). The pulley 4 is fixedly connected to the connecting shaft. The lower part of the rotating shaft 2 (27) penetrates the lower end of the driving chamber and the upper end of the drying chamber and enters the drying chamber, and the lower part of the rotating shaft 2 (27) is fixedly connected to the disc (48). The side end of the disc (48) is evenly distributed with a plurality of movable holes in the circumferential direction, and a movable block (47) is slidably provided in the movable hole. A spring 2 (43) is fixedly provided between the movable block (47) and the movable hole.

2. A process for preparing pellet coating granules using the pellet coating granulation system as claimed in claim 1, characterized in that: The following steps are involved: Step 1: The micropellets prepared by the granulation device (1) fall into the screening device for screening, and the micropellets with diameters larger than or smaller than the target diameter are removed; Step 2: Feed the sieved pellets into the coating equipment; Step 3: Add appropriate amount of coating liquid to coat the pellets according to the pellet content; Step 4: The coated micropellets fall into the dry storage equipment for dry storage.

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