Granular drug coating equipment and coating method

Abstract

The present invention relates to the field of drug coating technology, and more particularly to a granular drug coating device and coating method, comprising a housing, a drying device, and a coating device; a tumbling barrel rotatably disposed within the housing, the tumbling barrel being a tubular structure, the axis of the tumbling barrel forming an acute angle with the horizontal plane, the higher end of the tumbling barrel being open for introducing granular drugs, and the lower end of the tumbling barrel being open for discharging dried granular drugs, and a through-hole being formed through the side wall of the tumbling barrel; a plurality of protruding rods being provided, fixedly disposed on the inner wall of the tumbling barrel along the axis of the tumbling barrel, and evenly arranged around the axis of the tumbling barrel; a driving device being disposed at one end of the tumbling barrel; a cleaning device being disposed throughout the tumbling barrel; a ventilation device being disposed on one side of the tumbling barrel; a waste collection device being disposed at the lower portion of the tumbling barrel; and a sealing plate being disposed on the periphery of the tumbling barrel. The present invention can fully dry the granular drugs and reduce the energy consumption of the ventilation device.

Description

Technical Field

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

[0002] The existing device cannot heat it evenly and the drying technology is too simple, so after people take it out, it cannot be completely dried, resulting in the failure of the medicine to be effective, thereby reducing people's work efficiency, and resulting in reduced medicine efficacy and production capacity. Since the existing device has a small built-in drying space, it cannot hold a large number of items that need to be dried at the same time and people are prone to burns when taking out the dried products, which greatly increases people's working time and work intensity.

[0003] Chinese patent CN216432422U discloses a granular seed drug coating drying device, comprising a base, the upper surface of the base is fixedly connected to the oil heating box, the lower surface of the inner wall of the heating box is fixedly connected to the support rod, the upper surface of the support rod is fixedly connected to the support plate, the left and right side surfaces of the support plate are fixedly connected to the first fixed block, the first fixed block is clamped with a roller through a side groove, one end of the roller is fixedly connected to the output end of the motor through a rotating shaft, the surface of the roller is sleeved with a conveyor belt, the surface of the conveyor belt is fixedly provided with a heating groove, the upper surface and lower surface of the first fixed block are fixedly connected to the second fixed block, the heating box is fixedly connected to the first telescopic rod, the left and right sides of the first telescopic rod are provided with a first slide groove, the first telescopic rod is slidably connected to the square tube through the first slide groove, and the end of the square tube away from the first telescopic rod is fixedly connected to the drying box, the front of the drying box is fixedly connected to the exhaust fan, and the front of the exhaust fan is provided with an exhaust port.

[0004] Although the above scheme can improve the drying efficiency of granular medicines, the granular medicines cannot be turned over during drying. At the same time, when the granular medicines are in the heating tank, the coating on the surface of the granular medicines will stick to the heating tank. In order to maintain the medicinal properties, the existing technology often uses a small amount of spray coating, but it is inevitable that a small number of tablets cannot be completely coated. If a large amount of spray coating is used, the surface of the tablets will be too wet, and the traditional drying method cannot quickly dry the tablets. Summary of the Invention

[0005] In response to the above problems, a granular drug coating equipment and coating method are provided, in which a driving device drives the tumbling barrel and the protruding rod located in the tumbling barrel to rotate, so as to realize the turning over of the granular drug, and the granular drug can be dried more evenly under the action of the ventilation device. At the same time, due to the inclined setting of the tumbling barrel, the granular drug itself can be gradually discharged while being dried, thereby ensuring the output. The through holes provided on the tumbling barrel can not only allow the ventilation device to blow hot air into the tumbling barrel, but also screen out the broken granular drug. The waste collection device collects the damaged granular drug after screening. By providing a sealing plate, it is ensured that when the ventilation device supplies hot air, the hot air will not quickly overflow from the through holes on the tumbling barrel.

[0006] In order to solve the problems of the prior art, a granular medicine coating device is provided, comprising a shell, a drying device and a coating device; the drying device comprises a tumbling barrel, a protruding rod, a driving device, a cleaning device, a ventilation device, a sealing plate and a waste collection device; the tumbling barrel is rotatably arranged in the shell, the tumbling barrel is a tubular structure, the angle between the axis of the tumbling barrel and the horizontal plane is an acute angle, the higher end opening of the tumbling barrel is used for putting in granular medicine, the lower end opening of the tumbling barrel is used for discharging the dried granular medicine, and a through hole is opened on the side wall of the tumbling barrel; a plurality of protruding rods are provided, and the protruding rods are fixed along the axis of the tumbling barrel. It is arranged on the inner wall of the tumbling barrel, and the protruding rods are evenly arranged around the axis of the tumbling barrel; the driving device is arranged at one end of the tumbling barrel, and the driving device is used to drive the tumbling barrel to rotate; the cleaning device is arranged through the tumbling barrel, and the driving device drives the cleaning device to clean the inner wall of the tumbling barrel; the ventilation device is arranged on one side of the tumbling barrel, and the ventilation device can blow hot air into the tumbling barrel; the waste collecting device is arranged at the lower part of the tumbling barrel, and the waste collecting device collects broken granular medicines through the through hole; the sealing plate is arranged on the outer periphery of the tumbling barrel, and the sealing plate allows the hot air supplied by the ventilation device to remain in the tumbling barrel for a longer time.

[0007] Preferably, the driving device includes a rotary driver, a first gear and a gear ring; the rotary driver is arranged on one side of the end of the tumbling barrel along the axis of the tumbling barrel, and the output end of the rotary driver points to the tumbling barrel; the first gear is fixedly arranged on the output end of the rotary driver; the gear ring is fixedly arranged on the end of the tumbling barrel along the axis of the tumbling barrel, and the first gear and the gear ring are engaged with each other.

[0008] Preferably, the cleaning device includes a second gear, an extension rod and a cleaning piece; the second gear is arranged on the side of the first gear close to the axis of the tumbling barrel, and the second gear and the first gear are engaged with each other; the extension rod is fixedly arranged along the axis of the second gear at one end of the second gear close to the tumbling barrel and the extension rod passes through the tumbling barrel; a plurality of cleaning pieces are provided, and the cleaning pieces are evenly arranged on the side wall of the extension rod along the axis of the extension rod.

[0009] Preferably, the ventilation device includes a fan, a condenser, a baffle, an air inlet pipe, a heater and a heat-conducting rod; the air inlet pipe is arranged on one side of the tumbling barrel; the fan is arranged on the end of the air inlet pipe away from the tumbling barrel, and the fan is used to supply heated air into the air inlet pipe; the baffles are arranged in the air inlet pipe in an up and down staggered manner in the horizontal direction; the condenser is connected to the baffles, and the condenser is used to cool the baffles; the heater is arranged on the air inlet pipe on the side of the condenser close to the tumbling barrel; the heat-conducting rod is fixed on the heater and passes through the air inlet pipe.

[0010] Preferably, the drying device also includes an anti-blocking device, which includes an air supply device, a first switch valve, a sliding sleeve, an ejector rod and an identification device; the air supply device is arranged on one side of the tumbling barrel along the axis of the tumbling barrel; a plurality of sliding sleeves are provided, and the sliding sleeves are evenly arranged on the side of the air supply device close to the tumbling barrel along the length direction of the air supply device; the first switch valve is provided on the sliding sleeve; the ejector rod is slidably provided in the sliding sleeve, and the end of the ejector rod away from the air supply device can be inserted into the through hole, and the side wall of the ejector rod is gap-matched with the inner wall of the through hole; the identification device is provided on one side of the air supply device, and the identification device is used to identify the position of the through hole. A controller is provided on one side of the identification device, and the identification device controls the extension and retraction of the ejector rod through the controller.

[0011] Preferably, the air supply device includes an air pump, a first tank body, a second tank body, a connecting pipe and a second switch valve; the first tank body is arranged on one side of the tumbling barrel along the axis of the tumbling barrel; the second tank body is arranged on the side of the first tank body away from the tumbling barrel along the length direction of the first tank body; the air pump is located at one end of the first tank body, and the two ends of the air pump are respectively connected to the first tank body and the second tank body; the connecting pipe is located at the end away from the first tank body where the air pump is arranged, and the two ends of the connecting pipe are respectively connected to the first tank body and the second tank body; the second switch valve is arranged on the connecting pipe.

[0012] Preferably, the identification device includes a protrusion and a trigger rod; there are multiple protrusions, and the protrusions correspond one-to-one to the through holes on the radial cross-section of the tumbling barrel; the trigger rod is arranged on one side of the air supply device, and the protrusion can trigger the trigger rod, and the trigger rod controls the operation of the air supply device through the controller.

[0013] Preferably, the anti-blocking device also includes a protective component, which includes a spring, a slip ring and a slider; the slider is fixedly arranged at the end of the ejector rod located in the sliding sleeve; two slip rings are provided, and the two slip rings are respectively arranged in the sliding sleeves on both sides of the slider, and there are first and second gaps between the two slip rings and the side walls at both ends of the sliding sleeve respectively; two springs are provided, and the two springs are respectively arranged in the first gap and the second gap.

[0014] Preferably, the waste collecting device comprises a collecting plate and a collecting port; the collecting plate is arranged obliquely below the tumbling barrel; and the collecting port is arranged at the lower part of the shell.

[0015] The present invention also relates to a method for coating granular medicines, which comprises the following steps:

[0016] S1. The coating device atomizes and coats the granular medicine. The coated granular medicine is put into the tumbling barrel from the opening at the higher end of the tumbling barrel.

[0017] S2. The driving device is started, and the driving device drives the tumbling barrel and the cleaning device to rotate at the same time. The protruding rod in the tumbling barrel rotates synchronously with the tumbling barrel and causes the granular medicine in the tumbling barrel to roll and turn over. As the granular medicine turns over, it slides down along the tilted direction of the tumbling barrel under the action of its own gravity, and the cleaning device cleans the inner wall of the tumbling barrel;

[0018] S3. The ventilation device supplies air to the tumbling barrel. After the hot air enters the tumbling barrel, it can only be discharged from the openings at both ends of the tumbling barrel and the waste collection device. The dried granular medicine is discharged from the lower position of the tumbling barrel.

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

[0020] The present invention is provided with a tumbling barrel, a protruding rod, a driving device, a cleaning device, a ventilation device, a sealing plate and a waste collecting device. The driving device drives the tumbling barrel and the protruding rod located in the tumbling barrel to rotate, so as to realize the turning over of the granular medicine. Under the action of the ventilation device, the granular medicine can be dried more evenly. At the same time, due to the inclined setting of the tumbling barrel, the granular medicine can be gradually discharged while being dried under the action of the granular medicine itself, thereby ensuring the output. The through holes provided on the tumbling barrel can not only allow the ventilation device to blow hot air into the tumbling barrel, but also screen out the broken granular medicine. The waste collecting device collects the damaged granular medicine after screening. The sealing plate is provided to ensure that when the ventilation device supplies hot air, the hot air will not quickly overflow from the through holes on the tumbling barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of a granular drug coating device.

[0022] Figure 2 It is a side view of a granular drug coating device.

[0023] Figure 3 A three-dimensional diagram of a granular drug coating device with part of the shell removed Figure 1 .

[0024] Figure 4 A three-dimensional diagram of a granular drug coating device with part of the shell removed Figure 2 .

[0025] Figure 5 It is a granular drug coating equipment Figure 4A local enlarged schematic diagram of point A in the middle.

[0026] Figure 6 A three-dimensional diagram of a granular drug coating device with part of the shell removed Figure 3 .

[0027] Figure 7 It is a granular drug coating equipment Figure 6 A partial enlarged schematic diagram of point B in the middle.

[0028] Figure 8 It is a front view of a granular drug coating device with the outer shell removed.

[0029] Figure 9 It is a granular drug coating equipment Figure 8 Schematic cross-sectional view at CC in the middle.

[0030] Figure 10 It is a granular drug coating equipment Figure 9 A local enlarged schematic diagram of point D in the middle.

[0031] Figure 11 This is a 3D diagram of a granular drug coating device with the housing, fan, and air inlet pipe removed. Figure 1 .

[0032] Figure 12 This is a 3D diagram of a granular drug coating device with the housing, fan, and air inlet pipe removed. Figure 2 .

[0033] Figure 13 It is a granular drug coating equipment Figure 12 A partial enlarged schematic diagram of point E in the middle.

[0034] The numbers in the figure are:

[0035] 1-housing; 2-drying device; 21-tumbling barrel; 22-projecting rod; 23-driving device; 231-rotating drive; 232-first gear; 233-gear ring; 24-cleaning device; 241-second gear; 242-extension rod; 243-cleaning member; 25-ventilation device; 251-fan; 252-condenser; 253-blocking plate; 254-air inlet pipe; 255-heater; 256-heat conducting rod; 26-sealing plate; 27-waste collection device Collecting device; 271-collecting plate; 28-anti-blocking device; 281-air supply device; 2811-air pump; 2812-first tank body; 2813-second tank body; 2814-connecting pipe; 2815-second switch valve; 282-first switch valve; 283-sliding sleeve; 284-ejector rod; 285-identification device; 2851-bump; 2852-trigger; 286-protection component; 2861-spring; 2862-slip ring; 2863-slider. DETAILED DESCRIPTION

[0036] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Reference Figure 1-Figure 3 : A granular medicine coating device, comprising a shell 1, a drying device 2 and a coating device; the drying device 2 comprises a tumbling barrel 21, a protruding rod 22, a driving device 23, a cleaning device 24, a ventilation device 25, a sealing plate 26 and a waste collection device 27; the tumbling barrel 21 is rotatably arranged in the shell 1, the tumbling barrel 21 is a tubular structure, the angle between the axis of the tumbling barrel 21 and the horizontal plane is an acute angle, the higher end opening of the tumbling barrel 21 is used to put in granular medicine, and the lower end opening of the tumbling barrel 21 is used to discharge the dried granular medicine, and a through hole is opened on the side wall of the tumbling barrel 21; a plurality of protruding rods 22 are provided, and the protruding rods 22 are fixedly arranged on the inner wall of the tumbling barrel 21 along the axis of the tumbling barrel 21 On the top, the protruding rods 22 are evenly arranged around the axis of the tumbling barrel 21; the driving device 23 is arranged at one end of the tumbling barrel 21, and the driving device 23 is used to drive the tumbling barrel 21 to rotate; the cleaning device 24 is arranged throughout the tumbling barrel 21, and the driving device 23 drives the cleaning device 24 to clean the inner wall of the tumbling barrel 21; the ventilation device 25 is arranged on one side of the tumbling barrel 21, and the ventilation device 25 can blow hot air into the tumbling barrel 21; the waste collecting device 27 is arranged at the lower part of the tumbling barrel 21, and the waste collecting device 27 collects broken granular medicines through the through hole; the sealing plate 26 is arranged on the periphery of the tumbling barrel 21, and the sealing plate 26 allows the hot air supplied by the ventilation device 25 to remain in the tumbling barrel 21 for a longer time.

[0038] The coating device atomizes and coats the granular medicine before feeding. In order to ensure the coating effect, the coating device will increase the atomization amount, but it will cause the surface of the granular medicine to be moist and need to be dried quickly. In this way, the coated granular medicine is put into the opening on the higher side of the tumbling barrel 21, and the driving device 23 is started. The driving device 23 drives the tumbling barrel 21 to flip and can also drive the cleaning device 24 to rotate. The cleaning device 24 runs through the tumbling barrel 21. The cleaning device 24 is located on the upper side of the tumbling barrel 21. In this way, the cleaning device 24 will clean the tumbling barrel 21 only when the inner wall of the tumbling barrel 21 rotates to the highest point, avoiding the situation where the cleaning device 24 and the granular medicine are mixed together. By setting the cleaning device 24, the situation where the granular medicine blocks the through hole is avoided. When the tumbling barrel 21 rotates, the protruding rod 22 located in the tumbling barrel 21 rotates synchronously with the tumbling barrel 21. The protruding rod 22 can drive part of the granular medicine to gradually lift up and unload the granular medicine after reaching the horizontal position, so that the granular medicine is turned over. At the same time, since the tumbling barrel 21 is tilted, under the action of the granular medicine's own gravity, the granular medicine will gradually slide down along the tilt direction of the tumbling barrel 21 while constantly turning over, and will eventually be discharged from the lowest point of the tumbling barrel 21. At the same time, after the granular medicine is put into the tumbling barrel 21, the ventilation device 25 will also be started, and the ventilation device 25 will blow hot air into the tumbling barrel 21. Since the tumbling barrel 21 is provided with a plurality of through holes, when the hot air enters the tumbling barrel 21, since the two ends of the tumbling barrel 21 are open There are multiple through holes on the side wall of the tumbling barrel 21, and hot air will quickly overflow from the through holes. After the sealing plate 26 is set, the sealing plate 26 can block the through holes, and air can only enter the tumbling barrel 21 from the ventilation device, and when the air is discharged, it can only be discharged through the waste collection device 27 and the openings at both ends of the tumbling barrel 21, which greatly reduces the overflow of hot air, allows more hot air to remain in the tumbling barrel 21, and fully dry the granular medicine, reducing the energy consumption of the ventilation device 25.

[0039] Reference Figure 2 and Figure 3 : The driving device 23 includes a rotary driver 231, a first gear 232 and a gear ring 233; the rotary driver 231 is arranged on one side of the end of the tumbling barrel 21 along the axis of the tumbling barrel 21, and the output end of the rotary driver 231 points to the tumbling barrel 21; the first gear 232 is fixedly arranged on the output end of the rotary driver 231; the gear ring 233 is fixedly arranged on the end of the tumbling barrel 21 along the axis of the tumbling barrel 21, and the first gear 232 and the gear ring 233 are engaged with each other.

[0040] After the rotary driver 231 is started, the rotary driver 231 drives the first gear 232 to rotate. Since the first gear 232 and the gear ring 233 are engaged with each other, after the first gear 232 rotates, the gear ring 233 also rotates, and the tumbling barrel 21 fixed to the gear ring 233 also rotates.

[0041] Reference Figure 2 and Figure 5 : The cleaning device 24 includes a second gear 241, an extension rod 242 and a cleaning piece 243; the second gear 241 is arranged on the side of the first gear 232 close to the axis of the tumbling barrel 21, and the second gear 241 and the first gear 232 are engaged with each other; the extension rod 242 is fixedly arranged along the axis of the second gear 241 at one end of the second gear 241 close to the tumbling barrel 21 and the extension rod 242 passes through the tumbling barrel 21; a plurality of cleaning pieces 243 are provided, and the cleaning pieces 243 are evenly arranged on the side wall of the extension rod 242 along the axis of the extension rod 242.

[0042] The second gear 241 is engaged with the first gear 232. When the first gear 232 rotates, the second gear 241 will also rotate, and the second gear 241 drives the extension rod 242 to rotate synchronously. Since the extension rod 242 is provided with a cleaning member 243, and the cleaning member 243 is always in contact with the upper inner wall of the tumbling barrel 21, the inner wall of the tumbling barrel 21 can be cleaned. It is worth noting that since the diameter of the second gear 241 is much smaller than the diameter of the gear ring 233, although the second gear 241 and the gear ring 233 are both engaged with the first gear 232, the angular velocity of the second gear 241 and the gear ring 233 is the same but the linear velocity is different, so that the cleaning device 24 can clean the tumbling barrel 21.

[0043] Reference Figure 1 、 Figure 4 、 Figure 6 、 Figure 8 and Figure 11 : The ventilation device 25 includes a fan 251, a condenser 252, a baffle 253, an air inlet pipe 254, a heater 255 and a heat-conducting rod 256; the air inlet pipe 254 is arranged on one side of the tumbling barrel 21; the fan 251 is arranged on the end of the air inlet pipe 254 away from the tumbling barrel 21, and the fan 251 is used to supply heated air into the air inlet pipe 254; the baffles 253 are arranged in the air inlet pipe 254 in an up and down staggered manner in the horizontal direction; the condenser 252 is connected to the baffle 253, and the condenser 252 is used to cool the baffle 253; the heater 255 is arranged on the air inlet pipe 254 on the side of the condenser 252 close to the tumbling barrel 21; the heat-conducting rod 256 is fixedly arranged on the heater 255 and passes through the air inlet pipe 254.

[0044] After the fan 251 is started, the fan 251 supplies the heated air to the air inlet pipe 254. Before the hot air enters the tumbling drum 21, it passes through the baffle plate 253. Since the baffle plates 253 are staggered up and down, the hot air originally flowing horizontally in the air inlet pipe 254 will hit the baffle plate 253 and be transformed into a vertical S-shaped flow under the guidance of the baffle plate 253. Since the condenser 252 cools the baffle plate 253, moisture in the bent hot air will condense on the baffle plate 253, thus achieving the dehumidification effect. More and more condensed water droplets will drip onto the bottom of the air inlet pipe 254. The bottom of the air inlet pipe 254 is provided with a drainage hole, so that the condensed water can be discharged. After drying, the temperature of the air is reduced. At this time, the air with reduced temperature passes through the heat conducting rod 256, which heats up the reduced air for a second time to ensure that the air blown into the tumbling drum 21 has sufficient heat, thereby achieving a better drying effect.

[0045] Reference Figures 8-10 and Figure 12 : The drying device 2 also includes an anti-blocking device 28, which includes an air supply device 281, a first switch valve 282, a sleeve 283, an ejector rod 284 and an identification device 285; the air supply device 281 is arranged on one side of the tumbling barrel 21 along the axis of the tumbling barrel 21; a plurality of sleeves 283 are provided, and the sleeves 283 are evenly arranged on the side of the air supply device 281 close to the tumbling barrel 21 along the length direction of the air supply device 281; the first switch valve 282 is provided on the sleeve 283; the ejector rod 284 is slidably arranged in the sleeve 283, and the end of the ejector rod 284 away from the air supply device 281 can be inserted into the through hole, and the side wall of the ejector rod 284 is clearance-matched with the inner wall of the through hole; the identification device 285 is provided on one side of the air supply device 281, and the identification device 285 is used to identify the position of the through hole. A controller is provided on one side of the identification device 285, and the identification device 285 controls the extension and retraction of the ejector rod 284 through the controller.

[0046] Since the cleaning capacity of the cleaning device 24 is limited, if there are stubborn granular drugs blocking the through hole, the cleaning device 24 cannot clean it, which will lead to poor ventilation after a long time, thereby reducing the drying effect. When the tumbling barrel 21 is tumbling, the identification device 285 will identify the position of the through hole on the tumbling barrel 21, thereby ensuring that the extended ejector rod 284 can accurately probe into the through hole. The air supply device 281 is in a pressurized state before air supply. When the identification device 285 identifies it, the first When a switch valve 282 is opened, pressurized air flows into the sliding sleeve 283 and pushes out the ejection rod 284. Since the tumbling barrel 21 is always in a rotating state, the ejection rod 284 needs to match the gap between the through hole. Otherwise, the ejection rod 284 will be broken by the through hole after being inserted into the through hole. The gap between the ejection rod 284 and the through hole allows the ejection rod 284 to retract. When the ejection rod 284 is ejected, the air supply device 281 switches to a negative pressure state, causing the ejection rod 284 to retract quickly, and the cycle repeats.

[0047] Reference Figure 7 and Figure 8 : The air supply device 281 includes an air pump 2811, a first tank body 2812, a second tank body 2813, a connecting pipe 2814 and a second switch valve 2815; the first tank body 2812 is arranged on one side of the tumbling barrel 21 along the axis of the tumbling barrel 21; the second tank body 2813 is arranged on the side of the first tank body 2812 away from the tumbling barrel 21 along the length direction of the first tank body 2812; the air pump 2811 is located at one end of the first tank body 2812, and the two ends of the air pump 2811 are respectively connected to the first tank body 2812 and the second tank body 2813; the connecting pipe 2814 is located at the end away from the first tank body 2812 where the air pump 2811 is arranged, and the two ends of the connecting pipe 2814 are respectively connected to the first tank body 2812 and the second tank body 2813; the second switch valve 2815 is arranged on the connecting pipe 2814.

[0048] Before the ejection rod 284 is ejected, the air pump 2811 draws the air in the second tank body 2813 into the first tank body 2812. At this time, the first switch valve 282 is in a closed state, and the air pressure in the first tank body 2812 is in a high state. When the identification device 285 identifies the position of the through hole, the first switch valve 282 is quickly opened, and the pressurized air in the first tank body 2812 flows into the sliding sleeve 283 and ejects the ejection rod 284. At this time, the second tank body 2813 is in a negative pressure state. When the ejection rod 284 needs to be retracted, It takes a long time to pump air by relying solely on the air pump 2811. At this time, the second switch valve 2815 needs to be opened, and the air in the first tank body 2812 is sucked into the second tank body 2813, thereby retracting the extended ejector rod 284. When the above operations are completed, the first switch valve 282 and the second switch valve 2815 are closed at the same time, and the air pump 2811 draws the air in the second tank body 2813 into the first tank body 2812. The air pressure in the first tank body 2812 continues to rise, and the air pressure in the second tank body 2813 continues to decrease.

[0049] Reference Figure 12 and Figure 13 : The identification device 285 includes a protrusion 2851 and a trigger rod; there are multiple protrusions 2851, and the protrusions 2851 correspond one-to-one to the through holes on the radial cross-section of the tumbling barrel 21; the trigger rod is arranged on one side of the air supply device 281, and the protrusion 2851 can trigger the trigger rod, and the trigger rod controls the operation of the air supply device 281 through the controller.

[0050] When the tumbling barrel 21 rotates, the protrusion 2851 rotates synchronously with the tumbling barrel 21 . After the rotating protrusion 2851 contacts the trigger rod, the trigger rod activates the air supply device 281 through the controller.

[0051] Reference Figure 9 and Figure 10 : The anti-blocking device 28 also includes a protection component 286, which includes a spring 2861, a slip ring 2862 and a slider 2863; the slider 2863 is fixedly arranged at the end of the ejection rod 284 located in the sliding sleeve 283; there are two slip rings 2862, which are respectively arranged in the sliding sleeves 283 on both sides of the slider 2863, and there are first and second gaps between the two slip rings 2862 and the side walls of the two ends of the sliding sleeve 283; there are two springs 2861, which are respectively arranged in the first gap and the second gap.

[0052] When the air supply device 281 is started, the pressurized air pushes out the ejector rod 284. Under the deceleration of the spring 2861, the slider 2863 is prevented from directly hitting the sleeve 283. Similarly, when the air pressure is released, the ejector rod 284 retracts. Due to the rapid retraction of the ejector rod 284, the slider 2863 will also hit the sleeve 283. After the slip ring 2862 and the spring 2861 are set, it is guaranteed that the sleeve 283 will not be damaged.

[0053] Reference Figure 3 and Figure 4 : The waste collecting device 27 includes a collecting plate 271 and a collecting port; the collecting plate 271 is tilted and arranged below the tumbling barrel 21; the collecting port is arranged at the lower portion of the housing 1.

[0054] The crushed granular medicine falls onto the collecting plate 271 through the through hole. Since the collecting plate 271 is tilted, under the action of gravity, the crushed granular medicine is discharged through the collecting port along the tilt direction of the collecting plate 271.

[0055] Reference Figures 1-13 The present invention also relates to a method for coating granular drugs, the specific steps of which are as follows:

[0056] S1, the coating device atomizes and coats the granular medicine, and the coated granular medicine is put into the tumbling barrel 21 from the opening at the higher end of the tumbling barrel 21;

[0057] S2. The driving device 23 is started, and the driving device 23 drives the tumbling barrel 21 and the cleaning device 24 to rotate simultaneously. The protruding rod 22 in the tumbling barrel 21 rotates synchronously with the tumbling barrel 21 and causes the granular medicine in the tumbling barrel 21 to roll and turn over. As the granular medicine turns over, it slides down along the inclined direction of the tumbling barrel 21 under the action of its own gravity. The cleaning device 24 cleans the inner wall of the tumbling barrel 21.

[0058] S3, the ventilation device 25 supplies air to the tumbling barrel 21. After the hot air enters the tumbling barrel 21, it can only be discharged from the openings at both ends of the tumbling barrel 21 and the waste collection device 27. The dried granular medicine is discharged from the lower position of the tumbling barrel 21.

[0059] The above embodiments merely represent one or several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A granular drug coating device, comprising a shell (1), a drying device (2) and a coating device; It is characterized by: The drying device (2) includes a tumbling barrel (21), a protruding rod (22), a driving device (23), a cleaning device (24), a ventilation device (25), a sealing plate (26) and a waste collection device (27); The tumbling barrel (21) is rotatably arranged in the housing (1). The tumbling barrel (21) is a tubular structure. The angle between the axis of the tumbling barrel (21) and the horizontal plane is an acute angle. The opening at the higher end of the tumbling barrel (21) is used for putting in granular medicine. The opening at the lower end of the tumbling barrel (21) is used for discharging the dried granular medicine. A through hole is formed on the side wall of the tumbling barrel (21). A plurality of protruding rods (22) are provided, and the protruding rods (22) are fixedly provided on the inner wall of the tumbling barrel (21) along the axis of the tumbling barrel (21), and the protruding rods (22) are evenly arranged around the axis of the tumbling barrel (21); The driving device (23) is arranged at one end of the tumbling barrel (21), and the driving device (23) is used to drive the tumbling barrel (21) to rotate; The cleaning device (24) is disposed throughout the tumbling barrel (21), and the driving device (23) drives the cleaning device (24) to clean the inner wall of the tumbling barrel (21); The ventilation device (25) is arranged on one side of the tumbling barrel (21), and the ventilation device (25) can blow hot air into the tumbling barrel (21); The waste collecting device (27) is arranged at the lower part of the tumbling barrel (21), and the waste collecting device (27) collects the broken granular medicine through the through hole; The sealing plate (26) is arranged on the periphery of the tumbling barrel (21), and the sealing plate (26) enables the hot air supplied by the ventilation device (25) to remain in the tumbling barrel (21) for a longer period of time; The drying device (2) further includes an anti-blocking device (28), and the anti-blocking device (28) includes an air supply device (281), a first switch valve (282), a sliding sleeve (283), an ejector rod (284), and an identification device (285); The air supply device (281) is arranged on one side of the tumbling barrel (21) along the axis of the tumbling barrel (21); A plurality of sliding sleeves (283) are provided, and the sliding sleeves (283) are evenly arranged along the length direction of the air supply device (281) on a side of the air supply device (281) close to the tumbling barrel (21); The first switch valve (282) is arranged on the sliding sleeve (283); The ejector rod (284) is slidably arranged in the sliding sleeve (283), and the end of the ejector rod (284) away from the air supply device (281) can be inserted into the through hole, and the side wall of the ejector rod (284) is clearance-matched with the inner wall of the through hole; An identification device (285) is provided on one side of the air supply device (281), and the identification device (285) is used to identify the position of the through hole. A controller is provided on one side of the identification device (285), and the identification device (285) controls the extension and retraction of the ejection rod (284) through the controller. The identification device (285) includes a protrusion (2851) and a trigger rod; A plurality of protrusions (2851) are provided, and the protrusions (2851) correspond one to one with the through holes on the radial cross section of the tumbling barrel (21); The trigger rod is arranged on one side of the air supply device (281), and the protrusion (2851) can trigger the trigger rod, and the trigger rod controls the operation of the air supply device (281) through the controller.

2. A granular drug coating device according to claim 1, characterized in that: The driving device (23) includes a rotary driver (231), a first gear (232) and a gear ring (233); The rotary driver (231) is arranged on one side of the end of the tumbling barrel (21) along the axis of the tumbling barrel (21), and the output end of the rotary driver (231) points toward the tumbling barrel (21); The first gear (232) is fixedly arranged on the output end of the rotary driver (231); The gear ring (233) is fixedly arranged at the end of the tumbling barrel (21) along the axis of the tumbling barrel (21), and the first gear (232) and the gear ring (233) are meshed with each other.

3. A granular drug coating device according to claim 2, characterized in that: The cleaning device (24) includes a second gear (241), an extension rod (242), and a cleaning member (243); The second gear (241) is arranged on a side of the first gear (232) close to the axis of the tumbling barrel (21), and the second gear (241) and the first gear (232) are meshed with each other; The extension rod (242) is fixedly arranged along the axis of the second gear (241) at one end of the second gear (241) close to the tumbling barrel (21), and the extension rod (242) passes through the tumbling barrel (21); A plurality of cleaning members (243) are provided, and the cleaning members (243) are evenly arranged on the side wall of the extension rod (242) along the axis of the extension rod (242).

4. A granular drug coating device according to claim 1, characterized in that: The ventilation device (25) includes a fan (251), a condenser (252), a baffle (253), an air inlet pipe (254), a heater (255) and a heat conducting rod (256); The air inlet pipe (254) is provided on one side of the tumbling barrel (21); The fan (251) is arranged on one end of the air inlet pipe (254) away from the tumbling barrel (21), and the fan (251) is used to supply heated air into the air inlet pipe (254); The blocking plates (253) are arranged in an up-and-down staggered manner in the horizontal direction inside the air inlet pipe (254); The condenser (252) is connected to the baffle plate (253), and the condenser (252) is used to cool the baffle plate (253); The heater (255) is arranged on the air inlet pipe (254) on the side of the condenser (252) close to the tumbling barrel (21); The heat conducting rod (256) is fixedly mounted on the heater (255) and passes through the air inlet pipe (254).

5. The granular drug coating device according to claim 1, characterized in that: The air supply device (281) includes an air pump (2811), a first tank body (2812), a second tank body (2813), a connecting pipe (2814), and a second switch valve (2815); The first tank body (2812) is arranged on one side of the tumbling barrel (21) along the axis of the tumbling barrel (21); The second tank body (2813) is arranged along the length direction of the first tank body (2812) on a side of the first tank body (2812) away from the tumbling barrel (21); The air pump (2811) is located at one end of the first tank body (2812), and the two ends of the air pump (2811) are respectively connected to the first tank body (2812) and the second tank body (2813); The connecting pipe (2814) is located at one end of the first tank body (2812) where the air pump (2811) is provided, and both ends of the connecting pipe (2814) are respectively connected to the first tank body (2812) and the second tank body (2813); The second switch valve (2815) is provided on the connecting pipe (2814).

6. The granular drug coating device according to claim 1, characterized in that: The anti-blocking device (28) further includes a protection assembly (286), and the protection assembly (286) includes a spring (2861), a slip ring (2862), and a slider (2863); The slider (2863) is fixedly arranged at the end of the ejector rod (284) located inside the sliding sleeve (283); Two slip rings (2862) are provided. The two slip rings (2862) are respectively provided in the sliding sleeves (283) on both sides of the slider (2863). A first gap and a second gap are respectively provided between the side walls of the two slip rings (2862) and the two ends of the sliding sleeve (283); Two springs (2861) are provided, and the two springs (2861) are respectively provided in the first gap and the second gap.

7. The granular drug coating device according to claim 1, characterized in that: The waste collection device (27) includes a collection plate (271) and a collection port; The collecting plate (271) is tilted and arranged below the tumbling barrel (21); The collecting port is arranged at the lower part of the housing (1).

8. A method for coating granular drugs, using a granular drug coating device according to any one of claims 1 to 7, characterized in that: The specific steps are as follows: S1, the coating device atomizes and coats the granular medicine, and the coated granular medicine is put into the tumbling barrel (21) from the opening at the higher end of the tumbling barrel (21); S2, the driving device (23) is started, and the driving device (23) drives the tumbling barrel (21) and the cleaning device (24) to rotate at the same time. The protruding rod (22) in the tumbling barrel (21) rotates synchronously with the tumbling barrel (21) and causes the granular medicine in the tumbling barrel (21) to roll and turn over. When the granular medicine turns over, it slides down along the tilt direction of the tumbling barrel (21) under the action of its own gravity. The cleaning device (24) cleans the inner wall of the tumbling barrel (21); S3, the ventilation device (25) supplies air to the tumbling barrel (21). After the hot air enters the tumbling barrel (21), it can only be discharged from the openings at both ends of the tumbling barrel (21) and the waste collection device (27). The dried granular medicine is discharged from the lower position of the tumbling barrel (21).

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