Bag-packing equipment in an automatic granule bag packaging line

Abstract

This invention relates to the field of packaging technology, specifically to bagging equipment in an automatic granule bag packaging line. Its feeding mechanism includes a conical barrel with a feeding pipe connected to the bottom and a blowing assembly connected to an air pump at the top. The conical barrel has an outer cylinder and an inner cylinder coaxially fitted together, with a gap channel formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder. The feeding pipe includes an outer pipe fixedly connected to the bottom of the conical barrel and an inner pipe rotatably fitted onto the inner wall of the outer pipe. The upper end of the inner pipe is connected to the lower end of the inner cylinder, used to receive and transport granules output by a metering mechanism. The blowing assembly simultaneously delivers two airflows: one airflow directly sweeps the inner cylinder and the inner wall of the inner pipe, promptly removing granules adsorbed by electrostatics or bound by humidity; the other airflow drives the inner pipe to periodically rotate relative to the outer pipe, generating vibrations that directly break the bridging structure formed by the granules in the narrow feeding channel.

Description

Technical Field

[0001] This invention relates to the field of packaging technology, and more specifically, to bagging equipment in an automated granule bag packaging line. Background Technology

[0002] In the field of automated packaging for granule products, commonly used bagging equipment in existing technologies mainly includes vertical bag-making and filling packaging machines, pre-filled bag packaging machines, and multi-row high-speed packaging machines. During operation, the roll film is folded by the forming device to form a cylindrical bag blank, which is then moved downward synchronously by the traction mechanism; after the metering unit quantitatively measures the granules, they are filled into the bag blank through the feeding pipe; subsequently, the longitudinal and transverse sealing mechanisms complete the heat sealing, and then the cutting component divides it into individual finished bags. Some equipment also integrates auxiliary functions such as coding and detection to realize continuous automation of the packaging process.

[0003] For the packaging of granule sachets of medical drugs, the industry typically uses small-sized vertical bag-making and filling packaging machines as the core equipment. This type of equipment is adapted to the stringent requirements of the pharmaceutical field for packaging precision, sealing and hygiene. It can achieve the metering of small doses of granules and is compatible with packaging materials such as pharmaceutical composite films, and can complete the forming and sealing of compliant bag types such as three-side seal and four-side seal.

[0004] However, existing small-sized vertical bag-making and filling packaging machines often encounter problems when processing pharmaceutical granules such as traditional Chinese medicine granules. This is because the diameter of the feeding tube for small bags is typically designed to be quite narrow (generally only 15-20mm). Pharmaceutical granules are easily affected by static electricity and environmental humidity, and are prone to adhering to the inner wall of the feeding tube due to static electricity and humidity. In severe cases, this can even lead to granule bridging, causing blockage of the feeding channel. This not only causes the actual filling amount of granules to deviate from the preset value, resulting in excessive differences in drug content and affecting the consistency of drug quality, but also requires frequent manual intervention from operators to clean the feeding tube, reducing production efficiency.

[0005] Therefore, there is an urgent need for bagging equipment in automatic granule bag packaging lines to solve the above problems. Summary of the Invention

[0006] This invention provides a bagging device in an automatic granule bag packaging line. By designing the feeding mechanism as a double-layered nested conical barrel with a rotatable inner tube structure, and coordinating with a blowing assembly to synchronously deliver airflow into the gap channel between the conical barrel and the inner wall of the inner cylinder, one airflow path sweeps the inner cylinder and inner tube walls to clean adhering particles, while the other airflow path drives the inner tube to periodically rotate relative to the outer tube, generating vibrations to promote particle detachment. This solves the problems mentioned in the background art, namely:

[0007] The feed pipe diameter of existing small-sized vertical bag making and filling packaging machines is narrow, and medicinal granules such as traditional Chinese medicine powder are prone to problems such as adhesion to the pipe wall and bridging blockage due to static electricity and humidity.

[0008] To achieve the above objectives, the bagging equipment in the automatic granule bag packaging line includes a feeding mechanism, a metering mechanism, a longitudinal sealing and traction mechanism, a sealing and cutting mechanism, and a discharging mechanism. The feeding mechanism is located above the metering mechanism, and the output port of the metering mechanism is connected to the inlet of the discharging mechanism. The longitudinal sealing and traction mechanism is located adjacent to the side wall of the discharging mechanism, and the sealing and cutting mechanism is located below the discharging mechanism. The discharging mechanism includes a conical barrel, with a discharging pipe connected to the bottom of the conical barrel and a blowing assembly configured at the top of the conical barrel. The blowing assembly is connected to an air pump.

[0009] The conical barrel has an outer cylinder and an inner cylinder coaxially sleeved together, and a gap channel is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder. The feeding pipe includes an outer pipe fixedly connected to the bottom end of the conical barrel, and an inner pipe rotatably sleeved on the inner wall of the outer pipe.

[0010] The upper port of the inner tube is connected to the lower port of the inner cylinder to receive and transport particles output by the metering mechanism. The blowing assembly is configured to guide the airflow to both the gap channel and the inner wall area of ​​the inner cylinder.

[0011] The airflow flowing towards the inner wall of the inner cylinder is used to sweep away the particles attached to its surface and the inner wall of the inner tube. The airflow flowing towards the gap channel is guided to the top of the inner tube and drives the inner tube to rotate periodically relative to the outer tube, so that the inner tube vibrates and promotes the downward shedding of particles from its inner wall.

[0012] In the above technical solution, the feeding mechanism is designed as a double-layered nested conical barrel and a rotatable inner tube structure, and the blowing component simultaneously delivers airflow to the gap channel and the inner wall of the inner cylinder. This is because the feeding pipe of the small-sized vertical bag making and filling packaging machine is narrow, and pharmaceutical particles are easily affected by static electricity and humidity, adhering to the pipe wall and causing bridging and blockage. The gap channel formed by the double-layered conical barrel can accurately guide one airflow to the top of the inner tube. With the rotatable design of the inner tube, the airflow can drive the inner tube to rotate periodically to generate vibration, breaking the particle adhesion and bridging structure. At the same time, another airflow directly blows the inner cylinder and the inner wall of the inner tube, accurately cleaning the adhering particles. The two effects work together to reduce particle adhesion, avoid bridging and blockage, eliminate the need for manual intervention in cleaning, and ensure smooth particle falling, ensuring accurate filling and consistent quality.

[0013] Based on this, the conical barrel also includes a base, which is fixedly connected between the bottom of the outer cylinder and the inner cylinder, and the base is provided with multiple ventilation holes.

[0014] The bottom of the base is fixedly connected to the feed tube, the bottom of the base is fixedly connected to the top of the outer tube, and the base is movably connected to the top of the inner tube, so as to ensure that the inner tube is not affected when it rotates on the inner wall of the outer tube.

[0015] In the above technical solution, the feeding tube also includes a collar, which is fixedly connected to the inner wall of the outer tube. The outer wall of the inner tube is provided with a sliding groove, and the collar is movably engaged in the sliding groove. The collar is used to support and limit the rotation of the inner tube.

[0016] Preferably, the outer wall of the inner tube is provided with multiple air ducts near the top, and the air ducts are designed as curved channels.

[0017] The two air ducts are symmetrically distributed and form a group, arrayed on the outer wall of the inner tube.

[0018] One of the two symmetrical air ducts has its top aligned with the vent. When the inner tube rotates, it will cause the other of the two symmetrical air ducts to align with the vent.

[0019] In another technical solution, the blowing assembly includes an annular air duct, which is fixedly connected to the top of the outer cylinder. The top of the annular air duct is provided with a pipe, and the end of the pipe is provided with an air pump.

[0020] Preferably, the annular duct has the same shape as the top of the outer cylinder, and the hollow space at the bottom of the annular duct is distributed between the top of the inner cylinder and the gap channel.

[0021] Preferably, the pipe is composed of multiple short pipes, which are arrayed at the top of the outer cylinder and interconnected, for uniformly distributing the gas from the air pump inside the annular duct.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] Through the structural design of a double-layered nested conical barrel and a rotatable inner tube, and in conjunction with the blowing component, two airflows are delivered simultaneously. One airflow directly blows and sweeps the inner wall of the inner cylinder and inner tube, promptly removing particles adsorbed by electrostatics and adhering to moisture. The other airflow drives the inner tube to rotate periodically relative to the outer tube and generate vibration, directly breaking the bridging structure formed by particles in the narrow feeding channel. This achieves the dual effect of blowing and vibration, reducing the problems of pharmaceutical particles adhering to the tube wall and bridging blockage, and ensuring smooth particle feeding. Attached Figure Description

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

[0025] Figure 2 This is a schematic diagram of the material feeding and packaging steps of the packaging machine according to the present invention;

[0026] Figure 3 This is a schematic diagram of the feeding mechanism of the present invention;

[0027] Figure 4 This is a schematic diagram of the conical barrel structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the airflow path of the blowing assembly of the present invention;

[0029] Figure 6 This is an exploded view of the internal structure of the feed tube of the present invention;

[0030] Figure 7 This is a schematic diagram of the duct tilt direction of the present invention;

[0031] Figure 8 This is a schematic diagram showing the alternating overlap of the air duct and the ventilation opening of the present invention.

[0032] The meanings of the labels in the diagram are as follows:

[0033] 1. Feeding mechanism; 2. Metering mechanism; 3. Longitudinal sealing and traction mechanism; 4. Sealing and cutting mechanism;

[0034] 5. Feeding mechanism;

[0035] 51. Conical barrel; 510. Outer cylinder; 511. Inner cylinder; 512. Base; 513. Ventilation opening;

[0036] 52. Feed pipe; 520. Outer pipe; 521. Collar; 522. Inner pipe; 523. Air duct;

[0037] 53. Blowing assembly; 530. Circulating duct; 531. Pipeline. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Currently, existing small-sized vertical bag-making and filling packaging machines have narrow feed pipes (52), which makes pharmaceutical granules susceptible to static electricity and humidity, causing them to adhere to the pipe walls and become clogged. This invention provides a bagging device for an automatic granule bag packaging line. See [link to relevant documentation]. Figures 1-2 As shown, the device includes a feeding mechanism 1, a metering mechanism 2, a longitudinal sealing and traction mechanism 3, a sealing and cutting mechanism 4, and a discharging mechanism 5. The feeding mechanism 1 is located above the metering mechanism 2, and the output port of the metering mechanism 2 is connected to the inlet of the discharging mechanism 5. The longitudinal sealing and traction mechanism 3 is located adjacent to the side wall of the discharging mechanism 5, and the sealing and cutting mechanism 4 is located below the discharging mechanism 5. Figure 3 As shown, the feeding mechanism 5 includes a conical barrel 51, a feeding pipe 52 connected to the bottom of the conical barrel 51, and a blowing assembly 53 configured on the top of the conical barrel 51, which is connected to an air pump.

[0040] During operation, the feeding mechanism 1 conveys the medicinal granules to the metering mechanism 2. After being quantified by the metering mechanism 2, the granules are conveyed to the unloading mechanism 5. The longitudinal sealing and traction mechanism 3 drives the film roll to form a bag blank and moves it down synchronously to receive the granules conveyed by the unloading mechanism 5. Finally, the sealing and cutting mechanism 4 completes the sealing and cutting of the bag blank to form an independent small bag finished product.

[0041] Among them, the blowing component 53 in the feeding mechanism 5 is connected to the air pump and continuously delivers airflow. The outer cylinder 510 and inner cylinder 511 of the double-layer nested conical barrel 51 form a gap channel, so that the airflow output by the blowing component 53 is divided into two paths that act synchronously. One path of airflow acts directly on the inner wall of the inner cylinder 511 and the inner wall of the inner tube 522 connected thereto, blowing away the medicinal particles that are attached to the tube wall due to electrostatic adsorption and humidity adhesion, thus avoiding the accumulation of particle residue.

[0042] Another airflow is guided to the top of the inner tube 522 through the gap channel, driving the inner tube 522, which is rotatably sleeved on the inner wall of the outer tube 520, to rotate periodically. This causes the inner tube 522 to vibrate continuously, breaking the bridging structure formed by the pharmaceutical granules in the narrow feeding channel and promoting the smooth falling of the granules. Through the coordinated action of the two airflows, a dual anti-sticking effect of purging and vibration is achieved, ensuring that the metered granules can fall completely and smoothly into the bag blank below.

[0043] When implementing, refer to Figure 4 As shown, the blowing assembly 53 includes an annular air duct 530, which is fixedly connected to the top of the outer cylinder 510. The top of the annular air duct 530 is provided with a pipe 531, and the end of the pipe 531 is provided with an air pump.

[0044] like Figure 5 As shown, during operation, the air pump continuously outputs airflow after starting. The airflow first enters the pipe 531 connected to the end of the air pump. Since the pipe 531 is composed of multiple short pipes, and each short pipe array is distributed on the top of the outer cylinder 510 and interconnected, the airflow will be diverted through multiple sets of short pipes after entering the pipe 531, avoiding local airflow concentration and ensuring that the airflow can be evenly distributed into the annular duct 530 fixedly connected to the top of the outer cylinder 510.

[0045] Furthermore, because the overall shape of the ring duct 530 matches the top of the outer cylinder 510, and its bottom hollow space is precisely distributed between the top of the inner cylinder 511 and the gap channel, the airflow evenly distributed by the ring duct 530 can naturally split into two paths. One path passes through the hollow area at the bottom of the ring duct 530 corresponding to the inner cylinder 511, acting on the inner wall of the inner cylinder 511 and the inner wall of the inner tube 522 connected thereto. The other path passes through the hollow area corresponding to the gap channel and enters the gap channel formed by the outer cylinder 510 and the inner cylinder 511.

[0046] In this embodiment, see Figure 4 As shown, the conical barrel 51 adopts a double-layer structure with the outer cylinder 510 and the inner cylinder 511 coaxially fitted, forming a sealed gap channel between the two. By fixing the base 512 to the bottom of the outer cylinder 510 and the inner cylinder 511, the double-layer barrel body is stably assembled. Furthermore, the multiple ventilation holes 513 opened inside provide a guide outlet for the airflow in the gap channel.

[0047] Furthermore, the bottom of the base 512 is fixedly connected to the outer tube 520 of the feed tube 52, while it is movably connected to the top of the inner tube 522, ensuring that while the outer tube 520 remains fixed, the inner tube 522 can rotate freely without being restricted by the base 512.

[0048] Based on this, refer to Figure 6 As shown, the outer tube 520 of the feeding tube 52 is fixed to the bottom of the conical barrel 51, and the inner tube 522 is rotatably sleeved on the inner wall of the outer tube 520. The collar 521 fixed on the inner wall of the outer tube 520 is movably engaged in the sliding groove on the outer wall of the inner tube 522. The collar 521 provides support for the inner tube 522 and prevents the inner tube 522 from shifting axially during rotation. Through the sliding fit with the sliding groove, the circumferential rotation of the inner tube 522 is not affected, ensuring the smoothness and stability of the rotation process of the inner tube 522.

[0049] In addition, multiple air ducts 523 are provided on the outer wall of the inner tube 522 near the top. The air ducts 523 are designed as curved channels, and two air ducts 523 are symmetrically distributed to form a group, arranged in an array along the outer wall of the inner tube 522. The core function of this symmetrical distribution design is to keep the torque of the airflow acting on the inner tube 522 balanced, avoid the inner tube 522 from rotating off-center or getting stuck due to the force on a single air duct 523, and at the same time ensure that the inner tube 522 can achieve a smooth periodic reciprocating rotation under the drive of the airflow, rather than a unidirectional continuous rotation, thereby forming a uniform and stable shaking effect, effectively breaking the particle bridging structure.

[0050] For details, see Figure 7 As shown, during operation, the airflow delivered by the blowing assembly 53 flows downward through the gap channel and is precisely discharged through the vent 513 on the base 512. In the initial state, the top of one of the two symmetrical air channels 523 is aligned with the vent 513. At this time, the airflow in the gap channel directly enters the aligned curved air channel 523 through the vent 513. Since the air channel 523 is a curved structure, the airflow will generate a thrust on the inner wall of the air channel 523 along the tangential direction of the inner tube 522 when it flows in the air channel 523. This thrust forms a torque that drives the inner tube 522 to rotate, causing the inner tube 522 to rotate along the mating direction of the collar 521 and the slide groove.

[0051] As the inner tube 522 rotates, refer to Figure 8As shown, the air duct 523, which was originally aligned with the vent 513, gradually deviates from the vent 513, while the other air duct 523, which is symmetrical to it, gradually approaches and eventually aligns with the vent 513 during the rotation. At this time, the airflow switches from the vent 513 to the symmetrical air duct 523. Under the guidance of the curved air duct 523, a tangential thrust is generated in the opposite direction to the previous one, forming a reverse torque.

[0052] Under the action of this reverse torque, the rotation direction of the inner tube 522 changes and begins to rotate in the opposite direction. When the inner tube 522 rotates to near the initial position, the two air ducts 523 complete the alignment switch with the vent 513 again, and so on in a cycle. This achieves the periodic reciprocating rotation of the inner tube 522, causing the inner tube 522 to produce uniform and continuous vibration, so as to break the particle bridging and promote the particle shedding.

[0053] In the above technical solution, the working principle of the air pump is as known in the prior art. It is achieved by driving the internal piston, impeller or rotor to reciprocate or rotate through the motor, so that the pump body cavity forms a periodic volume change or air pressure difference, thereby drawing in outside air into the pump body. After compression, it forms an airflow with a certain pressure, and then the compressed airflow is stably output to the blowing component 53 through the pipe 531, providing a continuous and stable power source for airflow purging and driving the inner tube 522. Its specific structure and working details are conventional technical means in this field and will not be described in detail here.

[0054] It should be noted that the accompanying drawings of this invention are only schematic diagrams of the structure, used to clearly show the assembly relationship and working principle of each component, and are not intended to limit the actual size and proportion. The size and structural proportion of each component in the drawings can be adaptively adjusted according to actual application requirements (such as small bag packaging specifications, particle size, equipment installation space, etc.). All reasonable modifications and optimizations made to the dimensions and proportions of the drawings based on the core concept of this invention are within the protection scope of this invention.

[0055] Working principle:

[0056] After the equipment is started, the feeding mechanism 1 transports the pharmaceutical granules to the metering mechanism 2. After the metering mechanism 2 completes the quantitative processing of the granules, it accurately transports the granules to the unloading mechanism 5. At the same time, the longitudinal sealing and traction mechanism 3 drives the film rolling to form a cylindrical bag blank and continuously moves downward to connect with the discharge end of the unloading mechanism 5, ready to receive the granules.

[0057] The air pump is started synchronously and continuously outputs airflow. The airflow first enters the pipe 531 connected to it. The pipe 531 is composed of multiple interconnected short pipe arrays, which evenly distribute the airflow and make the airflow smoothly enter the annular air duct 530 that is adapted to the top of the outer cylinder 510 of the conical barrel 51.

[0058] Since the hollow space at the bottom of the ring duct 530 corresponds to the inner wall area of ​​the inner cylinder 511 and the top of the gap channel respectively, the evenly distributed airflow is naturally divided into two paths, which act simultaneously on the feeding mechanism 5 to achieve a double anti-sticking effect.

[0059] The first airflow passes through the hollow area at the bottom of the ring duct 530 corresponding to the inner cylinder 511, and acts directly on the inner wall of the inner cylinder 511 and the inner wall of the inner duct 522 connected thereto, specifically blowing away the medicinal particles that are attached to the pipe wall due to electrostatic adsorption and humidity adhesion, so as to avoid the particles remaining and accumulating in the narrow feeding channel.

[0060] The second airflow enters the sealed gap channel between the outer cylinder 510 and the inner cylinder 511 through the hollow area of ​​the corresponding gap channel at the bottom of the ring duct 530, and is then precisely discharged through the ventilation port 513 inside the base 512.

[0061] In the initial state, among a group of curved air ducts 523 symmetrically distributed on the outer wall of the inner tube 522, the top of one air duct 523 is precisely aligned with the vent 513. After the airflow enters the curved air duct 523, it will generate a thrust on the inner wall of the air duct 523 along the tangential direction of the inner tube 522, forming a torque that drives the inner tube 522 to rotate, thus causing the inner tube 522 to start rotating.

[0062] As the inner tube 522 continues to rotate, the air duct 523, which was originally aligned with the vent 513, gradually deviates from the vent 513, while the other air duct 523, which is symmetrical to it, gradually approaches and eventually aligns with the vent 513 during the rotation. The airflow then switches into the symmetrical air duct 523. Under the guidance of the curved air duct 523, a tangential thrust is generated in the opposite direction to the previous one, forming a reverse torque, which in turn drives the inner tube 522 to rotate in the opposite direction.

[0063] When the inner tube 522 rotates in the opposite direction to near the initial position, the two symmetrical air channels 523 once again complete the alignment switch with the ventilation port 513. The process of the airflow driving the inner tube 522 to rotate is repeated, so that the inner tube 522 can rotate periodically and generate uniform and continuous shaking, breaking the bridging structure formed by the pharmaceutical particles in the narrow feeding channel, and further promoting the smooth falling of the particles.

[0064] By coordinating two airflow paths, a dual anti-sticking effect is achieved through airflow purging and inner tube 522 vibration, ensuring that the metered granules can fall completely and smoothly into the synchronously moving bag blank below. Finally, the sealing and cutting mechanism 4 seals and cuts the filled bag blank to form independent granule bags. No manual intervention or cleaning is required throughout the process, ensuring the continuity of the packaging process and the accuracy of the granule filling.

[0065] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bagging device in an automatic packaging line for granule pouches, comprising a feeding mechanism (1), a metering mechanism (2), a longitudinal sealing and traction mechanism (3), a sealing and cutting mechanism (4), and a discharging mechanism (5), wherein the feeding mechanism (1) is disposed above the metering mechanism (2), the output port of the metering mechanism (2) is connected to the inlet of the discharging mechanism (5), the longitudinal sealing and traction mechanism (3) is disposed adjacent to the side wall of the discharging mechanism (5), and the sealing and cutting mechanism (4) is located below the discharging mechanism (5), characterized in that: The feeding mechanism (5) includes a conical barrel (51), a feeding pipe (52) is connected to the bottom of the conical barrel (51), and a blowing assembly (53) is arranged on the top of the conical barrel (51). The blowing assembly (53) is connected to an air pump. The conical barrel (51) has an outer cylinder (510) and an inner cylinder (511) coaxially sleeved together. A gap channel is formed between the outer wall of the inner cylinder (511) and the inner wall of the outer cylinder (510). The feed pipe (52) includes an outer pipe (520) fixedly connected to the bottom end of the conical barrel (51) and an inner pipe (522) rotatably sleeved on the inner wall of the outer pipe (520). The upper port of the inner tube (522) is connected to the lower port of the inner cylinder (511) to receive and transport the particles output by the metering mechanism (2). The blowing assembly (53) is configured to simultaneously guide the airflow to the gap channel and the inner wall area of ​​the inner cylinder (511). The airflow flowing to the inner wall of the inner cylinder (511) is used to sweep away the particles attached to its surface and the inner wall of the inner tube (522). The airflow flowing to the gap channel is guided to the top of the inner tube (522) and drives the inner tube (522) to rotate periodically relative to the outer tube (520), so that the inner tube (522) vibrates and promotes the downward shedding of particles on its inner wall.

2. The bagging equipment in the automatic granule bag packaging line according to claim 1, characterized in that: The conical barrel (51) also includes a base (512), which is fixedly connected between the bottom of the outer cylinder (510) and the inner cylinder (511), and the base (512) is provided with multiple ventilation holes (513).

3. The bagging equipment in the automatic granule bag packaging line according to claim 2, characterized in that: The bottom of the base (512) is fixedly connected to the feed tube (52), the bottom of the base (512) is fixedly connected to the top of the outer tube (520), and the bottom of the base (512) is movably connected to the top of the inner tube (522) so that the inner tube (522) is not affected when rotating on the inner wall of the outer tube (520).

4. The bagging equipment in the automatic granule bag packaging line according to claim 3, characterized in that: The feeding tube (52) also includes a collar (521), which is fixedly connected to the inner wall of the outer tube (520). The outer wall of the inner tube (522) is provided with a sliding groove, and the collar (521) is movably engaged in the sliding groove. The collar (521) is used to support and limit the rotation of the inner tube (522).

5. The bagging equipment in the automatic granule bag packaging line according to claim 4, characterized in that: The outer wall of the inner tube (522) near the top is provided with multiple air ducts (523), and the air ducts (523) are designed as curved channels.

6. The bagging equipment in the automatic granule bag packaging line according to claim 5, characterized in that: Two air ducts (523) are symmetrically distributed, and the two symmetrical air ducts (523) form a group, arrayed on the outer wall of the inner tube (522).

7. The bagging equipment in the automatic granule bag packaging line according to claim 6, characterized in that: One of the two symmetrical air ducts (523) has its top aligned with the vent (513). When the inner tube (522) rotates, it will cause the other air duct (523) of the two symmetrical air ducts (523) to be aligned with the vent (513).

8. The bagging equipment in the automatic granule bag packaging line according to claim 1, characterized in that: The blowing assembly (53) includes an annular air duct (530), which is fixedly connected to the top of the outer cylinder (510). The top of the annular air duct (530) is provided with a pipe (531), and the end of the pipe (531) is provided with an air pump.

9. The bagging equipment in the automatic granule bag packaging line according to claim 8, characterized in that: The overall shape of the annular duct (530) is the same as the top of the outer cylinder (510), and the hollow space at the bottom of the annular duct (530) is distributed between the inner cylinder (511) and the top of the gap channel.

10. The bagging equipment in the automatic granule bag packaging line according to claim 8, characterized in that: The pipe (531) consists of multiple short pipes arranged in an array at the top of the outer cylinder (510) and interconnected, used to evenly distribute the gas from the air pump inside the annular duct (530).

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