Auxiliary discharging device for bag-sealed packaging

Abstract

The application relates to an air bag sealed packaging auxiliary discharging device, and belongs to the technical field of discharging and sealing equipment. The device comprises an extension outer pipe, a dust removal pipe, a balance pipe, a discharging air bag, an elastic tightening belt, a reset spring, a pneumatic assembly, a limiting ring and a shaping ring. The discharging air bag is sleeved outside the extension outer pipe. The elastic tightening belt is annular and adhered to the inner wall of the large-diameter discharging air bag. The multiple reset springs are connected between the small-diameter inner wall and the elastic tightening belt in the radial direction of the discharging air bag and are circumferentially distributed. The limiting ring is sleeved outside the discharging air bag, and a fixed gap for the ton bag inlet to penetrate is formed between the shaping ring and the outer edge of the discharging air bag in the deflated state. The elastic tightening belt and the reset spring are matched, synchronous and regular contraction of each part can be realized when the discharging air bag is deflated, so that ton bag replacement can be completed without manual air bag edge arrangement.

Description

Technical Field

[0001] This application relates to the technical field of material feeding and sealing equipment, and in particular to an airbag sealing packaging auxiliary feeding device. Background Technology

[0002] Currently, open-top packaging machines are commonly used for ton bag packaging of powdery materials. While these machines are simple in structure and inexpensive, they struggle to effectively control dust spillage during the packaging process, making them primarily suitable for environments with low dust pollution requirements. However, with increasingly stringent environmental regulations, industries such as chemical, food, and pharmaceuticals are placing higher demands on dust control during the packaging of powdery materials.

[0003] To address the issue of dust leakage, semi-enclosed packaging equipment has gradually been introduced into the market. However, the sealing performance of existing semi-enclosed equipment remains limited, and it often requires a complex dust removal system, significantly increasing the overall cost of the equipment. To further improve the sealing effect, some technologies have explored installing airbags at the discharge end of the feeding pipe. By inflating the airbags, the gap between the feeding pipe and the inlet of the ton bag is sealed, effectively preventing dust and material leakage.

[0004] However, in practical applications, the aforementioned airbag sealing structure still has the following problems: When completing a packaging cycle and replacing the ton bag, the airbag needs to be deflated to separate the ton bag from the feeding pipe. However, after deflation, the outer edge of the airbag often shrinks irregularly, resulting in inconsistent local shrinkage. If a new ton bag is directly replaced at this time, the feeding port of the ton bag cannot easily pass through the outer edge of the airbag, and the operator needs to manually adjust the outer edge of the airbag before continuing the next bagging operation. This manual intervention not only reduces the efficiency of the packaging operation but also increases the labor intensity of the operators, restricting the automation level and continuous operation capability of the equipment.

[0005] Therefore, a new auxiliary feeding device is urgently needed. Summary of the Invention

[0006] To address the issue that existing airbag-assisted feeding devices require operators to manually adjust the outer edge of the airbag each time a ton bag is replaced, this application provides an airbag-sealed packaging auxiliary feeding device.

[0007] This application provides an airbag-sealed packaging auxiliary feeding device, which adopts the following technical solution: An airbag-sealed packaging auxiliary feeding device includes: The outer tube is extended and detachably connected to the feed tube. Dust collection pipe, installed on the extended outer pipe and used to absorb dust generated during bag removal; A balance tube is installed on the extended outer tube and is used to absorb excess gas inside the ton bag; The feeding airbag is ring-shaped and sleeved on the outside of the extended outer tube. The outer edge of the feeding airbag contacts and adheres to the outer edge of the extended outer tube. An elastic tension band is located inside the feeding airbag. The elastic tension band is ring-shaped and adheres to the inner wall of the large diameter of the feeding airbag. The elastic tension band is made of high-elasticity rubber, silicone, or thermoplastic polyurethane. A return spring is located inside the feeding airbag. One end of the return spring is connected to the inner wall of the small diameter, and the other end is connected to the elastic tightening band. The axis of the return spring is along the radial direction of the annular feeding airbag. There are multiple return springs and they are evenly distributed in a circle. A pneumatic assembly, connected to the outer edge of the extended outer tube and used to supply gas to the feeding airbag; A limiting ring is sleeved on the outside of the feeding airbag, and the limiting ring is connected to the extended outer tube; A shaping ring is sleeved on the outside of the feeding airbag and passes through the limiting ring. The side of the shaping ring facing the limiting ring is attached to the limiting ring. The side of the shaping ring facing the feeding airbag is arc-shaped and has a fixed gap with the outer edge of the feeding airbag in the deflated state. The inlet of the ton bag is inserted into the fixed gap to complete the filling. The elastic band and the return spring work together to ensure that the various parts of the feeding airbag contract synchronously and regularly when it deflates.

[0008] By adopting the above technical solution, the extended outer tube is detachably connected to the feeding pipe, facilitating replacement or maintenance according to different working conditions. The dust removal pipe and the balance pipe are used to absorb dust from bag removal and excess gas inside the ton bag, respectively, effectively improving the working environment and ensuring smooth feeding. The coordinated arrangement of the feeding airbag, elastic tightening band, and multiple return springs ensures that the airbag receives uniform radial tension on its outer circumference when deflated, while the elastic tightening band provides circumferential clamping force, thereby achieving synchronous and orderly contraction of all parts of the feeding airbag. The setting of the limiting ring and shaping ring provides a stable insertion gap at the ton bag inlet, ensuring that the outer edge of the airbag does not need to be manually adjusted when changing ton bags, improving packaging efficiency and automation.

[0009] Optionally, the shaping ring is recessed into the side of the feeding cylinder to form an arc surface.

[0010] By adopting the above technical solution, the shaping ring is concave to the side of the feeding airbag to form an arc surface, which can form a more closely fitting surface contact with the outer edge of the airbag when the feeding airbag is inflated, thereby increasing the clamping area and friction of the ton bag inlet, improving the sealing effect and preventing dust leakage.

[0011] Optionally, the limiting ring has a first connecting hole and the shaping ring has a second connecting hole. A connecting bolt is inserted into both the first connecting hole and the second connecting hole to achieve a detachable connection between the limiting ring and the shaping ring.

[0012] By adopting the above technical solution, a first connecting hole is opened on the limiting ring and a second connecting hole is opened on the shaping ring. A detachable connection is achieved by using connecting bolts, which not only facilitates the installation, disassembly and replacement of the shaping ring, but also ensures the connection strength and positioning accuracy between the shaping ring and the limiting ring, which is conducive to long-term stable use.

[0013] Optionally, the height of the shaping ring is greater than the height of the feeding airbag after it is expanded.

[0014] By adopting the above technical solution, the height of the shaping ring is greater than the height of the feeding airbag after it is inflated, so that the feeding airbag is still completely within the coverage area of ​​the shaping ring after it is fully inflated. This ensures that the airbag is always guided and limited by the shaping ring when it inflates, avoiding local over-expansion or displacement of the airbag, and improving sealing reliability and service life.

[0015] Optionally, the center of the limiting ring, the center of the shaping ring, and the center of the feeding airbag in the open state completely coincide.

[0016] By adopting the above technical solution, the center of the limiting ring, the center of the shaping ring, and the center of the feeding airbag in the open state are completely coincident, which ensures that the feeding airbag is subjected to uniform force during the inflation process, avoids eccentricity or local stress concentration, and thus makes the ton bag inlet subjected to uniform clamping force in the circumferential direction, improving the uniformity and stability of the seal.

[0017] Optionally, the elastic band is attached to the middle position of the large-diameter inner wall of the feeding airbag, and the return spring is located at the middle position of the feeding airbag.

[0018] By adopting the above technical solution, the elastic tightening band is attached to the middle position of the inner wall of the large diameter of the feeding airbag, and the reset spring is also located in the middle position of the feeding airbag. This ensures that the circumferential clamping force and radial tension are both applied to the key parts of the airbag, optimizing the force distribution and further ensuring that the outer edge of the airbag can be regular and synchronously contracted when it deflates, avoiding local collapse or warping.

[0019] Optionally, the number of reset springs is six, the six reset springs have the same elastic coefficient, and the six reset springs are evenly distributed in a circle.

[0020] By adopting the above technical solution, the number of reset springs is six and the elastic coefficient is the same. They are evenly distributed in a circumferential shape, so that the feeding airbag is subjected to uniform and symmetrical radial tension in the circumferential direction. This not only ensures the synchronicity of the contraction during deflation, but also controls the number of components and manufacturing costs while meeting functional requirements, thus having good economic efficiency and practicality.

[0021] Optionally, a connecting rod is also included, one end of which is connected to the limiting ring and the other end of which is connected to the extension outer tube.

[0022] By adopting the above technical solution, one end of the connecting rod is connected to the limiting ring and the other end is connected to the extended outer tube, which realizes the rigid fixation between the limiting ring and the extended outer tube, ensuring that the limiting ring and the shaping ring always maintain a stable position during the feeding and airbag inflation and deflation process, avoiding displacement due to vibration or external force, and improving the reliability of the device.

[0023] Optionally, the connecting rod is L-shaped, and there are multiple connecting rods arranged in a circumferentially evenly distributed manner.

[0024] By adopting the above technical solution, the connecting rod is L-shaped and has multiple circumferences evenly distributed, which can effectively transmit and disperse the force between the limiting ring and the extended outer tube, facilitate a stable connection in a limited space, and help maintain the compactness and symmetry of the overall structure of the device.

[0025] Optionally, the pneumatic assembly includes a pneumatic support, a pneumatic valve, and an air pump. The pneumatic support is disposed on the outer edge of the extended outer tube. The pneumatic valve and the air pump are both detachably fixed to the pneumatic support. The feeding airbag is also provided with a quick-connect connector. The air pump is connected to the pneumatic valve and the quick-connect connector in sequence via a pipeline.

[0026] By adopting the above technical solution, the pneumatic components include a pneumatic support, a pneumatic valve, and an air pump, and are connected to the feeding airbag through quick-connect couplings and pipelines, realizing centralized control of the inflation and deflation of the feeding airbag; the pneumatic valve can maintain the airbag pressure after inflation, ensuring the continuous stability of the sealing state; the overall structure has a high degree of modularity, which is convenient for installation, maintenance and replacement, improving the operation convenience and automation level of the device.

[0027] In summary, this application includes at least one of the following beneficial technical effects: This application incorporates an elastic tension band and multiple circumferentially distributed return springs inside the feeding airbag. These two elements work together to ensure that the airbag's outer edge contracts synchronously and regularly after deflation. This guarantees a uniform and consistent fixed gap between the airbag and the shaping ring. When changing ton bags, operators do not need to manually adjust the outer edge of the airbag; the ton bag's inlet can be smoothly inserted into the fixed gap. This significantly reduces manual intervention and improves the continuity and automation level of packaging operations.

[0028] This application effectively absorbs dust from the bag and excess gas inside the ton bag through a dust removal pipe and a balance pipe, respectively, avoiding dust overflow and the impact of air pressure fluctuations inside the bag on the material discharge rate. Simultaneously, after the discharge airbag is inflated, its outer edge evenly presses the ton bag's inlet onto the concave arc-shaped shaping ring, forming a large-area seal that effectively prevents powdery materials from leaking into the external environment during the descent, meeting stringent environmental protection requirements.

[0029] This application utilizes a detachable connection between the extended outer tube and the feeding tube, a detachable fixing mechanism for the limiting ring and the shaping ring using connecting bolts, and a modular installation method for the pneumatic components, making the entire device easy to disassemble, replace, and maintain. Furthermore, the limiting ring, shaping ring, and the feeding airbag in its expanded state are aligned at their centers, and multiple evenly distributed connecting rods provide stable support for the limiting ring, ensuring balanced force during the airbag's inflation and deflation process and structural reliability over long-term use. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of an airbag-sealed packaging auxiliary feeding device provided in this application; Figure 2 yes Figure 1 A schematic diagram of the middle section structure; Figure 3 yes Figure 2 A schematic diagram of the middle section structure; Figure 4 This is a schematic diagram of the structure of the mating part of the feeding airbag, elastic tension band and return spring in this application; Figure 5 This is a cross-sectional view of the shaping ring provided in this application; Figure 6 This is a cross-sectional view of the assembled limiting ring and shaping ring provided in this application.

[0031] In the diagram: 1. Extended outer tube; 2. Dust removal tube; 3. Balance tube; 4. Feeding airbag; 5. Elastic tension band; 6. Return spring; 7. Limiting ring; 8. Shaping ring; 9. Connecting bolt; 10. Connecting rod; 11. Pneumatic support; 12. Pneumatic valve; 13. Air pump; 14. Quick connector; 15. Ton bag; 41. Small diameter inner wall; 42. Large diameter inner wall. Detailed Implementation

[0032] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0033] This application discloses an airbag-sealed packaging auxiliary feeding device.

[0034] refer to Figures 1 to 3 An airbag-sealed packaging auxiliary feeding device includes an extended outer tube 1, a dust removal tube 2, a balance tube 3, a feeding airbag 4, an elastic tension band 5, a return spring 6, a pneumatic assembly, a limiting ring 7, and a shaping ring 8. The extended outer tube 1 is fixed to the discharge end of the feeding tube via a flange connection. The dust removal tube 2 is installed on the extended outer tube 1, and its interior is connected to the interior of the extended outer tube 1. The dust removal tube 2 is used to absorb dust generated when the ton bag is collected after feeding, thus preventing dust from drifting into the surrounding working environment. The balance tube 3 is installed on the extended outer tube 1, and its interior is connected to the interior of the extended outer tube 1. The balance tube 3 is used to absorb gas from inside the ton bag during feeding, thus preventing the gas inside the ton bag from affecting the feeding rate within the feeding tube.

[0035] refer to Figure 1 and Figure 4 The feeding airbag 4 is ring-shaped (or donut-shaped when fully inflated) and is fitted over the outside of the extension tube 1. The outer edge of the feeding airbag 4 contacts the outer wall of the extension tube 1 and adheres to the outer edge of the extension tube 1. The elastic band 5 is located inside the feeding airbag 4 and is ring-shaped. The elastic band 5 is made of high-elasticity rubber, silicone, or thermoplastic polyurethane. Since the elastic band 5 is attached to the inside of the feeding airbag 4, the expansion and contraction of the feeding airbag 4 will be guided by the elastic band 5, thus ensuring the regular changes of the feeding airbag 4 during inflation and deflation.

[0036] refer to Figure 3 and Figure 4 The return spring 6 is located inside the feeding airbag 4. One end of the return spring 6 is connected to the inner wall 41 of the small diameter, and the other end is connected to the elastic tension band 5. There are multiple return springs 6, and they are evenly distributed circumferentially. During the inflation of the feeding airbag 4, the return spring 6 is stretched; during the deflation of the feeding airbag 4, the return spring 6 releases potential energy and returns to its original length. Because there are multiple return springs 6, and they are evenly distributed circumferentially, the outer edge of the feeding airbag 4 remains under traction during deflation. Furthermore, since the axis of the return spring 6 is along the radial direction of the annular feeding airbag 4, the traction force of the return spring 6 is along the radial direction of the feeding airbag 4.

[0037] refer to Figure 3 and Figure 4 The combination of the elastic tightening band 5 and the return spring 6 enables the outer edge of the feeding airbag 4 to contract or expand in a regular and synchronous manner. The elastic tightening band 5 provides circumferential clamping, while the return spring 6 provides radial tension; the former is used to maintain the consistent shape of the feeding airbag 4, and the latter is used to enable the feeding airbag 4 to retract synchronously after deflation.

[0038] Because the feeding airbag 4 can shrink and expand synchronously, when the ton bag is filled with material and the next ton bag is placed, the gap between the outer edge of the feeding airbag 4 and the shaping ring 8 is equal, and there is no situation where some are more and some are less. Therefore, the inlet end of the ton bag can be stably inserted into the fixed gap between the feeding airbag 4 and the shaping ring 8, without the need for operators to tidy up or interfere with the inlet of the ton bag, thereby improving the efficiency of material dispensing.

[0039] refer to Figures 1 to 3 The pneumatic component is connected to the extended outer tube 1 and is used to supply gas to the discharge airbag 4. The limiting ring 7 is connected to the extended outer tube 1 and sleeved on the outside of the discharge airbag 4. The shaping ring 8 is detachably fixed between the limiting ring 7 and the discharge airbag 4. The shaping ring 8 is fixed on the limiting ring 7 and also sleeved on the outside of the discharge airbag 4. The side of the shaping ring 8 facing the discharge airbag 4 is a concave arc surface. A fixed gap is formed between the shaping ring 8 and the discharge airbag 4. The inlet of the ton bag is inserted into the fixed gap. Then the discharge airbag 4 will inflate and expand. The outer edge of the discharge airbag 4 will squeeze the inlet end of the ton bag onto the shaping ring 8. Thus, the discharge airbag 4 achieves the sealing between the ton bag and the discharge pipe (or the extended outer tube 1), ensuring that the dust material will not flow into the outside during the falling process.

[0040] refer to Figure 3 and Figure 5 Because the shaping ring 8 is fitted around the outside of the feeding airbag 4, and the side of the shaping ring 8 facing the feeding airbag 4 is concave, the feeding end of the ton bag will fit against the concave arc surface of the shaping ring 8 under the compression of the feeding airbag 4. In addition, the outer edge of the feeding airbag 4 will abut against the concave arc surface, thereby achieving a certain shaping of the feeding airbag 4 and ensuring the effectiveness of the return spring 6 and the elastic tightening band 5 inside the feeding airbag 4.

[0041] refer to Figure 5 and Figure 6To achieve a detachable connection between the shaping ring 8 and the limiting ring 7, a first connecting hole is formed on the limiting ring 7, and a second connecting hole is formed on the shaping ring 8. The first and second connecting holes are coaxially arranged. The first connecting hole is a smooth hole, while the second connecting hole is a threaded hole. The first connecting hole extends through both sides of the limiting ring 7, and the connecting bolt 9 passes through the first connecting hole and then into the second connecting hole. Multiple first and second connecting holes are present and evenly distributed. To facilitate installation and manufacturing and reduce production costs, the height of the shaping ring 8 is the same as the height of the limiting ring 7.

[0042] refer to Figures 1 to 3 In order to ensure that the shaping ring 8 can better guide the expanded feeding airbag 4, the height of the shaping ring 8 is set to be greater than the height of the feeding airbag 4 after it is expanded. That is, after the feeding airbag 4 is inflated, the projection of the feeding airbag 4 on the concave arc surface of the shaping ring 8 is completely on the concave arc surface.

[0043] To ensure that the feeding airbag 4 can fully expand after inflation, and to ensure that the applied force can be decomposed so that the vertical force can be canceled out and the horizontal force can be balanced, the center of the limiting ring 7, the center of the shaping ring 8 and the center of the feeding airbag 4 in the expanded state are set to be completely coincident.

[0044] refer to Figure 4 In order to ensure the orderly expansion and contraction of the feeding airbag 4, the elastic tightening band 5 is completely attached to the large-diameter inner wall 42 of the feeding airbag 4, and the return spring 6 is located at the center of the feeding airbag 4.

[0045] refer to Figure 4 In order to reduce the manufacturing and operating costs of the entire device, the number of return springs 6 is set to six. The six return springs 6 have the same elastic coefficient and are evenly distributed in a circle.

[0046] refer to Figure 1 In order to ensure that the limiting ring 7 is stably installed on the extension outer tube 1, a connecting rod 10 is welded to the top of the limiting ring 7. The connecting rod 10 is in the shape of "L" and the other end of the connecting rod 10 is welded to the extension outer tube 1.

[0047] refer to Figure 1 and Figure 2The pneumatic assembly includes a drive bracket, a pneumatic valve 12, and an air pump 13. The pneumatic bracket 11 is detachably fixed to the extension outer tube 1. The pneumatic valve 12 and the air pump 13 are detachably connected to the pneumatic bracket 11. The feeding airbag 4 is equipped with a quick-connect connector 14. The air pump 13 is connected to the pneumatic valve 12, the quick-connect connector 14, and the feeding airbag 4 in sequence via an air tube. The air pump 13 is used to inflate and deflate the feeding airbag 4, and the pneumatic valve 12 is used to maintain the feeding airbag 4 in an inflated state.

[0048] The airbag sealing packaging auxiliary feeding device provided in this application, compared with the traditional device that uses a single airbag for sealing: In traditional devices, the contraction shape of the airbag after deflation depends entirely on the airbag's own elastic recovery ability. Because the stretching of different parts of the airbag's outer edge may vary after inflation (for example, the stretching is greater near the nozzle and less further away), and the airbag material itself may have unevenness, the contraction of the airbag's outer edge after deflation is extremely irregular, often resulting in localized bulges or depressions. When changing ton bags, operators must spend time manually adjusting these irregular parts, pressing the bulges back in; otherwise, the ton bag's inlet cannot be smoothly inserted.

[0049] This application fundamentally changes the mechanical mechanism of airbag deflation and contraction by adding an elastic tightening band (5) and multiple radially distributed return springs (6) inside the airbag. The elastic tightening band (5) provides an active circumferential contraction force, ensuring that the large-diameter part of the airbag contracts uniformly in the circumferential direction; the return springs (6) provide an active radial contraction force, ensuring that the airbag retracts synchronously in each radial direction. The two work together to make the outer edge of the airbag after deflation regular in shape and uniform in gap, thus completely eliminating the need for manual handling. This improvement seems simple, but it has significant implications for efficiency improvement in actual production: based on saving 5-10 seconds of manual handling time per bag change, for a large-scale packaging production line that changes bags hundreds of times a day, it can save tens of minutes to several hours of operation time per day, while significantly reducing the labor intensity of operators, which is conducive to the automation and intelligentization of packaging operations.

[0050] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An airbag-sealed packaging auxiliary feeding device, characterized in that, include: The outer tube (1) is extended and detachably connected to the feed tube; Dust removal pipe (2) is installed on the extended outer pipe (1) and is used to absorb dust generated during bag removal; Balance tube (3) is installed on the extended outer tube (1) and is used to absorb excess gas in the ton bag; The feeding airbag (4) is annular and sleeved on the outside of the extended outer tube (1). The outer edge of the feeding airbag (4) contacts and adheres to the outer edge of the extended outer tube (1). The elastic band (5) is located inside the feeding airbag (4). The elastic band (5) is ring-shaped and adheres to the inner wall of the large diameter of the feeding airbag (4). The elastic band (5) is made of high elastic rubber, silicone or thermoplastic polyurethane. The return spring (6) is located inside the feeding airbag (4). One end of the return spring (6) is connected to the inner wall of the small diameter, and the other end is connected to the elastic tightening band (5). The axis of the return spring (6) is along the radial direction of the annular feeding airbag (4). There are multiple return springs (6) and they are evenly distributed in a circle. A pneumatic assembly is connected to the outer edge of the extended outer tube (1) and is used to supply gas to the feeding airbag (4); A limiting ring (7) is fitted around the outside of the feeding airbag (4), and the limiting ring (7) is connected to the extension outer tube (1); A shaping ring (8) is fitted around the outside of the feeding airbag (4) and passes through the limiting ring (7). The side of the shaping ring (8) facing the limiting ring (7) is attached to the limiting ring (7). The side of the shaping ring (8) facing the feeding airbag (4) is arc-shaped and has a fixed gap with the outer edge of the feeding airbag (4) in the deflated state. The inlet of the ton bag is inserted into the fixed gap to complete the filling. The elastic band (5) and the reset spring (6) work together to make the various parts of the feeding airbag (4) contract synchronously and regularly when it deflates.

2. The airbag-sealed packaging auxiliary feeding device according to claim 1, characterized in that: The shaping ring (8) is concave to form an arc surface facing the side of the feeding cylinder.

3. The airbag-sealed packaging auxiliary feeding device according to claim 2, characterized in that: The limiting ring (7) has a first connecting hole, and the shaping ring (8) has a second connecting hole. The first connecting hole and the second connecting hole are simultaneously inserted into the connecting bolt (9) to realize the detachable connection between the limiting ring (7) and the shaping ring (8).

4. The airbag-sealed packaging auxiliary feeding device according to claim 3, characterized in that: The height of the shaping ring (8) is greater than the height of the feeding airbag (4) after it is opened.

5. The airbag-sealed packaging auxiliary feeding device according to claim 4, characterized in that: The center of the limiting ring (7), the center of the shaping ring (8), and the center of the feeding airbag (4) in the open state are completely coincident.

6. The airbag-sealed packaging auxiliary feeding device according to any one of claims 1-5, characterized in that: The elastic tightening band (5) is attached to the middle position of the large-diameter inner wall of the feeding airbag (4), and the reset spring (6) is located in the middle position of the feeding airbag (4).

7. The airbag-sealed packaging auxiliary feeding device according to claim 6, characterized in that: The number of reset springs (6) is six, the six reset springs (6) have the same elastic coefficient, and the six reset springs (6) are evenly distributed in a circle.

8. An airbag-sealed packaging auxiliary feeding device according to any one of claims 1-5, characterized in that: It also includes a connecting rod (10), one end of which is connected to the limiting ring (7) and the other end is connected to the extension outer tube (1).

9. The airbag-sealed packaging auxiliary feeding device according to claim 8, characterized in that: The connecting rod (10) is L-shaped, and there are multiple connecting rods (10) arranged in a circumferentially evenly distributed manner.

10. An airbag-sealed packaging auxiliary feeding device according to any one of claims 1-5, characterized in that: The pneumatic assembly includes a pneumatic bracket (11), a pneumatic valve (12), and an air pump (13). The pneumatic bracket (11) is disposed on the outer edge of the extended outer tube (1). The pneumatic valve (12) and the air pump (13) are both detachably fixed on the pneumatic bracket (11). The feeding air bag (4) is also provided with a quick connector (14). The air pump (13) is connected to the pneumatic valve (12) and the quick connector (14) in sequence through a pipeline.

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