An external vacuum packaging machine for large bag vacuum packaging

Abstract

This invention discloses an external vacuum packaging machine for large bag vacuum packaging, relating to the field of vacuum packaging technology. It includes a machine body shell, inside which a first hydraulic cylinder is installed. A lifting angle plate is installed at the output end of the first hydraulic cylinder. A support plate is installed at the front end of the lifting angle plate. A gantry frame is installed at the front end of the support plate via a slot. Two sealing clamps are installed opposite each other at the bottom of the gantry frame. This invention, through a series of structures, automatically aligns the bag opening with the pre-leveling clamps, eliminating the need for repeated manual calibration. This solves the problems of low efficiency and large deviation in manual positioning, significantly improving the positioning accuracy and automation level of large bag material packaging. Compared to simply relying on sealing clamps for sealing, the vacuum sealing effect is superior. Simultaneously, the various components, through the linkage control of gears and racks, achieve coordinated connection of positioning, leveling, vacuuming, and sealing processes, greatly improving the packaging efficiency of large bags.

Description

Technical Field

[0001] This invention relates to the field of vacuum packaging technology, specifically to an external vacuum packaging machine for large bag vacuum packaging. Background Technology

[0002] Vacuum packaging technology is widely used in bulk packaging for materials in industries such as food, chemicals, and building materials because it effectively extends the shelf life of materials and prevents oxidation and moisture absorption. As the core equipment for bulk packaging, the performance of the external vacuum packaging machine directly affects packaging efficiency and quality.

[0003] Chinese patent CN116080988B discloses a vacuum packaging machine. By designing a sliding U-shaped plate in the compression and fixing mechanism, the machine secures the packaging bag when the sealing cap is closed. This ensures the bag opening is constantly pressed against the mounting base, preventing movement during air extraction. Simultaneously, the sliding U-shaped plate, adjusted to a suitable distance based on the bag size, can be pushed to fix the bag to both sides of the opening, securing it without hindering air expulsion. While this device is applicable, the process is disjointed, relying on manual handling, resulting in low automation. It also has poor adaptability, only capable of processing standard sizes.

[0004] Chinese patent publication number CN119568496A discloses a vacuum packaging machine. The machine involves placing a bag containing materials onto a first conveyor belt. A flipping mechanism then clamps the open end of the bag and flips it at a certain angle, so that the portion of the bag extending beyond the movable and fixed rollers faces the sealing mechanism. The sealing mechanism then performs vacuuming and heat sealing on the bag. The entire process requires no manual operation and can achieve continuous automatic vacuum heat sealing, thus greatly improving production efficiency. However, relying solely on mechanical functions for positioning and sealing the bag still introduces some errors and lacks intelligent control, posing a certain risk. Summary of the Invention

[0005] The purpose of this invention is to provide an external vacuum packaging machine for large bag vacuum packaging, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, an external vacuum packaging machine for large bag vacuum packaging is provided, comprising an outer frame profile and a machine body shell. A first hydraulic cylinder is installed inside the machine body shell. A lifting angle plate is installed at the output end of the first hydraulic cylinder. A support plate is installed at the front end of the lifting angle plate. A gantry frame is installed at the front end of the support plate via a slot. Two sealing clamps are installed opposite each other at the bottom of the gantry frame. A horizontal plate is installed at the front of the support plate below the gantry frame via a slot. There are two horizontal plates. Two spring telescopic structures are installed at opposite ends of the two horizontal plates. Pre-leveling clamps are installed at opposite ends of the two sets of spring telescopic structures. A bearing platform is installed at the front end of the machine body shell below the two pre-leveling clamps. A support frame is fixedly installed at the bottom of the bearing platform. A bottom shaft is installed at the middle position of the bottom end of the support frame. An inclined platform is rotatably connected to the bottom of the bottom shaft. A U-shaped bracket is installed at the bottom end of the inclined platform. Second hydraulic cylinders are hinged to both sides of the bottom end of the U-shaped bracket. An intelligent image acquisition module is installed at the top of the machine body shell.

[0007] Preferably, a conveying assembly is provided on one side of the bearing platform, and the bottom ends of the two second hydraulic cylinders are connected to a support angle plate. A support shaft is provided on one side of the inclined platform, and the support shaft is rotatably connected to the side of the support angle plate.

[0008] Preferably, a first electric push rod is connected to both sides of the opposite ends of the two horizontal plates and the opposite sides of the two sealing clamps. The two ends of the two sealing clamps are slidably connected to the bottom of the gantry frame. Two first telescopic rods are respectively provided at both sides of the opposite ends of the two horizontal plates and the opposite ends of the two sealing clamps on both sides of the first electric push rod.

[0009] Preferably, an air pump is provided at the top and bottom of the gantry frame, and an air pump port is installed at the bottom of the air pump via a hose.

[0010] Preferably, the air extraction port is located between two sealing clamps, and a second electric push rod is connected between the air extraction port and the air pump.

[0011] Preferably, two second telescopic rods are installed at the bottom of the lifting angle plates on both sides of the first hydraulic cylinder.

[0012] Preferably, two positioning clamps are installed at the top of the bearing platform through a slot, the bottom of the two positioning clamps extends to the bottom of the bearing platform, and the extended ends of the two positioning clamps are provided with a first rack. The two first racks are arranged opposite to each other, and a first drive gear is connected between the two first racks.

[0013] Preferably, the rear ends of the gantry frame and one of the cross plates extend out as support plates, and the extended ends of the gantry frame and the cross plate are provided with second racks. The two second racks are arranged opposite each other and are connected by a second drive gear.

[0014] Preferably, the outer surface of the bottom shaft is provided with a toothed ring, and the outer surface of the toothed ring is engaged with a telescopic rack structure.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention, an external vacuum packaging machine for large bags, achieves intelligent positioning and adaptive angle adjustment of large bag materials through the integrated design of an intelligent image acquisition module, a bottom shaft, and a telescopic rack structure. The intelligent image acquisition module can capture the placement status and bag opening position of the large bag materials in real time. The control system drives the bottom shaft to rotate based on the image analysis results, which in turn drives the carrying platform to precisely adjust the angle, so that the bag opening is automatically aligned with the pre-leveling clamp. This eliminates the need for repeated manual calibration, solves the problems of low efficiency and large deviation in manual positioning, and significantly improves the positioning accuracy and automation of large bag material packaging.

[0016] This invention, an external vacuum packaging machine for large bags, utilizes a pre-flattening clamping plate, a spring telescopic structure, and an inclined design for the gantry frame and sealing clamping plate to create a continuous operation mechanism of flattening, insertion, and sealing. The pre-flattening clamping plate grips the bag opening and lifts it upwards, effectively eliminating bag wrinkles and laying a flat foundation for sealing. Thanks to the inclined design, the sealing clamping plate can smoothly pass between the pre-flattening clamping plates and precisely fit the bag opening, avoiding gaps caused by residual wrinkles. Compared to simply relying on the sealing clamping plate to hold the seal, the vacuum sealing effect is superior. At the same time, the various components achieve coordinated connection of positioning, flattening, vacuuming, and sealing processes through the linkage control of gears and racks, significantly improving the packaging efficiency of large bags. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the support plate structure of the present invention; Figure 3 This is a schematic diagram of the lifting angle plate structure of the present invention; Figure 4 This is a schematic diagram of the inclined platform structure of the present invention; Figure 5 This is a schematic diagram of the support platform structure of the present invention; Figure 6 This is a schematic diagram of the support frame structure of the present invention; Figure 7 This is a rear perspective three-dimensional schematic diagram of the support plate structure of the present invention.

[0018] In the diagram: 1. Outer shell; 2. Support plate; 3. Pre-leveling clamp; 4. Support angle plate; 5. Bearing platform; 6. Conveying assembly; 7. Sealing clamp; 8. Gantry frame; 9. Lifting angle plate; 10. Intelligent image acquisition module; 11. First electric push rod; 12. First telescopic rod; 13. Spring telescopic structure; 14. Horizontal plate; 15. Air extraction port; 16. Second electric push rod; 17. Air extraction pump; 18. First hydraulic cylinder; 19. Second telescopic rod; 20. Support shaft; 21. Support frame; 22. Inclined platform; 23. U-shaped bracket; 24. Second hydraulic cylinder; 25. First drive gear; 26. Positioning clamp; 27. First rack; 28. Bottom shaft; 29. ​​Telescopic rack structure; 30. Gear ring; 31. Second drive gear; 32. Second rack. Detailed Implementation

[0019] 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.

[0020] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] like Figures 1 to 7As shown, this embodiment of the external vacuum packaging machine for large bag vacuum packaging includes a machine body shell 1 as the overall support carrier of the equipment, providing installation space and structural protection for the internal functional components, ensuring the stability of equipment operation. Inside the machine body shell 1, a first hydraulic cylinder 18 is installed as the core lifting power source, capable of precisely outputting linear driving force. A lifting angle plate 9 is installed at the output end of the first hydraulic cylinder 18 to receive the power of the first hydraulic cylinder 18, realizing the transmission of vertical displacement, and simultaneously providing a stable installation benchmark for the support plate 2. The front end of the lifting angle plate 9 is equipped with the support plate 2 as the installation carrier for components such as the gantry 8 and the horizontal plate 14, realizing the integrated assembly of functional components and ensuring synchronous lifting of each component. The front end of the support plate 2 is fitted with the gantry 8 via a slot as a sealing clamp. The sealing and vacuuming components, such as plate 7 and vacuum pump 17, provide installation support. The slotted structure ensures flexible component movement. Two sealing clamps 7, the core sealing execution components, are installed opposite each other at the bottom of the gantry frame 8. These clamps clamp and position the packaging bag opening for heat sealing. Their relative arrangement ensures complete sealing coverage. A horizontal plate 14 is installed in front of the support plate 2 below the gantry frame 8 via a slot, providing installation support for the spring telescopic structure 13 and the pre-leveling clamp 3. The slotted structure adapts to the position adjustment requirements of the horizontal plate 14. There are two horizontal plates 14, each with two spring telescopic structures 13 at their opposite ends. These structures provide elastic buffering, adapting to the thickness of the packaging bag to prevent excessive clamping and damage, while also ensuring the clamping stability of the pre-leveling clamp 3. Each end of the spring telescopic structure 13 is equipped with a pre-flattening clamping plate 3, a core flattening actuator. By clamping the top of the packaging bag and coordinating with the lifting action, it eliminates wrinkles at the bag opening, laying the foundation for precise sealing. Its top inclined design adapts to the insertion action of the sealing clamping plate 7. The front end of the outer shell 1 below the two pre-flattening clamping plates 3 is equipped with a bearing platform 5 as the direct bearing surface of the packaging bag, providing stable support for the packaging process and ensuring accurate placement of the packaging bag. A support frame 21 is fixedly installed at the bottom of the bearing platform 5 to strengthen the structural strength of the bearing platform 5 and prevent deformation when bearing heavy objects. It also provides an installation reference for the bottom shaft 28. The bottom shaft 28 is installed at the middle position of the bottom end of the support frame 21 as the core rotating shaft of the bearing platform 5, which works in conjunction with the gear ring 30 and... The telescopic rack and pinion structure 29 enables angle adjustment, ensuring precise alignment of the packaging bag opening with the pre-leveling clamp 3. The bottom of the base shaft 28 is rotatably connected to an inclined platform 22, whose tilt angle can be adjusted by rotation to accommodate different packaging bag sizes and assist in unloading after packaging. A U-shaped bracket 23 at the bottom of the inclined platform 22 provides a hinged mounting point for the second hydraulic cylinder 24, enabling steering of power transmission. Second hydraulic cylinders 24 are hinged to both sides of the bottom edge of the U-shaped bracket 23 to provide power for adjusting the angle of the inclined platform 22. Symmetrical arrangement on both sides ensures smooth and uniform tilting. The top of the machine casing 1 is equipped with an intelligent image acquisition module 10, a core intelligent detection component, which can collect real-time information on the position, shape, and other status of the packaging bags.Image analysis is fed back to the control system, providing precise data for adjusting the actions of each component and enabling automated adaptation to different packaging scenarios.

[0022] Specifically, a conveying component 6 is provided on one side of the carrying platform 5 to realize automatic feeding and unloading of packaging bags, reduce manual intervention, improve packaging efficiency, and form a complete material transmission link with the carrying platform 5. The bottom ends of the two second hydraulic cylinders 24 are connected to the support angle plate 4 to provide stable installation support for the second hydraulic cylinders 24, ensuring structural stability during power output. At the same time, it works with the support shaft 20 to ensure the rotation accuracy of the tilting platform 22. A support shaft 20 is provided on one side of the tilting platform 22 as an auxiliary rotation fulcrum for the tilting platform 22, reducing rotation resistance and improving the smoothness and accuracy of angle adjustment. The support shaft 20 is rotatably connected to the side of the support angle plate 4 to realize the fixed installation of the support shaft 20, while ensuring that its rotation function is not restricted.

[0023] Furthermore, a first electric push rod 11 is connected to both sides of the opposite ends of the two horizontal plates 14 and the opposite sides of the two sealing clamps 7, respectively, to provide precise power for the relative movement of the horizontal plates 14 and the clamping action of the sealing clamps 7. The displacement is precisely adjusted through electric control to adapt to packaging bag openings of different widths. The two ends of the two sealing clamps 7 are slidably connected to the bottom of the gantry frame 8 to ensure that the sealing clamps 7 move along a fixed trajectory during clamping and sealing, avoiding deviation and ensuring sealing accuracy. Two first telescopic rods 12 are respectively provided on both sides of the first electric push rod 11 at the opposite ends of the two horizontal plates 14 and the opposite sides of the two sealing clamps 7 to assist in guiding the movement of the horizontal plates 14 and the sealing clamps 7, in conjunction with the first electric push rod 11, to avoid shaking or deviation during the movement and improve motion accuracy.

[0024] Furthermore, the top and bottom of the gantry frame 8 are equipped with a vacuum pump 17, which is the core vacuum power source. It can quickly extract air from the packaging bag to meet the requirements of vacuum packaging and ensure the freshness of the packaging. The bottom of the vacuum pump 17 is equipped with a vacuum port 15, which is directly inserted into the packaging bag to extract air. The connection method of the hose is adapted to the position adjustment requirements of the vacuum port 15 to ensure smooth vacuuming process.

[0025] Furthermore, the air extraction port 15 is located between the two sealing clamps 7 to ensure that the air extraction port 15 can be accurately aligned with the opening of the packaging bag, while not affecting the clamping action of the sealing clamps 7, thus realizing the continuous operation of air extraction and sealing. The air extraction port 15 and the air pump 17 are connected by a second electric push rod 16 to provide power for the up and down movement of the air extraction port 15. The insertion depth of the air extraction port 15 can be adjusted according to the height of the packaging bag to improve the air extraction efficiency and vacuum degree.

[0026] Furthermore, two second telescopic rods 19 are installed at the bottom of the lifting angle plates 9 on both sides of the first hydraulic cylinder 18 to assist in guiding and supporting components. These rods work in conjunction with the first hydraulic cylinder 18 to achieve smooth lifting and lowering of the lifting angle plates 9, preventing tilting or shaking during the lifting process and improving the overall structural stability.

[0027] Furthermore, two positioning clamps 26 auxiliary positioning components are installed at the top of the support platform 5 through a slot. These components can clamp the packaging bag from both sides to prevent displacement of the packaging bag during the packaging process and ensure accurate positioning of the bag opening. The bottoms of the two positioning clamps 26 extend to the bottom of the support platform 5. Each extension end of the two positioning clamps 26 is equipped with a first rack 27 power transmission component. The relative movement of the positioning clamps 26 is achieved by meshing with the first drive gear 25. The two first racks 27 are positioned opposite each other and are connected to the power drive core of the first drive gear 25. By rotating, the two first racks 27 move synchronously in opposite directions, realizing the clamping and releasing action of the positioning clamps 26, ensuring accurate and efficient positioning.

[0028] Furthermore, the rear ends of the gantry frame 8 and one of the horizontal plates 14 both extend into support plates 2 to provide installation space for the second rack 32, ensuring a reasonable layout of the gear meshing structure. The extended ends of the gantry frame 8 and the horizontal plate 14 are both equipped with power transmission components for the second rack 32. Through meshing with the second drive gear 31, the gantry frame 8 and the horizontal plate 14 are linked and adjusted. The two second racks 32 are set up opposite to each other, and the two second racks 32 are connected to the power drive core of the second drive gear 31 through meshing. By rotating, the two second racks 32 move synchronously in opposite directions, realizing the coordinated action of the pre-leveling clamp 3 and the sealing clamp 7, ensuring the continuous connection of the leveling, degassing and sealing processes.

[0029] Furthermore, a toothed ring 30 is provided on the outer surface of the bottom shaft 28. The outer surface of the toothed ring 30 is meshed with a telescopic rack structure 29 power transmission component. The telescopic rack structure 29 drives the toothed ring 30 to rotate, thereby driving the bottom shaft 28 to rotate, realizing precise adjustment of the angle of the bearing platform 5, and ensuring precise alignment between the packaging bag opening and the pre-flattening clamp 3.

[0030] In this embodiment, after starting the equipment, all components automatically reset to their initial state: the pre-leveling clamp 3 is in the open state, the sealing clamp 7 is in the high position, the air extraction port 15 is retracted to the inside of the gantry 8, the carrying platform 5 remains horizontal, and the positioning clamp 26 is in the loose state. The operator places the large bag of material to be vacuum-packed on the carrying platform 5, ensuring that the bag opening faces the pre-leveling clamp 3. Alternatively, automated feeding can be achieved through the conveying component 6. The conveying component 6 accurately conveys the packaging bag to the preset position on the carrying platform 5 and then stops. The intelligent image acquisition module 10 on the top of the machine casing 1 collects the position of the packaging bag, the shape of the bag opening, and the material placement status on the carrying platform 5 in real time, and transmits the image data to the control system for analysis. Based on the analysis results, the control system drives the telescopic rack structure 29 to extend and retract. Through meshing with the toothed ring 30 on the outer surface of the bottom shaft 28, it drives the bottom shaft 28 to rotate, thereby causing the carrying platform 5 to finely adjust its angle around the bottom shaft 28. This ensures that the opening of the packaging bag is precisely aligned with the area between the two pre-leveling clamps 3. Simultaneously, the second hydraulic cylinder 24 can extend and retract appropriately according to the material height. Through the U-shaped bracket 23, it drives the tilting platform 22 to finely adjust its tilt angle around the support shaft 20, keeping the packaging bag in a relaxed state and preventing wrinkles at the bag opening. The control system drives the first drive gear 25 to rotate. Through meshing with the two opposing first racks 27, it causes the two positioning clamps 26 at the top of the carrying platform 5 to move relative to each other, clamping the material from both sides of the packaging bag and preventing subsequent processes from compromising it. When the packaging bag shifts, to ensure the bag opening remains stable, the first electric push rod 11 is activated, pushing the two horizontal plates 14 to move relative to each other. This causes the two sets of spring-loaded telescopic structures 13 and the pre-leveling clamping plate 3 to move closer simultaneously. After the pre-leveling clamping plate 3 contacts the top of the packaging bag, the spring-loaded telescopic structure 13 adaptively extends and retracts according to the thickness of the packaging bag, providing stable clamping force while avoiding damage to the packaging bag. Subsequently, the first hydraulic cylinder 18 is activated, driving the support plate 2, horizontal plates 14, and pre-leveling clamping plate 3 to rise simultaneously via the lifting angle plate 9. The pre-leveling clamping plate 3 clamps the top of the packaging bag and lifts it upwards, using the pulling force to eliminate wrinkles at the bag opening and complete the bag opening flattening process (the second telescopic rod 19 extends and retracts simultaneously to ensure smooth lifting and lowering). After the pre-leveling clamping plate 3 rises to the preset height, the control... The control system drives the second active gear 31 to rotate, which meshes with the two second racks 32 to drive the gantry frame 8 to descend synchronously while the horizontal plate 14 remains fixed (or its position is slightly adjusted). This causes the sealing clamp 7 to gradually approach the pre-flattening clamp 3. With the help of the inclined design on the outside of the gantry frame 8 and the inclined design on the top of the pre-flattening clamp 3, the sealing clamp 7 pushes the pre-flattening clamp 3 to open to both sides during its descent (compressed by the spring telescopic structure 13). Finally, the sealing clamp 7 passes between the two pre-flattening clamps 3 and precisely fits on both sides of the flattened bag opening. The sealing clamp 7 initially clamps the two sides of the bag opening (ensuring a sealed environment). The second electric push rod 16 is activated, pushing the air extraction port 15 downward and inserting it into the packaging bag through the gap between the two sealing clamps 7.Subsequently, the vacuum pump 17 starts, quickly extracting air from the packaging bag through the vacuum port 15. The intelligent image acquisition module 10 monitors the vacuum level inside the bag in real time (or provides feedback data through the device's built-in vacuum sensor). Once the preset vacuum value is reached, the vacuum pump 17 stops working, and the second electric push rod 16 drives the vacuum port 15 to retract and reset upwards. After the vacuum port 15 resets, the sealing clamp 7 activates its heating function. Simultaneously, the first electric push rod 11 further drives the sealing clamp 7 to clamp the bag opening, performing heat sealing. After sealing, the sealing clamp 7 stops heating and releases, and the first electric push rod 11 drives it to reset to both sides. The drive gear 31 rotates in the reverse direction, causing the gantry 8 to rise and reset. The pre-leveling clamp 3 resets and opens under the elastic action of the spring telescopic structure 13. The positioning clamp 26 is released under the reverse drive of the first drive gear 25. The second hydraulic cylinder 24 extends and retracts, causing the tilting platform 22 to rotate around the support shaft 20 to a preset tilt angle. The carrying platform 5 tilts with the tilting platform 22. The packaged finished product slides down the carrying platform 5 to the conveying component 6 under the action of gravity, or slides directly into the finished product collection area. The conveying component 6 starts, conveying the finished product to the next process. All components of the equipment are fully reset, ready for the next packaging cycle.

[0031] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An external vacuum packaging machine for large bag vacuum packaging, comprising a machine body shell (1), characterized in that: The outer casing (1) of the machine body is equipped with a first hydraulic cylinder (18). The output end of the first hydraulic cylinder (18) is equipped with a lifting angle plate (9). A support plate (2) is installed at the front end of the lifting angle plate (9). A gantry frame (8) is installed at the front end of the support plate (2) through a slot. Two sealing clamps (7) are installed opposite each other at the bottom of the gantry frame (8). A horizontal plate (14) is installed in front of the support plate (2) below the gantry frame (8) through a slot. There are two horizontal plates (14). Two spring telescopic structures (13) are provided at the opposite ends of the two horizontal plates (14). The two sets of spring telescopic structures (13) Each of the two pre-leveling clamps (3) is provided with a pre-leveling clamp (3). The front end of the outer shell (1) of the machine body (1) below the two pre-leveling clamps (3) is provided with a bearing platform (5). A support frame (21) is fixedly installed at the bottom of the bearing platform (5). A bottom shaft (28) is installed at the middle position of the bottom end of the support frame (21). An inclined platform (22) is rotatably connected to the bottom of the bottom shaft (28). A U-shaped bracket (23) is provided at the bottom end of the inclined platform (22). A second hydraulic cylinder (24) is hinged at both sides of the bottom end of the U-shaped bracket (23). An intelligent image acquisition module (10) is installed on the top of the outer shell (1).

2. The external vacuum packaging machine for large bag vacuum packaging according to claim 1, characterized in that: A conveying assembly (6) is provided on one side of the bearing platform (5), and the bottom ends of the two second hydraulic cylinders (24) are connected to a support angle plate (4). A support shaft (20) is provided on one side of the inclined platform (22), and the support shaft (20) is rotatably connected to the side of the support angle plate (4).

3. The external vacuum packaging machine for large bag vacuum packaging according to claim 1, characterized in that: A first electric push rod (11) is connected to both sides of the opposite ends of the two horizontal plates (14) and the opposite sides of the two sealing clamps (7). The two ends of the two sealing clamps (7) are slidably connected to the bottom of the gantry frame (8). Two first telescopic rods (12) are respectively provided at both sides of the opposite ends of the two horizontal plates (14) and the opposite sides of the two sealing clamps (7) on the sides of the first electric push rod (11).

4. The external vacuum packaging machine for large bag vacuum packaging according to claim 1, characterized in that: The top and bottom of the gantry (8) are equipped with an air pump (17), and the bottom of the air pump (17) is equipped with an air extraction port (15) through a hose.

5. The external vacuum packaging machine for large bag vacuum packaging according to claim 4, characterized in that: The air extraction port (15) is located between two sealing clamps (7), and the air extraction port (15) and the air pump (17) are connected by a second electric push rod (16).

6. The external vacuum packaging machine for large bag vacuum packaging according to claim 1, characterized in that: Two second telescopic rods (19) are installed at the bottom of the lifting angle plates (9) on both sides of the first hydraulic cylinder (18).

7. The external vacuum packaging machine for large bag vacuum packaging according to claim 1, characterized in that: The top of the support platform (5) is equipped with two positioning clamps (26) through a slot. The bottom of the two positioning clamps (26) extends to the bottom of the support platform (5). The extended ends of the two positioning clamps (26) are provided with first racks (27). The two first racks (27) are set opposite to each other. The two first racks (27) are connected together by a first drive gear (25).

8. The external vacuum packaging machine for large bag vacuum packaging according to claim 1, characterized in that: The gantry (8) and one of the horizontal plates (14) both extend into a support plate (2). The extended ends of the gantry (8) and the horizontal plate (14) are both provided with a second rack (32). The two second racks (32) are arranged opposite each other, and the two second racks (32) are connected by a second drive gear (31) meshing together.

9. The external vacuum packaging machine for large bag vacuum packaging according to claim 1, characterized in that: The outer surface of the bottom shaft (28) is provided with a toothed ring (30), and the outer surface of the toothed ring (30) is engaged with a telescopic rack structure (29).

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