Continuous rolling type vacuumizing packaging machine

Abstract

The invention relates to the technical field of packaging machinery, in particular to a continuous rolling type vacuumizing packaging machine which comprises a conveying belt, two conveying rollers, multiple sets of packaging units and an air suction structure, the conveying belt is arranged on the two conveying rollers in a transmission mode, the multiple sets of packaging units are installed on the outer wall of the conveying belt, and when the conveying rollers rotate, the air suction structure is arranged on the conveying belt. The conveying belt is used for circularly conveying the multiple groups of packaging units; the packaging unit comprises a vacuum box and a long cover, the vacuum box is fixed to the conveying belt, and the length direction of the vacuum box is perpendicular to the vertical direction of the conveying belt. Through the design of continuous rotary motion, the continuity of the packaging process is achieved, the packaging period is remarkably shortened, and therefore the packaging efficiency is improved, and due to the fact that the air extraction amount is reduced during packaging, a vacuum environment can be conveniently and rapidly generated, air in a packaging bag can be conveniently and rapidly exhausted, the packaging time of the packaging bag is shortened, and the packaging efficiency is improved. And meanwhile, the energy consumption of vacuumizing is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of packaging machinery, in particular to a continuous rolling vacuum packaging machine. Background Art

[0002] With the continuous development of the food processing industry and consumers' increasing demand for food safety and preservation, vacuum packaging technology has become one of the important means to extend the shelf life of food and improve product quality.

[0003] The rolling vacuum packaging machine is a commonly used packaging machine. It transports the packaging bag containing the items to the bottom of the vacuum chamber through a conveyor belt, then moves the vacuum chamber down and buckles it on the outside of the items to extract the air in the vacuum chamber. At this time, the air in the packaging bag is discharged, and then the bag mouth is heat-pressed and sealed, and the vacuum chamber is inflated to restore it to normal pressure. At this time, since the air in the packaging bag is extracted, the packaging bag is close to the items inside, thereby realizing vacuum packaging.

[0004] However, the above packaging method requires the conveyor belt to stop running during packaging, so the packaging continuity is poor and the work efficiency is low. At the same time, the vacuum chamber needs to be evacuated frequently and repeatedly, and the amount of air extracted each time is large, resulting in high energy consumption. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a continuous rolling vacuum packaging machine, the specific technical solution adopted by the present invention is: A continuous rolling vacuum packaging machine, comprising a conveyor belt, two conveyor rollers, multiple groups of packaging units and an air suction structure, wherein the conveyor belt is driven on the two conveyor rollers, and the multiple groups of packaging units are installed on the outer wall of the conveyor belt. When the conveyor rollers rotate, the conveyor belt circulates and transports the multiple groups of packaging units. The packaging unit comprises a vacuum box and a long cover, the vacuum box is fixed on the conveyor belt, the length direction of the vacuum box is perpendicular to the vertical direction of the conveyor belt, the vacuum box is provided with a first electric heating plate, the long cover is provided with a second electric heating plate, when the long cover is buckled on the vacuum box, the vacuum box and the long cover form a closed space, the first electric heating plate abuts against the second electric heating plate, and the vacuum box is connected with a suction hose; Wherein, the suction structure is connected to the suction hose and is used to extract the air inside the vacuum box.

[0006] Furthermore, first guide posts are provided at both ends of the vacuum box; Side plates are arranged on both sides of the conveyor belt, and the connecting line of the two side plates is perpendicular to the conveying direction of the conveyor belt. The conveying rollers are rotatably installed on the side plates. An annular groove is opened on each side plate, and the shape of the annular groove is consistent with the shape of the conveyor belt. The first guide column is slidably installed in the annular groove.

[0007] Further, the air intake structure includes an air guide cylinder inserted and fixed on a side plate, an air hole is opened on the circumferential outer wall of the air guide cylinder on one side of the side plate, a negative pressure pipe is connected to the end of the air guide cylinder, the end of the air guide cylinder on the other side of the side plate is open, and a buckle cover is installed on the sealing buckle of the opening, the buckle cover rotates on the air guide cylinder, a partition is arranged in the air guide cylinder, the partition extends to the buckle cover, the partition separates the space formed by the air guide cylinder and the buckle cover into a negative pressure space and a normal pressure space, the negative pressure space is connected to the negative pressure pipe, and the normal pressure space is connected to the air hole; The suction hose is connected and installed on the buckle cover, the first guide column is hollow inside, the first guide column is connected with the vacuum box, and the suction hose is connected with the first guide column.

[0008] Furthermore, a telescopic rod is arranged between the two side panels, one end of the telescopic rod is fixed on the buckle cover, and a slider is slidably arranged on the other end of the telescopic rod. A first guide column is rotatably inserted into the slider, and a baffle for limiting the slider is arranged on the telescopic rod. The slider is connected to the telescopic rod by a first spring sheet.

[0009] Further, a guide groove is provided on the side wall of the side plate, and the guide groove is a closed ring composed of a first arc groove, a second arc groove and two transition grooves. The shapes of the first arc groove and the second arc groove are consistent with the shape of the conveyor belt. The transition groove is used to connect the end of the first arc groove and the end of the second arc groove. A plurality of second guide posts are slidably arranged in the guide groove, and a movable sleeve is arranged on the second guide post. An insert plate is slidably inserted in the movable sleeve, and the insert plate is fixed on the vacuum box. The long cover is arranged between two movable sleeves on the vacuum box. When the second guide post slides in the first arc groove, the long cover is separated from the vacuum box. When the second guide post slides in the second arc groove, the long cover abuts against the vacuum box.

[0010] Furthermore, a vertical plate is vertically slidably arranged in the vacuum box, the first electric heating plate is fixed on the vertical plate, and the vertical plate and the vacuum box are connected via a plurality of second elastic sheets.

[0011] Furthermore, the two movable sleeves on the vacuum box are fixedly connected via a flat plate, a plurality of sliding posts are slidably inserted into the flat plate, the long cover is fixedly connected to the plurality of sliding posts, and the long cover is connected to the flat plate via a spring.

[0012] Furthermore, a motor is rolled on the outer wall of one of the side plates, a worm is arranged at the output end of the motor, two worm wheels are meshedly arranged on the worm, and the two worm wheels are respectively connected to the two conveying rollers in a driving manner.

[0013] The advantages of the present invention are: Through the design of continuous rotary motion, the continuity of the packaging process is achieved, the packaging cycle is significantly shortened, and thus the packaging efficiency is improved. Moreover, since the amount of air extracted during packaging is reduced, a vacuum environment can be quickly generated, so that the air in the packaging bag can be quickly discharged, the packaging time of the packaging bag can be shortened, and the energy consumption of vacuuming is reduced. Since the packaging bag is directly exposed to the air, the time and operation steps of reversely inflating the vacuum chamber to restore the normal pressure state in the traditional way are saved, the operation process is simplified, and the packaging speed is increased. Through these improvements, the new continuous rolling vacuum packaging machine not only improves the packaging efficiency, but also optimizes energy utilization, reduces operating costs, and also ensures the packaging quality and the stability of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 A schematic diagram of the structure from another perspective; Figure 3 yes Figure 2 A schematic diagram of the enlarged structure of the middle conveyor belt and multiple groups of packaging units thereon; Figure 4 yes Figure 1 A schematic diagram of the enlarged structure of the middle side panel; Figure 5 yes Figure 3 A schematic diagram of the enlarged structure of the middle packaging unit; Figure 6 yes Figure 5 Schematic diagram of the enlarged structure in cross-section and oblique view; Figure 7 yes Figure 4 A schematic diagram of the enlarged cross-sectional structure of the middle buckle cover; Figure 8 yes Figure 3 A schematic diagram of the enlarged structure of the middle buckle cover; Figure numerals: 1. conveyor belt; 2. conveyor roller; 3. packaging unit; 4. vacuum box; 5. long cover; 6. first electric heating plate; 7. second electric heating plate; 8. suction hose; 9. first guide column; 10. side plate; 11. annular groove; 12. air guide cylinder; 13. air hole; 14. negative pressure tube; 15. buckle cover; 16. partition; 17. telescopic rod; 18. slider; 19. first spring piece; 20. baffle; 21. first arc groove; 22. second arc groove; 23. transition groove; 24. second guide column; 25. movable sleeve; 26. plug plate; 27. vertical plate; 28. second spring piece; 29. ​​flat plate; 30. sliding column; 31. spring; 32. motor; 33. worm; 34. worm gear. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. This embodiment is written in a progressive manner.

[0019] like Figures 1 to 8 As shown, a continuous rolling vacuum packaging machine of the present invention comprises a conveyor belt 1, two conveyor rollers 2, multiple groups of packaging units 3 and an air suction structure. The conveyor belt 1 is driven and arranged on the two conveyor rollers 2, and the multiple groups of packaging units 3 are installed on the outer wall of the conveyor belt 1. When the conveyor rollers 2 rotate, the conveyor belt 1 cyclically transports the multiple groups of packaging units 3. The packaging unit 3 includes a vacuum box 4 and a long cover 5. The vacuum box 4 is fixed on the conveyor belt 1. The length direction of the vacuum box 4 is perpendicular to the vertical direction of the conveyor belt 1. The vacuum box 4 is provided with a first electric heating plate 6. The long cover 5 is provided with a second electric heating plate 7. When the long cover 5 is buckled on the vacuum box 4, the vacuum box 4 and the long cover 5 form a closed space. The first electric heating plate 6 is abutted against the second electric heating plate 7. The vacuum box 4 is connected with a suction hose 8. The suction structure is connected to the suction hose 8 and is used to extract the air inside the vacuum box 4.

[0020] In detail, two conveyor rollers 2 support the conveyor belt 1 so that the upper and lower surfaces of the conveyor belt 1 are horizontal. The conveyor belt 1 will drive multiple groups of packaging units 3 thereon to perform continuous rotational motion. The vacuum box 4 and the long cover 5 on the packaging unit 3 are distributed up and down and aligned with each other. The vacuum box 4 is arranged on the packaging unit 3, and the long cover 5 is used to buckle and seal the opening on the vacuum box 4. The first electric heating plate 6 and the second electric heating plate 7 are used to squeeze the bag mouth position of the packaging bag containing articles, and when the first electric heating plate 6 and the second electric heating plate 7 are energized, the first electric heating plate 6 and the second electric heating plate 7 heat up and heat-seal the packaging bag.

[0021] During the packaging work, the conveyor roller 2 rotates and drives the conveyor belt 1 to transport, and multiple groups of packaging units 3 move synchronously. When the packaging unit 3 moves to the loading position on the upper side of the conveyor belt 1, the long cover 5 is separated from the vacuum box 4. At this time, the packaging bag containing the items is placed on the conveyor belt 1, and the bag mouth is placed on the first electric heating plate 6. This work can be automatically completed by a mechanical arm or other mechanical structure. At this time, the conveyor belt 1 steadily supports the packaging bag, the long cover 5 moves down and is buckled on the vacuum box 4, the second electric heating plate 7 squeezes the packaging bag on the first electric heating plate 6, and the suction structure vacuums the box through the suction hose 8. The air in the vacuum box 4 and the long cover 5 is evacuated, and the air in the packaging bag enters the vacuum box 4 and the long cover 5 due to the external air pressure, thereby realizing the vacuuming of the packaging bag. After the packaging bag is vacuumed, the first electric heating plate 6 and the second electric heating plate 7 are energized and heat-seal the bag opening of the packaging bag, thereby realizing automatic packaging. At this time, the packaging bag moves to the lower side of the conveyor belt 1, and the long cover 5 is moved away from the vacuum box 4. The first electric heating plate 6 and the second electric heating plate 7 stop clamping the packaging bag, and the packaging bag automatically falls. With the continuous operation of the conveyor belt 1, an automatic and continuous packaging working mode can be realized.

[0022] Since the enclosed space formed by the vacuum box 4 and the long cover 5 is small, the amount of air that needs to be evacuated is small, so the air in the packaging bag can be quickly discharged, the speed of generating the vacuum environment is increased, and the work efficiency is improved. Compared with the traditional method, this case saves the working steps and time of reverse inflation into the vacuum chamber and simplifies the operation method.

[0023] Through the design of continuous rotary motion, the continuity of the packaging process is achieved, the packaging cycle is significantly shortened, and thus the packaging efficiency is improved. Moreover, since the amount of air extracted during packaging is reduced, a vacuum environment can be quickly generated, so that the air in the packaging bag can be quickly discharged, the packaging time of the packaging bag can be shortened, and the energy consumption of vacuuming is reduced. Since the packaging bag is directly exposed to the air, the time and operation steps of reversely inflating the vacuum chamber to restore the normal pressure state in the traditional way are saved, the operation process is simplified, and the packaging speed is increased. Through these improvements, the new continuous rolling vacuum packaging machine not only improves the packaging efficiency, but also optimizes energy utilization, reduces operating costs, and also ensures the packaging quality and the stability of the production line.

[0024] Furthermore, first guide posts 9 are provided at both ends of the vacuum box 4; Side plates 10 are provided on both sides of the conveyor belt 1. The line connecting the two side plates 10 is perpendicular to the conveying direction of the conveyor belt 1. The conveying rollers 2 are rotatably installed on the side plates 10. An annular groove 11 is opened on each side plate 10. The shape of the annular groove 11 is consistent with the shape of the conveyor belt 1. The first guide column 9 is slidably installed in the annular groove 11.

[0025] In detail, the side plate 10 can support the two conveying rollers 2. When the conveyor belt 1 drives the vacuum box 4 to move, the vacuum box 4 can drive the first guide column 9 to slide in the annular groove 11. Thus, the vacuum box 4 can be guided and supported by the side plate 10 and the annular groove 11, thereby improving the stability of the movement of the vacuum box 4.

[0026] Further, the air intake structure includes an air guide cylinder 12 inserted and fixed on a side plate 10, an air hole 13 is opened on the circumferential outer wall of the air guide cylinder 12 on one side of the side plate 10, and a negative pressure pipe 14 is connected to the end of the air guide cylinder 12, and the end of the air guide cylinder 12 on the other side of the side plate 10 is open, and a buckle cover 15 is installed on the opening in a sealing buckle, and the buckle cover 15 rotates on the air guide cylinder 12, and a partition 16 is arranged in the air guide cylinder 12, and the partition 16 extends to the buckle cover 15, and the partition 16 divides the space formed by the air guide cylinder 12 and the buckle cover 15 into a negative pressure space and a normal pressure space, and the negative pressure space is connected to the negative pressure pipe 14, and the normal pressure space is connected to the air hole 13; The suction hose 8 is connected and installed on the buckle cover 15 . The first guide column 9 is hollow inside. The first guide column 9 is connected to the vacuum box 4 . The suction hose 8 is connected to the first guide column 9 .

[0027] In detail, the buckle cover 15 moves synchronously with the conveyor belt 1. When the conveyor belt 1 moves one circle, the buckle cover 15 rotates one circle on the air guide tube 12, and the negative pressure tube 14 draws out the air in the negative pressure space. When the end of the suction hose 8 on the buckle cover 15 rotates to the negative pressure space, the negative pressure space can draw out the air in the vacuum box 4 and the long cover 5 through the suction hose 8 and the first guide column 9, thereby drawing out the air in the packaging bag. When the end of the suction hose 8 on the buckle cover 15 rotates to the normal pressure space following the buckle cover 15, the outside air can be replenished into the vacuum box 4 through the air hole 13, the normal pressure space, the suction hose 8 and the first guide column 9, thereby facilitating the restoration of the inside of the vacuum box 4 to the normal pressure state and facilitating the opening of the long cover 5. This process is carried out automatically, and the conveyor belt 1 maintains the conveying state.

[0028] Furthermore, a telescopic rod 17 is arranged between the two side panels 10, one end of the telescopic rod 17 is fixed on the buckle cover 15, and a slider 18 is slidably arranged on the other end of the telescopic rod 17. A first guide column 9 is rotatably inserted into the slider 18, and a baffle 20 for limiting the slider 18 is arranged on the telescopic rod 17. The slider 18 and the telescopic rod 17 are connected by a first spring plate 19.

[0029] In detail, the movable end of the telescopic rod 17 is fixed on the buckle cover 15, and the slider 18 is slidably installed on the outer wall of the fixed end of the telescopic rod 17. The first spring piece 19 is also installed on the fixed end of the telescopic rod 17, and the baffle 20 is installed on the fixed end of the telescopic rod 17. The first spring piece 19 provides an elastic force for the slider 18. When the first guide column 9 moves, the first guide column 9 can drive the buckle cover 15 to rotate on the air guide cylinder 12 through the slider 18 and the telescopic rod 17. Since the distance between the first guide column 9 and the buckle cover 15 changes, the telescopic rod 17 telescopes. When the telescopic rod 17 shrinks to the shortest distance, the first guide column 9 overcomes the force of the first spring piece 19 and makes the slider 18 slide on the fixed end of the telescopic rod 17, and the first spring piece 19 is elastically deformed, thereby further shortening the distance between the first guide column 9 and the buckle cover 15. This structural method and installation method can realize the connection and guiding function of a larger active range between the buckle cover 15 and the first guide column 9.

[0030] Further, a guide groove is provided on the side wall of the side plate 10, and the guide groove is a closed ring composed of a first arc groove 21, a second arc groove 22 and two transition grooves 23. The shapes of the first arc groove 21 and the second arc groove 22 are consistent with the shape of the conveyor belt 1. The transition groove 23 is used to connect the end of the first arc groove 21 and the end of the second arc groove 22. A plurality of second guide columns 24 are slidably arranged in the guide groove, and a movable sleeve 25 is arranged on the second guide column 24. A plug plate 26 is slidably inserted in the movable sleeve 25, and the plug plate 26 is fixed on the vacuum box 4; Among them, the long cover 5 is arranged between the two movable sleeves 25 on the vacuum box 4. When the second guide column 24 slides in the first arc groove 21, the long cover 5 is separated from the vacuum box 4. When the second guide column 24 slides in the second arc groove 22, the long cover 5 abuts against the vacuum box 4.

[0031] In detail, the vacuum box 4 can drive the long cover 5 to synchronously follow the movement of the conveyor belt 1 through two movable sleeves 25 and two plug plates 26. The movable sleeve 25 pushes the second guide column 24 to slide in the guide groove. When the second guide column 24 slides in the first arc groove 21, the long cover 5 is located away from the vacuum box 4. When the second guide column 24 passes through the transition groove 23 and slides into the second arc groove 22, the second guide column 24 pushes the movable sleeve 25 to move toward the vacuum box 4. The movable sleeve 25 slides on the plug plate 26, thereby pushing the long cover 5 and the second electric heating plate 7 thereon to move toward the vacuum box 4. The long cover 5 is closed compared to the vacuum box 4, thereby realizing automatic control of the positional relationship between the long cover 5 and the vacuum box 4.

[0032] Furthermore, a vertical plate 27 is vertically slidably provided in the vacuum box 4 , the first electric heating plate 6 is fixed on the vertical plate 27 , and the vertical plate 27 and the vacuum box 4 are connected via a plurality of second elastic sheets 28 .

[0033] In detail, a notch is provided on one side wall of the vacuum box 4, and the first electric heating plate 6 is located in the notch. When the second electric heating plate 7 squeezes the first electric heating plate 6, the first electric heating plate 6 and the second electric heating plate 7 jointly squeeze and fix the bag opening of the packaging bag. At this time, when the vacuum box 4 is evacuated, the air in the packaging bag can slightly expand the first electric heating plate 6 and the second electric heating plate 7 due to the pressure, that is, the first electric heating plate 6 and the vertical plate 27 move downward in the vacuum box 4, and the second spring piece 28 is elastically deformed. At this time, the air in the packaging bag enters the vacuum box 4, thereby realizing the vacuuming work, avoiding that when the first electric heating plate 6 and the second electric heating plate 7 are directly pressed against each other, the air in the packaging bag is not easy to be discharged and the vacuuming efficiency is affected.

[0034] Furthermore, the two movable sleeves 25 on the vacuum box 4 are fixedly connected by a flat plate 29 , a plurality of sliding posts 30 are slidably inserted on the flat plate 29 , the long cover 5 is fixedly connected to the plurality of sliding posts 30 , and the long cover 5 is connected to the flat plate 29 by a spring 31 .

[0035] In detail, the flat plate 29 and the sliding column 30 can guide and support the long cover 5. When the movable sleeve 25 approaches the vacuum box 4, the movable sleeve 25 drives the flat plate 29, the sliding column 30, the spring 31 and the long cover 5 to move toward the vacuum box 4. The long cover 5 and the vacuum box 4 are abutted. At this time, the movable sleeve 25 continues to move and uses the spring 31 to provide appropriate elastic pressure to the long cover 5.

[0036] With the above structure, the spring 31 can be used to buffer the long cover 5, so that the vacuum box 4 and the long cover 5 can be closely attached to each other, thereby reducing the requirements for the position accuracy of the guide groove and the second guide column 24.

[0037] Furthermore, a motor 32 is rolled on the outer wall of one of the side plates 10 , a worm 33 is provided at the output end of the motor 32 , two worm wheels 34 are meshedly provided on the worm 33 , and the two worm wheels 34 are respectively connected to the two conveying rollers 2 in driving connection.

[0038] In detail, the motor 32 can drive the two conveying rollers 2 to operate synchronously through the worm 33 and the two worm wheels 34, thereby driving the conveyor belt 1 to operate, and this method can improve the conveying stability of the conveyor belt 1.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A continuous rolling vacuum packaging machine, characterized in that: It includes a conveyor belt, two conveyor rollers, multiple groups of packaging units and an air suction structure. The conveyor belt transmission is arranged on the two conveyor rollers, and the multiple groups of packaging units are installed on the outer wall of the conveyor belt. When the conveyor rollers rotate, the conveyor belt circulates and transports the multiple groups of packaging units. The packaging unit comprises a vacuum box and a long cover, the vacuum box is fixed on the conveyor belt, the length direction of the vacuum box is perpendicular to the vertical direction of the conveyor belt, the vacuum box is provided with a first electric heating plate, the long cover is provided with a second electric heating plate, when the long cover is buckled on the vacuum box, the vacuum box and the long cover form a closed space, the first electric heating plate abuts against the second electric heating plate, and the vacuum box is connected with a suction hose; Wherein, the suction structure is connected to the suction hose and is used to extract the air inside the vacuum box.

2. The continuous rolling vacuum packaging machine according to claim 1, characterized in that: Both ends of the vacuum box are provided with first guide pillars; Side plates are arranged on both sides of the conveyor belt, and the connecting line of the two side plates is perpendicular to the conveying direction of the conveyor belt. The conveying rollers are rotatably installed on the side plates. An annular groove is opened on each side plate, and the shape of the annular groove is consistent with the shape of the conveyor belt. The first guide column is slidably installed in the annular groove.

3. The continuous rolling vacuum packaging machine according to claim 2, characterized in that: The air intake structure includes an air guide cylinder inserted and fixed on a side plate, an air hole is opened on the circumferential outer wall of the air guide cylinder on one side of the side plate, a negative pressure pipe is connected to the end of the air guide cylinder, the end of the air guide cylinder on the other side of the side plate is open, and a buckle cover is installed on the sealing buckle of the opening, the buckle cover rotates on the air guide cylinder, a partition is arranged in the air guide cylinder, the partition extends to the buckle cover, the partition separates the space formed by the air guide cylinder and the buckle cover into a negative pressure space and a normal pressure space, the negative pressure space is connected to the negative pressure pipe, and the normal pressure space is connected to the air hole; The suction hose is connected and installed on the buckle cover, the first guide column is hollow inside, the first guide column is connected with the vacuum box, and the suction hose is connected with the first guide column.

4. The continuous rolling vacuum packaging machine according to claim 3, characterized in that: A telescopic rod is arranged between the two side panels, one end of the telescopic rod is fixed on the buckle cover, a slider is slidably arranged on the other end of the telescopic rod, a first guide column is rotatably inserted into the slider, a baffle for limiting the slider is arranged on the telescopic rod, and the slider is connected to the telescopic rod by a first spring sheet.

5. The continuous rolling vacuum packaging machine according to claim 4, characterized in that: A guide groove is provided on the side wall of the side plate, and the guide groove is a closed ring consisting of a first arc groove, a second arc groove and two transition grooves. The shapes of the first arc groove and the second arc groove are consistent with the shape of the conveyor belt. The transition groove is used to connect the end of the first arc groove and the end of the second arc groove. A plurality of second guide posts are slidably arranged in the guide groove, and a moving sleeve is arranged on the second guide post. An insert plate is slidably inserted in the moving sleeve, and the insert plate is fixed on the vacuum box; The long cover is arranged between two movable sleeves on the vacuum box. When the second guide post slides in the first arc groove, the long cover is separated from the vacuum box. When the second guide post slides in the second arc groove, the long cover abuts against the vacuum box.

6. The continuous rolling vacuum packaging machine according to claim 5, characterized in that: A vertical plate is vertically slidably arranged in the vacuum box, the first electric heating plate is fixed on the vertical plate, and the vertical plate and the vacuum box are connected via a plurality of second elastic sheets.

7. The continuous rolling vacuum packaging machine according to claim 6, characterized in that: The two moving sleeves on the vacuum box are fixedly connected through a flat plate, a plurality of sliding columns are slidably inserted on the flat plate, the long cover is fixedly connected to the plurality of sliding columns, and the long cover is connected to the flat plate through a spring.

8. The continuous rolling vacuum packaging machine according to claim 7, characterized in that: A motor is rolled on the outer wall of one of the side plates, a worm is arranged at the output end of the motor, two worm wheels are meshedly arranged on the worm, and the two worm wheels are respectively connected to the two conveying rollers in a driving manner.

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