Automatic bagging machine for heavy pipes

Abstract

The utility model relates to an automatic bagging machine for heavy pipe, including two stands, the driving mechanism of four bagging units synchronous starting, drive four bagging gyro wheel synchronous rotation. Gyro wheel passes through the friction with plastic bag surface, and the plastic bag is continuously conveyed to the center direction of rectangular bagging station in coordination. The plastic bag is continuously conveyed, until the end of its sealing structure is transported to the center predetermined position of rectangular bagging station, bagging gyro wheel stops rotation, and the process of sending bag ends. At this time, the sealing end of plastic bag is accurately located in the subsequent pipe station. The pipe body of waiting bagging is pushed to the center of rectangular bagging station by external pipe body conveying equipment, and is against the sealing structure of plastic bag. Subsequently, the pipe body conveying equipment continues to convey the pipe body, and the pipe body props open the plastic bag from the guide plate in the process of advancing and makes it completely cover on the pipe body surface.

Description

Technical Field

[0001] This utility model relates to the field of pipe bagging technology, specifically to an automatic bagging machine for heavy pipes. Background Technology

[0002] In the field of pipe bagging technology, bagging pipes is a crucial step in many production processes, especially for heavy pipes, where its quality and efficiency directly impact subsequent processing and product protection. Traditional heavy pipe bagging methods rely heavily on manual operation, requiring workers to manually place plastic bags onto the pipes. This is not only labor-intensive and inefficient, but also prone to inconsistencies in bagging accuracy due to the randomness of manual operation, resulting in inconsistent bagging quality. Furthermore, manual bagging is insufficient for large-scale production demands that require rapid and efficient processes, thus affecting the overall production line's capacity. Therefore, there is an urgent need for an automated bagging machine suitable for heavy pipes. Utility Model Content

[0003] The main purpose of this utility model is to provide an automatic bagging machine for heavy pipes, so as to solve the problem that the manual operation in the existing technology is arbitrary, making it difficult to guarantee the accuracy and consistency of bagging, resulting in inconsistent bagging quality.

[0004] To achieve the above objectives, this utility model provides an automatic bagging machine for heavy pipes, comprising two uprights; Each frame has two bagging units arranged along its height direction; Four bagging units form a rectangular bagging station, with each bagging unit arranged along the diagonal of the rectangular bagging station. Each bagging unit includes a base frame, which is connected to an upright frame. A guide plate is fixed on one side of the base frame, and an inclined rail is fixed on the other side. The guide plate is arranged perpendicular to the diagonal of the rectangular bagging station. A sliding plate is installed on the inclined rail and is arranged along the diagonal of the rectangular bagging station. A bag-shaped roller is mounted on one end of the slide plate near the guide plate, and is connected to a drive mechanism for driving it to slide along the inclined rail. The bagging roller is connected to the drive mechanism that drives its rotation, and it contacts the guide plate through the drive mechanism.

[0005] Preferably, the upper bagging unit can be adjusted in height on the upright frame via a lifting component, and the base frame of the lower bagging unit is fixedly connected to the upright frame. The lifting components include an upper pulley, a lower pulley, and a first gearbox. The upper pulley is mounted on the top of the upright frame. The upright frame has a vertical slide along its height direction. A lifting block slides in the vertical slide. The base frame of the bagging unit located above is fixedly connected to the lifting block. The lower pulley is located in the middle and lower part of the upright and is located in the vertical slide. The upper pulley and the lower pulley are fitted with the first belt. The output end of the first gearbox is connected to the upper pulley and the output end is connected to the lifting motor. The base of the lifting motor is fixedly connected to the top of the upright. One side of the first belt is fixedly connected to the lifting block.

[0006] Preferably, the drive mechanism includes an inclined cylinder and a roller seat. The roller seat is fixedly connected to the slide plate, the bagging roller is rotatably mounted on the roller seat, the cylinder seat of the inclined cylinder is fixedly connected to the base frame, and the piston rod is fixedly connected to the roller seat.

[0007] Preferably, the driving mechanism includes a driving motor and a driving pulley; The drive pulley is fixedly connected to the bag-covering roller via a rotating rod, the motor base is fixedly connected to the slide plate, and the output shaft is fixedly fitted with an output pulley. The output pulley and the drive pulley are fitted with a second belt.

[0008] Preferably, the automatic bagging machine for heavy pipes also includes a moving mechanism, which includes a frame, two moving bases and a lead screw; Two horizontal rails are fixed side by side along the length of the top of the frame. Two movable bases are fixedly connected to two uprights, and the two correspond one to one. The bottom wall of the movable base has two movable blocks and nut seats. The two movable blocks correspond one to one with the two horizontal rails and slide on the horizontal rails. The lead screw is mounted on the top of the frame along the length of the horizontal rails and between the two horizontal rails. Two nut seats are screwed onto the lead screw. One end of the lead screw is connected to the horizontal motor, and the base of the horizontal motor is fixedly connected to the frame.

[0009] Preferably, an upper mold mechanism is provided upstream of the moving mechanism; The upper mold mechanism includes a main frame, which is placed on one side of the frame, and a shaft for the film roll to be fitted is detachably mounted on the side away from the frame. A membrane support is installed on the side of the main frame closest to the frame; The film support component includes two rotating shafts, a rectangular frame, and four film feeding rollers. Two rotating shafts are mounted on the main frame, and one end of each rotating shaft is connected to the second gearbox. The second gearbox is connected to the upper mold motor, and the base of the upper mold motor is fixedly connected to the main frame; The four film feeding roller sets are arranged in a rectangular shape. Each film feeding roller set includes a main roller and two auxiliary rollers. The main roller and the two auxiliary rollers are arranged in contact, and the axes of the three are arranged in an equilateral triangle. Two auxiliary wheels are arranged side by side at each of the four corners of the rectangular frame; Two main wheels are fixed on each shaft.

[0010] Preferably, a film-inverting rod is arranged between the film support member and the shaft, and both ends of the film-inverting rod are fixed to the main frame.

[0011] Preferably, the automatic bagging machine for heavy pipes also includes two heat sealing mechanisms; One heat sealing mechanism is located downstream of the upper mold mechanism and upstream of the moving mechanism, while the other heat sealing mechanism is located downstream of the moving mechanism. Each heat sealing mechanism includes a rectangular frame, two mounting plates and two second cylinders. Vertical slide rails are fixed to both height edges of the rectangular frame. The two ends of each horizontally mounted mounting plate are slidably mounted on the two vertical slide rails via two sliding blocks. Each mounting plate is fixed with a heat sealing plate, and the two second cylinders correspond one-to-one with the two mounting plates. The piston rod is fixedly connected to the mounting plate, and the cylinder seat of the second cylinder is fixedly connected to the rectangular frame. The two heat-sealing plates are arranged opposite each other.

[0012] The beneficial effects of the above scheme are: The open ends of the cylindrical plastic bags are respectively placed onto four guide plates, initially unfolding the bags and positioning them around the rectangular bagging station formed by the four bagging units. The other end of the plastic bag is the sealing structure. The drive mechanisms of the four bagging units start working, pushing their respective slides along inclined rails, causing the bagging rollers mounted on the slides to move inward, ultimately pressing the cylindrical plastic bag tightly against the respective target guide plates from four directions. The drive mechanisms of the four bagging units start synchronously, driving the four bagging rollers to rotate synchronously. Through friction with the surface of the plastic bag, the rollers work together to continuously convey the plastic bag towards the center of the rectangular bagging station. The plastic bag is continuously conveyed until its sealing structure at the end is conveyed to the predetermined position at the center of the rectangular bagging station, at which point the bagging rollers stop rotating, and the bag feeding process ends. At this time, the sealed end of the plastic bag is accurately located at the subsequent tube feeding station. An external tube conveying device pushes one end of the tube to be bagged to the center of the rectangular bagging station and abuts against the sealing structure of the plastic bag. Subsequently, the tube conveying device continues to transport the tube forward. As the tube advances, it expands the plastic bag from the guide plate and completely covers the surface of the tube. After bagging is complete, the drive mechanism moves the bagging roller back, releasing the grip on the plastic bag. The equipment returns to its initial state, ready for the next work cycle. Attached Figure Description

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the left-side structure of this utility model; Figure 3This is a three-dimensional structural diagram of the bagging unit of this utility model; Figure 4 This is a partial three-dimensional structural diagram of the bagging unit of this utility model; Figure 5 This is a three-dimensional structural diagram of the upper mold mechanism of this utility model.

[0015] Explanation of reference numerals in the attached figures 10. Stand; 11. Bagging Unit; 12. Bagging Station; 110. Base Frame; 111. Guide Plate; 112. Inclined Rail; 113. Slide Plate; 114. Bagging Roller; 115. Drive Mechanism; 116. Driving Mechanism; 13. Lifting Component; 131. Upper Pulley; 132. Lower Pulley; 133. First Gearbox; 100. Vertical Slide; 134. Lifting Block; 135. First Belt; 136. Lifting Motor; 1151. Inclined Cylinder; 1152. Roller Seat; 1161. Drive Motor; 1162. Drive Pulley; 1164. Output pulley; 1165. Second belt; 20. Moving mechanism; 21. Frame; 22. Moving base; 24. Horizontal rail; 30. Upper mold mechanism; 31. Main frame; 32. Shaft; 33. Film support component; 331. Rotating shaft; 332. Rectangular frame; 333. Film feeding wheel assembly; 334. Second gearbox; 335. Upper mold motor; 3331. Main wheel; 3332. Auxiliary wheel; 34. Film pouring rod; 40. Heat sealing mechanism; 41. Rectangular frame; 42. Mounting plate; 43. Second cylinder; 44. Vertical slide rail; 45. Heat sealing plate. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. Example

[0017] like Figures 1-5 As shown, this embodiment provides an automatic bagging machine for heavy pipes, including two uprights 10; each upright 10 has two bagging units 11 arranged along its height direction; as shown Figure 3As shown, four bagging units 11 form a rectangular bagging station 12, with each bagging unit 11 arranged along the diagonal of the rectangular bagging station 12. Each bagging unit 11 includes a base frame 110, which is connected to the upright frame 10. A guide plate 111 is fixed to one side of the base frame 110, and a sloping rail 112 is fixed to the other side of the base frame 110. The guide plate 111 is arranged perpendicular to the diagonal of the rectangular bagging station 12. A sliding plate 113 slides on the sloping rail 112, which is also arranged along the diagonal of the rectangular bagging station 12. Figure 4 As shown, a bagging roller 114 is rotatably mounted on one end of the slide plate 113 near the guide plate 111, and the slide plate 113 is connected to a drive mechanism 115 for driving it to slide along the inclined rail 112. The drive mechanism 115 includes an inclined cylinder 1151 and a roller seat 1152. The roller seat 1152 is fixedly connected to the slide plate 113, and the bagging roller 114 is rotatably mounted on the roller seat 1152. The cylinder seat of the inclined cylinder 1151 is fixedly connected to the base frame 110, and the piston rod of the inclined cylinder 1151 is fixedly connected to the roller seat 1152. The extension and retraction of the piston rod of the inclined cylinder 1151 causes the slide plate 113 to slide along the inclined rail 112, thereby driving the bagging roller 114 to move. The bagging roller 114 is connected to a drive mechanism 116 for driving its rotation, and the bagging roller 114 contacts the guide plate 111 through the drive mechanism 115. The driving mechanism 116 includes a driving motor 1161 and a driving pulley 1162. The driving pulley 1162 is fixedly connected to the bag-covering roller 114 via a rotating rod (not shown). The base of the driving motor 1161 is fixedly connected to the slide plate 113, and the output shaft of the driving motor 1161 is fixedly fitted with the output pulley 1164. A second belt 1165 is fitted between the output pulley 1164 and the driving pulley 1162. When the driving motor 1161 is started, it drives the output pulley 1164 to rotate. The output pulley 1164, through the second belt 1165, drives the driving pulley 1162 to rotate, which in turn drives the bag-covering roller 114 to rotate.

[0018] The open ends of the cylindrical plastic bags are respectively fitted onto four guide plates 111, allowing the plastic bags to initially unfold and be positioned around the rectangular bagging station 12 formed by the four bagging units 11. The other end of the plastic bag is sealed. The drive mechanisms 115 of the four bagging units 11 start working, pushing their respective slide plates 113 to move along the inclined rails 112, causing the bagging rollers 114 mounted on the slide plates 113 to move inward, ultimately pressing the cylindrical plastic bags tightly against the respective target guide plates 111 from four directions. The drive mechanisms 116 of the four bagging units 11 start synchronously, driving the four bagging rollers 114 to rotate synchronously. Through the friction between the rollers and the surface of the plastic bags, the rollers work together to continuously convey the plastic bags towards the center of the rectangular bagging station 12. The plastic bags are continuously conveyed until the sealing structure at their ends is conveyed to the predetermined center position of the rectangular bagging station 12, at which point the bagging rollers 114 stop rotating, and the bag feeding process ends. At this point, the sealed end of the plastic bag is accurately positioned at the subsequent pipe-feeding station. An external pipe-feeding conveyor pushes one end of the pipe to be bagged to the center of the rectangular bagging station 12, abutting against the sealing structure of the plastic bag. Subsequently, the conveyor continues to transport the pipe forward, pushing the plastic bag off the guide plate 111 and completely covering its surface. After bagging, this structural design further increases the efficiency of heavy pipe bagging and reduces labor costs.

[0019] like Figures 1-3 As shown, the upper bagging unit 11 can be adjusted in height on the upright frame 10 via the lifting member 13, and the base frame 110 of the lower bagging unit 11 is fixedly connected to the upright frame 10. The lifting member 13 includes an upper pulley 131, a lower pulley 132, and a first gearbox 133. The upper pulley 131 is rotatably mounted on the top of the upright frame 10. The upright frame 10 has a vertical slide rail 100 along its height direction, and a lifting block 134 slides within the vertical slide rail 100. The base frame 110 of the upper bagging unit 11 is fixedly connected to the lifting block 134. The lower pulley 132 is rotatably mounted in the lower middle part of the upright 10 and is located within the vertical slide rail 100. The upper pulley 131 and the lower pulley 132 are fitted with a first belt 135. The output end of the first gearbox 133 is connected to the upper pulley 131 for transmission, and the output end of the first gearbox 133 is connected to the lifting motor 136. The base of the lifting motor 136 is fixedly connected to the top of the upright 10. One side of the first belt 135 is fixedly connected to the lifting block 134.

[0020] Two lifting motors 136 operate synchronously, driving the upper pulley 131 to rotate, which in turn drives the first belt 135 to perform transmission action, and the lifting block 134 slides along the vertical slide rail 100. The two bagging units 11 located above can be adjusted to the same height on the upright frame 10 through the lifting component 13, so that the area of ​​the rectangular bagging station 12 can be increased or decreased. The larger the area of ​​the rectangular bagging station 12, the larger the diameter of the tubular plastic bag that can be used. With this mechanism, bagging operations can be performed on tubular plastic bags of different diameters.

[0021] like Figure 1 , Figure 2 As shown, the automatic bagging machine for heavy pipes also includes a moving mechanism 20, which includes a frame 21, two moving bases 22, and a lead screw (not shown). Two horizontal rails 24 are fixedly mounted side-by-side along the length of the top of the frame 21. The two moving bases 22 are fixedly connected to two uprights 10, and each corresponds to one of them. The bottom wall of each moving base 22 has two moving blocks (not shown) and nut seats (not shown). The two moving blocks correspond one-to-one with the two horizontal rails 24 and slide on the horizontal rails 24. The lead screw is mounted on the top of the frame 21 along the length of the horizontal rails 24, located between the two horizontal rails 24. Two nut seats are screwed onto the lead screw. One end of the lead screw is connected to a horizontal motor (not shown), and the base of the horizontal motor is fixedly connected to the frame 21. An upper mold mechanism 30 is provided upstream of the moving mechanism 20. Figure 5 As shown, the upper mold mechanism 30 includes a main frame 31, which is placed on one side of the frame 21. A shaft 32 for mounting the film roll is detachably mounted on the side of the main frame 31 away from the frame 21. A film support member 33 is provided on the side of the main frame 31 closest to the frame 21. The film support member 33 includes two rotating shafts 331, a rectangular frame 332, and four film feeding wheel sets 333. The two rotating shafts 331 are rotatably mounted on the main frame 31, and one end of each shaft 331 is connected to a second gearbox 334. The second gearbox 334 is connected to an upper mold motor 335, and the base of the upper mold motor 335 is fixedly connected to the main frame 31. The four film feeding wheel sets 333 are arranged in a rectangular shape. Each film feeding wheel set 333 includes a main wheel 3331 and two auxiliary wheels 3332. The main wheel 3331 and the two auxiliary wheels 3332 are arranged in contact, and their axes are arranged in an equilateral triangle. Two auxiliary wheels 3332 are arranged side-by-side at each of the four corners of the rectangular frame 332. Two main wheels 3331 are fixedly mounted on each rotating shaft 331. A film-turning rod 34 is arranged between the film support member 33 and the shaft 32, and both ends of the film-turning rod 34 are fixed to the main frame 31. Figure 1 , Figure 2As shown, the automatic bagging machine for heavy pipes also includes two heat-sealing mechanisms 40. One heat-sealing mechanism 40 is located downstream of the upper mold mechanism 30 and upstream of the moving mechanism 20, while the other heat-sealing mechanism 40 is located downstream of the moving mechanism 20. Each heat-sealing mechanism 40 includes a rectangular frame 41, two mounting plates 42, and two second cylinders 43. Vertical slide rails 44 are fixed to both height edges of the rectangular frame 41. The two ends of each horizontally arranged mounting plate 42 are slidably mounted on the two vertical slide rails 44 via two sliding blocks. A heat-sealing plate 45 is fixed to each mounting plate 42. The two second cylinders 43 correspond one-to-one with the two mounting plates 42, and the piston rod of the second cylinder 43 is fixedly connected to the mounting plate 42. The cylinder seat of the second cylinder 43 is fixedly connected to the rectangular frame 41. The two heat-sealing plates are arranged opposite each other.

[0022] The workflow of this embodiment is as follows: Based on the diameter of the cylindrical plastic bag to be bagged, the lifting motor 136 drives the lifting component 13 to work. The lifting motor 136 drives the upper pulley 131 to rotate, which, through the first belt 135, causes the lifting block 134 to slide along the vertical slide rail 100 of the stand 10, thereby adjusting the height of the upper bagging unit 11 on the stand 10 and changing the area of ​​the rectangular bagging station 12 to accommodate cylindrical plastic bags of different diameters. The film roll containing the plastic film is fitted onto the shaft 32, which is detachably mounted on the main frame 31, completing the film roll installation. The upper mold motor 335 operates, driving the two rotating shafts 331 to rotate through the second gearbox 334, and the main wheel 3331 on the rotating shaft 331 rotates accordingly. The main wheel 3331 contacts the two auxiliary wheels 3332 in the film feeding wheel group 333, driving the auxiliary wheels 3332 to rotate. The four film feeding wheel groups 333 work together to continuously feed the plastic film from the film roll. The plastic film passes through the inverting rod 34, which guides and stabilizes the plastic film, allowing it to smoothly enter subsequent processes. The rectangular frame 332 of the film support component 33 supports and shapes the plastic film, ensuring it remains flat and has a suitable shape during transport. The open ends of the cylindrical plastic bags formed by the initially transported plastic film are respectively placed on the four guide plates 111, allowing the plastic bags to be initially unfolded and positioned around the rectangular bagging station 12 formed by the four bagging units 11. The drive mechanism 115 of the four bagging units 11 then starts working, and the piston rod of the inclined cylinder 1151 extends and retracts, pushing the roller seat 1152, which in turn drives the slide plate 113 to move along the inclined rail 112, causing the bagging rollers 114 mounted on the slide plate 113 to move inward, ultimately pressing the cylindrical plastic bags tightly against the guide plates 111 from four directions. The driving mechanisms 116 of the four bagging units 11 start synchronously, driving the motor 1161 to rotate the output pulley 1164. The output pulley 1164 drives the drive pulley 1162 to rotate via the second belt 1165, which in turn drives the bagging roller 114 to rotate. The bagging roller 114, through friction with the surface of the plastic bag, continuously conveys the plastic bag towards the center of the rectangular bagging station 12. The plastic bag is continuously conveyed until it reaches a predetermined length, at which point the motor 1161 stops working, the bagging roller 114 stops rotating, and the bag feeding process ends. The heat sealing mechanism 40, located downstream of the upper mold mechanism 30 and upstream of the moving mechanism 20, begins to work. The piston rod of the second cylinder 43 extends, pushing the mounting plate 42 down the vertical slide rail 44, causing the two heat sealing plates 45 to approach each other and press the plastic bag, heat sealing it and cutting the plastic bag. The heat sealing plates 45 in this invention adopt existing technology, so they will not be described in detail. A sealing structure is formed at the bottom of the cylindrical plastic bag. After heat sealing is completed, the piston rod of the second cylinder 43 retracts, and the mounting plate 42 drives the heat sealing plate 45 to rise and reset. The horizontal motor then operates, driving the lead screw to rotate.Since the two nut seats are screwed onto the lead screw, and the movable base 22 is slidably mounted on the horizontal rail 24 via the moving block, the rotation of the lead screw causes the two nut seats to move along the horizontal rail 24, thereby driving the movable base 22 and the upright frame 10 to move. This moves the two upright frames 10 to one side of another heat-sealing mechanism 40, where an external tube conveying device pushes one end of the tube to be bagged to the center of the rectangular bagging station 12, abutting against the sealing structure of the plastic bag. The external tube conveying device uses existing technology and will not be described in detail here. This tube conveying device continues to transport the tube forward, during which the tube opens the plastic bag from the guide plate 111 and completely covers the tube surface. The heat-sealing mechanism 40, located downstream of the moving mechanism 20, heat-seals the opening of the plastic bag. This structure achieves automated bagging of heavy tubes.

[0023] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. An automatic bagging machine for heavy pipes, characterized in that, Includes two uprights; Each of the uprights is arranged with two bagging units along its height direction; The four bagging units form a rectangular bagging station, and each bagging unit is arranged along the diagonal of the rectangular bagging station; Each of the bagging units includes a base frame, which is connected to the upright frame; A guide plate is fixed on one side of the base frame, and an inclined rail is fixed on the other side; The guide plate is arranged perpendicular to the diagonal of the rectangular bagging station. A sliding plate is mounted on the inclined rail and is arranged along the diagonal of the rectangular bagging station. The slide plate is equipped with a bag-shaped roller at one end near the guide plate and is connected to a drive mechanism for driving it to slide along the inclined rail. The bagging roller is connected to a drive mechanism for rotating it, and can contact the guide plate through the drive mechanism.

2. The automatic bagging machine for heavy pipes according to claim 1, characterized in that, The bagging unit located at the top can be adjusted in height on the upright frame via a lifting component, and the base frame of the bagging unit located at the bottom is fixedly connected to the upright frame; The lifting component includes an upper pulley, a lower pulley, and a first gearbox. The upper pulley is rotatably mounted on the top of the upright frame. The upright frame has a vertical slide along its height direction. A lifting block slides in the vertical slide. The base frame of the bagging unit located above is fixedly connected to the lifting block. The lower pulley is rotated in the lower middle part of the upright and located in the vertical slide. The upper pulley and the lower pulley are fitted with a first belt. The output end of the first gearbox is driven by the upper pulley and the output end is driven by the lifting motor. The base of the lifting motor is fixedly connected to the top of the upright. One side of the first belt is fixedly connected to the lifting block.

3. The automatic bagging machine for heavy pipes according to claim 1, characterized in that, The driving mechanism includes an inclined cylinder and a roller seat. The roller seat is fixedly connected to the slide plate. The bagging roller is rotatably mounted on the roller seat. The cylinder seat of the inclined cylinder is fixedly connected to the base frame, and the piston rod is fixedly connected to the roller seat.

4. The automatic bagging machine for heavy pipes according to claim 2, characterized in that, The driving mechanism includes a driving motor and a driving pulley; The drive pulley is fixedly connected to the bag-covering roller via a rotating rod. The base of the drive motor is fixedly connected to the slide plate, and the output shaft is fixedly fitted with an output pulley. A second belt is fitted onto the output pulley and the drive pulley.

5. The automatic bagging machine for heavy pipes according to claim 1, characterized in that, It also includes a moving mechanism, which comprises a frame, two moving bases and a lead screw; Two horizontal rails are fixed side by side along the length of the top of the frame. The two movable bases are fixedly connected to the two uprights and correspond one-to-one. The bottom wall of the movable base has two movable blocks and a nut seat. The two movable blocks correspond one-to-one with the two horizontal rails and slide on the horizontal rails. The lead screw is mounted on the top of the frame along the length of the horizontal rail and is located between the two horizontal rails. The two nut seats are screwed onto the lead screw. One end of the lead screw is connected to a horizontal motor, and the base of the horizontal motor is fixedly connected to the frame.

6. The automatic bagging machine for heavy pipes according to claim 5, characterized in that, An upper mold mechanism is provided upstream of the moving mechanism; The upper mold mechanism includes a main frame, which is placed on one side of the frame, and a shaft for the film roll to be sleeved is detachably mounted on the side away from the frame. A membrane support is provided on the side of the main frame near the frame; The film support component includes two rotating shafts, a rectangular frame, and four film feeding rollers. The two rotating shafts are rotatably mounted on the main frame, and one end of each rotating shaft is connected to the second gearbox. The second gearbox is connected to the upper mold motor, and the base of the upper mold motor is fixedly connected to the main frame; The four film feeding roller sets are arranged in a rectangular shape. Each film feeding roller set includes a main roller and two auxiliary rollers. The main roller and the two auxiliary rollers are arranged in contact, and the axes of the three rollers are arranged in an equilateral triangle. Two auxiliary wheels are arranged side by side at each of the four corners of the rectangular frame; Two main wheels are fixedly mounted on each of the said shafts.

7. The automatic bagging machine for heavy pipes according to claim 6, characterized in that, A film-turning rod is arranged between the film support member and the shaft, and both ends of the film-turning rod are fixed to the main frame.

8. The automatic bagging machine for heavy pipes according to claim 6, characterized in that, It also includes two heat-sealing mechanisms; One of the heat sealing mechanisms is located downstream of the upper mold mechanism and upstream of the moving mechanism, while the other heat sealing mechanism is located downstream of the moving mechanism. Each of the heat sealing mechanisms includes a rectangular frame, two mounting plates and two second cylinders. Vertical slide rails are fixed to both height edges of the rectangular frame. The two ends of each horizontally arranged mounting plate are slidably mounted on the two vertical slide rails via two sliding blocks. A heat-sealing plate is fixed on each of the mounting plates, and the two second cylinders correspond one-to-one with the two mounting plates. The piston rod is fixedly connected to the mounting plate, and the cylinder seat of the second cylinder is fixedly connected to the rectangular frame. The two heat-sealing plates are arranged opposite each other.

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