An agricultural product packaging apparatus

Abstract

The present application relates to the technical field of agricultural product packaging, in particular to an agricultural product packaging device, which comprises a sealing box, the upper surface of one end of the sealing box is in an open structure, a feeding belt is arranged in the sealing box, the outer ring surface of the feeding belt is in a recessed structure, two conveying wheels are in transmission connection with the inner ring side of the feeding belt, and a support frame rod is installed in the sealing box. The present application can make the packaging bag between two inner sealing heating plates, between the outer sealing heating plate and the adjacent inner sealing heating plate, and between the movable hot pressing rod and the fixed hot pressing rod, form twice heat plastic sealing between the inner sealing heating plates and the outer sealing heating plate and the adjacent inner sealing heating plate, and heat plastic connection of the bag opening of the packaging bag on both sides of the bag opening blocking rod by the movable hot pressing rod and the fixed hot pressing rod, so as to form a ring structure between the two heat plastic positions of the packaging bag, which is convenient for taking and transferring the packaging bag in the later stage.

Description

Technical Field

[0001] This invention relates to the technical field of agricultural product packaging, and in particular to an agricultural product packaging device. Background Technology

[0002] Agricultural product packaging refers to the use of containers or materials to protect and decorate agricultural products or processed agricultural products that are about to enter or have already entered the distribution field. Agricultural product packaging is an important condition for the circulation of agricultural products. If agricultural products such as grains, meat, eggs, fruits, and tea cannot be transported and stored during the circulation process, the packaging bags will be sealed. Currently, when packaging agricultural products, heat sealing is generally used to seal the opening of the packaging bag.

[0003] Chinese Patent Publication No. CN212829468U discloses a hot-melt sealing device for agricultural product packaging, including a plastic shell base disposed on the upper surface of a workbench. A hot-melt heating wire is disposed on the upper surface of the plastic shell base, and a pressure arm is hinged to the upper surface of the plastic shell base. A silicone pressure strip is installed on the lower surface of the pressure arm, and a handle is disposed on the upper surface of the pressure arm. A cleaning component is disposed behind the plastic shell base on the upper surface of the workbench, and a pressing component is slidably mounted on the upper surface of the workbench in front of the plastic shell base. By setting up cleaning components, the exterior of the packaging bag can be effectively cleaned, ensuring the cleanliness of the packaging bag and preventing contamination from affecting the heat-sealing effect. By setting up pressing components, the neatness of the packaging bag can be ensured, preventing wrinkles from affecting the sealing effect. However, the above-mentioned related technologies have the following drawbacks: when sealing the packaging bag, the sealing device generally only forms a sealing mark on the packaging bag, which has a low error tolerance. When the packaging bag with a single sealing mark is opened, the inside will be connected to the outside. In addition, the opening of the sealed plastic bag is smooth, making it inconvenient to pick up the plastic bag. Therefore, an agricultural product packaging device is proposed. Summary of the Invention

[0004] In order to ensure that the opening of the plastic bag is sealed multiple times and that the sealed packaging bag is easy to handle, the present invention provides an agricultural product packaging device.

[0005] This invention provides an agricultural product packaging device, employing the following technical solution: It includes a sealing box, one end of which has an open upper surface. A feeding belt is installed inside the sealing box, with a recessed outer ring. Two conveyor wheels are driven to the inner ring of the feeding belt. A support frame is installed inside the sealing box, and an intermittent control motor A is mounted on one side of the support frame. The output end of the intermittent control motor A is coaxially connected to one of the conveyor wheels. Two bag opening stops are positioned above the feeding belt. The two bag opening stops are fixed to the support frame on opposite sides. Both bag opening stops are located above the feeding belt. An inner sealing heating plate is installed below the open end of the two bag opening stops away from the sealing box. The inner sealing heating plate is located above the feeding belt. A sleeve is installed at the lower end of the two inner sealing heating plates. Two bent rods are fixed to the bottom surface of the inner sealing heating plate. The upper end of the sleeve slides onto the outer surface of the adjacent bent rod. The bent rod is elastically connected to the connected sleeve. The lower end of the sleeve is fixed to the support frame. The inner sealing heating plate is elastically connected to the support frame.

[0006] An intermittent power transmission structure is installed above the feeding belt. This structure is located on the side of the bag opening stop away from the opening of the sealing box. A central rod is installed above the feeding belt, with external sealing heating plates on both its front and rear sides. Both external sealing heating plates are elastically connected to the central rod. The central rod is located on the side of the intermittent power transmission structure closest to the opening of the sealing box. A track frame is provided between the central rod and the intermittent power transmission structure. A shaft is fixed to one end of the central rod near the track frame, and the shaft is slidably inserted into the track frame. The shaft is connected to the intermittent power transmission structure... The transmission structure is connected, the track frame is fixed to the support frame, and two movable hot-pressing rods slide through the upper end of the middle rod on both the front and back. The movable hot-pressing rods are elastically connected to the middle rod. The movable hot-pressing rods on both sides of the middle rod are staggered. A horizontal and vertical limiting structure is installed on the upper surface of the shaft. The other end of the horizontal and vertical limiting structure is fixed to the sealing box. The movable hot-pressing rods are located above the outer sealing heating plate. Two fixed hot-pressing rods are set above each inner sealing heating plate. The upper end of the fixed hot-pressing rods is fixed to the adjacent bag mouth stop bar. The four fixed hot-pressing rods are coaxially set with the four movable hot-pressing rods respectively.

[0007] Optionally, the intermittent power transmission structure includes a notched arc frame and a radial rod. The arc surface of the notched arc frame has an arc groove. The radial rod is slidably inserted into the arc groove. A notched bevel gear ring is coaxially mounted on the side of the notched arc frame away from the track frame. An intermittent control motor B is fixed to the end of the radial rod away from the axis of the notched arc frame. A bevel gear meshes with the outer ring side of the notched bevel gear ring. The bevel gear is fixedly sleeved on the output end of the intermittent control motor B. A sliding groove is opened at the end of the radial rod located on the inner ring side of the notched arc frame. A movable block is slidably inserted into the sliding groove. The movable block is rotatably sleeved on the outer surface of the shaft. The movable block is elastically connected to the radial rod.

[0008] Optionally, the upper end of the trajectory frame is arc-shaped, the lower two sides of the trajectory frame are horizontal, and the arc end of the trajectory frame is coaxially arranged with the arc frame of the notch.

[0009] Optionally, the horizontal and vertical limiting structure includes a vertical telescopic rod and a horizontal rod. The lower end of the vertical telescopic rod is fixed to the upper surface of the shaft, the upper end of the vertical telescopic rod is slidably sleeved on the outer surface of the shaft, and both ends of the horizontal rod are fixed to the sealing box.

[0010] Optionally, the two bag opening stops are symmetrically distributed front and back around the center section of the feeding belt, with the left ends of the two bag opening stops being flared and the right ends of the two bag opening stops being round rods.

[0011] Optionally, the concave structure of the feeding belt has an air jet frame in sliding contact. The left end of the air jet frame is fixed to the left inner wall of the sealing box, and the right end of the air jet frame is U-shaped. An air pump is fixedly inserted through the left side of the sealing box, and the air outlet of the air pump is fixedly connected to the left end of the air jet frame.

[0012] Optionally, two limiting plates are fixedly inserted inside the open structure of the sealing box. The lower part of the two limiting plates is located between the two bag mouth stops, and the lower end of the two limiting plates is located inside the recessed structure of the feeding belt.

[0013] Optionally, the left and right ends of the outer sealing heating plate are fixed with side plates, and the middle rod is located between the four side plates, with the side plates and the middle rod in sliding contact.

[0014] Optionally, the axis of the radial rod intersects perpendicularly with the axis of the notched arc frame, and the maximum longitudinal distance between the movable hot-pressing rods on the front and rear sides of the middle rod is greater than the maximum distance between the two outer sealing heating plates.

[0015] In summary, the present invention has the following beneficial technical effects: This invention utilizes components such as bag opening stops, inner sealing heating plates, outer sealing heating plates, movable heat-pressing rods, and fixed heat-pressing rods. A shaft controls a central rod to move from the upper ends of the two bag opening stops to one side, pushing the bag opening of the packaging bag so that the other end of the bag opening stop is positioned between the adjacent inner and outer sealing heating plates. As the shaft continues to move, within the constraints of the trajectory frame, it first pushes one side of the movable heat-pressing rod closer to the bag opening, causing the movable and fixed heat-pressing rods to press the bag opening firmly. Then, as the central rod continues to move towards the packaging bag... This process ensures that there are packaging bags between the two inner sealing heating plates, between the outer sealing heating plate and the adjacent inner sealing heating plate, and between the movable and fixed heat pressing rods. Then, the inner sealing heating plate, outer sealing heating plate, movable heat pressing rod, and fixed heat pressing rod are activated to perform thermoforming, forming two thermoforming seals between the inner sealing heating plates and between the outer sealing heating plate and the adjacent inner sealing heating plate. At the same time, the movable and fixed heat pressing rods thermoform the bag openings on both sides of the bag opening baffle, forming a ring-shaped structure between the two thermoforming positions of the packaging bag, which facilitates the subsequent handling and transfer of the packaging bag.

[0016] This invention uses a jetting frame and an air pump. The air pump supplies air to the jetting frame, which then sprays air upwards. This prevents the bag opening from bending under the influence of the airflow, ensuring that the bag opening accurately enters between the two bag opening stops. This facilitates the subsequent movement of the outer sealing heating plate, which pushes the bag opening to one side of the two bag opening stops.

[0017] This invention, by setting up a notched bevel gear ring, a radial rod, a movable block, and a notched arc frame, controls the bevel gear to mesh with the notched bevel gear ring each time the intermittent control motor B starts, driving the radial rod to move from one end of the notched arc frame to the other end. When the radial rod drives the shaft to rotate synchronously around the axis of the notched arc frame through the movable block, the shaft drives the movable block to slide in the groove under the limitation of the trajectory frame, so that the radial rod can swing back and forth, causing the openings of two adjacent packaging bags to swing to both sides respectively. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the sealing box in an embodiment of the present invention; Figure 3 This is a top view schematic diagram of some structures in an embodiment of the present invention; Figure 4 This is a right-side view of a portion of the structure in an embodiment of the present invention; Figure 5 This is a schematic diagram of the connection between the air pump and the jet frame in an embodiment of the present invention; Figure 6 This is a schematic diagram of the connection between the radial rod and the movable block in an embodiment of the present invention; Figure 7 This is a schematic diagram of the connection between the outer sealing heating plate and the intermediate rod in an embodiment of the present invention; Figure 8 This is a schematic diagram of the sealing position of the packaging bag in an embodiment of the present invention; Figure 9 This is a schematic diagram of the agricultural product packaging process in an embodiment of the present invention.

[0019] Reference numerals: 1. Sealing box; 2. Feeding belt; 3. Conveyor wheel; 4. Support frame; 5. Bag mouth stop bar; 6. Intermittent power transmission structure; 61. Notched arc frame; 62. Radial rod; 63. Arc groove; 64. Notched bevel gear ring; 65. Intermittent control motor B; 66. Bevel gear; 67. Movable block; 68. Slide groove; 7. Horizontal and vertical limiting structure; 71. Vertical telescopic rod; 72. Horizontal rod; 8. Intermittent control motor A; 9. Inner sealing heating plate; 10. Sleeve frame; 11. Bent rod; 12. Intermediate rod; 13. Track frame; 14. Shaft rod; 15. Movable hot pressing rod; 16. Outer sealing heating plate; 17. Fixed hot pressing rod; 18. Air jet frame; 19. Air pump; 20. Material limiting plate; 21. Side plate. Detailed Implementation

[0020] The following is in conjunction with the appendix Figures 1-9 The present invention will be described in further detail below.

[0021] This invention discloses an agricultural product packaging device. For example... Figures 1-9 As shown, the device includes a sealing box 1, with one end of its upper surface being open. A feeding belt 2 is installed inside the sealing box 1, with its outer ring surface being recessed. Two limiting plates 20 are fixedly inserted into the open structure of the sealing box 1, with the lower ends of the two limiting plates 20 located between two bag opening stops 5. Two conveying wheels 3 are connected to the inner ring side of the feeding belt 2. A support frame 4 is installed inside the sealing box 1, with an intermittent control motor A8 mounted on one side of the support frame 4. The output end of the intermittent control motor A8 is coaxially connected to one of the conveying wheels 3. The notch-shaped structure of the sealing box 1 is connected to an agricultural product bagging device, which is connected to a feeding device and an agricultural product identification module. The other end of the sealing box 1 is connected to a conveying structure for unloading. The conveying structure transports the sealed packaging bags to a palletizing device for palletizing.

[0022] Two bag opening stops 5 are provided above the feeding belt 2. The limiting plate 20 allows the falling packaging bags to fall into the concave structure of the feeding belt 2 and between the two bag opening stops 5. The sides of the two bag opening stops 5 that are far apart from each other are fixed to the support frame 4. The two bag opening stops 5 are located above the feeding belt 2. The two bag opening stops 5 are symmetrically distributed front and back with respect to the central cross section of the feeding belt 2. The left ends of the two bag opening stops 5 are flared, and the right ends of the two bag opening stops 5 are round rods.

[0023] The concave structure of the feeding belt 2 has an air jet frame 18 that slides in contact with it. The left end of the air jet frame 18 is fixed to the left inner wall of the sealing box 1, and the right end of the air jet frame 18 is U-shaped. An air pump 19 is fixedly inserted through the left side of the sealing box 1. The air outlet of the air pump 19 is fixedly connected to the left end of the air jet frame 18. The airflow sprayed upward from the air jet frame 18 causes the bag opening of the packaging bag to enter vertically upward between the two bag opening baffles 5 under the action of the airflow.

[0024] Two bag opening stop bars 5 are each provided with an inner sealing heating plate 9 below the end of the opening structure away from the sealing box 1. The inner sealing heating plate 9 is located above the feeding belt 2. The lower end of the two inner sealing heating plates 9 is provided with a sleeve 10. Two bent rods 11 are fixed on the bottom surface of the inner sealing heating plate 9. The upper end of the sleeve 10 is slidably sleeved on the outer surface of the adjacent bent rod 11. The bent rod 11 is elastically connected to the connected sleeve 10. The lower end of the sleeve 10 is fixed to the support frame 4. The inner sealing heating plate 9 is elastically connected to the support frame 4.

[0025] An intermittent power transmission structure 6 is provided above the feeding belt 2. The intermittent power transmission structure 6 is located on the side of the bag mouth stop bar 5 away from the open structure of the sealing box 1. An intermediate rod 12 is provided above the feeding belt 2. An outer sealing heating plate 16 is provided on both the front and rear sides of the intermediate rod 12. Both outer sealing heating plates 16 are elastically connected to the intermediate rod 12. Side plates 21 are fixed at both ends of the outer sealing heating plates 16. The intermediate rod 12 is located between the four side plates 21. The side plates 21 are in sliding contact with the intermediate rod 12. The side plates 21 prevent the outer sealing heating plates 16 from twisting when they move relative to the intermediate rod 12. The intermediate rod 12 is located on the side of the intermittent power transmission structure 6 close to the open structure of the sealing box 1. A track frame 13 is provided between the intermediate rod 12 and the intermittent power transmission structure 6. A shaft 14 is fixed at one end of the intermediate rod 12 close to the track frame 13. The shaft 14 is slidably inserted into the inside of the track frame 13. The shaft 14 is connected to the intermittent power transmission structure 6. The track frame 13 is fixed to the support frame 4.

[0026] The intermittent power transmission structure 6 includes a notched arc frame 61 and a radial rod 62. The arc surface of the notched arc frame 61 has an arc groove 63. The radial rod 62 is slidably inserted into the arc groove 63. A notched bevel gear ring 64 is coaxially mounted on the side of the notched arc frame 61 away from the track frame 13. An intermittent control motor B65 is fixed to one end of the radial rod 62 away from the axis of the notched arc frame 61. A bevel gear 66 meshes with the outer ring side of the notched bevel gear ring 64 and is fixedly sleeved on the output end of the intermittent control motor B65. A sliding groove 68 is provided at one end of the radial rod 62 located on the inner ring side of the notched arc frame 61. A movable block 67 is slidably inserted into the sliding groove 68 and rotatably sleeved on the shaft. On the outer surface of 14, the movable block 67 is elastically connected to the radial rod 62. When the intermittent control motor A8 stops, the intermittent control motor B65 rotates, controlling the bevel gear 66 to mesh with the notched bevel gear ring 64 to drive the radial rod 62 from one end of the notched arc frame 61 to the other end. The intermittent control motor A8 and the intermittent control motor B65 start intermittently. The upper end of the track frame 13 is arc-shaped, and the lower two sides of the track frame 13 are horizontal. The arc end of the track frame 13 is coaxially set with the notched arc frame 61. The shaft 14 moves within the track frame 13 to drive the intermediate rod 12 and the outer sealing heating plate 16 to move horizontally when they are located at the bag opening stop bar 5, and to move in an arc trajectory when they are above the bag opening stop bar 5.

[0027] Two movable hot-pressing rods 15 slide through the upper end of the middle rod 12 on both the front and back sides. The movable hot-pressing rods 15 are elastically connected to the middle rod 12. The movable hot-pressing rods 15 on both sides of the middle rod 12 are staggered. A horizontal and vertical limiting structure 7 is installed on the upper surface of the shaft 14. The other end of the horizontal and vertical limiting structure 7 is fixed to the sealing box 1. The horizontal and vertical limiting structure 7 includes a vertical telescopic rod 71 and a horizontal rod 72. The lower end of the vertical telescopic rod 71 is fixed to the upper surface of the shaft 14, and the upper end of the vertical telescopic rod 71 is slidably sleeved on the outer surface of the shaft 14. The two ends of the horizontal rod 72 are fixed to the sealing box 1. When the shaft 14 moves along the trajectory inside the track frame 13, it drives the vertical telescopic rod 71 to extend and retract, and at the same time drives the vertical telescopic rod 71 to slide on the horizontal rod 72, so that the middle rod 12 will not twist when it moves, and the two outer sealing heating plates 16 and the middle rod 12 are always in the same plane. The movable hot-pressing rods 15 are located above the outer sealing heating plates 16.

[0028] Two fixed heat-pressing rods 17 are provided above each inner sealing heating plate 9. The upper end of the fixed heat-pressing rod 17 is fixed to the adjacent bag opening stop bar 5. The four fixed heat-pressing rods 17 are respectively coaxially arranged with the four movable heat-pressing rods 15. The axis of the radial rod 62 intersects perpendicularly with the axis of the notch arc frame 61. When the middle rod 12 rotates to the two sides of the two bag opening stop bars 5, the two movable heat-pressing rods 15 on one side of the middle rod 12 are respectively coaxial with the corresponding fixed heat-pressing rods 17. Thus, when the movable heat-pressing rods 15 move, they can push the bag opening of the packaging bag to deform and bend from below the fixed heat-pressing rod 17 on the adjacent side and move to contact the corresponding fixed heat-pressing rod 17 on the other side.

[0029] The maximum longitudinal distance between the movable hot-pressing rods 15 on both sides of the middle rod 12 is greater than the maximum distance between the two outer sealing heating plates 16. When the middle rod 12 moves towards the axis of the notch arc frame 61, the middle rod 12 first drives the movable hot-pressing rod 15 to contact the bag opening of the packaging bag. Then, as the movable hot-pressing rod 15 continues to move, it pushes the bag opening of the packaging bag to contact the fixed hot-pressing rod 17 on the other side. Then, as the middle rod 12 continues to move, the outer sealing heating plate 16 pushes the bag opening of the packaging bag to contact the adjacent inner sealing heating plate 9 first. As it continues to move, it pulls the corresponding bent rod 11 to move elastically relative to the sleeve 10, pushing the bag opening between the two bag opening stops 5 of the packaging bag towards the inner sealing plate on the other side. As the hot plate 9 moves, it contacts the bag opening between the two inner sealing heating plates 9, between the outer sealing heating plate 16 and the adjacent inner sealing heating plate 9, and between the movable hot pressing rod 15 and the fixed hot pressing rod 17. Then, the inner sealing heating plate 9, the outer sealing heating plate 16, the movable hot pressing rod 15, and the fixed hot pressing rod 17 are activated to heat-seal the contacted packaging bag. Two heat-sealing seals are formed between the inner sealing heating plates 9 and between the outer sealing heating plate 16 and the adjacent inner sealing heating plate 9. At the same time, the movable hot pressing rod 15 and the fixed hot pressing rod 17 heat-seal the bag openings on both sides of the bag opening stop bar 5, forming a ring-shaped structure between the two heat-sealing positions of the packaging bag, which facilitates the subsequent handling and transfer of the packaging bag.

[0030] The working principle is as follows: Packaging bags containing agricultural products fall from the opening of the sealing box 1 above the feeding belt 2 inside the sealing box 1. The intermittent control motor A8 drives the feeding belt 2 to rotate intermittently via the connected conveyor wheel 3, conveying the packaging bags. The feeding belt 2 transports the packaging bags between the two inner sealing heating plates 9. When the intermittent control motor A8 stops, the intermittent control motor B65 rotates, controlling the bevel gear 66 to mesh with the notched bevel gear ring 64, driving the radial rod 62 from one end of the notched arc frame 61 to the other. When the radial rod 62 drives the shaft 14 to rotate synchronously around the axis of the notched arc frame 61 via the movable block 67, the shaft 14... Under the constraint of the trajectory frame 13, the movable block 67 slides within the slide groove 68, allowing the radial rod 62 to reciprocate. Then, the shaft 14 controls the intermediate rod 12 to move from the upper end of the two bag opening stops 5 to one side of the two bag opening stops 5. When the shaft 14 moves, it drives the vertical telescopic rod 71 to extend and retract while sliding on the horizontal rod 72, ensuring that the intermediate rod 12 does not rotate. This keeps the inner sealing heating plate 9 and the outer sealing heating plate 16 parallel, pushing the bag opening above the two bag opening stops 5 to bend around one of the bag opening stops 5. The bag bends to the other end of the bag opening stop 5, which is located between the adjacent inner sealing heating plate 9 and outer sealing heating plate. Between 16, and then as the shaft 14 continues to move, it moves horizontally under the constraint of the trajectory frame 13. First, it pushes the movable hot pressing rod 15 on one side closer to the bag opening. Under the push of the movable hot pressing rod 15, the bag opening moves closer to the corresponding fixed hot pressing rod 17 on the other side, so that the movable hot pressing rod 15 and the fixed hot pressing rod 17 press the bag opening of the packaging bag firmly. Then, as the middle rod 12 continues to move towards the packaging bag, the outer sealing heating plate 16 first pushes the downward-curved bag opening of the packaging bag to contact the adjacent inner sealing heating plate 9. Then, as it continues to move, the outer sealing heating plate 16 pushes the inner sealing heating plate 9 on one side closer to the inner sealing heating plate 9 on the other side, so that... There are packaging bags between the two inner sealing heating plates 9, between the outer sealing heating plate 16 and the adjacent inner sealing heating plate 9, and between the movable heat pressing rod 15 and the fixed heat pressing rod 17. Then, the inner sealing heating plate 9, the outer sealing heating plate 16, the movable heat pressing rod 15 and the fixed heat pressing rod 17 are activated to perform thermoforming. Two thermoforming seals are formed between the inner sealing heating plates 9 and between the outer sealing heating plate 16 and the adjacent inner sealing heating plate 9. At the same time, the movable heat pressing rod 15 and the fixed heat pressing rod 17 thermoform the bag openings on both sides of the bag opening stop 5, forming a ring structure between the two thermoforming positions of the packaging bag, which facilitates the later handling and transfer of the packaging bag.

[0031] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An agricultural product packaging device, comprising a sealing box (1), characterized in that: The sealing box (1) has an open structure on one end of its upper surface. A feeding belt (2) is installed inside the sealing box (1). The outer ring of the feeding belt (2) has a concave structure. Two conveyor wheels (3) are connected to the inner ring of the feeding belt (2). A support frame (4) is installed inside the sealing box (1). An intermittent control motor A (8) is installed on one side of the support frame (4). The output end of the intermittent control motor A (8) is coaxially connected to one of the conveyor wheels (3). Two bag mouth stops (5) are installed above the feeding belt (2). The sides of the two bag mouth stops (5) that are far apart from each other are fixed to the support frame (4). Both bag mouth stops (5) are... Located above the feeding belt (2), the two bag mouth baffles (5) are each provided with an inner sealing heating plate (9) below the open structure of the sealing box (1). The inner sealing heating plate (9) is located above the feeding belt (2). The lower end of the two inner sealing heating plates (9) is provided with a sleeve (10). The bottom surface of the inner sealing heating plate (9) is fixed with two bent rods (11). The upper end of the sleeve (10) is slidably sleeved on the outer surface of the adjacent bent rod (11). The bent rod (11) is elastically connected to the connected sleeve (10). The lower end of the sleeve (10) is fixed to the support frame (4). The inner sealing heating plate (9) is elastically connected to the support frame (4). An intermittent power transmission structure (6) is provided above the feeding belt (2). The intermittent power transmission structure (6) is located on the side of the bag mouth stop bar (5) away from the opening structure of the sealing box (1). An intermediate rod (12) is provided above the feeding belt (2). External sealing heating plates (16) are provided on both the front and rear sides of the intermediate rod (12). Both external sealing heating plates (16) are elastically connected to the intermediate rod (12). The intermediate rod (12) is located on the side of the intermittent power transmission structure (6) close to the opening structure of the sealing box (1). A track frame (13) is provided between the intermediate rod (12) and the intermittent power transmission structure (6). A shaft (14) is fixed at one end of the intermediate rod (12) close to the track frame (13). The shaft (14) is slidably inserted into the inside of the track frame (13). The shaft (14) and the intermittent power transmission structure (6) are connected together. The intermittent power transmission structure (6) is connected, the track frame (13) is fixed to the support frame (4), and two movable hot pressing rods (15) slide through the upper end of the middle rod (12) on both the front and back. The movable hot pressing rods (15) are elastically connected to the middle rod (12). The movable hot pressing rods (15) on both sides of the middle rod (12) are staggered. The upper surface of the shaft rod (14) is equipped with a horizontal and vertical limiting structure (7). The other end of the horizontal and vertical limiting structure (7) is fixed to the sealing box (1). The movable hot pressing rods (15) are located above the outer sealing heating plate (16). Two fixed hot pressing rods (17) are set above each inner sealing heating plate (9). The upper end of the fixed hot pressing rods (17) is fixed to the adjacent bag mouth stop bar (5). The four fixed hot pressing rods (17) are coaxially set with the four movable hot pressing rods (15).

2. The agricultural product packaging device according to claim 1, characterized in that: The intermittent power transmission structure (6) includes a notched arc frame (61) and a radial rod (62). The arc surface of the notched arc frame (61) is provided with an arc groove (63). The radial rod (62) is slidably inserted into the arc groove (63). A notched bevel gear ring (64) is coaxially installed on the side of the notched arc frame (61) away from the track frame (13). An intermittent control motor B (65) is fixed at one end of the radial rod (62) away from the axis of the notched arc frame (61). A bevel gear (66) meshes with the outer ring side of the notched bevel gear ring (64). The bevel gear (66) is fixedly sleeved on the output end of the intermittent control motor B (65). A sliding groove (68) is provided at one end of the radial rod (62) located on the inner ring side of the notched arc frame (61). A movable block (67) is slidably inserted into the sliding groove (68). The movable block (67) is rotatably sleeved on the outer surface of the shaft (14). The movable block (67) is elastically connected to the radial rod (62).

3. The agricultural product packaging device according to claim 2, characterized in that: The upper end of the trajectory frame (13) is arc-shaped, and the lower ends of the trajectory frame (13) are horizontal on both sides. The arc end of the trajectory frame (13) is coaxially set with the notch arc frame (61).

4. The agricultural product packaging device according to claim 1, characterized in that: The horizontal and vertical limiting structure (7) includes a vertical telescopic rod (71) and a horizontal rod (72). The lower end of the vertical telescopic rod (71) is fixed to the upper surface of the shaft (14), and the upper end of the vertical telescopic rod (71) is slidably sleeved on the outer surface of the horizontal rod (72). The two ends of the horizontal rod (72) are fixed to the sealing box (1).

5. The agricultural product packaging device according to claim 1, characterized in that: The two bag opening stops (5) are symmetrically distributed at the front and back of the central section of the feeding belt (2). The left ends of the two bag opening stops (5) are flared, and the right ends of the two bag opening stops (5) are round rods.

6. The agricultural product packaging device according to claim 5, characterized in that: The concave structure of the feeding belt (2) has an air jet frame (18) that slides in contact with it. The left end of the air jet frame (18) is fixed to the left inner wall of the sealing box (1). The right end of the air jet frame (18) is U-shaped. An air pump (19) is fixedly inserted through the left side of the sealing box (1). The air outlet of the air pump (19) is fixedly connected to the left end of the air jet frame (18).

7. The agricultural product packaging device according to claim 1, characterized in that: The sealing box (1) has two material limiting plates (20) fixedly inserted inside the open structure. The lower part of the two material limiting plates (20) is located between the two bag mouth stops (5), and the lower end of the two material limiting plates (20) is located inside the concave structure of the feeding belt (2).

8. The agricultural product packaging device according to claim 1, characterized in that: The outer sealing heating plate (16) has side plates (21) fixed at both ends, and the middle rod (12) is located between the four side plates (21), with the side plates (21) and the middle rod (12) in sliding contact.

9. An agricultural product packaging device according to claim 2, characterized in that: The axis of the radial rod (62) intersects perpendicularly with the axis of the notched arc frame (61), and the maximum longitudinal distance between the movable hot-pressing rods (15) on the front and rear sides of the middle rod (12) is greater than the maximum distance between the two outer sealing heating plates (16).

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