A food packaging bag sealing test device and its usage method

Abstract

This invention belongs to the field of sealing performance testing, specifically a sealing performance testing device for food packaging bags and its usage method. The device includes a main body with a transparent sealing barrel placed on it. A sealing cap is placed at the top of the transparent sealing barrel, and the sealing cap has an exhaust vent. A fixing shell and a sleeve are fixedly connected to the right side of the transparent sealing barrel. A water inlet is located near the bottom of the right side of the sealing cap. A fixing mechanism is installed inside the transparent sealing barrel to raise and lower a lifting ring. A stirring mechanism is installed at the bottom of the transparent sealing barrel to drive a stirring rod to rotate. A flipping mechanism is installed on the lifting ring to open and close a rotating plate. Through the structural design of the fixing mechanism, the device allows for easy and complete submersion of the food packaging bag in water, thus securing the bag.

Description

Technical Field

[0001] This invention relates to the field of airtightness testing, specifically to a device for testing the airtightness of food packaging bags and its usage method. Background Technology

[0002] Testing the airtightness of food packaging bags is an important part of food testing. When the packaging bag is not airtight, the food inside is prone to mold and dampness. Therefore, in order to ensure that the airtightness of the packaging bags meets the standards, manufacturers usually use airtightness testing devices to test some samples.

[0003] According to patent document CN202111034961.0, an intelligent sealing tester for puffed food packaging is disclosed, relating to the field of packaging testing technology. Its structure includes a sealing top cover, a testing barrel, and a main unit. The testing barrel is placed on the main unit, and a sealing top cover is provided on the top of the testing barrel. The testing barrel contains a lifting device and a traction mechanism. Two sets of traction mechanisms are provided and connected to the lifting device. Both the lifting device and the traction mechanism are connected to the testing barrel. The beneficial effects of this invention are: It secures the puffed food test sample, preventing it from falling off the sealing rope. Because the longitudinal section of the sealing rope is circular, the sealing rope and the puffed food test sample are in line contact, thus greatly reducing the contact area between the sealing rope and the puffed food test sample. This allows the puffed food test sample to be suspended and centered inside the testing barrel, thereby avoiding close contact between the puffed food test sample and the lid or barrel wall, which would affect the sealing performance test.

[0004] However, the aforementioned intelligent sealing tester for puffed food packaging requires securing the food packaging bags with binding threads to ensure the water level can submerge them during testing. Furthermore, the binding threads must be untied again when removing the food packaging bags, resulting in a significant time commitment for securing the bags and reduced testing efficiency. Therefore, this paper proposes a food packaging bag sealing test device and its usage method to address these issues. Summary of the Invention

[0005] To address the problem in the aforementioned intelligent sealing tester for puffed food packaging that requires securing the food packaging bags with binding threads to ensure the water level is submerged during testing, and then untying the binding threads again when removing the food packaging bags, thus consuming considerable time in securing the food packaging bags and reducing the efficiency of food packaging bag testing, this invention proposes a food packaging bag sealing performance testing device and its usage method.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a food packaging bag sealing performance testing device and its usage method, comprising a device body, a transparent sealing barrel placed on the device body, a sealing cap placed at the top of the transparent sealing barrel, an exhaust hole on the sealing cap, a fixed shell and a sleeve fixedly connected to the right side of the transparent sealing barrel, a water inlet near the bottom of the right side of the sealing cap, a fixing mechanism inside the transparent sealing barrel for raising and lowering the lifting ring, a stirring mechanism at the bottom of the transparent sealing barrel for driving the stirring rod to rotate, and a flipping mechanism on the lifting ring for opening and closing the rotating plate.

[0007] Preferably, the fixing mechanism includes an impeller rotatably connected inside the mounting housing. The mounting housing is fixedly connected to the rear end of the water inlet, and the interior of the mounting housing communicates with the water inlet. A first transmission rod is fixedly connected to the top of the impeller. Three sets of second fixing brackets are sleeved on the first transmission rod. The second fixing brackets are fixedly connected to the outer side of the transparent sealing barrel. The top of the first transmission rod is fixedly connected to a first helical gear. The first helical gear meshes with a second helical gear. The second helical gear is fixedly connected to a connecting gear. The connecting gear is rotatably connected inside the housing. The connecting gear meshes with a fixed rack. The fixed rack is fixedly connected to the right side of the lifting ring. A fixing rod is inserted into the left side of the lifting ring. The bottom end of the fixing rod is fixedly connected to the inner wall of the transparent sealing barrel. Two sets of connecting rods are fixedly connected to the bottom end of the lifting ring. The bottom end of the connecting rod is fixedly connected to a support plate, and the support plate is located directly below the driven gear.

[0008] Preferably, the agitation mechanism includes a drive gear, which is fixedly connected to the bottom end of the impeller and rotatably connected to the inside of the fixed shell. The drive gear meshes with a driven gear, the bottom end of which is rotatably connected to the inside of the transparent sealed barrel. A gear ring is fixedly connected to the top end of the driven gear, and the gear ring meshes with a rotating gear. The rotating gear is provided in three sets, and a second transmission rod is fixedly connected to the top end of the rotating gear. Three sets of first fixing frames are sleeved on the second transmission rod, and the first fixing frames are fixedly connected to the inner wall of the transparent sealed barrel. A stirring rod is fixedly connected to the top end of the second transmission rod.

[0009] Preferably, the flipping mechanism includes two sets of rotating plates that do not contact each other. A flipping gear is fixedly connected to one side of each rotating plate. The flipping gear is rotatably connected to the inner wall of the slot. The slot is opened on the inner wall of the lifting ring. The flipping gear meshes with a long rack. The top end of the long rack is inserted into the inside of the slot. The bottom end of the long rack is fixedly connected to a support rod. The bottom end of the support rod is fixedly connected to the top of the first fixed frame. The support rod has an L-shaped design, and the slot has a rectangular design.

[0010] Preferably, the bottom end of the lifting ring is rotatably connected to multiple sets of baffles, which are circumferentially distributed on the bottom end of the lifting ring, and the bottom end of the baffles is L-shaped.

[0011] Preferably, the bottom end of the tray has multiple sets of through holes, the driven gear has multiple sets of circular grooves, the left side of the transparent sealed barrel has a slag discharge port, and the slag discharge port is threaded with an end cap.

[0012] Preferably, a limiting component is provided at both the bottom and top of the fixed rack. The limiting component includes two sets of top blocks. The bottom top block abuts against the bottom of the fixed rack. A spring and a rod are fixedly connected to the side of the top block away from the fixed rack. The spring is sleeved on the rod, and the rod is inserted into the fixed block. The side of the spring away from the top block is fixedly connected to the fixed block. The fixed block is fixedly connected to the inner wall of the transparent sealed barrel.

[0013] Preferably, four sets of limiting blocks are fixedly connected to the inner wall of the transparent sealing barrel, and the limiting blocks are located below the lifting ring.

[0014] Preferably, multiple sets of collars are fixedly connected to the second transmission rod, and two adjacent sets of collars are in contact with the top and bottom ends of the first fixed frame, respectively.

[0015] A method of using a food packaging bag sealing test device, the method comprising the following steps: 1. First, open the sealing cap, and then place the food packaging bag onto the pallet through the hole in the middle of the lifting ring; S2. Connect the water pump connecting pipe to the water inlet and fill the transparent sealed bucket with water. The lifting ring inside the transparent sealed bucket will gradually move downward. When the lifting ring stops moving downward, stop filling the bucket when the water level has submerged the lifting ring. S3. Cover the fixed rack and connect the vacuum pump pipe to the exhaust port. Start the vacuum pump to evacuate the inside of the transparent sealed container and continue for a period of time while observing the food packaging bag inside the transparent sealed container. S4. Turn off the water pump and vacuum pump, then disconnect the water pump connecting pipe from the inlet. After the water inside the transparent sealed container is drained, open the sealing cover and finally remove the food packaging bag inside the transparent sealed container.

[0016] The advantages of this invention are: 1. This invention, through the structural design of the fixing mechanism, enables the food packaging bag to be completely submerged in water for secure fixing. This solves the problem in existing intelligent sealing detectors for puffed food packaging, where the food packaging bag is secured by binding with a tie to ensure the water level is submerged, and the tie needs to be untied again when the food packaging bag is removed. This results in a significant time consumption in securing the food packaging bag, leading to reduced detection efficiency.

[0017] 2. Through the structural design of the stirring mechanism, this invention enables multiple sets of stirring rods to rotate when water is poured into the transparent sealed bucket. This allows the food packaging bag placed inside the transparent sealed bucket to be moved by the water flow stirred by the stirring rods, thus rotating inside the transparent sealed bucket, making it convenient for inspectors to observe the food packaging bag.

[0018] 3. Through the structural design of the flipping mechanism, this invention enables the flipping function of two sets of rotating plates while the lifting ring is raised. When the food packaging bag inside the transparent sealed bucket is taken out, the rotating plates can be opened for easy retrieval. When the lifting ring moves downward, the rotating plates close to ensure that the food packaging bag can be completely submerged in water. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the transparent sealing bucket of the present invention; Figure 3 This is a schematic diagram of the connection structure of the driven gear of the present invention; Figure 4 This is a schematic diagram of the connection structure of the second transmission rod of the present invention; Figure 5 This is a schematic diagram of the structure of the top end of the lifting ring of the present invention; Figure 6 This is a schematic diagram of the structure of the bottom end of the lifting ring of the present invention; Figure 7 This is a schematic diagram of the connection structure of the top block of the present invention; Figure 8 This is a schematic diagram of the impeller connection structure of the present invention; Figure 9 This is a schematic diagram of the internal structure of the transparent sealing barrel of the present invention; Figure 10 This is a schematic diagram of the method flow of the present invention.

[0021] In the diagram: 1. Main body of the device; 20. Water inlet; 21. Transparent sealed barrel; 22. Sealing cover; 23. Vent; 24. Fixed shell; 25. Outer shell; 26. Mounting shell; 27. Drive gear; 28. Impeller; 29. ​​First transmission rod; 30. First helical gear; 31. Second helical gear; 32. Connecting gear; 33. Fixed rack; 34. Lifting ring; 35. Fixed rod; 36. Connecting rod; 37. Support plate; 38. Driven gear; 40. Gear ring; 41. Rotating gear; 42. Second transmission rod; 43. First fixed frame; 44. Stirring rod; 45. Second fixed frame; 46. Support rod; 47. Long rack; 48. Rotating plate; 49. Reversing gear; 50. Groove; 51. Through hole; 52. Circular groove; 53. Slag discharge port; 54. End cap; 55. Top block; 56. Spring; 57. Insert rod; 58. Fixed block; 59. Baffle; 60. Limiting block; 61. Collar. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1 Please see Figure 1 - Figure 9As shown, a food packaging bag sealing performance testing device and its usage method include a device body 1, a transparent sealing barrel 21 placed on the device body 1, a sealing cap 22 placed on the top of the transparent sealing barrel 21, an exhaust hole 23 on the sealing cap 22, a fixing shell 24 and a sleeve shell 25 fixedly connected to the right side of the transparent sealing barrel 21, a water inlet 20 near the bottom of the right side of the sealing cap 22, a fixing mechanism inside the transparent sealing barrel 21 for raising and lowering a lifting ring 34, a stirring mechanism at the bottom of the transparent sealing barrel 21 for driving a stirring rod 44 to rotate, and a flipping mechanism on the lifting ring 34 for opening and closing a rotating plate 48. Furthermore, the fixing mechanism includes an impeller 28, which is rotatably connected inside the mounting housing 26. The mounting housing 26 is fixedly connected to the rear end of the inlet 20, and the interior of the mounting housing 26 communicates with the inlet 20. A first transmission rod 29 is fixedly connected to the top of the impeller 28. Three sets of second fixing brackets 45 are sleeved on the first transmission rod 29. The second fixing brackets 45 are fixedly connected to the outer side of the transparent sealing barrel 21. The top of the first transmission rod 29 is fixedly connected to a first helical gear 30, and the first helical gear 30 meshes with the second helical gear 31. The second helical gear 31 is fixedly connected to the connecting gear 32, which is rotatably connected inside the housing 25. The connecting gear 32 meshes with the fixed rack 33, which is fixedly connected to the right side of the lifting ring 34. A fixed rod 35 is inserted into the left side of the lifting ring 34. The bottom end of the fixed rod 35 is fixedly connected to the inner wall of the transparent sealing barrel 21. Two sets of connecting rods 36 are fixedly connected to the bottom end of the lifting ring 34. The bottom end of the connecting rods 36 is fixedly connected to the support plate 37, which is located directly below the driven gear 38. Furthermore, the agitation mechanism includes a drive gear 27, which is fixedly connected to the bottom end of the impeller 28 and rotatably connected to the inside of the fixed shell 24. The drive gear 27 meshes with a driven gear 38, the bottom end of which is rotatably connected to the inside of the transparent sealed barrel 21. A gear ring 40 is fixedly connected to the top end of the driven gear 38, and the gear ring 40 meshes with a rotating gear 41. The rotating gear 41 is provided with three sets of gears, and a second transmission rod 42 is fixedly connected to the top end of the rotating gear 41. Three sets of first fixing frames 43 are sleeved on the second transmission rod 42, and the first fixing frames 43 are fixedly connected to the inner wall of the transparent sealed barrel 21. A stirring rod 44 is fixedly connected to the top end of the second transmission rod 42. Furthermore, the flipping mechanism includes two sets of rotating plates 48, which do not contact each other. A flipping gear 49 is fixedly connected to one side of each rotating plate 48. The flipping gear 49 is rotatably connected to the inner wall of the slot 50. The slot 50 is opened on the inner wall of the lifting ring 34. The flipping gear 49 meshes with a long rack 47. The top end of the long rack 47 is inserted into the inside of the slot 50. The bottom end of the long rack 47 is fixedly connected to a support rod 46. The bottom end of the support rod 46 is fixedly connected to the top end of the first fixed frame 43. The support rod 46 has an L-shaped design, and the slot 50 has a rectangular design. Through the structural design of the fixing mechanism, the food packaging bag can be easily submerged in water to fix it. During operation, the food packaging bag is first placed on the tray 37 through the hole in the middle of the lifting ring 34, and then the sealing cover 22 is closed. Water is then injected into the transparent sealing bucket 21 by the water pump. When the water flows through the inlet 20, it will drive the impeller 28 inside the mounting shell 26 to rotate clockwise. The impeller 28 drives the first transmission rod 29 fixed at its top to rotate. Three sets of second fixing brackets 45 are fitted on the first transmission rod 29 to support it during the rotation of the first transmission rod 29, so as to ensure the stable transmission of the first transmission rod 29. The top of the first transmission rod 29 is connected to the first helical gear 30, thereby driving the first helical gear 30 to rotate clockwise. The first helical gear 30 and the second helical gear 31 are meshed, thereby driving the second helical gear 31 to rotate counterclockwise. The second helical gear 31 and the connecting gear 32 are connected to the same rotating shaft, thus enabling the connecting gear 32 to rotate synchronously. During the counter-clockwise rotation of the connecting gear 32 inside the housing 25, it drives the fixed rack 33 meshing with it to move downwards. The lifting ring 34, fixed to the fixed rack 33, is then driven and moves downwards. A fixing rod 35 is inserted on the left side of the lifting ring 34 to ensure stability on the left side during movement. When the water level inside the transparent sealed container 21 submerges the lifting ring 34, the bottom of the lifting ring 34 can then... Secure the food packaging bag to ensure it is below the water level. Stop filling the water and cover it with the sealing cap 22. Then, connect the vent 23 to the vacuum pump in the pipeline to vent the air inside the transparent sealing barrel 21, creating a negative pressure environment inside the transparent sealing barrel 21. If the food packaging bag is not properly sealed, air bubbles will appear or the bag may even rupture at the point of leakage. Since the food packaging bag is placed on the tray 37, it will float when water is added. However, after the water inside the transparent sealing barrel 21 is drained, the food packaging bag will fall back onto the tray 37, making it easy to remove the food packaging.

[0024] Through the structural design of the stirring mechanism, multiple sets of stirring rods 44 are driven to rotate when water is poured into the transparent sealed container 21. This allows the food packaging bag placed inside the transparent sealed container 21 to be moved by the water flow stirred by the stirring rods 44, thus rotating inside the transparent sealed container 21 for easy observation by inspectors. When the water flow drives the impeller 28 to rotate, the drive gear 27 fixedly connected to the bottom end of the impeller 28 is driven synchronously and rotates. The drive gear 27 meshes with the driven gear 38 inside the transparent sealed container 21, thereby driving the driven gear 38 to rotate within the transparent sealed container. The inside of the barrel 21 rotates, and a gear ring 40 is fixed on the top of the driven gear 38. The gear ring 40 meshes with three sets of rotating gears 41, thus driving the rotating gears 41 to rotate. Three sets of first fixing brackets 43 are fitted on the second transmission rod 42 to support the second transmission rod 42 when it rotates. At this time, the rotating gear 41 will drive the second transmission rod 42 to rotate, and the stirring rod 44 fixed on the top of the second transmission rod 42 will rotate, thereby stirring the water inside the transparent sealed barrel 21, so that the water inside the transparent sealed barrel 21 can still drive the food packaging bag to rotate under the action of inertia after the water is filled.

[0025] Through the structural design of the flipping mechanism, the two sets of rotating plates 48 are flipped simultaneously as the lifting ring 34 rises. When the food packaging bag inside the transparent sealed container 21 is removed, the rotating plates 48 open for easy retrieval, and close when the lifting ring 34 moves downwards to ensure the food packaging bag is completely submerged in water. When the lifting ring 34 rises, the flipping gear 49, which meshes with the long rack 47, rotates, causing the rotating plates 48 to flip downwards. The design of the two sets of rotating plates 48 is used to close the middle of the lifting ring 34, so that the food packaging bag at the bottom of the lifting ring 34 can be completely submerged by the water level. Similarly, when the lifting ring 34 moves downward, the rotating plates 48 will gradually close, thereby closing the middle of the lifting ring 34. The two sets of rotating plates 48 do not contact each other to ensure that the rotating plates 48 will not abut during rotation. The support rod 46 is L-shaped and fixed on the first fixed frame 43 to ensure that the stirring rod 44 rotates normally and will not abut against the support rod 46.

[0026] Furthermore, the bottom end of the lifting ring 34 is rotatably connected to multiple sets of baffles 59, which are circumferentially distributed on the bottom end of the lifting ring 34, and the bottom end of the baffles 59 is designed in an L-shape. During operation, after water is injected into the transparent sealed barrel 21, the food packaging bags placed on the tray 37 will float up. At this time, multiple sets of baffles 59 can limit the food packaging bags, preventing them from moving around inside the transparent sealed barrel 21 and making them difficult to observe.

[0027] Furthermore, the bottom end of the tray 37 is provided with multiple sets of through holes 51, the driven gear 38 is provided with multiple sets of circular grooves 52, and the left side of the transparent sealing barrel 21 is provided with a slag discharge port 53, and an end cap 54 is threadedly connected to the slag discharge port 53. During operation, the through hole 51 is designed so that after the water inside the transparent sealed bucket 21 is drained, the water on the tray 37 can be drained through the through hole 51 to prevent it from accumulating on the tray 37. A slag discharge port 53 is provided on the left side of the transparent sealed bucket 21. When the food packaging bag inside the transparent sealed bucket 21 is broken and the food inside is leaked out, some residue will inevitably adhere to the inside of the transparent sealed bucket 21 after the water inside is drained. The through hole 51 on the tray 37 and the circular groove 52 on the driven gear 38 can ensure that the food residue can be smoothly discharged through the slag discharge port 53 when rinsing the inside of the transparent sealed bucket 21.

[0028] Furthermore, limiting components are provided at both the bottom and top of the fixed rack 33. The limiting components include two sets of top blocks 55. The bottom top block 55 abuts against the bottom of the fixed rack 33. A spring 56 and a rod 57 are fixedly connected to the side of the top block 55 away from the fixed rack 33. The spring 56 is sleeved on the rod 57. The rod 57 is inserted into the fixing block 58. The side of the spring 56 away from the top block 55 is fixedly connected to the fixing block 58. The fixing block 58 is fixedly connected to the inner wall of the transparent sealing barrel 21. During operation, when the connecting gear 32 drives the fixed rack 33 downward to its maximum displacement, the bottom end of the fixed rack 33 abuts against the top block 55, and the spring 56 fixed on the bottom end of the top block 55 is compressed. At this time, if the connecting gear 32 continues to rotate, it will disengage from the fixed rack 33. However, under the action of the spring 56, the fixed rack 33 will be pushed upward a certain distance, so that the top part of the fixed rack 33 will re-engage with the connecting gear 32 and cycle repeatedly until the connecting gear 32 stops rotating. The design of the limiting component facilitates fixation. When the fixed rack 33 moves upward or downward to its maximum displacement, after the connecting gear 32 stops rotating, the fixed rack 33 can then maintain engagement with the connecting gear 32 so that when the connecting gear 32 rotates in the opposite direction, it can drive the fixed rack 33 to continue moving. When the water inside the transparent sealed barrel 21 is discharged, the water flow through the inlet 20 will drive the impeller 28 to rotate in the opposite direction. Since the connecting gear 32 and the fixed rack 33 are engaged at this time, the fixed rack 33 can be smoothly lifted upward, thereby driving the lifting ring 34 to move upward.

[0029] Furthermore, four sets of limiting blocks 60 are fixedly connected to the inner wall of the transparent sealing barrel 21, and the limiting blocks 60 are located below the lifting ring 34. During operation, the four sets of limit blocks 60 are used to limit the maximum downward movement of the lifting ring 34, so as to prevent the bottom of the lifting ring 34 from contacting the stirring rod 44 due to excessive downward movement.

[0030] Example 2 Please see Figure 4 and Figure 10 As shown, in contrast to embodiment one as another implementation of the present invention, multiple sets of collars 61 are fixedly connected to the second transmission rod 42, and two adjacent sets of collars 61 are respectively in contact with the top and bottom ends of the first fixed frame 43. During operation, the collar 61 is designed to provide support for the second transmission rod 42 during rotation, so that the second transmission rod 42 can rotate stably.

[0031] A method of using a food packaging bag sealing test device, the method comprising the following steps: S1. First, open the sealing cap 22, and then place the food packaging bag onto the tray 37 through the hole in the middle of the lifting ring 34. S2. Connect the water pump connecting pipe to the water inlet 20 and fill the transparent sealed bucket 21 with water. The lifting ring 34 inside the transparent sealed bucket 21 will gradually move downward. When the lifting ring 34 stops moving downward, stop filling the water when the water level has submerged the lifting ring 34. S3. Cover the fixing rack 33, connect the vacuum pump pipe to the exhaust port 23, start the vacuum pump to evacuate the inside of the transparent sealed barrel 21, continue for a period of time, and observe the food packaging bag inside the transparent sealed barrel 21. S4. Turn off the water pump and vacuum pump, then disconnect the water pump connecting pipe from the inlet 20. After the water inside the transparent sealed container 21 is drained, open the sealing cover 22 and finally remove the food packaging bag inside the transparent sealed container 21.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A food packaging bag sealing performance testing device, comprising a device body (1), a transparent sealing barrel (21) placed on the device body (1), a sealing cap (22) placed on the top of the transparent sealing barrel (21), and an exhaust hole (23) provided on the sealing cap (22), characterized in that: The right side of the transparent sealing barrel (21) is fixedly connected to a fixed shell (24) and a sleeve shell (25). The sealing cover (22) is provided with a water inlet (20) near the bottom on the right side. The transparent sealing barrel (21) is provided with a fixing mechanism, which is used to lift and lower the lifting ring (34). The bottom of the transparent sealing barrel (21) is provided with a stirring mechanism, which is used to drive the stirring rod (44) to rotate. The lifting ring (34) is provided with a flipping mechanism, which is used to open and close the rotating plate (48).

2. The food packaging bag sealing performance testing device according to claim 1, characterized in that: The fixing mechanism includes an impeller (28), which is rotatably connected to the inside of a mounting shell (26). The mounting shell (26) is fixedly connected to the rear end of the inlet (20), and the inside of the mounting shell (26) communicates with the inlet (20). A first transmission rod (29) is fixedly connected to the top of the impeller (28). Three sets of second fixing brackets (45) are sleeved on the first transmission rod (29). The second fixing brackets (45) are fixedly connected to the outside of the transparent sealing barrel (21). The top of the first transmission rod (29) is fixedly connected to a first helical gear (30). The first helical gear (30) meshes with the second helical gear (31). The second helical gear (31) is fixedly connected to the connecting gear (32), the connecting gear (32) is rotatably connected inside the housing (25), the connecting gear (32) meshes with the fixed rack (33), the fixed rack (33) is fixedly connected to the right side of the lifting ring (34), the left side of the lifting ring (34) is provided with a fixed rod (35), the bottom end of the fixed rod (35) is fixedly connected to the inner wall of the transparent sealing barrel (21), the bottom end of the lifting ring (34) is fixedly connected with two sets of connecting rods (36), the bottom end of the connecting rods (36) is fixedly connected to the support plate (37), the support plate (37) is located directly below the driven gear (38).

3. The food packaging bag sealing performance testing device according to claim 1, characterized in that: The stirring mechanism includes a drive gear (27), which is fixedly connected to the bottom end of the impeller (28). The drive gear (27) is rotatably connected to the inside of the fixed shell (24). The drive gear (27) meshes with the driven gear (38). The bottom end of the driven gear (38) is rotatably connected to the inside of the transparent sealed barrel (21). A gear ring (40) is fixedly connected to the top end of the driven gear (38). The gear ring (40) meshes with a rotating gear (41). The rotating gear (41) is provided with three sets. A second transmission rod (42) is fixedly connected to the top end of the rotating gear (41). Three sets of first fixing frames (43) are sleeved on the second transmission rod (42). The first fixing frames (43) are fixedly connected to the inner wall of the transparent sealed barrel (21). A stirring rod (44) is fixedly connected to the top end of the second transmission rod (42).

4. The food packaging bag sealing performance testing device according to claim 1, characterized in that: The flipping mechanism includes two sets of rotating plates (48), which do not contact each other. A flipping gear (49) is fixedly connected to one side of the rotating plate (48). The flipping gear (49) is rotatably connected to the inner wall of the slot (50). The slot (50) is opened on the inner wall of the lifting ring (34). The flipping gear (49) meshes with a long rack (47). The top end of the long rack (47) is inserted into the inside of the slot (50). The bottom end of the long rack (47) is fixedly connected to a support rod (46). The bottom end of the support rod (46) is fixedly connected to the top end of the first fixed frame (43). The support rod (46) has an L-shaped design, and the slot (50) has a rectangular design.

5. The food packaging bag sealing performance testing device according to claim 4, characterized in that: The bottom end of the lifting ring (34) is rotatably connected to multiple sets of baffles (59). The baffles (59) are circumferentially distributed on the bottom end of the lifting ring (34), and the bottom end of the baffles (59) is L-shaped.

6. The food packaging bag sealing performance testing device according to claim 2, characterized in that: The bottom end of the tray (37) has multiple sets of through holes (51), the driven gear (38) has multiple sets of circular grooves (52), the left side of the transparent sealed barrel (21) has a slag discharge port (53), and the slag discharge port (53) is threaded with an end cap (54).

7. The food packaging bag sealing performance testing device according to claim 2, characterized in that: Limiting components are provided at both the bottom and top of the fixed rack (33). The limiting components include two sets of top blocks (55). The bottom top block (55) abuts against the bottom of the fixed rack (33). A spring (56) and a rod (57) are fixedly connected to the side of the top block (55) away from the fixed rack (33). The spring (56) is sleeved on the rod (57). The rod (57) is inserted into the fixed block (58). The side of the spring (56) away from the top block (55) is fixedly connected to the fixed block (58). The fixed block (58) is fixedly connected to the inner wall of the transparent sealed barrel (21).

8. The food packaging bag sealing performance testing device according to claim 7, characterized in that: Four sets of limiting blocks (60) are fixedly connected to the inner wall of the transparent sealing barrel (21), and the limiting blocks (60) are located below the lifting ring (34).

9. The food packaging bag sealing performance testing device according to claim 8, characterized in that: Multiple sets of collars (61) are fixedly connected to the second transmission rod (42), and two adjacent sets of collars (61) are in contact with the top and bottom ends of the first fixed frame (43), respectively.

10. A method of using a food packaging bag sealing performance testing device, applied to the food packaging bag sealing performance testing device according to any one of claims 1-9, characterized in that, This working method includes the following steps: S1. First, open the sealing cap (22), and then place the food packaging bag onto the tray (37) through the hole in the middle of the lifting ring (34); S2. Connect the water pump connecting pipe to the water inlet (20) and fill the transparent sealed bucket (21) with water. The lifting ring (34) inside the transparent sealed bucket (21) will gradually move downward. When the lifting ring (34) stops moving downward, stop filling the water when the water level submerges the lifting ring (34). S3. Cover the fixed rack (33), connect the vacuum pump pipe to the exhaust port (23), start the vacuum pump to evacuate the inside of the transparent sealed barrel (21), and continue for a period of time, and observe the food packaging bag inside the transparent sealed barrel (21). S4. Turn off the water pump and vacuum pump, then pull the water pump connecting pipe out of the inlet (20). After the water inside the transparent sealed bucket (21) is drained, open the sealing cover (22) and finally take out the food packaging bag inside the transparent sealed bucket (21).

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