Horizontal online air tightness detection equipment and system

Abstract

The utility model discloses a horizontal online air tightness detection device and system, and relates to the technical field of air tightness detection devices for inflatable packaging products. The utility model provides horizontal on-line air tightness detection equipment and system. The horizontal on-line air tightness detection equipment comprises a rack, a servo driving mechanism, a plurality of groups of air tightness detection boxes, an opening and closing track and a synchronous rotating tower assembly, wherein the projection of the servo driving mechanism on a horizontal plane is in a closed rectangle shape; the servo driving mechanism drives the multiple groups of air tightness detection boxes to circularly move along a set direction; the air tightness detection box comprises a base and a gland, a transmission assembly is arranged between the base and the gland, the transmission assembly is connected with a rolling shaft, the rolling shaft moves up and down under the cooperation of the opening and closing track, and the transmission assembly drives the gland to be opened or closed. According to the utility model, the plurality of air tightness detection boxes which are distributed in a rectangular manner are matched to carry out on-line air tightness detection, required matching mechanisms are fewer, and compared with the prior art, the air tightness detection device is high in detection efficiency and low in equipment cost and manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the technical field of airtightness testing equipment for inflatable packaging, and more specifically to a horizontal online airtightness testing equipment and system. Background Technology

[0002] When packaging fragile and easily deformable foods, it is necessary to inflate the food packaging. Inflation primarily involves filling the packaging with a protective gas. This serves two purposes: firstly, it extends the shelf life and protects the quality of the food; secondly, it prevents compression and maintains the food's shape. Specifically, for fragile or easily deformable foods such as puffed foods, bread, and pastries, inflatable packaging provides cushioning, preventing damage during transportation and storage and thus maintaining the food's original shape. It also prevents deformation caused by compression within the packaging. When using food inflation equipment, the air is typically first extracted from the packaging by an air extraction mechanism, and then a protective gas (such as nitrogen) is injected by an inflation mechanism. Finally, a heat-sealing mechanism seals the inflation port. After inflation, the food packaging needs to be leak-tested to ensure that the protective gas does not leak, thus preventing the protective effect from failing.

[0003] For example, a utility model patent with authorization announcement number CN219935233U, authorization announcement date October 31, 2023, and titled "A Packaging Product Bag Breakage Detection Mechanism," places the packaging product to be tested in a sealed box, extracts air from the box, and observes whether the air pressure data sensed by the air pressure sensor changes. If a change occurs, the packaging product to be tested is considered damaged or leaking. This utility model patent's disclosed packaging product bag breakage detection mechanism is only suitable for sampling inspection and cannot test all packaging products continuously output from inflatable packaging equipment. This results in unqualified packaging products being missed during airtightness testing, affecting food safety and production efficiency.

[0004] For example, the invention patent application with publication number CN116242540A and publication date of June 9, 2023, entitled "Horizontal Online Airtightness Detection Device," describes the working principle as follows: The packaging machine continuously discharges material through a speed-controlled feeding conveyor mechanism, which uses speed control, guidance, and infrared sensors to count and detect the material. The material continuously enters the slots in the dual-servo grouping module to achieve equidistant grouping. After grouping, the material is moved to the position to be picked up, and is picked up by the vacuum suction cup of the vacuum feeding suction cup clamp and placed in the positioning fixture for positioning. Then, the servo module drives the vacuum feeding suction cup clamp and the vacuum unloading suction cup clamp to pick up the positioned material into the vacuum fixture assembly. The cylinder connecting panel in the pneumatic lifting mechanism sensor assembly is vertically pressed into the sealing ring embedded on the upper surface of the vacuum container assembly. The vacuum valve assembly removes air from each vacuum container of the vacuum container assembly to achieve a certain vacuum degree. Then, the vacuum sensor determines whether there is air leakage in the material being tested. After the inspection is completed, the vacuum unloading suction cup clamp will transport the material in the vacuum container assembly to the discharge conveyor mechanism. The unqualified products will be signaled and rejected by the rejection mechanism. The qualified materials will be transported to the next designated station by the pull-speed discharge conveyor mechanism.

[0005] The horizontal online airtightness testing device disclosed in the prior art requires the cooperation of mechanisms such as dual servo grouping modules, vacuum feeding suction cup clamps, and vacuum unloading suction cup clamps to achieve online airtightness testing of packaged products. The mechanisms require precise coordination of their movements, and the control system is complex and costly. Furthermore, the number of actions required by the multiple mechanisms is also large, resulting in low airtightness testing efficiency, complex mechanical structure, and high equipment production and manufacturing costs.

[0006] For example, the invention patent application with publication number CN116242541A, publication date June 9, 2023, entitled "Vertical Rotary Online Airtightness Testing Device," uses a unique cam mechanism paired with a vacuum container, enabling the vacuum container to open and close during its movement trajectory. The cam mechanism can adjust the detection speed by regulating the servo motor speed. However, this prior art uses a vertical rotary structure, requiring a certain amount of time for the vacuum container to be evacuated. The cam mechanism's movement time from feeding to discharging must meet at least one detection time. If the rotation speed is too fast, the airtightness testing time will not be met; if the rotation speed matches the airtightness testing time, the detection efficiency will decrease. Increasing the number of vacuum containers will increase the size of the testing device. Since the material to be tested is fed horizontally, the increased size of the testing device also necessitates adjusting the height of the feeding conveyor mechanism. Furthermore, the cam frame on the cam mechanism needs to open and close the vacuum container, requiring axial and radial displacement, resulting in a complex design and high equipment and manufacturing costs. Utility Model Content

[0007] In order to overcome the defects and deficiencies in the existing technology, the present invention provides a horizontal online airtightness testing device and system. The purpose of the invention is to provide an airtightness testing device with simple structure and low equipment and manufacturing costs. This utility model provides a horizontal online airtightness testing device and system, including a frame, a servo drive mechanism, multiple sets of airtightness testing boxes, an opening and closing track, and a synchronous rotating tower assembly. The servo drive mechanism, the opening and closing track, and the synchronous rotating tower assembly are all mounted on the frame. The projection of the servo drive mechanism on the horizontal plane is a closed rectangle. Multiple sets of airtightness testing boxes are evenly distributed around the servo drive mechanism and connected to it, and are driven by the servo drive mechanism to move cyclically in a set direction. Each airtightness testing box includes a base and a cover, and a transmission component is provided between the base and the cover. The transmission component is connected to a roller, which is slidably mounted in the opening and closing track. The roller moves up and down with the cooperation of the opening and closing track, and drives the cover to open or close through the transmission component. A pressure sensor and an air pipe connector are provided on the cover. The synchronous rotating tower assembly is provided with a connecting line electrically connected to the pressure sensor and an air pipe connected to the air pipe connector. The synchronous rotating tower assembly is synchronized with the servo drive mechanism. The airtightness testing device of this utility model uses multiple airtightness testing boxes arranged in a rectangular shape to perform online airtightness testing. The testing time can be controlled by extending the length of the long side. It requires fewer supporting mechanisms and has higher testing efficiency and lower equipment and manufacturing costs compared with the prior art.

[0008] To address the problems existing in the prior art, the present invention is achieved through the following technical solution.

[0009] The first aspect of this utility model provides a horizontal online airtightness testing device, which includes a frame, a servo drive mechanism, multiple airtightness testing boxes, an opening and closing track, and a synchronous rotating tower assembly, wherein the servo drive mechanism, the opening and closing track, and the synchronous rotating tower assembly are all mounted on the frame.

[0010] The projection of the servo drive mechanism on the horizontal plane is a rectangle with rounded corners. Multiple airtightness detection boxes are evenly distributed around the servo drive mechanism and connected to it. They are driven by the servo drive mechanism to move cyclically in a set direction. The motion trajectory of the airtightness detection boxes driven by the servo drive mechanism is projected on the horizontal plane as a rectangle with rounded corners.

[0011] The airtightness testing box includes a base and a pressure cap, forming a sealed testing cavity for accommodating the packaged product to be tested. An air pipe connector and a pressure sensor for detecting changes in gas pressure within the sealed testing cavity are provided on the pressure cap. The synchronous rotating tower assembly is provided with a connecting line connected to the pressure sensor and an air pipe connected to the air pipe connector. The synchronous rotating tower assembly rotates synchronously with the airtightness testing box under the drive of its synchronous drive mechanism.

[0012] The cover and the base are connected by a transmission assembly, which is connected to a guide roller. The guide roller is assembled in an opening and closing track. The projection of the opening and closing track on the horizontal plane is a rectangle with rounded corners. The opening and closing track restricts the height change of the guide roller, thereby realizing the opening and closing control of the airtightness testing box.

[0013] Further preferably, the opening and closing track includes a first height track segment, a second height track segment, a first transition track segment, and a second transition track segment. The height of the first height track segment is higher than the height of the second height track segment. The first transition track segment is connected to the first height track segment by the second height track segment, and the second transition track segment is connected to the second height track segment by the first height track segment. When the guide roller is located within the first height track segment, the pressure cap is pressed against the base, and the airtightness detection box is in a closed state. When the guide roller is located within the second height track segment, the pressure cap leaves the base, and the airtightness detection box is in an open state. When the guide roller passes through the first transition track segment, the airtightness detection box gradually changes from an open state to a closed state. When the guide roller passes through the second transition track segment, the airtightness detection box gradually changes from a closed state to an open state.

[0014] More preferably, the opening and closing track is formed by a first limiting rod and a second limiting rod arranged vertically.

[0015] More preferably, an air blowing component is provided on the inner side of the end of the second transition track section for blowing the qualified packaged goods that have been tested and are good out of the opened airtightness test box.

[0016] More preferably, an air blowing component is provided on the inner side of the second height track section for blowing out defective packaged products that have been tested and are found to be defective from the airtightness test box.

[0017] More preferably, the frame is provided with a defective product hopper, which is located on the outside of the airtightness testing box corresponding to the defective product blowing component.

[0018] Further preferably, the transmission assembly includes a first support shaft, a first connecting rod, and an auxiliary opening and closing component; a pair of first support ear plates and a pair of second support ear plates are provided on the base, the two first support ear plates of the first support ear plate pair are spaced apart by a predetermined distance and located at one end of the pressure plate; the two second support ear plates of the second support ear plate pair are respectively located on both sides of the pressure plate; a first oblong hole is provided on the first support ear plate, and the first support shaft is slidably assembled in the first oblong hole of the first support ear plate pair; the middle part of the first connecting rod is sleeved on the first support shaft; the auxiliary opening and closing component is provided with three hinge parts, the first hinge part is hinged to the pressure plate, the second hinge part is hinged to the first support ear plate pair, and the third hinge part is hinged to the lower end of the first connecting rod; the guide roller is provided at the upper end of the first connecting rod, and the axial direction of the guide roller is parallel to the base; a second oblong hole is provided on the second support ear plate, and rollers are respectively provided on both sides of the pressure plate, the rollers being slidably fitted in the second oblong hole.

[0019] More preferably, the guide roller is mounted on the end of the first connecting rod via a mounting component, and the axial direction of the guide roller is perpendicular to the length direction of the first connecting rod.

[0020] More preferably, limiting rollers are provided at both ends of the first support shaft, and the limiting rollers are fitted with the first waist-shaped hole; the limiting rollers are provided with limiting steps.

[0021] More preferably, the first waist-shaped hole is arc-shaped.

[0022] More preferably, the second waist-shaped hole is a straight waist-shaped hole with an incline, and the end of the second waist-shaped hole away from the base is inclined toward the first support ear plate.

[0023] More preferably, a sealing gasket is provided on the edge of the pressure cap that contacts the base.

[0024] More preferably, the base is provided with a pair of side baffles and a front baffle, which form a receiving slot for receiving the packaged item to be tested, and the receiving slot is located inside the sealed testing cavity.

[0025] More preferably, a notch is provided between the front baffle and the base.

[0026] More preferably, the synchronous rotating tower assembly is provided with an electromagnetic valve group, which is used to control the air pipe to draw air or blow air into the airtightness detection box.

[0027] The second aspect of this utility model provides a horizontal online airtightness testing system, including an infeed conveyor line and an outfeed conveyor line. A horizontal online airtightness testing device as described in the first aspect is disposed between the infeed conveyor line and the outfeed conveyor line. The infeed conveyor line is connected to an open airtightness testing box located at the second height track section or the connection point between the second height track section and the first transition track section of the horizontal online airtightness testing device, for inputting the packaged product to be tested into the airtightness testing box. The outfeed conveyor line is correspondingly disposed outside the airtightness testing box corresponding to the qualified product blowing component, and the qualified product blowing component blows the tested and qualified packaged product onto the outfeed conveyor line.

[0028] More preferably, a clamping conveyor mechanism is provided between the feeding conveyor line and the horizontal online airtightness testing equipment. The clamping conveyor mechanism includes a pair of opposing clamping conveyor belts, which clamp and convey the packaged product to be tested conveyed by the feeding conveyor line into the open airtightness testing box.

[0029] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0030] 1. The horizontal online air tightness testing equipment of this utility model includes a servo drive mechanism, multiple air tightness testing boxes, an opening and closing track and a synchronous rotating tower assembly. Compared with the existing horizontal online air tightness testing devices, it lacks mechanisms such as dual servo grouping modules, vacuum feeding suction cup clamps, and vacuum unloading suction cup clamps, which simplifies the equipment structure and greatly reduces equipment and manufacturing costs.

[0031] 2. Compared with existing vertical rotary online airtightness testing devices, the testing equipment of this invention is horizontally arranged. When testing time is insufficient, only the long side of the rectangle needs to be extended, and extending the long side of the rectangle only requires lengthening the servo drive mechanism, with minimal changes to the overall structure. The feeding and discharging of the testing equipment of this invention are on the same horizontal plane, eliminating the need for a high conveyor height, which is more conducive to integration with packaging production lines. The height of the equipment can be effectively controlled, and the feeding position of the packaged goods to be tested and the discharging position of qualified products can be flexibly set.

[0032] 3. The opening and closing track of this utility model only needs to control the height change of the guide roller to realize the opening and closing control of the cover on the base. Compared with the existing cam frame structure, it is simpler and has lower manufacturing and processing costs.

[0033] 4. The opening and closing track structure of this utility model is simple, consisting only of a first height track section, a second height track section, a first transition track section, and a second transition track section. By changing the height difference, the height of the guide roller is controlled, thereby realizing the opening and closing control of the airtightness detection box.

[0034] 5. The airtightness testing box of this utility model, through the arrangement of a first pair of supporting ear plates, a second pair of supporting ear plates, a first oblong hole, a second oblong hole, a first connecting rod, a first supporting shaft, and auxiliary opening and closing components, enables the guide roller to perform reciprocating motion in only one direction, thereby realizing the opening and closing between the cover and the base plate. When designing the motion trajectory, only a change in the motion trajectory in one direction needs to be designed, that is, to achieve the up and down movement of the roller, which can realize the stable opening and closing between the cover and the base plate. This simplifies the design requirements for the opening and closing motion trajectory of the airtightness testing box, thereby reducing its manufacturing cost.

[0035] 6. In this utility model, the arrangement of the first support ear plate pair, the second support ear plate pair, the first waist-shaped hole, the second waist-shaped hole, the first connecting rod, the first support shaft and the auxiliary opening and closing parts makes the trajectory of the cover leaving the base a straight trajectory, that is, the cover is subjected to uniform force when it separates from the base, avoiding the situation where the sealing performance is reduced due to uneven force on the cover (such as one end of the cover opening first and the other end opening later).

[0036] 7. In this invention, the trajectories of the second and first oblong holes control the opening and closing angle of the cap, i.e., the amplitude of the opening and closing swing. The second oblong hole is inclined, so that when the cap is fully open, one end has a larger opening and the other end has a smaller opening. The end with the larger opening is used to receive the packaged product to be tested. This also minimizes the displacement of the guide roller, avoiding the need for a large displacement of the roller to fully open the cap, further reducing the design requirements and manufacturing costs of the movement trajectory for opening and closing the airtightness testing box. At the same time, the first and second oblong holes also serve as limiters to prevent the cap from over-opening or closing.

[0037] 8. In this utility model, side baffles and front baffles are provided on the base plate to facilitate the conveying and positioning of the packaged items to be tested, which is beneficial for online continuous testing of the packaged items to be tested. A notch is provided between the front baffle and the base, through which the air blowing component located at the rear of the airtightness testing box can easily blow the tested packaged items away from the airtightness testing box. Attached Figure Description

[0038] Figure 1 A three-dimensional structural diagram of a horizontal online airtightness testing device;

[0039] Figure 2 This is a schematic diagram of the main structure of a horizontal online airtightness testing device.

[0040] Figure 3 This is a side view of the horizontal online airtightness testing equipment.

[0041] Figure 4 This is a top view of the horizontal online airtightness testing equipment.

[0042] Figure 5 This is an assembly structure diagram of the servo drive mechanism, opening and closing track, and synchronous rotating tower in a horizontal online airtightness testing device.

[0043] Figure 6 This is a top view of the horizontal online airtightness testing system.

[0044] Figure 7 This is a three-dimensional structural diagram of the airtightness testing box in the closed state.

[0045] Figure 8 This is a three-dimensional structural diagram of the airtightness testing box in the open state.

[0046] Figure 9 This is a top view of the airtightness testing box in its closed state.

[0047] Figure 10 This is a top view of the airtightness testing box in the open state.

[0048] Figure 11 This is a side view of the airtightness testing box in the closed state.

[0049] Figure 12 This is a side view of the airtightness testing box in the open state.

[0050] Figure 13 This is a front view schematic diagram of the airtightness testing box in the closed state.

[0051] Figure 14 This is a front view of the airtightness testing box in the open state.

[0052] Figure 15 This is a rear view schematic diagram of the airtightness testing box in the closed state.

[0053] Figure 16 This is a rear view schematic diagram of the airtightness testing box in the open state.

[0054] Figure 17 This is a three-dimensional structural diagram of the airtightness testing box and its connection to the opening and closing track.

[0055] Figure 18 This is a side view of the airtightness testing box and its connection to the opening and closing track.

[0056] Figure 19 A top view schematic diagram of the airtightness testing box and its connection to the opening and closing track;

[0057] Reference numerals: 1. Frame; 2. Servo drive mechanism; 3. Air tightness test box; 4. Opening and closing track; 5. Synchronous rotating tower assembly; 6. Base; 7. Pressure cap; 8. Air pipe connector; 9. Pressure sensor; 10. Air pipe; 11. Synchronous drive mechanism; 12. Guide roller; 13. First height track section; 14. Second height track section; 15. First transition track section; 16. Second transition track section; 17. First limit rod; 18. Second limit rod; 19. Qualified product air blowing component; 20. Unqualified product air blowing component; 21. Unqualified product discharge hopper. 22. First support shaft; 23. First connecting rod; 24. Auxiliary opening and closing component; 25. First support ear plate; 26. Second support ear plate; 27. First oblong hole; 28. First hinge part; 29. ​​Second hinge part; 30. Third hinge part; 31. Second oblong hole; 32. Roller; 33. Mounting component; 34. Limiting roller; 35. Limiting step; 36. Sealing gasket; 37. Side baffle; 38. Front baffle; 39. Notch; 40. Solenoid valve assembly; 41. Feed conveyor line; 42. Discharge conveyor line; 43. Clamping conveyor mechanism; 44. Packaging product. Detailed Implementation

[0058] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0059] Example 1

[0060] As a preferred embodiment of this utility model, please refer to the appendix to the specification. Figure 1 Appendix Figure 2 Appendix Figure 3 and attached Figure 4 As shown in the figure, this embodiment discloses a horizontal online airtightness testing device. The airtightness testing device includes a frame 1 (only part of the frame 1 is shown in the figure), a servo drive mechanism 2, multiple airtightness testing boxes 3, an opening and closing track 4, and a synchronous rotating tower assembly 5. The servo drive mechanism 2, the opening and closing track 4, and the synchronous rotating tower assembly 5 are all mounted on the frame 1.

[0061] The projection of the servo drive mechanism 2 on the horizontal plane is a rectangle with rounded corners. Multiple airtightness detection boxes 3 are evenly distributed around the servo drive mechanism 2 and connected to it. They are driven by the servo drive mechanism 2 to move cyclically in a set direction. The motion trajectory of the airtightness detection box 3 driven by the servo drive mechanism 2 is a rectangle with rounded corners on the horizontal plane.

[0062] The airtightness testing box 3 includes a base 6 and a pressure cover 7, forming a sealed testing cavity for accommodating the packaged product 44 to be tested. An air pipe connector 8 and a pressure sensor 9 for detecting changes in gas pressure within the sealed testing cavity are provided on the pressure cover 7. The synchronous rotating tower assembly 5 is provided with a connecting line (not shown in the figure) connected to the pressure sensor 9 and an air pipe 10 (only a portion of the air pipe 10 is shown in the figure) connected to the air pipe connector 8. The synchronous rotating tower assembly 5 maintains synchronous rotation with the airtightness testing box 3 under the drive of its synchronous drive mechanism 11.

[0063] The pressure cap 7 is connected to the base 6 via a transmission assembly, which is connected to a guide roller 12. The guide roller 12 is mounted in the opening and closing track 4. The projection of the opening and closing track 4 on the horizontal plane is a rectangle with rounded corners. The opening and closing track 4 restricts the height change of the guide roller 12, thereby realizing the opening and closing control of the airtightness detection box 3.

[0064] The specific working principle of this horizontal online airtightness testing equipment is as follows:

[0065] After the packaged product 44 to be tested is input into the opened airtightness test box 3, the servo drive mechanism 2 drives the airtightness test box 3 to move. During the movement, the guide roller 12 slides in the opening and closing track 4. After the opening and closing track 4 becomes lower, the height of the guide roller 12 becomes lower, so that the pressure cover 7 is pressed onto the base 6. At this time, the synchronous rotating tower assembly 5 rotates synchronously with the airtightness testing box 3 containing the packaged product 44 to be tested. Air is drawn from the airtightness testing box 3 through the air pipe 10. After reaching the set vacuum level, the value of the pressure sensor 9 on the airtightness testing box 3 is read using the connecting wire. If the value does not change, it means that the packaged product 44 has good airtightness. As the servo drive mechanism 2 continues to drive the airtightness testing box 3 to continue moving, when it moves to the position where the height of the opening and closing track 4 is raised, the guide roller 12 rises, driving the pressure cover 7 to leave the base 6, realizing the opening of the airtightness testing box 3, and the qualified packaged product 44 is output. If the value of the pressure sensor 9 changes, it means that the gas in the packaged product 44 has leaked into the airtightness testing box 3, indicating that the airtightness of the packaged product 44 is not good, and it is an unqualified packaged product 44. After the airtightness testing box 3 is opened, the unqualified packaged product 44 is rejected.

[0066] As an example of this embodiment, please refer to the appendix to the specification. Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and attached Figure 5 As shown, the servo drive mechanism 2 includes a servo motor, a reducer, one driving sprocket, three driven sprockets, and a chain. The four sprockets are located at the four corner positions, and the chain is connected to the sprockets. The airtightness detection box 3 is connected to the chain. As an alternative, a synchronous belt and synchronous pulley structure can be used. Any drive mechanism capable of moving the airtightness detection box 3 is acceptable; this application does not specifically limit its structure.

[0067] As another example of this embodiment, refer to the appendix to the specification. Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and attached Figure 5 As shown, the synchronous drive mechanism 11 of the synchronous rotating tower assembly 5 includes a servo motor, a reducer, a main synchronous pulley, a driven synchronous pulley, and a synchronous belt. A chain and sprocket structure can also be used instead. This application does not specifically limit its structure.

[0068] The synchronous rotating tower assembly 5 is mainly used for evacuating and blowing air into each airtightness testing box 3. When the airtightness testing box 3 is closed, a vacuum is evacuated through the air pipe 10. When the airtightness testing box 3 needs to be opened, air is injected into it to break the negative pressure state, so that the airtightness testing box 3 can be opened smoothly. As a preferred embodiment, a solenoid valve group 40 is provided on the synchronous rotating tower to control the air pipe 10 to inject or evacuate air into the airtightness testing box 3. Since each airtightness testing box 3 rotates cyclically, the synchronous rotating tower is set up to ensure the connection of the air pipe 10 of each airtightness testing box 3 and the signal transmission of the pressure sensor 9. The synchronous rotating tower generally uses existing pneumatic-electric rotary slip rings to realize the signal transmission of the pressure sensor 9, and uses pneumatic rotary joints to realize the switching and connection of the air path.

[0069] Example 2

[0070] As another preferred embodiment of this utility model, this embodiment further supplements and elaborates on the technical solution of this utility model based on the above-described embodiment 1. (Refer to the appendix of the specification.) Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 17 Appendix Figure 18 and attached Figure 19 As shown, the opening and closing track 4 includes a first height track segment 13, a second height track segment 14, a first transition track segment 15, and a second transition track segment 16. The height of the first height track segment 13 is higher than the height of the second height track segment 14. The first transition track segment 15 is connected to the first height track segment 13 by the second height track segment 14, and the second transition track segment 16 is connected to the second height track segment 14 by the first height track segment 13. When the guide roller 12 is located within the first height track segment 13, the pressure cover 7 is pressed against the base 6, and the airtightness detection box 3 is in a closed state. When the guide roller 12 is located within the second height track segment 14, the pressure cover 7 leaves the base 6, and the airtightness detection box 3 is in an open state. When the guide roller 12 passes through the first transition track segment 15, the airtightness detection box 3 gradually changes from an open state to a closed state. When the guide roller 12 passes through the second transition track segment 16, the airtightness detection box 3 gradually changes from a closed state to an open state.

[0071] The opening and closing track 4 only requires controlling the height change of the guide roller 12 to achieve the opening and closing control of the pressure cover 7 and the base 6. Compared with the existing cam frame structure, it is simpler and has lower manufacturing and processing costs. The opening and closing track 4 has a simple structure, consisting only of a first height track section 13, a second height track section 14, a first transition track section 15, and a second transition track section 16. By changing the height difference, the height change of the guide roller 12 is controlled, thereby achieving the opening and closing control of the airtightness detection box 3.

[0072] As an example of this embodiment, please refer to the appendix to the specification. Figure 5 Appendix Figure 17 and attached Figure 18 As shown, the opening and closing track 4 is formed by the clamping of the first limiting rod 17 and the second limiting rod 18 arranged vertically.

[0073] As another example of this embodiment, refer to the appendix to the specification. Figure 4 As shown, a qualified product blowing element 19 is provided on the inner side of the end of the second transition track section 16 for blowing the packaged goods 44 that have passed inspection and are deemed good out of the opened airtightness testing box 3. A defective product blowing element 20 is provided on the inner side of the second height track section 14 for blowing the packaged goods 44 that have passed inspection and are deemed defective out of the airtightness testing box 3. A defective product hopper 21 is provided on the frame 1, and the defective product hopper 21 is correspondingly located on the outer side of the airtightness testing box 3 corresponding to the defective product blowing element 20.

[0074] Since the movement trajectory of the airtightness testing box 3 is rectangular, feeding or discharging can be set when the airtightness testing box 3 is in the open state. Taking the two long sides and two short sides as an example, one section of one of the long sides can be set as the second height track segment 14, so that the two short sides and the other long side are all the first height track segments 13. When the airtightness testing box 3 is in the closed state, the airtightness test can be performed, which can minimize the size of the equipment and the area occupied while meeting the testing time requirements.

[0075] Example 3

[0076] As another preferred embodiment of the present invention, this embodiment is a further detailed supplement and explanation of the technical solution of the present invention based on the above embodiment 1 or embodiment 2.

[0077] In this embodiment, refer to the appendix to the specification. Figure 7 To be continued Figure 16As shown, the transmission assembly includes a first support shaft 22, a first connecting rod 23, and an auxiliary opening / closing component 24; a pair of first support ear plates and a pair of second support ear plates are provided on the base 6, the two first support ear plates 25 of the first support ear plate pair are spaced apart by a predetermined distance and located at one end of the pressure cover 7; the two second support ear plates 26 of the second support ear plate pair are respectively located on both sides of the pressure cover 7; a first oblong hole 27 is provided on the first support ear plate 25, and the first support shaft 22 is slidably assembled in the first oblong hole 27 of the first support ear plate pair; the first connecting rod 23 is a first support shaft 22, a first connecting rod 23, and an auxiliary opening / closing component 24; the first connecting rod 22 is a first support shaft 22, a first connecting rod 23, and an auxiliary opening / closing component 24; a pair of first support ear plates 22 and a pair of second support ear plates 24 are provided on the base 6, the two first support ear plates 25 are spaced apart by a predetermined distance and located at one end of the pressure cover 7; the two second support ear plates 26 are located on both sides of the pressure cover 7; the first support ear plate 25 is provided with a first oblong hole 27, and the first support shaft 22 is slidably assembled in the first oblong hole 27 of the first support ear plate pair; the first connecting rod 22 is a first support shaft 22, a first connecting rod 23, and an auxiliary opening / closing component 24 ... The middle part of the rod 23 is sleeved on the first support shaft 22; the auxiliary opening and closing part 24 is provided with three hinge parts, the first hinge part 28 is hinged to the pressure cover 7, the second hinge part 29 is hinged to the first support ear plate, and the third hinge part 30 is hinged to the lower end of the first connecting rod 23; the guide roller 12 is provided at the upper end of the first connecting rod 23, and the axial direction of the guide roller 12 is parallel to the base 6; the second support ear plate 26 is provided with a second waist-shaped hole 31, and rollers 32 are respectively provided on both sides of the pressure cover 7, and the rollers 32 are slidably fitted in the second waist-shaped hole 31.

[0078] By configuring the first pair of supporting ear plates, the second pair of supporting ear plates, the first oblong hole 27, the second oblong hole 31, the first connecting rod 23, the first supporting shaft 22, and the auxiliary opening and closing component 24, the roller can perform reciprocating motion in only one direction to achieve the opening and closing between the cover 7 and the base plate. When designing the motion trajectory, only a change in the motion trajectory in one direction needs to be designed, that is, the up and down movement of the guide roller 12 can achieve stable opening and closing between the cover 7 and the base plate, simplifying the design requirements for the opening and closing motion trajectory of the airtightness testing box 3, thereby reducing its manufacturing cost.

[0079] By setting up the first pair of supporting ear plates, the second pair of supporting ear plates, the first waist-shaped hole 27, the second waist-shaped hole 31, the first connecting rod 23, the first supporting shaft 22 and the auxiliary opening and closing component 24, the trajectory of the cover 7 when it leaves the base 6 is a straight trajectory. That is, the cover 72 is subjected to uniform force when it separates from the base 6, avoiding the situation where the sealing performance is reduced due to uneven force on the cover 7 (such as one end of the cover 7 opening first and the other end opening later).

[0080] With attachment Figure 17 Appendix Figure 18 and attached Figure 19 The opening and closing motion of the airtightness testing box 3 will be explained using the shown motion trajectory as an example. (See attached instruction manual.) Figure 7 Appendix Figure 9 Appendix Figure 11 Appendix Figure 13 and attached Figure 15As shown, when the cover 7 of the airtightness testing box 3 is pressed onto the base 6, i.e., when the airtightness testing box 3 is in the closed state, the first support shaft 22 is located at the uppermost end of the first oblong hole 27, and the rollers 32 on both sides of the cover 7 are located at the lowermost end of the second oblong hole 31. When it is necessary to open the cover 7, the guide roller 12 is restricted by the first limiting rod 17 and the second limiting rod 18, and moves downward. Through the first connecting rod 23, it drives the first support shaft 22 to move downward. The lower part of the first connecting rod 23 rotates relative to the third hinge part 30. At the same time, the auxiliary opening and closing member 24 rotates around the second hinge part 29, causing the cover 7 to leave the base 6. As the cover 7 leaves the base 6, under the restriction of the second oblong hole 31, the cover 7 rotates relative to the auxiliary opening and closing member 24 around the first hinge part 28, so that the open posture of the cover 7 is one end with a large opening and the other end with a small opening. Refer to the attached instruction manual. Figure 8 Appendix Figure 10 Appendix Figure 12 Appendix Figure 14 and attached Figure 16 As shown, when the pressure cap 7 is in the open state, the first support shaft 22 is located at the lower end of the first waist-shaped hole 27, and the rollers 32 at both ends of the pressure cap 7 are located at the upper end of the second waist-shaped hole 31.

[0081] In a preferred embodiment of this invention, the guide roller 12 is mounted on the end of the first connecting rod 23 via the mounting member 33, and the axial direction of the guide roller 12 is perpendicular to the length direction of the first connecting rod 23. The roller is fixed relative to and perpendicular to the first connecting rod 23, and the lifting and lowering of the roller is transmitted to the first support shaft 22 through the first connecting rod 23, ensuring that the opening and closing of the pressure cover 7 can be achieved by moving the roller up and down.

[0082] Furthermore, limiting rollers 34 are respectively provided at both ends of the first support shaft 22, and the limiting rollers 34 are fitted with the first waist-shaped hole 27; the limiting rollers 34 are provided with limiting steps 35. The limiting rollers 34 ensure the stable movement of the first support shaft 22 in the first waist-shaped hole 27, and limit the first support shaft 22 from disengaging from the first waist-shaped hole 27.

[0083] As an example of this embodiment, please refer to the appendix to the specification. Figure 11 and attached Figure 12As shown, the first waist-shaped hole 27 is arc-shaped. The second waist-shaped hole 31 is a straight waist-shaped hole with an inclined arrangement, and the end of the second waist-shaped hole 31 away from the base 6 is inclined towards the first support ear plate. The size and trajectory of the second waist-shaped hole 31 and the first waist-shaped hole 27 enable control over the opening and closing angle of the cover 7, i.e., the opening and closing swing amplitude. The inclined arrangement of the second waist-shaped hole 31 makes the cover 7, when fully open, present a shape with one end having a large opening and the other end having a small opening. The end with the larger opening is used to receive the packaged product 44 to be tested. It also minimizes the displacement of the guide roller 12, avoiding the need for the guide roller 12 to have a large displacement to fully open the cover 7, further reducing the design requirements and manufacturing costs for the movement trajectory of the opening and closing airtightness testing box 3. At the same time, the first waist-shaped hole 27 and the second waist-shaped hole 31 also serve as a limit to prevent the cover 7 from being over-opened or over-closed.

[0084] To further improve the sealing performance between the gland 7 and the base 6, a sealing gasket 36 is provided at the edge where the gland 7 contacts the base 6.

[0085] Further, please refer to the appendix to the instruction manual. Figure 8 Appendix Figure 10 Appendix Figure 12 Appendix Figure 14 and attached Figure 16 As shown, the base 6 is provided with a pair of side baffles 37 and a front baffle 38, which form a receiving slot for receiving the packaged product 44 to be tested. This receiving slot is located inside the sealed testing chamber. The side baffles 37 and front baffles 38 on the base 6 facilitate the conveying and positioning of the packaged product 44 to be tested, which is beneficial for the online continuous testing of the packaged product 44.

[0086] For further optimization, please refer to the attached instruction manual. Figure 16 As shown, a notch 39 is provided between the front baffle 38 and the base 6. Through this notch 39, the tested package 44 can be blown away from the air tightness test box 3 by the air blowing component.

[0087] Example 4

[0088] As another preferred embodiment of this utility model, please refer to the appendix to the specification. Figure 6As shown, this embodiment discloses a horizontal online airtightness testing system, including a feeding conveyor line 41 and a discharging conveyor line 42. A horizontal online airtightness testing device as described in Embodiments 1, 2, or 3 is disposed between the feeding conveyor line 41 and the discharging conveyor line 42. The feeding conveyor line 41 is connected to an open airtightness testing box 3 located at the second height track section 14 or the connection point between the second height track section 14 and the first transition track section 15 in the horizontal online airtightness testing device, for inputting the packaged product 44 to be tested into the airtightness testing box 3. The discharging conveyor line 42 is correspondingly disposed outside the airtightness testing box 3 corresponding to the qualified product blowing element 19, and the qualified product blowing element 19 blows the tested and qualified packaged product 44 onto the discharging conveyor line 42.

[0089] As one embodiment of this invention, a clamping conveyor mechanism 43 is provided between the feeding conveyor line 41 and the horizontal online airtightness testing device. The clamping conveyor mechanism 43 includes a pair of clamping conveyor belts arranged opposite to each other. The clamping conveyor mechanism 43 clamps and conveys the packaged product 44 to be tested conveyed by the feeding conveyor line 41 to the open airtightness testing box 3.

Claims

1. A horizontal online airtightness testing device, characterized in that: It includes a frame (1), a servo drive mechanism (2), multiple airtightness testing boxes (3), an opening and closing track (4), and a synchronous rotating tower assembly (5), wherein the servo drive mechanism (2), the opening and closing track (4), and the synchronous rotating tower assembly (5) are all mounted on the frame (1); The projection of the servo drive mechanism (2) on the horizontal plane is a rectangle with rounded corners. Multiple airtightness detection boxes (3) are evenly distributed around the servo drive mechanism (2) and connected to the servo drive mechanism (2). They are driven by the servo drive mechanism (2) to move cyclically in a set direction. The motion trajectory of the airtightness detection box (3) driven by the servo drive mechanism (2) is a rectangle with rounded corners on the horizontal plane. The airtightness testing box (3) includes a base (6) and a pressure cover (7). A sealed testing cavity for accommodating the packaged product (44) to be tested is formed between the base (6) and the pressure cover (7). An air pipe connector (8) and a pressure sensor (9) for detecting changes in gas pressure inside the sealed testing cavity are provided on the pressure cover (7). The synchronous rotating tower assembly (5) is provided with a connecting line connected to the pressure sensor (9) and an air pipe (10) connected to the air pipe connector (8). The synchronous rotating tower assembly (5) rotates synchronously with the airtightness testing box (3) under the drive of its synchronous drive mechanism (11). The pressure cap (7) is connected to the base (6) through a transmission assembly. The transmission assembly is connected to a guide roller (12). The guide roller (12) is assembled in the opening and closing track (4). The projection of the opening and closing track (4) on the horizontal plane is a rectangle with rounded corners. The opening and closing track (4) restricts the height change of the guide roller (12) to realize the opening and closing control of the airtightness test box (3).

2. The horizontal online airtightness testing device as described in claim 1, characterized in that: The opening and closing track (4) includes a first height track segment (13), a second height track segment (14), a first transition track segment (15), and a second transition track segment (16). The height of the first height track segment (13) is higher than the height of the second height track segment (14). The first transition track segment (15) is connected to the first height track segment (13) by the second height track segment (14), and the second transition track segment (16) is connected to the second height track segment (14) by the first height track segment (13). The guide roller (12) is located at the first height. When the guide roller (12) is in the second height track section (14), the cover (7) is pressed against the base (6) and the airtightness test box (3) is in the closed state; when the guide roller (12) is in the second height track section (14), the cover (7) leaves the base (6) and the airtightness test box (3) is in the open state; when the guide roller (12) passes through the first transition track section (15), the airtightness test box (3) gradually changes from the open state to the closed state; when the guide roller (12) passes through the second transition track section (16), the airtightness test box (3) gradually changes from the closed state to the open state.

3. The horizontal online airtightness testing device as described in claim 1 or 2, characterized in that: The opening and closing track (4) is formed by the first limiting rod (17) and the second limiting rod (18) arranged vertically.

4. The horizontal online airtightness testing device as described in claim 2, characterized in that: An air blowing device (19) is provided on the inner side of the end of the second transition track section (16) for blowing the qualified packaged product (44) that has been tested and is good out of the opened airtightness test box (3).

5. The horizontal online airtightness testing device as described in claim 2, characterized in that: Inside the second height track section (14), there is a non-conforming air blowing component (20) for blowing out the unconforming packaged goods (44) that have been tested and are defective from the airtightness test box (3).

6. The horizontal online airtightness testing device as described in claim 5, characterized in that: The frame (1) is provided with a non-conforming product hopper (21), which is located on the outside of the airtightness test box (3) corresponding to the non-conforming product blowing component (20).

7. The horizontal online airtightness testing device as described in claim 1, 2, 4, 5 or 6, characterized in that: The transmission assembly includes a first support shaft (22), a first connecting rod (23), and an auxiliary opening and closing component (24); a pair of first support ear plates and a pair of second support ear plates are provided on the base (6), the two first support ear plates (25) of the first support ear plate pair are spaced apart by a set distance and located at one end of the pressure cap (7); the two second support ear plates (26) of the second support ear plate pair are respectively located on both sides of the pressure cap (7); a first waist-shaped hole (27) is provided on the first support ear plate (25), and the first support shaft (22) is slidably assembled in the first waist-shaped hole (27) of the first support ear plate pair; the first connecting rod (23) The middle part is sleeved on the first support shaft (22); the auxiliary opening and closing part (24) is provided with three hinge parts, the first hinge part (28) is hinged to the cover (7), the second hinge part (29) is hinged to the first support ear plate, and the third hinge part (30) is hinged to the lower end of the first connecting rod (23); the guide roller (12) is provided at the upper end of the first connecting rod (23), and the axial direction of the guide roller (12) is parallel to the base (6); the second support ear plate (26) is provided with a second waist-shaped hole (31), and rollers (32) are respectively provided on both sides of the cover (7), and the rollers (32) slide in the second waist-shaped hole (31).

8. The horizontal online airtightness testing device as described in claim 7, characterized in that: The guide roller (12) is mounted on the end of the first link (23) via the mounting member (33), and the axial direction of the guide roller (12) is perpendicular to the length direction of the first link (23).

9. The horizontal online airtightness testing device as described in claim 7, characterized in that: The first support shaft (22) is provided with limiting rollers (34) at both ends, and the limiting rollers (34) are fitted with the first waist-shaped hole (27); the limiting rollers (34) are provided with limiting steps (35).

10. The horizontal online airtightness testing device as described in claim 7, characterized in that: The first waist-shaped hole (27) is arc-shaped.

11. The horizontal online airtightness testing device as described in claim 7, characterized in that: The second waist-shaped hole (31) is a straight waist-shaped hole with an inclination, and the end of the second waist-shaped hole (31) away from the base (6) is inclined toward the first support ear plate.

12. The horizontal online airtightness testing device as described in claim 1, 2, 4, 5 or 6, characterized in that: A sealing gasket (36) is provided on the edge of the pressure cap (7) that contacts the base (6).

13. The horizontal online airtightness testing device as described in claim 1, 2, 4, 5 or 6, characterized in that: The base (6) is provided with a pair of side baffles (37) and a front baffle (38), which form a receiving slot for receiving the packaged item (44) to be tested, and the receiving slot is located inside the sealed testing cavity.

14. The horizontal online airtightness testing device as described in claim 13, characterized in that: A notch (39) is provided between the front baffle (38) and the base (6).

15. The horizontal online airtightness testing device as described in claim 1, 2, 4, 5 or 6, characterized in that: The synchronous rotating tower assembly (5) is equipped with an electromagnetic valve group (40), which is used to control the air pipe (10) to draw or blow air into the airtightness detection box (3).

16. A horizontal online airtightness testing system, characterized in that... The device includes a feeding conveyor line (41) and a discharging conveyor line (42). A horizontal online airtightness testing device as described in any one of claims 1-15 is provided between the feeding conveyor line (41) and the discharging conveyor line (42). The feeding conveyor line (41) is connected to the airtightness testing box (3) in the horizontal online airtightness testing device, which is in an open state at the connection between the second height track section (14) or the second height track section (14) and the first transition track section (15), for inputting the packaged product (44) to be tested into the airtightness testing box (3). The discharging conveyor line (42) is correspondingly set outside the airtightness testing box (3) corresponding to the qualified product blowing component (19), and the qualified product blowing component (19) blows the tested and good packaged product (44) onto the discharging conveyor line (42).

17. The horizontal online airtightness testing system as described in claim 16, characterized in that: A clamping conveyor mechanism (43) is provided between the feeding conveyor line (41) and the horizontal online air tightness testing equipment. The clamping conveyor mechanism (43) includes a pair of clamping conveyor belts arranged opposite to each other. The clamping conveyor mechanism (43) clamps and conveys the packaged product (44) to be tested conveyed by the feeding conveyor line (41) to the open air tightness testing box (3).

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