A cigarette package online air tightness detection device

Abstract

The utility model relates to the technical field of the cigarette package airtightness detection, concretely relates to a kind of cigarette package online airtightness detection device, including rack, carousel is rotationally arranged on rack, still including the detection support being set on rack and being located carousel side, the detection motor being set on the outer side of detection support, the lead screw and sliding rail being set in the inner side of detection support, first sliding seat and second sliding seat are slidably sleeved on lead screw, first slider and second slider are respectively arranged on the upper end of first sliding seat and second sliding seat, first sealing plate and second sealing plate are respectively arranged on the lower end of first sliding seat, and a plurality of detection boxes are annularly arranged on the upper end of carousel and are spaced apart.The design adopts the method of negative pressure detection, effectively realizes the airtightness detection of small-box cigarette package transparent paper, and the structure is low in complexity, small in size and high in detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of tobacco pack airtightness testing technology, specifically to an online tobacco pack airtightness testing device. Background Technology

[0002] The sealing performance of the transparent paper in cigarette packs is one of the key factors in ensuring cigarette quality. A good seal effectively prevents cigarettes from getting damp or developing odors, maintaining their original taste and flavor, and extending their shelf life. If the transparent paper leaks, the cigarettes will be adversely affected by the external environment during storage and transportation, seriously impacting product quality and consumer experience.

[0003] There are two main methods for detecting the transparent paper in small cigarette packs. One method is to add an image detection mechanism to the packaging machine to detect defects in the appearance of the transparent paper, but it cannot directly detect the airtightness of the transparent paper. The other method is to use a separate airtightness detection device for negative pressure detection, which is difficult to adapt to existing packaging machines to form a continuous operation. In addition, it has a complex structure, large size, low detection efficiency, and high cost.

[0004] For example, the published document with publication number CN118111631A, entitled "A sealing detection device and a leak analysis method for cigarette boxes," can detect the airtightness of the transparent paper of small cigarette packs, but the device has a complex structure, large size, low detection efficiency, and cannot be adapted to existing packaging machines. Utility Model Content

[0005] This invention addresses the technical problems of existing small cigarette pack transparent paper airtightness testing equipment, which suffers from complex structure, large size, low testing efficiency, and high cost. It provides an online cigarette pack airtightness testing device that effectively detects the airtightness of small cigarette pack transparent paper, while having a low structural complexity, small size, and high testing efficiency.

[0006] The technical solution adopted by this utility model is to provide an online airtightness testing device for cigarette packs, including a frame, a turntable rotatably mounted on the frame, a testing bracket mounted on the frame and located on one side of the turntable, a testing motor mounted on the outside of the testing bracket, a lead screw and a slide rail mounted on the inside of the testing bracket, a first slide block and a second slide block slidably mounted on the lead screw, a first slider and a second slider respectively mounted on the upper ends of the first slide block and the second slide block, a first sealing plate and a second sealing plate respectively mounted on the lower end of the first slide block, and a plurality of testing boxes arranged in a ring on the upper end of the turntable and spaced apart. The detection box has a box structure with openings on both the inner and outer sides. The circular motion trajectory of the detection box passes between the first sealing plate and the second sealing plate. The first sealing plate and the second sealing plate correspond to and are adapted to the openings on the inner and outer sides of the detection box, respectively. One end of the slide rail is fixed on the detection bracket, and the other end extends towards the center of the turntable. The lead screw is located below the slide rail and above the detection box. One end of the lead screw is connected to the drive end of the detection motor, and the other end extends towards the center of the turntable and is parallel to the slide rail. The upper ends of the first slider and the second slider are provided with sliding grooves and are slidably connected to the slide rail. The detection motor drives the lead screw to rotate, causing the first sealing plate and the second sealing plate to translate towards the inner and outer sides of the detection box, respectively.

[0007] The detection bracket includes an outer plate fixed to the frame and located next to the turntable, a horizontal plate fixed to the inner side of the outer plate and extending towards the center of the turntable, an inner plate disposed at the inner end of the horizontal plate and corresponding to the outer plate, the inner end of the lead screw being rotatably disposed on the inner plate, and the slide rail being fixed at the lower end of the horizontal plate and located between the outer plate and the inner plate.

[0008] The detection box includes a bottom plate, a left side plate, a right side plate, a top plate, and a partition disposed between the left side plate and the right side plate. The bottom plate, the left side plate, the right side plate, and the top plate together form a rectangular frame structure, and the partition is horizontally fixed between the left side plate and the right side plate.

[0009] The upper end of the partition plate and the upper end of the bottom plate are provided with long grooves facing inward and outward.

[0010] The upper surface of the partition plate facing both the inner and outer ends is provided with an inclined surface.

[0011] It also includes a rejection mechanism, which includes a rejection bracket mounted on the frame and located at the middle of the upper end of the turntable, a rejection motor and a smoke filling chamber mounted on the rejection bracket, a fixed seat mounted on the rejection bracket, a slide rod slidably mounted on the fixed seat, a smoke pushing block mounted on one end of the slide rod, and a crank connecting rod connecting the other end of the slide rod and the drive end of the rejection motor. The bottom of the smoke filling chamber has a smoke pushing port and a smoke outlet horizontally arranged on the inner and outer sides. The smoke outlet is horizontally aligned with the inner opening of the detection box. The smoke pushing block is horizontally aligned with the smoke pushing port. The rejection motor drives the slide rod to move horizontally towards the inner side of the detection box on the fixed seat via a crank connecting rod. The horizontal movement of the slide rod drives the smoke pushing seat to move horizontally towards the smoke pushing port of the smoke filling chamber.

[0012] A smoke-blocking mechanism is provided on one side of the rejection bracket. The smoke-blocking mechanism includes a smoke-blocking bracket with one end fixed to the rejection bracket and a smoke-blocking plate disposed on the smoke-blocking bracket. The outer end of the smoke-blocking bracket extends toward the detection box, and the smoke-blocking plate is fixed on the extended end of the smoke-blocking bracket and corresponds to the inner opening of the detection box.

[0013] The smoke filling chamber is a long, vertically arranged rectangular cavity structure.

[0014] The rejection mechanism also includes a smoke guiding mechanism located outside the detection box and corresponding to the smoke pusher. The smoke guiding mechanism includes a support plate fixed on the frame, a smoke exhaust port on the support plate, an upper support spring and a lower support spring respectively located at the upper and lower ends of the smoke exhaust port, an upper smoke exhaust roller rotatably mounted on the upper support spring and located inside the upper side of the smoke exhaust port, and a lower smoke exhaust roller rotatably mounted on the lower support spring and located inside the lower side of the smoke exhaust port. The size of the smoke exhaust port is larger than the outer opening of the detection box, and the distance between the upper and lower smoke exhaust rollers is smaller than the height of the outer opening of the detection box.

[0015] The beneficial effects of this utility model are that it provides an online airtightness detection device for cigarette packs. A detection motor drives a lead screw to rotate, causing the first and second sealing plates to move relative to each other and press against the openings on both sides of the detection box, sealing the box. In this sealed state, negative pressure gas is introduced into the detection box through a pipeline via an air source. A negative pressure sensor collects the negative pressure data inside the detection box, and the pressure change curve is used to determine whether the transparent paper of the cigarette pack is leaking. This design only requires modification to the existing rotary station of the YB55 packaging machine, without changing the upstream and downstream mechanisms of the packaging machine. It is compatible with the existing assembly line operation of the packaging machine. This design uses a negative pressure detection method to effectively detect the airtightness of the transparent paper of small cigarette packs. It has low structural complexity, small size, and high detection efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the detection bracket and the first sealing plate in this utility model; Figure 3 This is a schematic diagram of the detection bracket and the first sealing plate from another direction in this utility model; Figure 4 This is a schematic diagram of the detection box in this utility model; Figure 5 This is a schematic diagram of the structure of this utility model with added smoke chamber and removed support; Figure 6 This is a schematic diagram of the structure of this utility model with the smoke chamber added and the support removed from another direction; Figure 7 This is a schematic diagram of the smoke guiding mechanism in this utility model; Figure 8 This is a reference diagram showing the application of this utility model on a packaging machine.

[0017] In the attached diagram, 1 is the frame, 2 is the turntable, 3 is the detection bracket, 4 is the detection motor, 5 is the lead screw, 6 is the slide rail, 7 is the first slide block, 8 is the second slide block, 9 is the first slider, 10 is the second slider, 11 is the first sealing plate, 12 is the second sealing plate, 13 is the detection box, 14 is the outer vertical plate, 15 is the horizontal plate, 16 is the inner vertical plate, 17 is the bottom plate, 18 is the left side plate, 19 is the right side plate, and 20 is the top plate. Plate, 21 is partition, 22 is long groove, 23 is inclined surface, 24 is smoke filling chamber, 25 is rejection bracket, 26 is rejection motor, 27 is fixed seat, 28 is slide rod, 29 is smoke pusher block, 30 is crank connecting rod, 31 is smoke baffle bracket, 32 is smoke baffle plate, 33 is support plate, 34 is smoke exhaust port, 35 is upper support spring, 36 is lower support spring, 37 is upper smoke exhaust roller, 38 is lower smoke exhaust roller. Detailed Implementation

[0018] like Figure 1-4 and Figure 8 As shown, this utility model provides an online airtightness testing device for cigarette packs, including a frame 1, a turntable 2 rotatably mounted on the frame 1, a testing bracket 3 mounted on the frame 1 and located on one side of the turntable 2, a testing motor 4 mounted on the outside of the testing bracket 3, a lead screw 5 and a slide rail 6 mounted on the inside of the testing bracket 3, a first slide block 7 and a second slide block 8 slidably mounted on the lead screw 5, a first slider 9 and a second slider 10 respectively mounted on the upper ends of the first slide block 7 and the second slide block 8, a first sealing plate 11 and a second sealing plate 12 respectively mounted on the lower end of the first slide block 7, and a plurality of testing boxes 13 arranged in a ring on the upper end of the turntable 2 at intervals; the testing boxes 13 have a box structure with openings on both the inner and outer sides, and the testing... The circular motion trajectory of the test box 13 passes between the first sealing plate 11 and the second sealing plate 12. The first sealing plate 11 and the second sealing plate 12 correspond to and are adapted to the openings on the inner and outer sides of the test box 13, respectively. One end of the slide rail 6 is fixed on the test bracket 3, and the other end extends towards the center of the turntable 2. The lead screw 5 is located below the slide rail 6 and above the test box 13. One end of the lead screw 5 is connected to the drive end of the test motor 4, and the other end extends towards the center of the turntable 2 and is parallel to the slide rail 6. The upper ends of the first slider 9 and the second slider 10 are provided with sliding grooves and are slidably connected to the slide rail 6. The test motor 4 drives the lead screw 5 to rotate, causing the first sealing plate 11 and the second sealing plate 12 to translate towards the inner and outer sides of the test box 13, respectively.

[0019] The frame 1 and turntable 2 are the existing structure of the YB55 packaging machine. The turntable 2 is rotatably mounted on the frame 1 and rotates under the drive of the packaging machine's drive mechanism. One side of the turntable 2 is the feeding station, and the opposite side is the discharging station. After the cigarette packs are conveyed onto the turntable 2, they move in a circular motion as the turntable 2 rotates, and inspection is carried out during this period.

[0020] The test box 13 adopts a box-type structure with openings on both the inner and outer sides. The inner side refers to the side facing the center of the turntable 2, and the outer side refers to the side facing the outside of the turntable 2. Multiple test boxes 13 are arranged in a ring on the turntable 2. The cigarette packs are driven by the original conveying mechanism and enter the test box 13 at the loading station of the turntable 2. After the cigarette packs are loaded into the test box 13, they move to the space between the first sealing plate 11 and the second sealing plate 12 under the drive of the turntable 2, which is the airtightness test station.

[0021] The lead screw 5 is a forward and reverse rotating lead screw structure. The detection bracket 3 is fixed on the original frame 1 of the packaging machine and is used to install the detection motor 4, lead screw 5, slide rail 6, first slide 7, second slide 8, first slider 9, second slider 10, first sealing plate 11 and second sealing plate 12. The upper end of the first slider 9 and the second slider 10 is provided with a sliding groove, which forms a sliding connection with the slide rail 6. The sliding groove adopts a constricted groove structure, such as a dovetail groove, which plays a supporting and stabilizing role for the first slide 7 and the second slide 8.

[0022] The first slide 7 and the second slide 8 are mounted on the lead screw 5. During operation, the detection motor 4 drives the lead screw 5 to rotate, causing the first slide 7 and the second slide 8 on the lead screw 5 to move relative to each other. The first sealing plate 11 and the second sealing plate 12 at the lower ends of the first slide 7 and the second slide 8 move relative to each other synchronously until they press against the openings on both sides of the detection box 13, sealing the detection box 13.

[0023] In a sealed state, the detection box 13 is equipped with an air source and a negative pressure sensor at a suitable position on the frame 1. The first sealing plate 11 or the second sealing plate 12 is provided with an air port. The air source is connected to the air port through a pipeline and introduces negative pressure gas into the detection box 13. The sensing end of the negative pressure sensor is also connected to the inside of the detection box 13 through another air port. The negative pressure status data inside the detection box 13 is collected. Based on the air pressure change curve collected by the negative pressure sensor, the leakage status of the cigarette pack inside the detection box 13 is determined, and it is determined whether there is leakage in the transparent paper of the cigarette pack.

[0024] like Figure 2-3 As shown, the detection bracket 3 includes an outer plate 14 fixed to the frame 1 and located next to the turntable 2, a horizontal plate 15 fixed to the inner side of the outer plate 14 and extending toward the center of the turntable 2, and an inner plate 16 disposed at the inner end of the horizontal plate 15 and corresponding to the outer plate 14. The inner end of the lead screw 5 is rotatably disposed on the inner plate 16, and the slide rail 6 is fixed at the lower end of the horizontal plate 15 and located between the outer plate 14 and the inner plate 16.

[0025] The detection bracket 3 is designed as a cantilever structure, and the inner end of the lead screw 5 is rotatably mounted on the inner vertical plate 16 through a bearing seat, making the rotation of the lead screw 5 more stable.

[0026] like Figure 4As shown, the detection box 13 includes a bottom plate 17, a left side plate 18, a right side plate 19, a top plate 20, and a partition 21 disposed between the left side plate 18 and the right side plate 19. The bottom plate 17, the left side plate 18, the right side plate 19 and the top plate 20 together form a rectangular frame structure, and the partition 21 is horizontally fixed between the left side plate 18 and the right side plate 19.

[0027] The detection box 13 adopts a rectangular frame structure with openings on both the inner and outer sides. Its inner cavity is divided into two parts by a partition 21. Each inner cavity is adapted to the size of a cigarette pack, that is, the detection box 13 can hold two cigarette packs at the same time, further improving the detection efficiency.

[0028] like Figure 4 As shown, the upper end of the partition plate 21 and the upper end of the bottom plate 17 are provided with long grooves 22 facing inward and outward.

[0029] The length direction of the long groove 22 is consistent with the direction in which the cigarette pack enters and slides out of the detection box 13, thereby reducing the contact area between the cigarette pack and the detection box 13 when the cigarette pack slides and reducing friction.

[0030] like Figure 4 As shown, the upper surface of the partition 21 facing both the inner and outer ends is provided with an inclined surface 23.

[0031] The inclined surface 23 on the partition 21 makes it easier and more precise for the cigarette pack to enter and slide out.

[0032] like Figure 1 and Figure 5-6 As shown, it also includes a rejection mechanism, which includes a rejection bracket 25 mounted on the frame 1 and located at the upper center of the turntable 2, a rejection motor 26 and a smoke filling chamber 24 mounted on the rejection bracket 25, a fixed seat 27 mounted on the rejection bracket 25, a slide rod 28 slidably mounted on the fixed seat 27, a smoke pushing block 29 mounted on one end of the slide rod 28, and a crank connecting rod 30 connecting the other end of the slide rod 28 and the drive end of the rejection motor 26; the bottom inner and outer sides of the smoke filling chamber 24 are horizontally provided with a smoke pushing port and a smoke outlet, the smoke outlet is horizontally corresponding to the inner opening of the detection box 13, the smoke pushing block 29 is horizontally corresponding to the smoke pushing port, the rejection motor 26 drives the slide rod 28 to move inward toward the inner side of the detection box 13 on the fixed seat 27 by means of the crank connecting rod 30, the movement of the slide rod 28 drives the smoke pushing seat to move inward toward the smoke pushing port of the smoke filling chamber 24.

[0033] The rejection bracket 25 is fixed on the frame 1 of the original packaging machine and suspended in the middle of the upper end of the turntable 2. It is used to install the cigarette filling chamber 24 and other rejection components. The cigarette filling chamber 24 contains a vertically arranged row of cigarette packs, which are good cigarette packs that have passed the test. The cigarette outlet on the outside of the cigarette filling chamber 24 is adjacent to and corresponds to the opening on the inside of the cigarette filling chamber 24. The cigarette pushing port on the inside of the cigarette filling chamber 24 is adjacent to and corresponds to the cigarette pushing block 29. The dimensions of the inner opening, cigarette outlet, cigarette pushing port and cigarette pushing block 29 of the detection box 13 are all compatible. For example, when the inner cavity size and the two side openings of the detection box 13 are compatible with two cigarette packs, the dimensions of the cigarette outlet, cigarette pushing port and cigarette pushing block 29 are compatible with the dimensions of the two cigarette packs. The dimensions are not limited and can be designed according to the needs and actual conditions.

[0034] The fixed base 27 has a horizontal sliding hole, and the slide rod 28 is slidably inserted into the sliding hole of the fixed base 27. The crank connecting rod 30 is the transmission mechanism between the rejection motor 26 and the slide rod 28, which converts the rotational motion of the rejection motor 26 into translational motion, so that the rejection motor 26 can drive the slide rod 28 to perform telescopic translation. During operation, after the airtightness test of the test box 13 is completed, the turntable 2 continues to rotate, driving the test box 13 into the rejection station. If the airtightness test of the cigarette packs in the test box 13 fails, the rejection motor 26 starts working, driving the slide rod 28 to extend and retract on the fixed seat 27 via the crank connecting rod 30. The slide rod 28 drives the pusher block 29 to move towards the pusher opening of the cigarette filling chamber 24, pushing the good cigarette packs in the cigarette filling chamber 24 into the test box 13. The bad cigarette packs in the test box 13 fall out through the outer opening of the test box 13 under the push of the good cigarette packs, and the test box 13 is replaced with good cigarette packs. The replacement of good cigarette packs with bad cigarette packs does not affect subsequent processes.

[0035] like Figure 5-6 As shown, a smoke-blocking mechanism is provided on one side of the rejection bracket 25. The smoke-blocking mechanism includes a smoke-blocking bracket 31 with one end fixed to the rejection bracket 25 and a smoke-blocking plate 32 provided on the smoke-blocking bracket 31. The outer end of the smoke-blocking bracket 31 extends toward the detection box 13, and the smoke-blocking plate 32 is fixed on the extended end of the smoke-blocking bracket 31 and corresponds to the inner opening of the detection box 13.

[0036] The smoke baffle 32 corresponds to the inner opening of the detection box 13 at the smoke inlet station of the turntable 2. When the cigarette pack enters the detection box 13, it restricts the cigarette pack and prevents the cigarette pack from sliding out of the detection box 13 due to inertia, thereby improving the accuracy and stability of the cigarette pack entering the detection box 13.

[0037] like Figure 5 As shown, the cigarette filling chamber 24 is a long, vertically arranged rectangular cavity structure. The cigarette packs inside the cigarette filling chamber 24 are in a horizontally lying position, consistent with the position of the cigarette packs inside the detection box 13.

[0038] like Figure 5 and Figure 7 As shown, the rejection mechanism also includes a smoke guiding mechanism located outside the detection box 13 and corresponding to the smoke pusher 29. The smoke guiding mechanism includes a support plate 33 fixed on the frame 1, a smoke exhaust port 34 disposed on the support plate 33, an upper support spring 35 and a lower support spring 36 respectively disposed at the upper and lower ends of the smoke exhaust port 34, an upper smoke exhaust roller 37 rotatably disposed on the upper support spring 35 and located inside the upper side of the smoke exhaust port 34, and a lower smoke exhaust roller 38 rotatably disposed on the lower support spring 36 and located inside the lower side of the smoke exhaust port 34. The size of the smoke exhaust port 34 is larger than the outer opening of the detection box 13, and the distance between the upper smoke exhaust roller 37 and the lower smoke exhaust roller 38 is smaller than the height of the outer opening of the detection box 13.

[0039] Under the action of the rejection mechanism, the bad cigarette packs inside the detection box 13 are pushed out by the good cigarette packs. A smoke guiding mechanism is set at the opening on the outside of the detection box 13, which can dampen the cigarette packs inside the detection box 13 as they slide outward, effectively preventing the good cigarette packs from sliding out with inertia at the same time.

[0040] The support plate 33 is a vertically arranged plate structure, adjacent to and corresponding to the outer opening of the detection box 13. A smoke exhaust port 34 is provided on the support plate 33 at the position corresponding to the outer opening of the detection box 13. The size of the smoke exhaust port 34 is larger than the size of the outer opening of the detection box 13. An upper support spring 35 and a lower support spring 36 are fixed at the upper and lower ends of the smoke exhaust port 34, respectively. There are two upper support springs 35 fixed horizontally at intervals. The lower end of the upper support spring 35 extends into the smoke exhaust port 34. The two ends of the upper smoke exhaust roller 37 are installed on the two upper support springs 35. The upper smoke exhaust roller 37 can rotate. The lower support spring 36 and the lower smoke exhaust roller 38 have the same structure as the upper support spring 35 and the upper smoke exhaust roller 37. The upper support spring 35 and the lower support spring 36 are elastic metal sheet structures.

[0041] When the defective cigarette pack is pushed out of the detection box 13, because the distance between the upper exhaust roller 37 and the lower exhaust roller 38 is less than the opening height of the detection box 13, the upper and lower ends of the defective cigarette pack will press against the upper exhaust roller 37 and the lower exhaust roller 38 as it slides out. Under the pushing force of the good cigarette pack, the defective cigarette pack pushes the upper exhaust roller 37 outward and upward, and the lower exhaust roller 38 outward and downward, causing the upper exhaust roller 37 and the lower exhaust roller 38 to open until they are open to a degree suitable for the defective cigarette pack to slide out, with the upper and lower ends of the defective cigarette pack pressed tightly against the upper exhaust roller. The upper and lower exhaust rollers 37 and 38 slide out, and because they are self-rotating, the friction is low. After the bad cigarette pack slides out, the upper and lower exhaust rollers 37 and 38 return to their initial positions, blocking the good cigarette packs. Since the good cigarette packs have no subsequent pushing force, they will not push the upper and lower exhaust rollers 37 and 38, allowing them to enter the detection box 13 stably and accurately without sliding out. This also acts as a damping mechanism, preventing the bad cigarette packs from flying out and allowing them to fall stably into the collection box. As the turntable 2 continues to rotate, the detection box 13 moves to the discharge position, and discharge is completed using the original packaging machine's discharge mechanism.

Claims

1. An online airtightness testing device for cigarette packs, comprising a frame (1) and a turntable (2) rotatably mounted on the frame (1), characterized in that: It also includes a detection bracket (3) set on the frame (1) and located on one side of the turntable (2), a detection motor (4) set on the outside of the detection bracket (3), a lead screw (5) and a slide rail (6) set on the inside of the detection bracket (3), a first slide (7) and a second slide (8) slidably fitted on the lead screw (5), a first slider (9) and a second slider (10) respectively set on the upper ends of the first slide (7) and the second slide (8), a first sealing plate (11) and a second sealing plate (12) respectively set on the lower end of the first slide (7), and a plurality of detection boxes (13) arranged in a ring on the upper end of the turntable (2) and spaced apart. The detection box (13) has a box structure with openings on both the inner and outer sides. The circular motion trajectory of the detection box (13) passes between the first sealing plate (11) and the second sealing plate (12). The first sealing plate (11) and the second sealing plate (12) correspond to and are adapted to the openings on both the inner and outer sides of the detection box (13). One end of the slide rail (6) is fixed on the detection bracket (3), and the other end extends toward the center of the turntable (2). The lead screw (5) is spaced below the slide rail (6) and above the detection box (13). One end of the lead screw (5) is connected to the driving end of the detection motor (4), and the other end extends toward the center of the turntable (2) and is parallel to the slide rail (6). The upper ends of the first slider (9) and the second slider (10) are provided with sliding grooves and are slidably connected to the slide rail (6). The detection motor (4) drives the lead screw (5) to rotate, causing the first sealing plate (11) and the second sealing plate (12) to translate toward the inner and outer sides of the detection box (13) respectively.

2. The online airtightness testing device for cigarette packs according to claim 1, characterized in that: The detection bracket (3) includes an outer plate (14) fixed to the frame (1) and located next to the turntable (2), a horizontal plate (15) fixed to the inner side of the outer plate (14) and extending toward the center of the turntable (2), and an inner plate (16) set at the inner end of the horizontal plate (15) and corresponding to the outer plate (14). The inner end of the lead screw (5) is rotatably set on the inner plate (16), and the slide rail (6) is fixed at the lower end of the horizontal plate (15) and located between the outer plate (14) and the inner plate (16).

3. The online airtightness testing device for cigarette packs according to claim 1, characterized in that: The detection box (13) includes a bottom plate (17), a left side plate (18), a right side plate (19), a top plate (20), and a partition (21) disposed between the left side plate (18) and the right side plate (19). The bottom plate (17), the left side plate (18), the right side plate (19) and the top plate (20) together form a rectangular frame structure. The partition (21) is horizontally fixed between the left side plate (18) and the right side plate (19).

4. The online airtightness testing device for cigarette packs according to claim 3, characterized in that: The upper end of the partition (21) and the upper end of the bottom plate (17) are provided with long grooves (22) facing inward and outward.

5. The online airtightness testing device for cigarette packs according to claim 3, characterized in that: The upper surface of the partition (21) facing both the inner and outer ends is provided with an inclined surface (23).

6. The online airtightness testing device for cigarette packs according to claim 1, characterized in that: It also includes a rejection mechanism, which includes a rejection bracket (25) mounted on the frame (1) and located at the middle of the upper end of the turntable (2), a rejection motor (26) and a smoke filling chamber (24) mounted on the rejection bracket (25), a fixed seat (27) mounted on the rejection bracket (25), a slide rod (28) slidably mounted on the fixed seat (27), a smoke pushing block (29) mounted on one end of the slide rod (28), and a crank connecting rod (30) connecting the other end of the slide rod (28) and the drive end of the rejection motor (26). The bottom of the smoke filling chamber (24) is horizontally provided with a smoke pushing port and a smoke outlet on the inner and outer sides. The smoke outlet is horizontally aligned with the inner opening of the detection box (13). The smoke pushing block (29) is horizontally aligned with the smoke pushing port. The rejection motor (26) drives the slide rod (28) to move towards the inner side of the detection box (13) on the fixed seat (27) by means of the crank connecting rod (30). The movement of the slide rod (28) drives the smoke pushing seat to move towards the smoke pushing port of the smoke filling chamber (24).

7. The online airtightness testing device for cigarette packs according to claim 6, characterized in that: A smoke-blocking mechanism is provided on one side of the rejection bracket (25). The smoke-blocking mechanism includes a smoke-blocking bracket (31) with one end fixed to the rejection bracket (25) and a smoke-blocking plate (32) provided on the smoke-blocking bracket (31). The outer end of the smoke-blocking bracket (31) extends toward the detection box (13). The smoke-blocking plate (32) is fixed on the extended end of the smoke-blocking bracket (31) and corresponds to the inner opening of the detection box (13).

8. The online airtightness testing device for cigarette packs according to claim 6, characterized in that: The smoke filling chamber (24) is a long, vertically arranged rectangular cavity structure.

9. The online airtightness testing device for cigarette packs according to claim 6, characterized in that: The rejection mechanism also includes a smoke guiding mechanism located outside the detection box (13) and corresponding to the smoke pusher (29). The smoke guiding mechanism includes a support plate (33) fixed on the frame (1), a smoke exhaust port (34) set on the support plate (33), an upper support spring (35) and a lower support spring (36) respectively set at the upper and lower ends of the smoke exhaust port (34), an upper smoke exhaust roller (37) respectively rotatably set on the upper support spring (35) and located inside the upper side of the smoke exhaust port (34), and a lower smoke exhaust roller (38) rotatably set on the lower support spring (36) and located inside the lower side of the smoke exhaust port (34). The size of the smoke exhaust port (34) is larger than the outer opening of the detection box (13), and the distance between the upper smoke exhaust roller (37) and the lower smoke exhaust roller (38) is smaller than the height of the outer opening of the detection box (13).

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