A filter rod online quality monitoring system and method

Abstract

The present invention relates to the technical field of filter rod detection, and provides a filter rod online quality monitoring system, comprising: a conveying mechanism arranged between a filter rod cutting machine, a filter rod groove pressing machine and a bead popping implanting machine and used for conveying filter rods, a plurality of support mechanisms arranged in an array on the conveying mechanism and used for supporting the filter rods, a plurality of first detection mechanisms arranged outside the conveying mechanism and used for preliminary detection of the filter rods, and a second detection mechanism arranged between the support mechanism and the conveying mechanism and used for fine detection of the filter rods; a filter rod online quality monitoring method, comprising the following steps: a preliminary detection process, a fine detection process, a groove pressing detection process and a bead popping detection process; the present invention solves the problems of measurement results errors, missed detection, narrow detection range, low detection efficiency and inability to follow up in real time in the existing filter rod detection process.

Description

Technical Field

[0001] The present invention relates to the technical field of filter rod detection, and in particular to a filter rod online quality monitoring system and method. Background Art

[0002] Tobacco products can be roughly divided into several categories, such as snuff, hookah and cigarettes. Cigarettes, as the tobacco product with the largest number of users at present, are usually made of tobacco, filter rods and paper. After the cigarette is ignited, many harmful substances are produced due to reactions such as combustion, thermal bonding and thermal synthesis. As people's understanding of the harm of smoking deepens, the tar reduction and harm reduction technologies of traditional cigarettes are also being explored, such as adjusting the tobacco formula of cigarettes, changing the tobacco filling method and adjusting the suction resistance of the filter rod. In the current tobacco industry, the quality of the filter rod is a key factor in determining the taste of cigarettes and the health of consumers. Some cigarettes also have bursting beads containing liquid flavorings embedded in the filter rod. When used, they are squeezed to release the liquid inside, thereby changing the taste of the smoke or increasing the coolness, etc., to improve the cigarette experience.

[0003] Patent document CN109187545A discloses a filter rod defect detection device and method for a cigarette making machine roller, belonging to the field of tobacco inspection technology. The detection device comprises cigarette making machine rollers I and II, which cooperate to transfer filter rods. Filter rods are equidistantly attached to the outer edges of rollers I and II, and can be transferred and attached from the outer edge of roller I to the outer edge of roller II as rollers I and II rotate. The device is characterized by comprising an optical digital holographic system, an encoder mounted at the center of roller II, and a pneumatic rejector mounted on one side of roller II. The optical digital holographic system includes a semiconductor laser, a fiber coupler I, a Y-shaped branching optical fiber, an optical fiber, a beam splitter, a fiber coupler II, a CCD camera, and an industrial computer. The present invention can improve the detection accuracy and efficiency of cigarette filter rods and reduce the influence of mechanical vibration on the detection accuracy of cigarette filter rods.

[0004] However, during the actual inspection process, the inventors found that the existing inspection method is to visually detect whether there are obvious quality problems on the appearance of the filter rod. During online inspection, the movement and vibration of the filter rod will cause errors in the measurement results, and there will be omissions in minor defects. In addition, the inspection range is narrow, and the internal structure and suction resistance of the filter rod are also important parameters that need to be inspected. Usually, manual sampling is required to conduct detailed inspections of the filter rod. The inspection efficiency is low and it is impossible to follow up in real time, resulting in defective products flowing into downstream processes. Summary of the Invention

[0005] The purpose of the present invention is to address the shortcomings of the existing technology. By setting a transmission mechanism in conjunction with a support mechanism, a first detection mechanism and a second detection mechanism, the transmission mechanism covers the key steps of the filter rod from cutting, grooving to bead implantation, and the whole process quality monitoring is avoided to avoid missed detection. At the same time, after the first detection mechanism detects the appearance characteristics of the filter rod, it cooperates with the second detection mechanism to realize real-time detection and follow-up of the physical characteristics of the filter rod's suction resistance, length and roundness under different processes. The detection range is large and the measurement results are accurate. This solves the problems of measurement errors, missed detection, narrow detection range, low detection efficiency and inability to follow up in real time in the existing filter rod detection process.

[0006] In response to the above technical problems, the following technical solutions are adopted: a filter rod online quality monitoring system, including:

[0007] A conveying mechanism disposed between the filter rod cutting machine, the filter rod grooving machine and the popping bead implanting machine and used for conveying the filter rods, a plurality of supporting mechanisms disposed in an array on the conveying mechanism and used for supporting the filter rods, a plurality of first detection mechanisms disposed outside the conveying mechanism and used for preliminary detection of the filter rods, and a second detection mechanism disposed between the supporting mechanism and the conveying mechanism and used for fine detection of the filter rods;

[0008] The second detection mechanism includes a suction resistance detection component arranged between the support mechanism and the conveying mechanism and detecting the suction resistance capacity of the filter rod by negative pressure, an adjustment component arranged on the support mechanism and used to adjust the suction resistance detection value of the suction resistance detection component, and a size detection component arranged in the support mechanism. The size detection component cooperates with the negative pressure of the suction resistance detection component to force the filter rod to move and rotate for detection, thereby detecting the length and roundness of the filter rod.

[0009] Preferably, the conveying mechanism includes a tripod whose three corners correspond to the filter rod cutting machine, the filter rod grooving machine and the bead implanting machine, three driving members respectively arranged at the three corners of the tripod, a conveyor belt arranged outside the three driving members, three feeding bins respectively inclined at the outside of the three corners of the tripod, and a pushing assembly arranged on the outside of the feeding bin and the support mechanism.

[0010] Preferably, the tripod is arranged in the up and down directions so that the plane where the tripod is located is perpendicular to the horizontal plane; the support mechanism includes a support tube horizontally arranged on the conveyor belt and used to support the filter rod, a guide surface arranged at one end of the support tube, a sealing ring arranged between the guide surface and the support tube, and a negative pressure channel arranged at the other end of the support tube.

[0011] Preferably, the suction resistance detection component includes a negative pressure tube arranged on the tripod and cooperating with the negative pressure channel to form negative pressure in the support tube, a mesh plate movably arranged in the support tube and used to support one end of the filter rod, an elastic member arranged in the support tube and used to force the mesh plate to move toward the guide surface, a first detection channel formed on the support tube near one end of the negative pressure channel, a first airflow sensor arranged in the first detection channel, and a baffle arranged on the mesh plate and used to block the first detection channel.

[0012] Preferably, the angles between the three sides of the tripod and the horizontal plane are different; the adjustment component includes a limit groove arranged on the inner wall of the support tube and used to limit the sliding range of the mesh plate, a pushing ring movably arranged inside the support tube and cooperating with the mesh plate to push the elastic part to deform, a control ring threadedly connected to the inner ring surface of the support tube and used to control the movement of the pushing ring toward the elastic part, and a counterweight block arranged on the control ring. When the support tube moves to the three sides of the tripod, the counterweight block forces the control ring to rotate under the action of gravity, thereby controlling the movement of the pushing ring.

[0013] Preferably, the size detection assembly includes a mounting ring arranged between the mesh plate and the elastic member and used for rotatably mounting the mesh plate, a plurality of spiral plates spirally arranged on the inner side of the baffle and used for forcing the mesh plate to rotate through airflow, a rotation sensor arranged in the mounting ring, a second detection channel formed through the support tube near one end of the sealing ring, and a second airflow sensor arranged in the second detection channel.

[0014] Preferably, the first detection mechanism includes a support frame arranged on the outside of the feed bin, two cameras respectively arranged at both ends of the support frame outside both sides of the feed bin and cooperating with each other to collect images of one side and both end faces of the filter rod, a flipping assembly arranged in the feed bin and used to flip the filter rod, and a reflector arranged on the support frame and used to reflect the images of the two ends of the other side of the filter rod after flipping to the two cameras respectively.

[0015] Preferably, the flipping assembly includes a supporting roller rotatably arranged in the feed bin, a flipping roller rotatably arranged on the side of the supporting roller away from the camera, a plurality of supporting grooves formed in an array on the supporting roller and the flipping roller, and an adsorption channel formed in the supporting groove and used for negative pressure adsorption of the filter rod.

[0016] Preferably, the pushing assembly includes a positioning plate movably arranged on the feed bin and used to position the filter rod, a pushing rod movably arranged outside the feed bin and used to push the positioned filter rod into the support mechanism, an air blowing pipe arranged on one side of the tripod and used to blow the filter rod out of the support mechanism, and a guide pipe movably arranged on the other side of the tripod and used to guide the movement of the filter rod.

[0017] The present application also provides a filter rod online quality monitoring method, based on the above-mentioned filter rod online quality monitoring system, comprising the following steps:

[0018] Step 1: A preliminary inspection process, wherein the filter rod cut by the filter rod cutting machine passes the preliminary appearance inspection by the first inspection mechanism, and then the filter rod is supported by the support mechanism and transported along with the transport mechanism;

[0019] Step 2: During a fine inspection process, when the filter rod is being transported by the transport mechanism, the suction resistance detection component generates a negative pressure in the support mechanism to detect the suction resistance of the filter rod, and at the same time cooperates with the size detection component to detect the length and roundness of the filter rod;

[0020] Step 3: a groove pressing detection process, wherein the filter rod with the groove pressed out by the filter rod groove pressing machine is subjected to a preliminary re-test, and after the suction resistance detection value of the suction resistance detection component is adjusted by the adjustment component, the filter rod with the groove is subjected to a detailed re-test;

[0021] Step 4: The bursting bead detection process is to re-test the filter rod with the bursting bead implanted by the bursting bead implanter, and further adjust the suction resistance detection value of the suction resistance detection component through the adjustment component. At the same time, the filter rod with the bursting bead is re-tested in detail, and negative pressure suction is used to detect the stability of the bursting bead installation.

[0022] Beneficial effects of the present invention:

[0023] (1) The present invention provides a transmission mechanism in conjunction with a support mechanism, a first detection mechanism, and a second detection mechanism to cover the key steps of the filter rod from cutting, grooving to implanting the popping beads. While monitoring the quality of the entire process, the filter rod that has passed the appearance inspection by the first detection mechanism is combined with a suction resistance detection component, an adjustment component, and a size detection component to achieve real-time detection and follow-up of the physical properties of the filter rod's suction resistance, length, and roundness in different processes, thereby avoiding missed detection. The detection range is large, and during the detection, negative pressure is formed in the support mechanism to force the filter rod to move and rotate, thereby detecting the filter rod's suction resistance capacity and the stability of the popping beads installation, and at the same time detecting the filter rod's length and roundness. The detection efficiency is high, the measurement results are accurate, and unqualified products in different processes can be promptly eliminated, thereby ensuring product consistency and avoiding material waste.

[0024] (2) In the present invention, a negative pressure environment is formed in the support tube by arranging a negative pressure tube to simulate the airflow resistance during actual smoking. The detection result is closer to the actual working condition. When the airflow resistance forces the squeeze screen to move, until the first airflow sensor and the second airflow sensor simultaneously sense a drastic change in the airflow, the length of the filter rod is detected. Then, the rotation sensor is used to detect whether the spiral plate forces the filter rod to rotate with the screen under the action of the airflow. After the values ​​of the first airflow sensor, the second sensor and the rotation sensor are stable, they are compared with the set values ​​to determine whether the suction resistance performance, diameter and roundness of the filter rod are qualified.

[0025] (3) In the present invention, a tripod is set up in the up-down direction and the three corners are matched with the feeding bin and the pushing assembly to respectively connect the steps of cutting, grooving and bead implantation, and cooperate with the driving parts and the conveyor belt to form a compact triangular closed-loop path, so that the process connection is seamless, which greatly improves the production efficiency and reduces the equipment footprint. At the same time, by setting the difference in the angle between the three sides of the tripod and the horizontal plane, the counterweight block automatically switches between three tilt states under the action of gravity during the circular movement with the support tube, so as to realize the different angles of the adjustment control ring thread rotation, and then promote the control of the suction resistance detection value of the suction resistance detection assembly to correspond to the different detection requirements after the cutting, grooving and bead implantation steps. The whole process is purely mechanical adjustment with a simple structure and low cost.

[0026] In summary, the system has the advantages of accurate measurement results, avoiding missed detection, large detection range, high detection efficiency, and real-time follow-up in the filter rod detection process, and is particularly suitable for the field of filter rod detection technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a structural schematic diagram of a filter rod online quality monitoring system provided by the present invention.

[0029] Figure 2 The present invention provides Figure 1 A partial enlarged view of point A in the middle.

[0030] Figure 3 The present invention provides Figure 1 A partial enlarged view of point B in the middle.

[0031] Figure 4 The present invention provides Figure 1 A partial enlarged view of point C in the middle.

[0032] Figure 5 This is a structural schematic diagram of the support mechanism provided by the present invention.

[0033] Figure 6 This is an exploded schematic diagram of the support mechanism and its internal structure provided by the present invention.

[0034] Figure 7 This is a front view of a filter rod online quality monitoring system provided by the present invention.

[0035] Figure 8 A cross-sectional view of the support mechanism provided by the present invention.

[0036] Figure 9-10 The adjustment component provided by the present invention Figure 8 Diagram of the inspection process of the second inspection agency.

[0037] Figure 11 The present invention provides Figure 8 Diagram of the adjustment process of the adjustment component.

[0038] Figure 12 This is a structural schematic diagram of the first detection mechanism provided by the present invention.

[0039] Figure 13 This is a front view of the first detection mechanism provided by the present invention.

[0040] Figure 14 This is a side view of the first detection mechanism provided by the present invention.

[0041] Figure 15 A three-dimensional cross-sectional view of the filter rod provided by the present invention.

[0042] Figure 16 This is a detection flow chart of a filter rod online quality monitoring method provided by the present invention. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings.

[0044] Example 1

[0045] like Figure 1 、 Figure 4-Figure 8 as well as Figure 15 As shown, a filter rod online quality monitoring system includes:

[0046] A conveying mechanism 1 disposed between the filter rod cutting machine, the filter rod grooving machine, and the popping bead implanting machine and used for conveying the filter rods 5; a plurality of supporting mechanisms 2 disposed in an array on the conveying mechanism 1 and used for supporting the filter rods 5; a plurality of first detecting mechanisms 3 disposed outside the conveying mechanism 1 and used for preliminary detection of the filter rods 5; and a second detecting mechanism 4 disposed between the supporting mechanism 2 and the conveying mechanism 1 and used for fine detection of the filter rods 5;

[0047] The second detection mechanism 4 includes a suction resistance detection component 41 which is arranged between the support mechanism 2 and the conveying mechanism 1 and detects the suction resistance capacity of the filter rod 5 by negative pressure, an adjustment component 42 which is arranged on the support mechanism 2 and is used to adjust the suction resistance detection value of the suction resistance detection component 41, and a size detection component 43 which is arranged in the support mechanism 2. The size detection component 43 cooperates with the negative pressure of the suction resistance detection component 41 to force the filter rod 5 to move and rotate for detection, thereby detecting the length and roundness of the filter rod 5.

[0048] In this embodiment, a conveying mechanism 1 is provided to cooperate with a supporting mechanism 2, a first detecting mechanism 3 and a second detecting mechanism 4 to cover the key steps of the filter rod 5 from cutting, grooving to implanting the bursting beads. While monitoring the quality of the entire process, the first detecting mechanism 3 detects and detects the physical properties of the suction resistance, length and roundness of the filter rod 5 in different processes in real time through the suction resistance detection component 41, the adjustment component 42 and the size detection component 43. This avoids missed detection and has a large detection range. During detection, a negative pressure is formed in the supporting mechanism 2 to force the filter rod 5 to move and rotate. The suction resistance capacity of the filter rod 5 and the installation stability of the bursting beads 52 are detected, and at the same time, the length and roundness of the filter rod 5 are detected. The detection efficiency is high, the measurement results are accurate, and unqualified products in different processes can be promptly eliminated to ensure product consistency and avoid material waste.

[0049] In detail, first, the filter rod 5 cut and formed by the filter rod cutting machine passes through the preliminary appearance inspection of the first detection mechanism 3, and the unqualified filter rod 5 is removed, and the qualified filter rod 5 is supported by the support mechanism 2 for transmission along with the conveying mechanism 1; then the suction resistance detection component 41 detects the suction resistance capacity of the filter rod 5 by forming a negative pressure in the support mechanism 2, and cooperates with the size detection component 43 to force the filter rod 5 to move and rotate, thereby detecting the length and roundness of the filter rod 5, and removing the unqualified filter rod 5; then the first detection mechanism 3 re-performs a preliminary outer tube inspection on the filter rod 5 with the groove 51 pressed out by the filter rod groove pressing machine, and removes the unqualified filter rod 5 with the groove 51, and adjusts the suction resistance detection value of the suction resistance detection component 41 through the adjustment component 42, and then passes through the suction The resistance detection component 41 cooperates with the size detection component 43 to re-test the suction resistance capacity, length and roundness of the filter rod 5 with the groove 51, and reject the unqualified filter rod 5 with the groove 51; finally, the first detection mechanism 3 further re-performs a preliminary appearance inspection on the filter rod 5 implanted with the bursting bead 52 by the bursting bead implanting machine, and rejects the unqualified filter rod 5 with the bursting bead 52, and after further adjusting the suction resistance detection value of the suction resistance detection component 41 through the adjustment component 42, the suction resistance detection component 41 is cooperated with the size detection component 43 to further re-test the suction resistance capacity, length and roundness of the filter rod 5 with the groove 51, and reject the unqualified filter rod 5 with the bursting bead 52, thereby realizing real-time quality monitoring of the filter rod 5 during production in the production line.

[0050] It should be noted that the filter rod cutting machine, filter rod grooving machine and popping bead implanting machine used in cigarette production and their installation methods are all existing technologies, which are not shown in the accompanying drawings and will not be described in detail here.

[0051] Further, if Figure 1-Figure 3 As shown, the conveying mechanism 1 includes a tripod 11 whose three corners correspond to the filter rod cutting machine, the filter rod grooving machine and the bead implanting machine, three driving members 12 respectively arranged at the three corners of the tripod 11, a conveyor belt 13 arranged outside the three driving members 12, three feeding bins 14 respectively inclined at the outside of the three corners of the tripod 11, and a pushing assembly 15 arranged on the outside of the feeding bin 14 and the support mechanism 2.

[0052] In this embodiment, the three corners of the tripod 11 are arranged in conjunction with the feeding bin 14 and the pushing assembly 15 to respectively realize the directional guidance and precise pushing of the material in the steps of docking cutting, grooving to bead implantation, and cooperate with the driving member 12 and the conveyor belt 13 to form a compact triangular closed-loop path, and the process connection is seamless. The three-way transmission layout of the tripod 11 eliminates the time waste of the idle return in the traditional linear transmission, realizes continuous cycle production, greatly improves production efficiency, and reduces the equipment footprint to adapt to the space limitations of the workshop.

[0053] It should be noted that the driving member 12 and the conveyor belt 13 themselves and the installation method are all existing technologies and will not be described in detail here.

[0054] Further, if Figure 1 as well as Figure 4-Figure 8 As shown, the tripod 11 is arranged in the up and down direction so that the plane where the tripod 11 is located is perpendicular to the horizontal plane; the support mechanism 2 includes a support tube 21 horizontally arranged on the conveyor belt 13 and used to support the filter rod 5, a guide surface 22 arranged at one end of the support tube 21, a sealing ring 23 arranged between the guide surface 22 and the support tube 21, and a negative pressure channel 24 arranged at the other end of the support tube 21.

[0055] In this embodiment, a support tube 21 is provided to cooperate with a guide surface 22 and a negative pressure channel 24 to facilitate support and negative pressure attraction of the filter rod 5. At the same time, the plane where the tripod 11 is located is set to be perpendicular to the horizontal plane, so that the transmission path of the filter rod 5 between the production steps of cutting, grooving and bead implantation is a three-dimensional cycle. Compared with the horizontal layout, the floor space is greatly reduced, which is particularly suitable for compact production lines. The filter rod 5 relies on its own weight to naturally adhere to the inner wall of the horizontal support tube 21 and cooperates with the sealing ring 23 to form a seal, ensuring the sealing and friction consistency between the two during detection, and avoiding the influence of the filter rod 5's own weight and negative pressure leakage on the detection structure of the second detection mechanism 4.

[0056] It should be noted that the guide surface 22 is an inclined surface structure or a curved surface structure.

[0057] Further, if Figure 4-10 As shown, the suction resistance detection component 41 includes a negative pressure tube 411 arranged on the tripod 11 and cooperating with the negative pressure channel 24 to form a negative pressure in the support tube 21, a mesh plate 412 movably arranged in the support tube 21 and used to support one end of the filter rod 5, an elastic member 413 arranged in the support tube 21 and used to force the mesh plate 412 to move toward the guide surface 22, a first detection channel 414 formed on the support tube 21 near one end of the negative pressure channel 24, a first airflow sensor 415 arranged in the first detection channel 414 and a baffle 416 arranged on the mesh plate 412 and used to block the first detection channel 414.

[0058] In this embodiment, a negative pressure environment is formed in the support tube 21 by providing a negative pressure tube 411 to simulate the airflow resistance during actual smoking, and the detection result is closer to the actual working condition. When the airflow resistance forces the baffle 416 to move with the mesh plate 412 to open the first detection channel 414, the first airflow sensor 415 is able to directly reflect the actual suction resistance performance of the filter rod 5. After the value of the first airflow sensor 415 stabilizes, it is compared with the set value to detect whether the suction resistance performance of the filter rod 5 is within the qualified range; in addition, when detecting the filter rod 5 with the bursting bead 52, if the bursting bead 52 is not installed stably, the bursting bead 52 will move toward the mesh plate 412 under the action of negative pressure to block the opening of the groove 51, thereby making the difference between the value of the first airflow sensor 415 and the set value large, so that unqualified products can be clearly detected.

[0059] It should be noted that a rubber layer or latex layer is provided on the support tube 21 and / or the negative pressure tube 411 to form a seal between the two. There are multiple negative pressure tubes 411 on each side of the tripod 11. After performing the same detection process multiple times, the detection structures are compared with each other to avoid wrong detection and false detection, thereby improving the accuracy of the detection. In addition, the elastic part 413 can be a coil spring, a leaf spring, etc., which itself and the installation method are all existing technologies and will not be described in detail here.

[0060] Further, if Figure 4-11 As shown, the angles between the three sides of the tripod 11 and the horizontal plane are different; the adjustment component 42 includes a limit groove 421 arranged on the inner wall of the support tube 21 and used to limit the sliding range of the mesh plate 412, a pushing ring 422 movably arranged inside the support tube 21 and cooperating with the mesh plate 412 to push the elastic member 413 to deform, a control ring 423 threadedly connected to the inner ring surface of the support tube 21 and used to control the movement of the pushing ring 422 toward the elastic member 413, and a counterweight block 424 arranged on the control ring 423. When the support tube 21 moves to the three sides of the tripod 11, the counterweight block 424 forces the control ring 423 to rotate under the action of gravity, thereby controlling the movement of the pushing ring 422.

[0061] In this embodiment, by setting the difference in the angles between the three sides of the tripod 11 and the horizontal plane, the counterweight 424 is automatically switched to three tilt states under the action of gravity during the circular movement of the support tube 21. At different angles, the threaded rotation angles of the control ring 423 are different, and the displacement of the control push ring 422 is different. The deformation of the elastic member 413 is accurately controlled, and the initial elastic force of the elastic member 413 is accurately controlled, thereby corresponding to different detection requirements after the cutting, grooving and bead implantation steps. The entire adjustment process does not rely on electricity, and a purely mechanical adjustment is achieved, which has a simple structure, low cost, and is easy to maintain.

[0062] It should be noted that the angle of the first side of the tripod 11 between the filter rod cutting machine and the filter rod grooving machine is greater than the angle of the second side of the tripod 11 between the filter rod cutting machine and the bursting bead implanting machine, which is greater than the angle of the third side of the tripod 11 between the filter rod grooving machine and the bursting bead implanting machine, that is, the initial elastic force of the elastic member 413 is reduced at the first side, the second side and the third side.

[0063] Further, if Figure 4-10 As shown, the size detection component 43 includes a mounting ring 431 arranged between the mesh plate 412 and the elastic member 413 and used for rotating the mounting mesh plate 412, a plurality of spiral plates 432 spirally arranged on the inner side of the baffle 416 and used for forcing the mesh plate 412 to rotate through airflow, a rotation sensor 435 arranged in the mounting ring 431, a second detection channel 433 formed through one end of the support tube 21 near the sealing ring 23, and a second airflow sensor 434 arranged in the second detection channel 433.

[0064] In this embodiment, by setting a second detection channel 433 in conjunction with a second airflow sensor 434, when the filter rod 5 moves into the support tube 21 until the second airflow sensor 434 senses a drastic change in the airflow, the length of the filter rod 5 is detected, and then the rotation sensor 435 is used to detect that the spiral plate 432 forces the filter rod 5 to rotate with the mesh plate 412 under the action of the airflow, thereby detecting the roundness of the filter rod 5.

[0065] In detail, during the inspection, the negative pressure formed in the support tube 21 forces the filter rod 5 to move, and the distance between the first inspection channel 414 and the second inspection channel 433 is equal to the length of the filter rod 5, until the filter rod 5 thrusts the sealing ring 23 and the second airflow sensor 434 senses a drastic change in the airflow, and the first airflow sensor 415 simultaneously senses a drastic change in the airflow, the inspection is qualified. At this time, a large friction force is formed between the filter rod 5 and the mesh plate 412, and then the rotation sensor 435 is used to detect whether the airflow through the spiral plate 432 drives the filter rod 5 to rotate simultaneously with the mesh plate 412. If the filter rod 5 does not rotate with the mesh plate 412, the diameter of the filter rod 5 is large or not round, resulting in a large friction force with the inner wall of the support tube 21, and the filter rod 5 is directly judged to be unqualified. If the filter rod 5 rotates with the mesh plate 412, the rotation sensor 435 is used to detect whether the speed of the filter rod 5 rotating with the mesh plate 412 is stable. If the rotation is unstable, it indicates that the diameter of the filter rod 5 is small and shakes or the internal structure is uneven, and then the filter rod 5 is judged to be unqualified.

[0066] It should be noted that there are multiple first detection channels 414 and multiple second detection channels 433, and the corresponding number of first airflow sensors 415 and multiple second airflow sensors 434 is multiple, which can simulate the breathability of paper, improve the authenticity and accuracy of the inspection, and increase the airflow circulation rate, which facilitates the subsequent process of forcing the filter rod 5 to rotate for inspection; in addition, the first airflow sensor 415, the second airflow sensor 434 and the rotation sensor 435 themselves and the installation method are all existing technologies and will not be described in detail here.

[0067] Further, if Figure 1-Figure 2 as well as Figure 12-14 As shown, the first detection mechanism 3 includes a support frame 31 arranged on the outside of the feed bin 14, two cameras 32 respectively arranged at the two ends of the support frame 31 outside on both sides of the feed bin 14 and cooperating with each other to collect images of one side and two end faces of the filter rod 5, a flipping assembly 33 arranged in the feed bin 14 and used to flip the filter rod 5, and a reflector 34 arranged on the support frame 31 and used to reflect the images of the two ends of the other side of the filter rod 5 after flipping to the two cameras 32 respectively.

[0068] In this embodiment, the filter rod 5 is flipped by setting a flip component 33, and the image of the filter rod 5 is collected simultaneously with the camera 32 and indirectly collected through the reflector 34, and then image processing is performed to determine whether the filter rod has surface contamination and obvious defects in length, diameter and roundness. The detection process is compatible with high speed and high precision, and the entire surface can be detected without blind spots, with good inspection effect, simple structure and low cost.

[0069] It should be noted that the camera 32 itself and the installation method are both existing technologies and will not be described in detail here.

[0070] Further, if Figure 12-13 As shown, the flipping assembly 33 includes a supporting roller 331 rotatably arranged in the feed bin 14, a flipping roller 332 rotatably arranged on the side of the supporting roller 331 away from the camera 32, a plurality of supporting grooves 333 formed in an array on the supporting roller 331 and the flipping roller 332, and an adsorption channel 334 formed in the supporting groove 333 and used for negative pressure adsorption of the filter rod 5.

[0071] In this embodiment, by providing a carrying roller 331 in conjunction with the carrying groove 333 and the adsorption channel 334, the filter rod 5 in the feed bin 14 can be carried individually, and one side and both end faces of the filter rod 5 can be visually inspected. Then, the flipping roller 332 is used in conjunction with the carrying groove 333 and the adsorption channel 334 to turn over the filter rod 5 on the carrying roller 331, so that the other side of the filter rod 5 can be visually inspected.

[0072] Further, if Figure 1-Figure 3As shown, the pushing assembly 15 includes a positioning plate 151 movably set on the feed bin 14 and used to position the filter rod 5, a pushing rod 152 movably set outside the feed bin 14 and used to push the positioned filter rod 5 into the support mechanism 2, an air blowing pipe 153 set on one side of the tripod 11 and used to blow the filter rod 5 out of the support mechanism 2, and a guide pipe movably set on the other side of the tripod 11 and used to guide the movement of the filter rod 5.

[0073] In this embodiment, after the filter rod 5 that has passed the appearance inspection is positioned on the flip roller 332 by setting the positioning plate 151, the push rod 152 can accurately push the filter rod 5 into the support mechanism 2. When the second inspection mechanism 4 completes the inspection, the moving guide tube is aligned with the support mechanism 2, and the blowing tube 153 can blow the filter rod 5 in the support mechanism 2 into the guide tube and then position it for transportation to the next production step; when the product inspection fails, the blowing tube 153 can blow out the filter rod 5 on the flip roller 332 through the support mechanism 2, and after cooperating with the guide tube to move away from the support mechanism 2, blow out the filter rod 5 in the support mechanism 2.

[0074] It should be noted that three collection boxes 154 corresponding to the three air outlet pipes are provided directly below the tripod 11 to collect the newly formed filter rods 5, the filter rods 5 with grooves 51 and the filter rods 5 with burst beads 52 that fail the inspection respectively; in addition, the negative pressure tube 411, the adsorption channel 334 and the blowing tube 153 form an airflow through the structure of a blower or a Roots blower, etc. The structure itself and the installation method are both existing technologies, which are not drawn in the drawings and will not be described in detail here; the movable guide tube is existing technology, which is not drawn in the drawings and will not be described in detail here.

[0075] Example 2

[0076] like Figure 1 、 Figure 4-Figure 8 as well as Figure 15-16 As shown, the present application also provides a filter rod online quality monitoring method, based on the filter rod online quality monitoring system in Example 1, comprising the following steps:

[0077] Step 1: Preliminary inspection process: After the filter rod 5 cut by the filter rod cutting machine passes the preliminary appearance inspection of the first inspection mechanism 3, the support mechanism 2 supports the filter rod 5 and conveys it with the conveying mechanism 1;

[0078] Step 2: Fine inspection process: During the process of the filter rod 5 being conveyed by the conveying mechanism 1, the suction resistance detection component 41 detects the suction resistance of the filter rod 5 by forming a negative pressure in the supporting mechanism 2, and cooperates with the size detection component 43 to detect the length and roundness of the filter rod 5;

[0079] Step 3: The filter rod 5 with the groove 51 pressed out by the filter rod groove pressing machine is subjected to preliminary re-testing, and after the draw resistance detection value of the draw resistance detection component 41 is adjusted by the adjustment component 42, the filter rod 5 with the groove 51 is subjected to detailed re-testing;

[0080] Step 4: The bursting bead detection process, the bursting bead implanter is used to implant the filter rod 5 with the bursting bead 52 for a preliminary re-inspection, and the suction resistance detection value of the suction resistance detection component 41 is further adjusted by the adjustment component 42. The filter rod 5 with the bursting bead 52 is then re-inspected for a detailed inspection, and negative pressure suction is used to detect the stability of the installation of the bursting bead 52.

[0081] In the description of the present invention, it should be understood that the terms "front and back", "left and right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or components referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the invention.

[0082] Of course, in this technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0083] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art based on the technical guidance of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A filter rod online quality monitoring system, characterized in that: include: A conveying mechanism disposed between the filter rod cutting machine, the filter rod grooving machine and the popping bead implanting machine and used for conveying the filter rods, a plurality of supporting mechanisms disposed in an array on the conveying mechanism and used for supporting the filter rods, a plurality of first detection mechanisms disposed outside the conveying mechanism and used for preliminary detection of the filter rods, and a second detection mechanism disposed between the supporting mechanism and the conveying mechanism and used for fine detection of the filter rods; The second detection mechanism includes a suction resistance detection component disposed between the support mechanism and the conveying mechanism and configured to detect the suction resistance of the filter rod by means of negative pressure, an adjustment component disposed on the support mechanism and configured to adjust a suction resistance detection value of the suction resistance detection component, and a size detection component disposed within the support mechanism. The size detection component cooperates with the negative pressure of the suction resistance detection component to cause the filter rod to move and rotate, thereby detecting the length and roundness of the filter rod. The conveying mechanism includes a tripod with three corners corresponding to the filter rod cutting machine, the filter rod slotting machine and the bead implanting machine, three driving members respectively arranged at the three corners of the tripod, a conveyor belt arranged outside the three driving members, three feeding bins respectively arranged obliquely outside the three corners of the tripod, and a pushing assembly arranged outside the feeding bin and the support mechanism; The tripod is arranged in the up-down direction so that the plane on which the tripod is located is perpendicular to the horizontal plane; The support mechanism includes a support tube horizontally arranged on the conveyor belt and used to support the filter rod, a guide surface arranged at one end of the support tube, a sealing ring arranged between the guide surface and the support tube, and a negative pressure channel arranged at the other end of the support tube; The resistance to suction detection assembly includes a negative pressure tube disposed on the tripod and cooperating with the negative pressure channel to form a negative pressure in the support tube, a mesh plate movably disposed in the support tube and used to support one end of the filter rod, an elastic member disposed in the support tube and used to force the mesh plate to move toward the guide surface, a first detection channel formed through the support tube near one end of the negative pressure channel, a first airflow sensor disposed in the first detection channel, and a baffle disposed on the mesh plate and used to shield the first detection channel; The size detection assembly includes a mounting ring arranged between the mesh plate and the elastic member and used for rotatably mounting the mesh plate, a plurality of spiral plates spirally arranged on the inner side of the baffle and used for forcing the mesh plate to rotate through airflow, a rotation sensor arranged in the mounting ring, a second detection channel formed through the support tube near one end of the sealing ring, and a second airflow sensor arranged in the second detection channel.

2. A filter rod online quality monitoring system according to claim 1, characterized in that: The angles between the three sides of the tripod and the horizontal plane are different; The adjustment assembly includes a limit groove arranged on the inner wall of the support tube and used to limit the sliding range of the mesh plate, a push ring movably arranged inside the support tube and cooperating with the mesh plate to push the elastic part to deform, a control ring threadedly connected to the inner ring surface of the support tube and used to control the movement of the push ring toward the elastic part, and a counterweight block arranged on the control ring. When the support tube moves to the three sides of the tripod, the counterweight block forces the control ring to rotate under the action of gravity, thereby controlling the movement of the push ring.

3. The filter rod online quality monitoring system according to claim 1, characterized in that: The first detection mechanism includes a support frame arranged on the outside of the feed bin, two cameras respectively arranged at both ends of the support frame outside the two sides of the feed bin and cooperating with each other to collect images of one side and both end faces of the filter rod, a flipping assembly arranged in the feed bin and used to flip the filter rod, and a reflector arranged on the support frame and used to reflect the images of the two ends of the other side of the filter rod after flipping to the two cameras respectively.

4. A filter rod online quality monitoring system according to claim 3, characterized in that: The flipping assembly includes a supporting roller rotatably arranged in the feed bin, a flipping roller rotatably arranged on the side of the supporting roller away from the camera, a plurality of supporting grooves formed in an array on the supporting roller and the flipping roller, and an adsorption channel formed in the supporting groove and used for negative pressure adsorption of the filter rod.

5. The filter rod online quality monitoring system according to claim 1, characterized in that: The pushing assembly includes a positioning plate movably arranged on the feed bin and used to position the filter rod, a pushing rod movably arranged outside the feed bin and used to push the positioned filter rod into the supporting mechanism, an air blowing pipe arranged on one side of the tripod and used to blow the filter rod out of the supporting mechanism, and a guide pipe movably arranged on the other side of the tripod and used to guide the movement of the filter rod.

6. A filter rod online quality monitoring method, characterized in that: A filter rod online quality monitoring system according to any one of claims 1 to 5, comprising the following steps: Step 1: A preliminary inspection process, wherein the filter rod cut by the filter rod cutting machine passes the preliminary appearance inspection by the first inspection mechanism, and then the filter rod is supported by the support mechanism and transported along with the transport mechanism; Step 2: During a fine inspection process, when the filter rod is being transported by the transport mechanism, the suction resistance detection component generates a negative pressure in the support mechanism to detect the suction resistance of the filter rod, and at the same time cooperates with the size detection component to detect the length and roundness of the filter rod; Step 3: a groove pressing detection process, wherein the filter rod with the groove pressed out by the filter rod groove pressing machine is subjected to a preliminary re-test, and after the suction resistance detection value of the suction resistance detection component is adjusted by the adjustment component, the filter rod with the groove is subjected to a detailed re-test; Step 4: The bursting bead detection process is to re-test the filter rod with the bursting bead implanted by the bursting bead implanter, and further adjust the suction resistance detection value of the suction resistance detection component through the adjustment component. At the same time, the filter rod with the bursting bead is re-tested in detail, and negative pressure suction is used to detect the stability of the bursting bead installation.

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