Filter stick on-line quality monitoring system and method

Abstract

The invention relates to the technical field of filter stick detection, and provides an online quality monitoring system for a filter stick. Comprising a conveying mechanism and a plurality of supporting mechanisms, wherein the conveying mechanism is arranged among a filter stick cutting machine, a filter stick groove pressing machine and a blasting bead implanting machine and is used for conveying filter sticks; the supporting mechanisms are arranged on the conveying mechanism in an array manner and are used for supporting the filter sticks; the first detection mechanisms are arranged on the outer side of the conveying mechanism and used for preliminarily detecting the filter sticks; the second detection mechanisms are arranged between the supporting mechanism and the conveying mechanism and used for finely detecting the filter sticks; the online quality monitoring and monitoring method for the filter stick comprises the following steps: a preliminary detection process, a fine detection process, a pressure tank detection process and a bead blasting detection process, the problems that in the existing filter stick detection process, errors and missing detection phenomena exist in the measurement result, the detection range is narrow, the detection efficiency is low, and real-time follow-up cannot be achieved are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of filter rod detection, and particularly to an on-line quality monitoring and detection system and method for filter rods. Background Art

[0002] Tobacco products can be roughly divided into several categories such as snuff, water pipe tobacco, and cigarettes. As the tobacco product with the largest number of users currently, cigarettes are usually made by rolling tobacco, filter rods, and paper. After a cigarette is lit, many harmful substances are produced due to reactions such as combustion, thermal bonding, and thermal synthesis. With the deepening of people's understanding of the harm of smoking, technologies for reducing tar and harm in traditional cigarettes are constantly being explored, such as adjusting the tobacco formula of cigarettes, changing the tobacco filling method, and adjusting the suction resistance of filter rods; in the current tobacco industry, the quality of filter rods is a key factor determining the taste of cigarettes and the health of consumers. Some cigarettes also have beads containing liquid flavors embedded in the filter rods. When in use, the beads are pinched to release the liquid inside, thereby changing the taste of the smoke or increasing the sense of coolness, etc., to improve the smoking experience.

[0003] The patent document with the patent number CN109187545A discloses a filter tip defect detection device and detection method for a cigarette machine roller, belonging to the technical field of tobacco detection. The detection device includes a cigarette machine roller I and a cigarette machine roller II that cooperate with each other to transport filter tips. The filter tips are adsorbed at equal intervals on the outer edges of the cigarette machine roller I and the cigarette machine roller II, and the filter tips can be transferred and adsorbed from the outer edge of the cigarette machine roller I to the outer edge of the cigarette machine roller II as the cigarette machine roller I and the cigarette machine roller II rotate. Its characteristics include: an optical digital holographic system, an encoder, and a pneumatic rejector. The encoder is installed at the center of the cigarette machine roller II, and the pneumatic rejector is arranged on one side of the cigarette machine roller II; the optical digital holographic system includes a semiconductor laser, a fiber optic coupler I, a "Y"-shaped branched optical fiber, an optical fiber, a beam splitter, a fiber optic coupler II, a CCD camera, and an industrial computer. The present invention can improve the accuracy and efficiency of detecting the filter tips of cigarettes and reduce the influence of mechanical vibration on the accuracy during the detection of the filter tips of cigarettes.

[0004] However, in the actual detection process, the inventor found that the existing detection is to detect whether there are obvious quality problems on the appearance of the filter rod through a visual method. During on-line detection, the movement and vibration of the filter rod will cause errors in the measurement results, there is a phenomenon of missed detection for minor defects, and the detection range is relatively narrow. Moreover, the internal structure and suction resistance of the filter rod are also important parameters that need to be detected. Usually, manual sampling inspection is required to finely detect the filter rod, with low detection efficiency and inability to follow up in real time, resulting in defective products flowing into downstream processes. Summary of the Invention

[0005] The object of the present invention is to address the deficiencies of the prior art. By setting up a conveying mechanism in cooperation with a support mechanism, a first detection mechanism, and a second detection mechanism to cover the key steps of filter rod from cutting, grooving to bead implantation, and conduct full-process quality monitoring to avoid missed detections. 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 achieve real-time detection and follow-up of the physical characteristics of the filter rod, such as draw resistance, length, and roundness, under different processes. The detection range is large and the measurement results are accurate. Thus, the problems in the prior art of filter rod detection, such as errors in measurement results, missed detections, narrow detection range, low detection efficiency, and inability to follow up in real time, are solved.

[0006] For the above technical problems, the following technical solutions are adopted: An on-line quality monitoring and detection system for filter rods, comprising: A conveying mechanism disposed between a filter rod cutting machine, a filter rod grooving machine and a bead implantation machine for conveying filter rods, a plurality of support mechanisms arranged in an array on the conveying mechanism for supporting the filter rods, a plurality of first detection mechanisms disposed outside the conveying mechanism for preliminarily detecting the filter rods, and a second detection mechanism disposed between the support mechanism and the conveying mechanism for finely detecting the filter rods; The second detection mechanism includes a draw resistance detection component disposed between the support mechanism and the conveying mechanism for detecting the draw resistance ability of the filter rod through negative pressure, an adjustment component disposed on the support mechanism for adjusting the draw resistance detection value of the draw resistance detection component, and a dimension detection component disposed inside the support mechanism. The dimension detection component cooperates with the negative pressure of the draw resistance detection component to force the filter rod to move and rotate for detection, so as to detect the length and roundness of the filter rod.

[0007] Preferably, the conveying mechanism includes a tripod with the positions of three corners corresponding to the filter rod cutting machine, the filter rod grooving machine and the bead implantation machine respectively, three driving members respectively disposed at the three corners of the tripod, a conveyor belt disposed outside the three driving members, three feeding bins respectively inclined at the outer sides of the three corners of the tripod, and a pushing component disposed between the feeding bin and the outside of the support mechanism.

[0008] Preferably, the tripod is arranged in the vertical direction, so that the plane where the tripod is located is perpendicular to the horizontal plane; the support mechanism includes a support tube horizontally disposed on the conveyor belt for supporting the filter rod, a guiding surface disposed at one end of the support tube, a sealing ring disposed between the guiding surface and the support tube, and a negative pressure channel disposed at the other end of the support tube.

[0009] Preferably, the draw resistance detection assembly includes a negative pressure tube disposed on the tripod and configured to cooperate with the negative pressure channel to form a negative pressure in the support tube, a mesh plate movably disposed in the support tube and configured to support one end of the filter rod, an elastic member disposed in the support tube and configured to force the mesh plate to move toward the guiding surface, a first detection channel formed through the support tube near one end of the negative pressure channel, a first air flow sensor disposed in the first detection channel, and a baffle disposed on the mesh plate and configured to block the first detection channel.

[0010] Preferably, the angles between the three sides of the tripod and the horizontal plane are different; the adjustment assembly includes a limiting groove disposed on the inner wall of the support tube and configured to limit the sliding range of the mesh plate, a pushing ring movably disposed inside the support tube and configured to cooperate with the mesh plate to push the elastic member to deform, a control ring threadedly connected to the inner ring surface of the support tube and configured to control the movement of the pushing block toward the elastic member, and a counterweight disposed on the control ring. When the support tube moves to the three sides of the tripod, the counterweight forces the control ring to rotate under the action of gravity, thereby controlling the movement of the pushing block.

[0011] Preferably, the size detection assembly includes a mounting ring disposed between the mesh plate and the elastic member and configured to rotatably mount the mesh plate, a plurality of spiral plates spirally disposed inside the baffle and configured to force the mesh plate to rotate through air flow, a rotation sensor disposed in the mounting ring, a second detection channel formed through the support tube near one end of the sealing ring, and a second air flow sensor disposed in the second detection channel.

[0012] Preferably, the first detection mechanism includes a support frame disposed outside the feed bin, two cameras respectively disposed at both ends of the support frame on both sides outside the feed bin and configured to cooperate with each other to collect images of one side and both end faces of the filter rod, a flipping assembly disposed in the feed bin and configured to flip the filter rod, and a reflector disposed on the support frame and configured to reflect the images of both ends of the other side of the flipped filter rod to the two cameras respectively.

[0013] Preferably, the flipping assembly includes a carrying roller rotatably disposed in the feed bin, a flipping roller rotatably disposed on the side of the carrying roller away from the camera, a plurality of carrying grooves formed in an array on the carrying roller and the flipping roller, and an adsorption channel formed in the carrying groove and configured to adsorb the filter rod by negative pressure.

[0014] Preferably, the pushing component includes a positioning plate movably arranged on the feeding bin and used for positioning the filter rod, a pushing rod movably arranged outside the feeding bin and used for pushing the positioned filter rod into the supporting mechanism, a blowing pipe arranged on one side of the triangular frame and used for blowing the filter rod out of the supporting mechanism, and a guiding pipe movably arranged on the other side of the triangular frame and used for guiding the movement of the filter rod.

[0015] The present application also provides a method for on-line quality monitoring and detection of filter rods. Based on the above-mentioned on-line quality monitoring and detection system for filter rods, it includes the following steps: Step 1: Preliminary detection process. After the filter rod cut and formed by the filter rod cutting machine is preliminarily detected for its appearance by the first detection mechanism, the supporting mechanism supports the filter rod and conveys it along with the conveying mechanism. Step 2: Fine detection process. During the conveying process of the filter rod by the conveying mechanism, while the suction resistance detection component detects the suction resistance of the filter rod by forming a negative pressure in the supporting mechanism, it cooperates with the dimension detection component to detect the length and roundness of the filter rod. Step 3: Grooving detection process. The filter rod with grooves pressed by the filter rod grooving machine is re-detected preliminarily, and after the suction resistance detection value of the suction resistance detection component is adjusted by the adjusting component, the filter rod with the grooves is re-detected finely. Step 4: Bead detection process. The filter rod with beads implanted by the bead implanting machine is re-detected preliminarily, and after the suction resistance detection value of the suction resistance detection component is further adjusted by the adjusting component, while the filter rod with the beads is re-detected finely again, the stability of the bead installation is detected by negative pressure suction.

[0016] The beneficial effects of the present invention: (1) In the present invention, by setting the conveying mechanism in cooperation with the supporting mechanism, the first detection mechanism and the second detection mechanism to cover the key steps of the filter rod from cutting, grooving to bead implantation, while the whole process quality monitoring is carried out, for the filter rods that pass the appearance detection by the first detection mechanism, the physical properties of the filter rod such as suction resistance, length and roundness under different processes are detected and followed up in real time by the suction resistance detection component, the adjusting component and the dimension detection component, avoiding the phenomenon of missed detection, with a large detection range, and during the detection, by forming a negative pressure in the supporting mechanism to force the filter rod to move and rotate, the suction resistance of the filter rod and the stability of the bead installation are detected while the length and roundness of the filter rod are detected, with high detection efficiency, accurate measurement results, timely rejection of unqualified products in different processes, ensuring the consistency of products and avoiding material waste; (2) In the present invention, a negative pressure environment is formed in the support tube by setting a negative pressure tube to simulate the air flow resistance during actual smoking, and the detection result is closer to the actual working condition. When the air flow resistance forces the extrusion mesh plate to move until the first air flow sensor and the second air flow sensor simultaneously sense a drastic change in air flow, after detecting the length of the filter rod, a rotation sensor is used to detect whether the spiral plate forces the filter rod to rotate with the mesh plate under the action of the air flow. After the values of the first air flow sensor, the second sensor, and the rotation sensor are stable, they are compared with the set values to determine whether the draw resistance performance, diameter, and roundness of the filter rod are qualified. (3) In the present invention, the tripod is arranged in the vertical direction, and all three corners are respectively docked with the feeding bin and the pushing component to connect the steps of cutting, grooving, and bead implanting. It forms a compact triangular closed-loop path in cooperation with the driving part and the conveyor belt, and the process connection is seamless, greatly improving the production efficiency and reducing the floor area of the equipment. At the same time, by setting the differences in the angles between the three sides of the tripod and the horizontal plane, the counterweight block automatically switches among three inclined states under the action of gravity during the cyclic movement with the support tube, realizing different angles of rotation of the adjusting control ring thread, and further promoting the draw resistance detection value of the draw resistance detection component to respectively correspond to different detection requirements after the steps of cutting, grooving, and bead implanting. The whole process is purely mechanically adjusted, with a simple structure and low cost. In summary, the system has accurate measurement results, avoids missed detection, has a large detection range, high detection efficiency, and can be followed up in real time during the filter rod detection process, and is particularly suitable for the technical field of filter rod detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings without creative efforts based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of a filter rod online quality monitoring and detection system provided by the present invention.

[0019] Figure 2 Provided by the present invention Figure 1 The partial enlarged view of A in it.

[0020] Figure 3 Provided by the present invention Figure 1 The partial enlarged view of B in it.

[0021] Figure 4 Provided by the present invention Figure 1 The partial enlarged view of C in it.

[0022] Figure 5 Schematic diagram of the support mechanism provided by the present invention.

[0023] Figure 6 Exploded view of the support mechanism provided by the present invention and its internal structure.

[0024] Figure 7 Front view of an on-line quality monitoring and detection system for filter rods provided by the present invention.

[0025] Figure 8 Cross-sectional view of the support mechanism provided by the present invention.

[0026] Figure 9 Detection process of the second detection mechanism provided by the present invention Figure 1 .

[0027] Figure 10 Detection process of the second detection mechanism provided by the present invention Figure 2 .

[0028] Figure 11 Provided by the present invention Figure 8 Adjustment process diagram of the adjustment component in

[0029] Figure 12 Schematic diagram of the structure of the first detection mechanism provided by the present invention.

[0030] Figure 13 Front view of the first detection mechanism provided by the present invention.

[0031] Figure 14 Side view of the first detection mechanism provided by the present invention.

[0032] Figure 15 Three-dimensional cross-sectional view of the filter rod provided by the present invention.

[0033] Figure 16 Detection flow chart of an on-line quality monitoring and detection method for filter rods provided by the present invention. Specific embodiments

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings.

[0035] Embodiment 1 As Figure 1 , Figures 4 - 8 and Figure 15 shown, an on-line quality monitoring and detection system for filter rods includes: A conveying mechanism 1 disposed between a filter rod cutting machine, a filter rod grooving machine and a pearl implanting machine and used for conveying the filter rod 5, a plurality of supporting mechanisms 2 arranged in an array on the conveying mechanism 1 and used for supporting the filter rod 5, a plurality of first detecting mechanisms 3 disposed outside the conveying mechanism 1 and used for preliminarily detecting the filter rod 5, and a second detecting mechanism 4 disposed between the supporting mechanism 2 and the conveying mechanism 1 and used for precisely detecting the filter rod 5; The second detecting mechanism 4 includes a suction resistance detecting component 41 disposed between the supporting mechanism 2 and the conveying mechanism 1 and used for detecting the suction resistance ability of the filter rod 5 through negative pressure, an adjusting component 42 disposed on the supporting mechanism 2 and used for adjusting the suction resistance detection value of the suction resistance detecting component 41, and a dimension detecting component 43 disposed in the supporting mechanism 2. The dimension detecting component 43 cooperates with the negative pressure of the suction resistance detecting component 41 to force the filter rod 5 to move and rotate for detection, so as to detect the length and roundness of the filter rod 5.

[0036] In this embodiment, by setting the conveying mechanism 1 to cooperate with the supporting mechanism 2, the first detecting mechanism 3 and the second detecting mechanism 4 to cover the key steps of the filter rod 5 from cutting, grooving to pearl implanting, while conducting full-process quality monitoring, the physical properties of the suction resistance, length and roundness of the filter rod 5 under different processes are detected and tracked in real time through the qualified appearance detection of the first detecting mechanism 3 in cooperation with the suction resistance detecting component 41, the adjusting component 42 and the dimension detecting component 43, avoiding the phenomenon of missed detection, having a large detection range, and when detecting, forcing the filter rod 5 to move and rotate by forming negative pressure in the supporting mechanism 2, so as to detect the suction resistance ability of the filter rod 5 and the installation stability of the pearl 52 while detecting the length and roundness of the filter rod 5, with high detection efficiency, accurate measurement results, timely removing unqualified products in different processes, ensuring the consistency of products and avoiding material waste.

[0037] Specifically, first, after the filter rod cutter cuts and forms the filter rod 5, the first detection mechanism 3 conducts a preliminary appearance inspection on the filter rod 5, rejects the unqualified filter rods 5, and the support mechanism 2 supports the qualified filter rods 5 and conveys them along with the conveying mechanism 1; then, while the draw resistance detection component 41 detects the draw resistance of the filter rod 5 by forming a negative pressure within the support mechanism 2, it cooperates with the dimension 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 rejects the unqualified filter rods 5; then, the first detection mechanism 3 re-conducts a preliminary outer tube inspection on the filter rod 5 with grooves 51 pressed by the filter rod grooving machine, rejects the unqualified filter rods 5 with grooves 51, and after adjusting the draw resistance detection value of the draw resistance detection component 41 through the adjustment component 42, the draw resistance detection component 41 cooperates with the dimension detection component 43 to re-detect the draw resistance, length, and roundness of the filter rod 5 with grooves 51, and rejects the unqualified filter rods 5 with grooves 51; finally, the first detection mechanism 3 further re-conducts a preliminary appearance inspection on the filter rod 5 with beads 52 implanted by the bead implanting machine, rejects the unqualified filter rods 5 with beads 52, and after further adjusting the draw resistance detection value of the draw resistance detection component 41 through the adjustment component 42, the draw resistance detection component 41 cooperates with the dimension detection component 43 to further re-detect the draw resistance, length, and roundness of the filter rod 5 with grooves 51, and rejects the unqualified filter rods 5 with beads 52, realizing real-time quality monitoring and detection of the filter rod 5 during production on the production line.

[0038] It should be noted that the filter rod cutter, filter rod grooving machine, and bead implanting machine used during cigarette production, as well as their installation methods, are all prior arts and are not shown in the drawings, so no detailed description will be given here.

[0039] Furthermore, as Figures 1 - 3 shown, the conveying mechanism 1 includes a tripod 11 whose three angular positions respectively correspond to the filter rod cutter, filter rod grooving machine, and 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 inclinedly arranged outside the three corners of the tripod 11, and a pushing component 15 arranged outside the feeding bins 14 and the support mechanism 2.

[0040] In this embodiment, by setting the three corners of the tripod 11 in cooperation with the feeding bins 14 and the pushing component 15, the directional diversion and precise pushing of materials are respectively achieved during the steps of docking cutting, grooving, and bead implanting, and in cooperation with the driving members 12 and the conveyor belt 13, a compact triangular closed-loop path is formed, with seamless connection of processes. The three-way conveying layout of the tripod 11 eliminates the time waste of the idle return in traditional linear conveying, realizes continuous cyclic production, greatly improves production efficiency, and reduces the floor area of the equipment, adapting to the space limitations of the workshop.

[0041] It should be noted that the driving member 12 and the conveyor belt 13 themselves and their installation methods are all prior arts and will not be elaborated in detail here.

[0042] Furthermore, as Figure 1 and Figures 4 - 8 shown, the tripod 11 is arranged in the up and down direction, making the plane where the tripod 11 is located 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.

[0043] In this embodiment, by setting the support tube 21 in cooperation with the guide surface 22 and the negative pressure channel 24, it is convenient to support and suck the filter rod 5 by negative pressure. At the same time, by arranging the plane where the tripod 11 is located to be perpendicular to the horizontal plane, 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, it greatly reduces the floor area, especially suitable for a compact production line. And the filter rod 5 naturally adheres to the inner wall of the horizontal support tube 21 by its own weight and forms a seal in cooperation with the sealing ring 23, ensuring the sealing performance and friction consistency between the two during detection, and avoiding the influence of the self-weight of the filter rod 5 and negative pressure leakage on the detection structure of the second detection mechanism 4.

[0044] It should be noted that the guide surface 22 is an inclined surface structure or a curved surface structure.

[0045] Furthermore, as Figures 4 - 10 shown, the draw resistance detection assembly 41 includes a negative pressure tube 411 arranged on the tripod 11 and used to form negative pressure in the support tube 21 in cooperation with the negative pressure channel 24, a net 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 net plate 412 to move towards the guide surface 22, a first detection channel 414 formed through the support tube 21 near one end of the negative pressure channel 24, a first air flow sensor 415 arranged in the first detection channel 414, and a baffle 416 arranged on the net plate 412 and used to block the first detection channel 414.

[0046] In this embodiment, by setting the negative pressure tube 411 to form a negative pressure environment inside the support tube 21, simulating the air flow resistance during real smoking, the detection result is closer to the actual working condition. When the air flow resistance forces the baffle 416 to move with the mesh plate 412 to open the first detection channel 414, the first air flow sensor 415 can directly reflect the actual draw resistance performance of the filter rod 5. After the value of the first air flow sensor 415 stabilizes, it is compared with the set value to detect whether the draw resistance performance of the filter rod 5 is within the qualified range. Additionally, when detecting the filter rod 5 with the bursting bead 52, if the bursting bead 52 is not stably installed, under the action of negative pressure, the bursting bead 52 will move towards the mesh plate 412 to block the opening of the groove 51, thereby causing a large difference between the value of the first air flow sensor 415 and the set value, and obviously detecting unqualified products.

[0047] It should be noted that a rubber layer or a latex layer for forming a seal between the support tube 21 and / or the negative pressure tube 411 is provided. The number of negative pressure tubes 411 provided on each side of the tripod 11 is multiple. After performing the same detection process multiple times, the detection structures are compared with each other to avoid misdetection and false detection and improve the accuracy of detection. Additionally, the elastic member 413 can be a helical spring, a leaf spring, etc. Its itself and the installation method are both prior arts and will not be elaborated in detail here.

[0048] Furthermore, as Figures 4 - 11 shown, the angles between the three sides of the tripod 11 and the horizontal plane are different. The adjustment assembly 42 includes a limiting groove 421 provided 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 used to cooperate 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 block towards the elastic member 413, and a counterweight block 424 provided 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 block.

[0049] In this embodiment, by setting the differences in the angles between the three sides of the tripod 11 and the horizontal plane, the counterweight block 424 automatically switches among three inclined states under the action of gravity during the cyclic movement of the support tube 21. At different angles, the threaded rotation angle of the control ring 423 is different, and the displacement amount of the pushing ring 422 is different, precisely controlling the deformation amount of the elastic member 413, that is, precisely controlling the initial elastic force of the elastic member 413, and then corresponding to the different detection requirements after the steps of cutting, grooving, and bursting bead implantation respectively. The entire adjustment process does not rely on electricity, realizes pure mechanical adjustment, has a simple structure, low cost, and is convenient for maintenance. 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 bead implanting machine, and the angle of the third side of the tripod 11 between the filter rod grooving machine and the bead implanting machine, that is, the initial elastic force of the elastic member 413 decreases accordingly on the first side, the second side and the third side.

[0050] Furthermore, as Figures 4 - 10 shown, the dimension detection assembly 43 includes a mounting ring 431 disposed between the mesh plate 412 and the elastic member 413 and used for rotatably mounting the mesh plate 412, a plurality of helical plates 432 helically disposed inside the baffle 416 and used for forcing the mesh plate 412 to rotate through air flow, a rotation sensor 435 disposed inside the mounting ring 431, a second detection channel 433 formed through the support tube 21 near one end of the sealing ring 23, and a second air flow sensor 434 disposed inside the second detection channel 433.

[0051] In this embodiment, by providing the second detection channel 433 in cooperation with the second air flow sensor 434, when the filter rod 5 moves into the support tube 21 until the second air flow sensor 434 senses a drastic change in air flow, after detecting the length of the filter rod 5, the rotation sensor 435 is supplemented to detect the rotation of the filter rod 5 driven by the helical plate 432 under the action of air flow, thereby detecting the roundness of the filter rod 5.

[0052] Specifically, during detection, the negative pressure formed in the support tube 21 forces the filter rod 5 to move. The distance between the first detection channel 414 and the second detection channel 433 is equal to the length of the filter rod 5 until the filter rod 5 pushes against the sealing ring 23 and the second air flow sensor 434 senses a drastic change in air flow, and at the same time the first air flow sensor 415 senses a drastic change in air flow, then the detection is qualified. At this time, a large frictional force is formed by the extrusion between the filter rod 5 and the mesh plate 412. Furthermore, it can be detected by the rotation sensor 435 whether the air flow drives the filter rod 5 to rotate simultaneously with the mesh plate 412 through the helical plate 432. If the filter rod 5 does not rotate with the mesh plate 412, it means that the diameter of the filter rod 5 is too large or not round, resulting in a large frictional force with the inner wall of the support tube 21, and it is directly determined that the filter rod 5 is unqualified. If the filter rod 5 rotates with the mesh plate 412, the rotation sensor 435 is used to detect whether the rotation speed of the filter rod 5 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 it shakes or the internal structure is uneven, and then it is determined that the filter rod 5 is unqualified.

[0053] It should be noted that the number of the first detection channels 414 and the second detection channels 433 is multiple, and the number of the corresponding first air flow sensors 415 and the second air flow sensors 434 is multiple, so as to imitate the air permeability effect of the paper, improve the authenticity and accuracy of the inspection, and increase the air flow rate, which is convenient for the subsequent process of forcing the filter rod 5 to rotate for detection; in addition, the first air flow sensor 415, the second air flow sensor 434 and the rotation sensor 435 themselves and their installation methods are all prior arts, and will not be elaborated in detail here.

[0054] Further, as Figures 1 - 2 and Figures 12 - 14 shown, the first detection mechanism 3 includes a support frame 31 arranged outside the feeding bin 14, two cameras 32 respectively arranged at both ends of the support frame 31 on both sides outside the feeding bin 14 and cooperating with each other to collect images of one side and both end faces of the filter rod 5, a flipping assembly 33 arranged in the feeding bin 14 and used to flip the filter rod 5, and a reflecting mirror 34 arranged on the support frame 31 and used to reflect the images of the other two ends of the flipped filter rod 5 to the two cameras 32 respectively.

[0055] In this embodiment, by setting the flipping assembly 33 to flip the filter rod 5, cooperating with the camera 32 to collect the image of the filter rod 5 at the same time and indirectly collecting the image of the filter rod 5 through the reflecting mirror 34, and then performing image processing to judge whether there are surface contaminants and obvious defects in the length, diameter and roundness of the filter rod. The detection process is compatible with high speed and high precision, enabling full-surface and dead-angle-free detection, with good inspection effect, simple structure and low cost.

[0056] It should be noted that the camera 32 itself and its installation method are both prior arts, and will not be elaborated in detail here.

[0057] Further, as Figures 12 - 13 shown, the flipping assembly 33 includes a carrying roller 331 rotatably arranged in the feeding bin 14, a flipping roller 332 rotatably arranged on the side of the carrying roller 331 away from the camera 32, a plurality of carrying grooves 333 arrayed on the carrying roller 331 and the flipping roller 332, and an adsorption channel 334 formed in the carrying groove 333 and used for negative pressure adsorption of the filter rod 5.

[0058] In this embodiment, by setting the carrying roller 331 cooperating with the carrying groove 333 and the adsorption channel 334, the filter rods 5 in the feeding bin 14 can be carried individually. After the appearance of one side and both end faces of the filter rod 5 are detected, the flipping roller 332 cooperating with the carrying groove 333 and the adsorption channel 334 can flip the filter rod 5 on the carrying roller 331, so as to detect the appearance of the other side of the filter rod 5.

[0059] Further, as Figures 1 - 3As shown in the figure, the pushing component 15 includes a positioning plate 151 movably arranged on the feeding bin 14 and used for positioning the filter rod 5, a pushing rod 152 movably arranged outside the feeding bin 14 and used for pushing the positioned filter rod 5 into the supporting mechanism 2, a blowing pipe 153 arranged on one side of the tripod 11 and used for blowing the filter rod 5 out of the supporting mechanism 2, and a guiding pipe movably arranged on the other side of the tripod 11 and used for guiding the movement of the filter rod 5.

[0060] In this embodiment, after the positioning plate 151 positions the filter rod 5 with qualified appearance on the turning roller 332, the pushing rod 152 can accurately push the filter rod 5 into the supporting mechanism 2. After the second detection mechanism 4 finishes the detection, the moving guiding pipe is aligned with the supporting mechanism 2, and the blowing pipe 153 can blow the filter rod 5 in the supporting mechanism 2 into the guiding pipe and then position and convey it to the next production step; when the product is detected as unqualified, the blowing pipe 153 can blow the filter rod 5 on the turning roller 332 out through the supporting mechanism 2, and after cooperating with the guiding pipe to move away from the supporting mechanism 2, blow out the filter rod 5 in the supporting mechanism 2.

[0061] It should be noted that there are three collection boxes 154 corresponding to three air outlet pipes respectively directly below the tripod 11 to collect the just-formed filter rods 5 with unqualified detection, the filter rods 5 with grooves 51, and the filter rods 5 with beads 52 respectively; in addition, the negative pressure pipe 411, the adsorption channel 334, and the blowing pipe 153 form an air flow through the structure of a blower or a Roots blower, etc. The structure itself and its installation method are both prior arts and are not shown in the drawings and will not be elaborated in detail here; the moving guiding pipe is a prior art and is not shown in the drawings and will not be elaborated in detail here.

[0062] Embodiment Two As Figure 1 , Figures 4 - 8 and Figures 15 - 16 shown, the present application also provides a method for on-line quality monitoring and detection of filter rods. Based on the on-line quality monitoring and detection system of filter rods in Embodiment One, it includes the following steps: Step One: Preliminary detection process. After the filter rod 5 cut and formed by the filter rod cutting machine is preliminarily detected for appearance by the first detection mechanism 3, the supporting mechanism 2 supports the filter rod 5 and conveys it along with the conveying mechanism 1. Step Two: Fine detection process. During the conveying process of the filter rod 5 by the conveying mechanism 1, while the resistance detection component 41 detects the suction resistance of the filter rod 5 by forming a negative pressure in the supporting mechanism 2, it cooperates with the size detection component 43 to detect the length and roundness of the filter rod 5. Step Three: Grooving detection process. The filter rod 5 with grooves 51 pressed by the filter rod grooving machine is re-detected preliminarily, and after adjusting the suction resistance detection value of the suction resistance detection component 41 through the adjusting component 42, the filter rod 5 with grooves 51 is re-detected finely. Step 4: Filter tip with pop bead detection process. Re-implant the pop bead 52 into the filter tip 5 of the pop bead implanting machine for preliminary detection. After further adjusting the suction resistance detection value of the suction resistance detection component 41 through the adjustment component 42, while re-conducting fine detection on the filter tip 5 with the pop bead 52, the stability of the installation of the pop bead 52 can be detected by negative pressure suction.

[0063] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "front and back", "left and right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the invention.

[0064] Certainly, 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 can be one, while in other embodiments, the number of this element can be multiple. The term "one" should not be construed as a limitation on the quantity.

[0065] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art in the technical disclosure of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An on-line quality monitoring and detection system for filter rods, characterized in that, Including: A conveying mechanism disposed between a filter rod cutting machine, a filter rod grooving machine and a filter bead implanting machine and used for conveying filter rods, a plurality of supporting 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 preliminarily detecting the filter rods, and a second detection mechanism arranged between the supporting mechanism and the conveying mechanism and used for precisely detecting the filter rods; The second detection mechanism includes a suction resistance detection component arranged between the supporting mechanism and the conveying mechanism and used for detecting the suction resistance of the filter rod through negative pressure, an adjusting component arranged on the supporting mechanism and used for adjusting the suction resistance detection value of the suction resistance detection component, and a dimension detection component arranged inside the supporting mechanism. The dimension detection component cooperates with the negative pressure of the suction resistance detection component to force the filter rod to move and rotate for detection, so as to detect the length and roundness of the filter rod.

2. The on-line quality monitoring and detecting system for filter rods according to claim 1, characterized in that, The conveying mechanism includes a tripod with three corners respectively corresponding to the filter rod cutting machine, the filter rod grooving machine and the filter bead implanting machine, three driving parts respectively arranged at the three corners of the tripod, a conveyor belt arranged outside the three driving parts, three feeding bins respectively arranged obliquely outside the three corners of the tripod, and a pushing component arranged between the feeding bins and the outside of the supporting mechanism.

3. The on-line quality monitoring and detecting system for filter rods according to claim 2, wherein The tripod is arranged in the vertical direction, so that the plane where the tripod is located is perpendicular to the horizontal plane; The supporting mechanism includes a supporting tube horizontally arranged on the conveyor belt and used for supporting the filter rod, a guiding surface arranged at one end of the supporting tube, a sealing ring arranged between the guiding surface and the supporting tube, and a negative pressure channel arranged at the other end of the supporting tube.

4. The on-line quality monitoring and detecting system for filter rods according to claim 3, characterized in that The suction resistance detection component includes a negative pressure tube arranged on the tripod and used for forming negative pressure in the supporting tube in cooperation with the negative pressure channel, a net plate movably arranged in the supporting tube and used for supporting one end of the filter rod, an elastic member arranged in the supporting tube and used for forcing the net plate to move towards the guiding surface, a first detection channel formed through the supporting tube near one end of the negative pressure channel, a first air flow sensor arranged in the first detection channel, and a baffle arranged on the net plate and used for blocking the first detection channel.

5. An on-line quality monitoring and detecting system for filter rods according to claim 4, characterized in that, The angles between the three sides of the tripod and the horizontal plane are different; The adjusting component includes a limiting groove arranged on the inner wall of the supporting tube and used for limiting the sliding range of the net plate, a pushing ring movably arranged inside the supporting tube and used for pushing the elastic member to deform in cooperation with the net plate, a control ring threadedly connected to the inner ring surface of the supporting tube and used for controlling the pushing block to move towards the elastic member, and a counterweight block arranged on the control ring. When the supporting tube moves to the three sides of the tripod, the counterweight block forces the control ring to rotate under the action of gravity, and then controls the movement of the pushing block.

6. The on-line quality monitoring and detecting system for filter rods according to claim 4, characterized in that, The dimension detection component includes a mounting ring disposed between the screen plate and the elastic member and used for rotatably mounting the screen plate, a plurality of spiral plates spirally arranged inside the baffle and used for forcing the screen plate to rotate through air flow, a rotation sensor disposed inside the mounting ring, a second detection channel formed through the support tube near one end of the sealing ring, and a second air flow sensor disposed inside the second detection channel.

7. The on-line quality monitoring and detecting system for filter rods according to claim 2, characterized in that The first detection mechanism includes a support frame disposed outside the feed bin, two cameras respectively disposed at two ends of the support frame on both sides outside the feed bin and cooperating with each other for collecting images of one side and two end faces of the filter rod, a turning assembly disposed inside the feed bin and used for turning the filter rod, and a reflecting mirror disposed on the support frame and used for respectively reflecting images of the other two ends of the turned filter rod to the two cameras.

8. The on-line quality monitoring and detecting system for filter rods according to claim 7, characterized in that, The turning assembly includes a carrying roller rotatably disposed inside the feed bin, a turning roller rotatably disposed on a side of the carrying roller away from the camera, a plurality of carrying grooves formed in an array on the carrying roller and the turning roller, and an adsorption channel formed in the carrying groove and used for negatively adsorbing the filter rod.

9. The on-line quality monitoring and detecting system for filter rods according to claim 2, characterized in that, The pushing component includes a positioning plate movably disposed on the feed bin and used for positioning the filter rod, a pushing rod movably disposed outside the feed bin and used for pushing the positioned filter rod into the support mechanism, a blowing pipe disposed on one side of the tripod and used for blowing the filter rod out of the support mechanism, and a guiding pipe movably disposed on the other side of the tripod and used for guiding the movement of the filter rod.

10. An on-line quality monitoring and detecting method for filter rods, characterized in that, A filter rod on-line quality monitoring and detection system according to any one of claims 1-9, comprising the following steps: Step 1: Preliminary detection process. After the filter rod cut and formed by the filter rod cutting machine is preliminarily detected for its appearance by the first detection mechanism, the support mechanism supports the filter rod and conveys it along with the conveying mechanism. Step 2: Fine detection process. During the process of the filter rod being conveyed by the conveying mechanism, the draw resistance detection component detects the draw resistance of the filter rod by forming a negative pressure inside the support mechanism, and at the same time, cooperates with the dimension detection component to detect the length and roundness of the filter rod. Step 3: Grooving detection process. The filter rod with grooves pressed by the filter rod grooving machine is re-detected preliminarily, and after the draw resistance detection value of the draw resistance detection component is adjusted by the adjustment component, the filter rod with the grooves is re-detected finely. Step 4: Pearl detection process. The filter rod with pearls implanted by the pearl implanting machine is re-detected preliminarily, and after the draw resistance detection value of the draw resistance detection component is further adjusted by the adjustment component, while the filter rod with the pearls is re-detected finely, negative pressure suction is used to detect the stability of the pearl installation.

Images