Defective filter stick detecting and screening device

Abstract

The invention discloses a defective filter stick detecting and screening device, and belongs to the field of cigarette production equipment, the defective filter stick detecting and screening device comprises an outer cover, a filter stick moving structure and a detection light source, the outer cover is internally provided with a visual detection structure, and the visual detection structure is used for collecting filter stick image data; the filter stick moving structure comprises a first wheel disc and a second wheel disc, the first wheel disc is arranged above the second wheel disc, filter stick adsorption grooves are formed in the first wheel disc and the second wheel disc, and mounting shafts of the first wheel disc and the second wheel disc are connected to the power structure; air holes are formed in the bottom of the adsorption groove; the first wheel disc and the second wheel disc are provided with sealing needle structures, and the sealing needle structures can be pushed by the electric push rod to transversely move to seal the air holes. According to the device, through vertical adsorption conveying of the wheel discs, the filter sticks are not overlapped in the circumferential direction and are closely arranged side by side, and detection on the complete surfaces of the filter sticks is completed in cooperation with a detection light source and a visual detection structure.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of cigarette production equipment, and particularly relates to a defective filter rod detection and screening device. BACKGROUND

[0002] As a core functional component of cigarettes, the appearance quality of filter rods directly affects the smoking experience and market reputation of cigarettes. In the filter rod forming process, if surface wrinkles, glue spots, uneven diameters and other appearance defects are not removed in time, it will cause poor compatibility of cigarette connection, degradation of product appearance, and increase of raw material loss.

[0003] The current mainstream detection method in the industry is mainly manual visual inspection and offline sampling inspection: manual visual inspection is limited by the resolution accuracy and detection efficiency of the human eye, and it is difficult to match the speed of the high-speed production line; offline sampling inspection is a "post-detection", and the defective filter rod has flowed into the next process, and the sampling rate is low, which cannot realize real-time removal and is difficult to trace the specific process of defect generation.

[0004] A more difficult problem to solve is that the detection equipment configured on the existing production line still has significant detection defects due to the limitations of the filter rod conveying method: the filter rod is conveyed between stations in a flat manner by a conveying mechanism, and most detection equipment can only cover the visible area above the filter rod, forming a large area of detection blind area below the shielding area; at the same time, when the spacing between the flatly arranged filter rods is too close, the reflected light of adjacent individuals interferes with each other, causing diameter measurement deviation, color spot identification misjudgment and other problems, which seriously affect the detection accuracy. SUMMARY

[0005] The purpose of the present application is to provide a defective filter rod detection and screening device to solve the problems raised in the background.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a defective filter rod detection and screening device, comprising an outer cover, a filter rod moving structure and a detection light source, the filter rod moving structure is arranged inside the outer cover, and the detection light source is arranged in the outer cover; The inner part of the outer cover is provided with a visual detection structure, and the visual detection structure is used for collecting filter rod image data; The filter rod moving structure comprises a wheel disc one and a wheel disc two, the wheel disc one is arranged above the wheel disc two, the wheel disc one and the wheel disc two are both provided with filter rod adsorption grooves, and the mounting shafts of the wheel disc one and the wheel disc two are connected to a power structure; The bottom of the adsorption groove is provided with an air hole; The wheel disc one and the wheel disc two are provided with a sealing needle structure, and the sealing needle structure transversely penetrates all the air holes; The sealing needle structure can move transversely to close the air holes under the pushing of an electric push rod; The lower part of the wheel disc two is provided with a conveying belt structure.

[0007] Preferably, the top of the cover is provided with a guide hole, the lower outlet of the guide hole is above the highest point of the wheel disc one, and the width of the guide hole allows the filter rod to pass through.

[0008] Preferably, the adsorption grooves are arranged at intervals on the edges of the wheel disc one and the wheel disc two, the adsorption grooves are circular arcs, the inner diameter of the circular arc is the same as the diameter of the filter rod, and the depth of the adsorption groove is 1 / 4-1 / 3 of the diameter of the groove.

[0009] Preferably, the lower end of the air hole is connected to the central hole of the wheel disc one and the wheel disc two, and the central hole is internally provided with a sealing sleeve.

[0010] Preferably, the two ends of the sealing sleeve are sealingly connected to the central hole through sealing strips, the cylinder wall of the sealing sleeve is provided with a through hole, the end of the sealing sleeve is provided with a suction pipe, and the suction force of the wheel disc two is greater than that of the wheel disc one.

[0011] Preferably, the sealing needle structure comprises a pressure receiving head, a sealing needle and a limiting head, the pressure receiving head and the limiting head are respectively located at the two ends of the sealing needle, the sealing needle is provided with a through hole which is the same as the air hole, the inner side of the pressure receiving head is provided with an elastic member, the inner side surface of the limiting head is provided with a limiting needle, the limiting needle can be slidably inserted into the wheel disc one and the wheel disc two, and the through hole is aligned with the air hole when the elastic member pushes the pressure receiving head, allowing air flow to pass through.

[0012] Preferably, the detection light source comprises a linear array light source, a surface array light source and a backlight light source, and the detection light source is arranged in the cover.

[0013] Preferably, the visual detection structure comprises four groups of cameras arranged on the inner side of the cover.

[0014] Preferably, the power structure comprises a motor and a synchronous belt, the output shaft of the motor is connected to the synchronous pulley of the synchronous belt, and the mounting shafts of the wheel disc one and the wheel disc two are respectively connected to the two synchronous pulleys of the synchronous belt.

[0015] Preferably, the conveyor belt structure comprises a conveyor belt one and a conveyor belt two, the conveyor belt one is arranged below the lowest point of the wheel disc two, the conveyor belt two is arranged at a position 90° rotated in the rotation direction of the wheel disc two, and the position and number of the electric push rods correspond to the arrangement of the conveyor belt one and the conveyor belt two.

[0016] Compared with the prior art, the application has the following beneficial effects: Compared to the drawbacks of traditional flat conveying methods where overlapping filter rods cause obstruction below, this application uses a vertical adsorption conveyor system to ensure that the filter rods are circumferentially non-overlapping and closely arranged. Combined with a detection light source and a visual inspection structure, it completes the inspection of the entire surface of the filter rods. The multispectral light source is matched with the reflectivity of the filter rod material, greatly reducing the misjudgment rate caused by interference from reflected light from adjacent filter rods. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a positional diagram of the first and second wheel discs and the first and second conveyor belts of the present invention. Figure 3 Diagrams showing the filter rod moving structure, power structure, and electric actuator structure; Figure 4 for Figure 3 Cross-sectional view at inner AA; Figure 5 An exploded view of the wheel, the closed needle structure, and the sealing sleeve structure; Figure 6 This is a diagram of a closed needle structure; Figure 7 This is a schematic diagram of the structure of the present invention.

[0018] The attached diagram is labeled as follows: 1-Outer cover; 11-Guide hole; 2-Filter rod moving structure; 21-Disc 1; 22-Disc 2; 23-Adsorption groove; 231-Air hole; 24-Sealing needle structure; 241-Pressure bearing head; 242-Sealing needle; 243-Limiting head; 244-Elastic element; 245-Limiting needle; 25-Sealing sleeve; 251-Through hole; 252-Suction tube; 4-Vision inspection structure; 5-Power structure; 51-Motor; 52-Synchronous belt; 6-Conveyor belt structure; 61-Conveyor belt 1; 62-Conveyor belt 2; 7-Electric push rod. Detailed Implementation

[0019] The following detailed description of the embodiments, with reference to the accompanying drawings, will further illustrate the specific implementation of the present invention, in order to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of the present invention.

[0020] like Figures 1-7 As shown, the present invention provides a defective filter rod detection and screening device, including an outer cover 1, a filter rod moving structure 2, and a detection light source. The filter rod moving structure 2 is disposed inside the outer cover 1, and the detection light source is disposed inside the outer cover 1. The outer cover 1 is a sealed box with a guide hole 11 on the top.

[0021] The outer cover 1 is internally provided with a visual detection structure 4 for collecting filter rod image data. The filter rod moving structure 2 comprises a wheel disc one 21 and a wheel disc two 22, the wheel disc one 21 is arranged above the wheel disc two 22, and the wheel disc one 21 and the wheel disc two 22 are both provided with filter rod adsorption grooves 23, and the mounting shafts of the wheel disc one 21 and the wheel disc two 22 are connected to the power structure 5. The wheel disc one 21 and the wheel disc two 22 are circular metal discs, and the edges are provided with adsorption grooves 23 at equal intervals, and the number is 15-30 per wheel disc. The adsorption grooves 23 are circular arc-shaped and the surfaces are polished.

[0022] The bottom of the adsorption groove 23 is provided with an air hole 231. The wheel disc one 21 and the wheel disc two 22 are provided with a sealing needle structure 24, and the sealing needle structure 24 transversely penetrates all the air holes 231. The sealing needle structure 24 can move transversely to close the air holes 231 under the pushing of the electric push rod 7. The lower side of the wheel disc two 22 is provided with a conveyor belt structure 6.

[0023] In this embodiment, the top of the outer cover 1 is provided with a guide hole 11, and the lower outlet of the guide hole 11 is located above the highest point of the wheel disc one 21, and the width of the guide hole 11 allows the filter rod to pass through.

[0024] The guide hole 11 limits the deviation when the filter rod enters, and ensures that the filter rod enters vertically into the wheel disc adsorption area.

[0025] In this embodiment, the adsorption grooves 23 are arranged at equal intervals on the edges of the wheel disc one 21 and the wheel disc two 22, the adsorption grooves 23 are circular arc-shaped and the inner diameter of the circular arc is the same as the diameter of the filter rod, and the depth of the adsorption groove 23 is 1 / 4-1 / 3 of the groove diameter.

[0026] The adsorption groove 23 is fitted to the outer circumference of the filter rod through the circular arc surface, stably supports the filter rod, and the depth of 1 / 4-1 / 3 can ensure that the adsorbed filter rod can expose more outer surface, which is convenient for detection.

[0027] In this embodiment, the lower end of the air hole 231 is connected to the center hole of the wheel disc one 21 and the wheel disc two 22, and the center hole is internally provided with a sealing sleeve 25.

[0028] The suction pipe 252 is connected to the external suction equipment, and the air hole 231 is sucked to negative pressure through the through hole 251 of the sealing sleeve 25, so that the filter rod is adsorbed in the adsorption groove 23.

[0029] In this embodiment, the two ends of the sealing sleeve 25 are sealed to the central hole by sealing strips. The sleeve wall of the sealing sleeve 25 is provided with a through hole 251. The end of the sealing sleeve 25 is provided with a suction pipe 252. The suction force of the second wheel 22 is greater than that of the first wheel 21.

[0030] The suction force of the second disc 22 is greater than that of the first disc 21, ensuring that when the filter rod rotates from the highest point to the lowest point on the first disc 21, it can be detached from the first disc 21 by the suction force and be sucked into the adsorption groove on the second disc 22.

[0031] In this embodiment, the sealing needle structure 24 includes a pressure-bearing head 241, a sealing needle 242, and a limiting head 243. The pressure-bearing head 241 and the limiting head 243 are located at both ends of the sealing needle 242. The sealing needle 242 is provided with a through hole identical to the air hole 231. An elastic element 244 is provided on the inner side of the pressure-bearing head 241. A limiting needle 245 is provided on the inner side of the limiting head 243. The limiting needle 245 can be slidably inserted into the first wheel 21 and the second wheel 22. When the elastic element 244 pushes against the pressure-bearing head 241, the through hole is aligned with the air hole 231, allowing airflow to pass through.

[0032] The electric actuator 7 pushes the pressure head 241 to compress the elastic element 244, and the through hole of the sealing needle 242 moves laterally and is no longer aligned with the air hole 231, blocking the negative pressure and causing the filter rod to lose its adsorption force. The limiting pin 245 is inserted into the limiting groove of the wheel to restrict the rotation of the sealing pin 242 and ensure that the through hole of the sealing pin 242 is completely aligned with the air hole 231. When the electric actuator 7 retracts, the elastic element 244 pushes the pressure head 241 to reset, and the through hole of the sealing needle 242 realigns with the air hole 231, restoring the negative pressure adsorption state. In this embodiment, the detection light source includes a linear array light source, a surface array light source, and a backlight light source, all of which are disposed inside the outer casing 1.

[0033] Linear array light source: Installed on the inner side of the outer cover 1 along the tangent of the wheel, with the height flush with the center of the filter rod. It adopts a high-brightness LED strip light source with a wavelength of 520nm green light to avoid interference from reflection of the filter rod material. It illuminates parallel to the filter rod axis with a light intensity ≥10000 lux and uniformity ≥95%. Area array light source: Vertically illuminates the top surface of the filter rod, with a ring-shaped coaxial light source and a diameter slightly larger than the filter rod, providing radially uniform diffuse reflection to highlight surface defects; Backlight source: Used to detect uneven density inside the filter rod, such as insufficient filling of filter cotton fibers. Infrared LED transmission light source is used.

[0034] Multispectral light sources are matched with the reflective properties of filter rod materials such as cellulose acetate to avoid misjudgment caused by the superposition of reflected light from adjacent filter rods; Linear array light source highlights surface texture, area array light source detects top flatness, backlight light source detects internal filling of filter rod.

[0035] In this embodiment, the visual detection structure 4 includes four groups of cameras arranged from the inside of the housing 1.

[0036] The four groups of linear array cameras are symmetrically installed on the inside of the housing 1, with the camera lenses facing the wheel discs. The cameras are connected to image acquisition cards, which communicate with PLC.

[0037] The four groups of cameras respectively collect the lower blind area to avoid tiling during transportation; Linear array cameras cooperate with filter rod rotation to achieve high-resolution imaging of filter rod surface defects. Linear array cameras and area array cameras are selected, covering the full length of the filter rod in the axial direction and covering the radial circumference. The linear array camera has a resolution of ≥4096 pixels and a frame rate of ≥10kHz, suitable for filter rod length. The area array camera has a resolution of ≥5 million pixels and a frame rate of ≥30fps, used for high-definition shooting of radial defects such as roundness and stains.

[0038] In this embodiment, the power structure 5 includes a motor 51 and a synchronous belt 52. The output shaft of the motor 51 is connected to the synchronous pulley of the synchronous belt 52. The mounting shafts of the wheel disc one 21 and the wheel disc two 22 are respectively connected to the two synchronous pulleys of the synchronous belt 52.

[0039] The synchronous belt 52 drives the synchronous rotation of the two wheel discs, ensuring that the filter rod always maintains a horizontal posture during transportation.

[0040] In this embodiment, the conveyor belt structure 6 includes a conveyor belt one 61 and a conveyor belt two 62. The conveyor belt one 61 is arranged below the lowest point of the wheel disc two 22. The conveyor belt two 62 is arranged at a position 90° rotated in the rotation direction of the wheel disc two 22. The position and number of the electric push rods 7 correspond to the arrangement of the conveyor belt one 61 and the conveyor belt two 62.

[0041] The conveyor belt one 61 transports the non-defective filter rod to the next process; The conveyor belt two 62 transports the screened defective filter rod to the scrap box.

[0042] The electric push rod 7 is an electric cylinder installed on the inside of the housing 1 corresponding to the positions of the conveyor belt one 61 and the conveyor belt two 62. When the visual detection structure 4 and the detection light source cooperate to detect the filter stick, when the defective filter stick is identified, the corresponding adsorption groove 23 will carry the defective filter stick to the position of the conveying belt two 62 with the rotation of the wheel disc two 22, and then the pressure head 241 at the adsorption groove 23 will be pushed by the electric push rod 7, so that the air hole 231 loses the suction force and falls to the conveying belt two 62, if the filter stick is not defective, the filter stick will fall on the conveying belt one 61 by the pushing of the electric push rod 7.

[0043] Working principle: The formed filter stick falls vertically into the guide hole 11 through the upstream equipment, and a single one enters the adsorption groove 23 of the wheel disc one 21; The wheel disc one 21 and the wheel disc two 22 rotate under the driving of the power structure 5, the filter stick is lifted by the arc surface of the adsorption groove 23, the air hole 231 is sucked to negative pressure through the sealing sleeve 25, and the filter stick is firmly adsorbed, at this time, most of the surface of the filter stick will be exposed on the wheel disc one 21; The two wheels rotate synchronously, and the filter stick on the wheel disc one 21 is detected by the detection light source and the visual detection structure 4 during rotation, the filter stick moves along the adsorption groove 23 to the lowest point of the wheel disc one 21, which is also the highest point of the wheel disc two 22, at this time, the suction force of the wheel disc two 22 is slightly greater than that of the wheel disc one 21, the filter stick is separated from the adsorption groove 23 of the wheel disc one 21 and is adsorbed by the adsorption groove 23 of the wheel disc two 22, which makes the outermost position of the filter stick on the wheel disc one 21 change to the innermost position of the wheel disc two 22, and the position covered when located on the wheel disc one 21 is exposed again; The wheel disc two 22 continues to rotate, and the filter stick is detected again by the detection light source and the visual detection structure 4, and the filter stick moves along the adsorption groove 23 to above the conveying belt one 61, if the filter stick is qualified, the filter stick falls into the conveying belt one 61; If the filter stick is defective, it falls into the conveying belt two 62 and is transferred into the waste channel.

[0044] Based on the above, compared with the traditional flat conveying mode, the filter sticks are not overlapped, closely arranged and parallel in the vertical adsorption and conveying of the wheel disc, and the detection light source and the visual detection structure are matched to complete the detection of the complete surface of the filter stick. The misjudgment rate caused by the interference of the reflection light of adjacent filter sticks is greatly reduced.

[0045] The above describes the application by way of example with reference to the drawings. Obviously, the specific implementation of the application is not limited to the above mode, and various non-essential improvements or direct application of the inventive concept and technical solution to other occasions without improvement are within the protection scope of the application.

Claims

1. A defective filter rod detection and screening apparatus, characterized by: The filter rod moving structure (2) is arranged inside the outer cover (1), and the detection light source is arranged in the outer cover (1); The outer cover (1) is internally provided with a visual detection structure (4), and the visual detection structure (4) is used for collecting filter rod image data; The filter rod moving structure (2) comprises a wheel disc one (21) and a wheel disc two (22), the wheel disc one (21) is arranged above the wheel disc two (2), the wheel disc one (21) and the wheel disc two (22) are both provided with filter rod adsorption grooves (23), and the mounting shafts of the wheel disc one (21) and the wheel disc two (22) are connected to the power structure (5); The bottom of the adsorption groove (23) is provided with an air hole (231); The wheel disc one (21) and the wheel disc two (22) are provided with a sealing needle structure (24), and the sealing needle structure (24) transversely penetrates all the air holes (231); The sealing needle structure (24) can move transversely to close the air holes (231) under the pushing of an electric push rod (7); The wheel disc two (22) is provided below with a conveying belt structure (6).

2. A defective filter rod detection and screening apparatus according to claim 1, characterised in that: The top of the outer cover (1) is provided with a guide hole (11), the outlet of the guide hole (11) is located above the highest point of the wheel disc one (21), and the width of the guide hole (11) allows a single filter rod to pass through.

3. A defective filter rod detection and screening apparatus according to claim 1, wherein: The adsorption grooves (23) are arranged at equal intervals on the edges of the wheel disc one (21) and the wheel disc two (22), the adsorption grooves (23) are circular arc-shaped and have the same inner diameter as the diameter of the filter rod, and the depth of the adsorption grooves (23) is 1 / 4-1 / 3 of the groove diameter.

4. A defective filter rod detection and screening apparatus according to claim 1, characterized in that: The lower end of the air hole (231) is connected to the central hole of the wheel disc one (21) and the wheel disc two (22), and the central hole is internally provided with a sealing sleeve (25).

5. A defective filter rod detection and screening apparatus according to claim 4, characterised in that: Both ends of the sealing sleeve (25) are sealingly connected to the central hole through sealing strips, the cylinder wall of the sealing sleeve (25) is provided with a through hole (251), the end of the sealing sleeve (25) is provided with a suction pipe (252), and the suction force of the wheel disc two (22) is greater than that of the wheel disc one (21).

6. A defective filter rod detection and screening apparatus according to claim 1, wherein: The sealing needle structure (24) comprises a pressure head (241), a sealing needle (242) and a limiting head (243), the pressure head (241) and the limiting head (243) are respectively located at both ends of the sealing needle (242), the sealing needle (242) is provided with the same through hole as the air hole (231), the inner side of the pressure head (241) is provided with an elastic member (244), the inner side surface of the limiting head (243) is provided with a limiting needle (245), the limiting needle (245) can be slidably inserted into the wheel disc one (21) and the wheel disc two (22), and the through hole is aligned with the air hole (231) when the elastic member (244) pushes the pressure head (241), so that air flow passes through.

7. A defective filter rod detection and screening apparatus according to claim 1, wherein: The detection light source comprises a linear array light source, a plane array light source and a backlight light source, and the detection light source is arranged in the outer cover (1).

8. A defective filter rod detection and screening apparatus according to claim 1, wherein: The visual detection structure (4) comprises four groups of cameras arranged on the inner side of the outer cover (1).

9. A defective filter rod detection and screening apparatus according to claim 1, wherein: The power structure (5) comprises a motor (51) and a synchronous belt (52), an output shaft of the motor (51) is connected to a synchronous wheel of the synchronous belt (52), and the mounting shafts of the wheel disc one (21) and the wheel disc two (22) are respectively connected to two synchronous wheels of the synchronous belt (52).

10. A defective filter rod detection and screening apparatus according to claim 1, wherein: The conveying belt structure (6) comprises a conveying belt one (61) and a conveying belt two (62), the conveying belt one (61) is arranged below the lowest point of the wheel disc two (22), the conveying belt two (62) is arranged at a position after rotating 90° in the rotating direction of the wheel disc two (22), and the positions and the number of the electric push rods (7) are arranged corresponding to the conveying belt one (61) and the conveying belt two (62).

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