Filter rod detection and rejection device and method

Abstract

The present invention provides a filter rod detection and rejection device and method, wherein a mounting part is provided on a workbench, a detection roller is provided on the mounting part, a plurality of detection material troughs are evenly provided along the circumference of the detection roller, a negative pressure adsorption mechanism is provided on the workbench, an output end of the negative pressure adsorption mechanism is connected to each detection material trough, a positive pressure rejection mechanism is provided on the workbench, a visual inspection mechanism is provided at one end of the detection roller, a timing mechanism is connected to the detection roller, and a control box is electrically connected to the positive pressure rejection mechanism, the visual inspection mechanism, and the timing mechanism. By providing the detection roller and the negative pressure adsorption mechanism, the present invention enables the material to be fixed on the detection roller and to pass through the visual inspection mechanism in sequence as the detection roller rotates, so as to facilitate detection by the visual inspection mechanism. At the same time, by providing the timing mechanism, the positive pressure rejection mechanism, and the control mechanism, the filter rod detection and rejection device can record the position of unqualified filter rods in real time. When the unqualified filter rod reaches the rejection station, it is immediately rejected, thereby greatly improving production efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of detection equipment, and more specifically, relates to a filter rod detection and rejection device. In addition, the present invention also relates to a filter rod detection and rejection method. Background Art

[0002] Machine vision technology is a high-tech system that integrates computer science, optics, and electronic information technology. It uses a camera to capture images of objects to be inspected and processes and analyzes them through software, completing corresponding operations and judgments based on pre-set programs.

[0003] Machine vision technology offers fast inspection speed, high accuracy, and objective and reliable results. Combined with appropriate detection algorithms, it can quickly and accurately detect surface defects in products, making it one of the most promising inspection methods in intelligent manufacturing. In recent years, advances in semiconductor technology, computer technology, and image processing algorithms have significantly increased the efficiency of machine vision inspection.

[0004] Today, visual inspection systems are widely used in cigarette manufacturers, such as small box and carton appearance inspectors, inner frame paper and aluminum foil appearance inspectors, and full cigarette appearance inspectors. However, online inspection of filter rod core deviation, especially when achieving high-speed sorting of 4,200 sticks per minute, remains a challenge, making online targeted rejection impossible. Summary of the Invention

[0005] The object of the present invention is to provide a filter rod detection and rejection device, which can be used to reject unqualified filter rods at a fixed point, thereby greatly improving production efficiency.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a filter rod detection and rejection device, including a workbench, a detection roller, a negative pressure adsorption mechanism, a positive pressure rejection mechanism, a visual detection mechanism, a timing mechanism and a control box, wherein a mounting part is provided on the top of the workbench; the detection roller is rotatably arranged on the mounting part, and a plurality of detection material troughs are evenly arranged along the circumference of the detection roller, and a loading station and a unloading station are provided on both sides of the detection roller, and the filter rod to be detected is supplied to the detection roller by the loading station, and the filter rod is arranged in the detection material trough; the filter rod that passes the inspection enters the unloading station; the negative pressure adsorption mechanism is arranged on the workbench, and the output end of the negative pressure adsorption mechanism is connected with each of the detection material troughs, and the negative pressure adsorption mechanism is used to drive the detection material trough to be in a negative pressure state to fix the filter rod in the detection material trough; the positive pressure rejection mechanism is arranged on the workbench, and the output end of the positive pressure rejection mechanism is arranged upstream of the unloading station, and each of the detection material troughs can be connected with the positive pressure material trough in sequence due to the rotation of the detection roller. The output end of the rejection mechanism is connected, and the positive pressure rejection mechanism is used to drive the detection trough connected to it to be in a positive pressure state to reject the filter rods in the detection trough; the visual inspection mechanism is provided at one end of the detection roller, and the visual inspection mechanism is used to detect whether the filter rods on the detection roller are qualified or not; the timing mechanism is connected to the detection roller, and the timing mechanism is used to measure the rotation time of the detection roller; the control box is provided on the workbench, and the control box is electrically connected to the positive pressure rejection mechanism, the visual inspection mechanism and the timing mechanism, and the control box can receive the signal of the visual inspection mechanism and the timing signal of the timing mechanism. When the detection signal of the visual inspection mechanism is unqualified, the timing mechanism starts timing. When the time measured by the timing mechanism is the same as the time taken for the preset detection trough to move from the detection station of the visual inspection mechanism to the time when it is connected to the positive pressure rejection mechanism, the control box controls the positive pressure rejection mechanism to open, and after the preset time, the positive pressure rejection mechanism is closed.

[0007] In a possible implementation, the mounting member is box-shaped, a mounting through-hole is provided on the mounting member, and the power output end of the negative pressure adsorption mechanism is connected to the inner cavity of the mounting member; the detection roller includes a drive shaft, a detection sleeve, a connecting sleeve, a first motor, a reducer and a first belt, the drive shaft is rotatably arranged in the mounting through-hole, the first motor is arranged on one side of the mounting member, the reducer is connected to the power output end of the first motor, the first belt is connected between the power output end of the reducer and the drive shaft, a first sealing ring is provided on the drive shaft, mounting grooves are provided at both ends of the mounting through-hole, the first sealing ring abuts against the mounting member, and the first sealing ring is provided in one of the mounting grooves, and the diameter of the mounting groove is the same as the diameter of the first sealing ring; a second Sealing ring piece, the second sealing ring piece is arranged in the other mounting groove, and the second sealing ring piece abuts against the mounting piece, the diameter of the mounting through hole is larger than the inner diameter of the second sealing ring piece, the inner diameter of the second sealing ring piece is larger than the diameter of the drive shaft, the other end of the connecting sleeve is provided with a support hole, the drive shaft is rotatably arranged in the support hole, and the side wall of the drive shaft abuts against the support hole, and an air groove is provided on the side wall of the connecting sleeve; the detection sleeve is cylindrical, and the detection sleeve is arranged on the outside of the connecting sleeve, the detection sleeve is connected to the drive shaft by a connecting piece, so that the detection sleeve can rotate with the rotation of the drive shaft, and an air guide cavity is provided between the detection sleeve and the connecting sleeve, the detection material trough is provided on the side wall of the detection sleeve, and the detection material trough is connected with the air guide cavity through a plurality of negative pressure air holes.

[0008] In one possible implementation, the negative pressure adsorption mechanism includes a negative pressure fan, a solenoid valve and a connecting pipe. The negative pressure fan is arranged on the workbench, one end of the connecting pipe is connected to the negative pressure fan, and the other end of the connecting pipe is connected to the mounting part through a pagoda head. The solenoid valve is arranged on the connecting pipe, and a pressure relief valve is provided on the connecting pipe.

[0009] In one possible implementation, the positive pressure rejection mechanism includes an air pump, a high-speed rejection valve, and an air guide pipe. The air pump is arranged on the workbench, and an air guide groove is provided on the connecting sleeve. The air guide groove extends along the axial direction of the connecting sleeve, and an air guide hole is provided in connection with the air guide groove. The air guide hole is opposite to the rejection station, one end of the air guide pipe is connected to the air pump, and the other end of the air guide pipe is connected to the air guide groove. A high-speed rejection valve is provided on the air guide pipe, and the high-speed rejection valve is electrically connected to the control box.

[0010] In one possible implementation, an isolation component is provided on the connecting sleeve, and the isolation component is opposite to the rejection station. When the positive pressure rejection mechanism is closed, the negative pressure air hole is connected to the air guide cavity, and the negative pressure air hole and the air guide cavity are disconnected; when the positive pressure rejection mechanism is opened, the negative pressure air hole and the air guide cavity are disconnected, and the negative pressure air hole and the air guide cavity are disconnected.

[0011] In one possible implementation, the isolation assembly includes an isolation box, multiple isolation tubes and an isolation block. The top and bottom openings of the isolation box are arranged, the top of the isolation box abuts against the inner wall of the detection sleeve, and the bottom of the isolation box is fixed on the connecting sleeve. The isolation box covers the top of the air guide hole and the bottom end of the negative pressure air hole. A negative pressure window is provided on the side wall of the isolation box, and an isolation plate is rotatably provided in the negative pressure window. The isolation tubes correspond to the negative pressure air holes one by one, one end of the isolation tubes is fixed on the inner wall of the detection sleeve and is connected to the corresponding negative pressure air hole, and the other end of the isolation tube is provided with an isolation section, which blocks the isolation tube, and a T-shaped Hole, the inner cavity of the isolation tube is connected with the inner cavity of the isolation box through the T-shaped hole, the isolation block is slidably arranged in the isolation box, and a plurality of first through holes are provided on the isolation block, and the first through holes correspond to the isolation tubes one by one, and the isolation section is inserted into the corresponding first through holes; in the initial state, the isolation block is arranged below the T-shaped hole, and the isolation block is arranged below the isolation plate; the isolation plate can make the air guide cavity connected with the interior of the isolation box due to rotation; the isolation block can reset the isolation plate due to sliding up to release the connection between the air guide cavity and the interior of the isolation box, and the isolation block is arranged above the T-shaped hole, and the air guide hole can be connected with the T-shaped hole through the inner cavity of the isolation box.

[0012] In one possible implementation, a baffle is provided on the outer wall of the isolation box, the baffle extends downward, and the baffle partially blocks the negative pressure window near the top. When the isolation plate is reset, the isolation plate abuts against the baffle.

[0013] In one possible implementation, a reset groove is provided on the side wall of the connecting sleeve, a reset spring is provided in the reset groove, the top end of the reset spring is connected to the isolation block, and the bottom end of the reset spring is connected to the bottom of the reset groove, and in the initial state, the reset spring is in a natural state.

[0014] In one possible implementation, the timing mechanism includes a code disk and a proximity switch, the code disk is connected to the first motor so that the code disk and the drive shaft rotate simultaneously, an L-plate is provided on the workbench, the L-plate is provided on one side of the code disk, the proximity switch is provided on the L-plate, and the proximity switch is arranged toward the code disk, the proximity switch is connected to the control box, when the gear on the code disk passes the proximity switch, the proximity switch will output a pulse to the control box, when the filter rod is judged to be unqualified, the control box records the number of pulses at this time, the control box can record the number of pulses in real time, and calculate the difference between the real-time pulse number and the pulse number recorded when the detection is unqualified, and the control box is preset with the corresponding pulse number of the detection trough from the detection station to the rejection station.

[0015] The beneficial effect of the filter rod detection and rejection device provided by the present invention is that, compared with the prior art, the present invention arranges a detection roller and a negative pressure adsorption mechanism so that the material to be detected can be fixed on the detection roller and pass through the visual detection mechanism in sequence as the detection roller rotates, so as to facilitate detection by the visual detection mechanism. At the same time, by arranging a timing mechanism, a positive pressure rejection mechanism and a control mechanism, the filter rod detection and rejection device can record the position of unqualified filter rods in real time. When the unqualified filter stick reaches the rejection station, it is immediately rejected, thereby greatly improving production efficiency.

[0016] The present invention also relates to a filter rod detection and rejection method, which uses the aforementioned filter rod detection and rejection device to detect filter rods, comprising:

[0017] a. Build a filter rod detection and rejection device and conduct an operational test to ensure that the filter rod can be normally adsorbed on the detection roller;

[0018] b. After the filter rod detection and rejection device is operating normally, determine the image acquisition station of the visual inspection mechanism and the rejection station of the positive pressure rejection mechanism, and obtain the number of pulses emitted by the timing mechanism when the same detection trough moves between the two stations;

[0019] c. When the filter rod passes the image acquisition position, the visual detection mechanism is triggered to acquire the image, and the control box records the number of pulses at this moment;

[0020] d. The filter rod is moved from the image acquisition position to the rejection position, and the difference between the number of real-time pulses and the number of pulses recorded in step c is calculated;

[0021] e. When the difference in the number of pulses calculated in step d is equal to the preset value, the control box controls the high-speed rejection valve to be energized and the filter rod is rejected.

[0022] The filter rod detection and rejection method provided by the present invention detects filter rods by using the filter rod detection and rejection device, and rejects unqualified filter rods at fixed points, thereby greatly improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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.

[0024] Figure 1 A schematic structural diagram of a filter rod detection and rejection device provided by an embodiment of the present invention from one angle;

[0025] Figure 2 for Figure 1 A magnified view of part A;

[0026] Figure 3 A schematic structural diagram of a filter rod detection and rejection device from another angle provided in an embodiment of the present invention;

[0027] Figure 4 for Figure 3 A magnified view of part B;

[0028] Figure 5 A schematic structural diagram of a connecting sleeve provided in an embodiment of the present invention;

[0029] Figure 6 A cross-sectional view of a detection roller provided in an embodiment of the present invention;

[0030] Figure 7 A schematic diagram of the structure of the isolation component in the initial state provided by an embodiment of the present invention;

[0031] Figure 8 A schematic diagram of the structure of the isolation assembly provided by an embodiment of the present invention when the positive pressure rejection mechanism is not working;

[0032] Figure 9 A schematic diagram of the structure of the isolation assembly provided by an embodiment of the present invention when the positive pressure rejection mechanism starts working;

[0033] Figure 10 A schematic diagram of the structure of the positive pressure rejection mechanism of the isolation assembly provided by an embodiment of the present invention when the rejection is completed;

[0034] Figure 11 A schematic structural diagram of a detection kit provided in an embodiment of the present invention;

[0035] Figure 12 This is a schematic structural diagram of a sampling roller provided in an embodiment of the present invention.

[0036] Among them, the reference numerals in the figures are as follows:

[0037] 1. Workbench; 2. Detection roller; 3. Negative pressure adsorption mechanism; 4. Positive pressure rejection mechanism; 5. Visual inspection mechanism; 6. Timing mechanism; 7. Control box; 8. Detection roller;

[0038] 101. Mounting piece; 102. Mounting hole;

[0039] 201, drive shaft; 202, inspection sleeve; 203, connecting sleeve; 204, first motor; 205, first belt; 206, first sealing ring; 207, second sealing ring; 208, air passage; 209, connecting piece; 210, air guide cavity; 211, negative pressure air hole; 212, inspection trough; 213, loading station; 214, unloading station; 215, air guide trough; 216, air guide hole; 217, isolation assembly; 218, isolation box; 219, isolation tube; 220, isolation block; 221, negative pressure window; 222, isolation plate; 223, isolation section; 224, T-shaped hole; 225, first through hole; 226, baffle; 227, reducer;

[0040] 301, negative pressure fan; 302, solenoid valve; 303, connecting pipe; 304, pressure relief valve; 305, reset groove; 306, reset spring;

[0041] 401, air pump; 402, high-speed rejection valve; 403, air guide tube;

[0042] 601, L-plate; 602, proximity switch; 603, code disk;

[0043] 801, air hole; 802, adsorption chamber; 803, sealing plate; 804, transfer station. DETAILED DESCRIPTION

[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0045] It should be further explained that the drawings and implementation methods of the present invention mainly describe the concept of the present invention. On the basis of this concept, the specific forms and settings of some connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, on the premise that those skilled in the art understand the concept of the present invention, those skilled in the art can implement the above-mentioned specific forms and settings in a well-known manner.

[0046] When an element is referred to as being “fixed to” or “disposed on” another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0047] The directions or positional relationships indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0048] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, and "several" means one or more, unless otherwise specifically defined.

[0049] Example 1

[0050] The filter rod detection and rejection device provided by the present invention is now described.

[0051] Please also refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 and Figure 12The filter rod detection and rejection device includes a workbench 1, a detection roller 2, a negative pressure adsorption mechanism 3, a positive pressure rejection mechanism 4, a visual detection mechanism 5, a timing mechanism 6 and a control box 7. Among them, a mounting member 101 is provided on the top of the workbench 1, and the detection roller 2 is rotatably arranged on the mounting member 101. A plurality of detection material troughs 212 are evenly arranged along the circumference of the detection roller 2. A loading station 213 and a unloading station 214 are provided on both sides of the detection roller 2. The filter rod to be detected is supplied to the detection roller 2 by the loading station 213, and the filter rod to be detected is supplied to the detection roller 2 by the loading station 213, and the filter rod to be detected is supplied to the detection roller 2 by the loading station 213. The rod is arranged in the detection trough 212, and the qualified filter rod enters the unloading station 214. The negative pressure adsorption mechanism 3 is arranged on the workbench 1, and the output end of the negative pressure adsorption mechanism 3 is connected with each detection trough 212. The negative pressure adsorption mechanism 3 is used to drive the trough to a negative pressure state to fix the filter rod in the detection trough 212. The positive pressure rejection mechanism 4 is arranged on the workbench 1, and the output end of the positive pressure rejection mechanism 4 is located upstream of the unloading station 214. Each detection trough 212 can be connected with the detection roller 2 in sequence due to the rotation of the detection roller 2. The output end of the positive pressure rejection mechanism 4 is turned on, and the positive pressure rejection mechanism 4 is used to drive the detection trough 212 connected to it to be in a positive pressure state to reject the filter rod in the detection trough 212. The visual inspection mechanism 5 is arranged at one end of the detection roller 2, and the visual inspection mechanism is used to detect whether the filter rod on the detection roller 2 is qualified or not. The timing mechanism 6 is connected to the detection roller 2, and the timing mechanism 6 is used to measure the rotation time of the detection roller 2. The control box 7 is arranged on the workbench 1, and the control box 7 is electrically connected to the positive pressure rejection mechanism 4, the visual inspection mechanism 5 and the timing mechanism 6. The control box 7 can receive the signal of the visual inspection mechanism 5 and the timing signal of the timing mechanism 6. When the detection signal of the visual inspection mechanism 5 is unqualified, the timing mechanism 6 starts timing. When the time measured by the timing mechanism 6 is the same as the time taken for the preset detection trough 212 to move from the inspection station of the visual inspection mechanism 5 to be connected to the positive pressure rejection mechanism 4, the control box 7 controls the positive pressure rejection mechanism 4 to open, and after the preset time, the positive pressure rejection mechanism 4 is closed.

[0052] The beneficial effect of the filter rod detection and rejection device provided in this embodiment is: compared with the prior art, the filter rod detection and rejection device provided in this embodiment cooperates with the detection roller 2 and the negative pressure adsorption mechanism 3, so that the material to be detected can be fixed on the detection roller 2 and pass through the visual detection mechanism 5 in sequence as the detection roller 2 rotates, so as to facilitate the detection of the visual detection mechanism 5. At the same time, by setting the timing mechanism 6, the positive pressure rejection mechanism 4 and the control mechanism, the filter rod detection and rejection device can record the position of unqualified filter rods in real time. When the unqualified filter stick reaches the rejection station, it is immediately rejected, thereby greatly improving production efficiency.

[0053] In this embodiment, the mounting member 101 is box-shaped, and a mounting through hole 102 is provided on the mounting member 101 . The power output end of the negative pressure adsorption mechanism 3 is connected to the inner cavity of the mounting member 101 . The detection roller 2 includes a drive shaft 201, a detection sleeve 202, a connecting sleeve 203, a first motor 204, a reducer 227 and a first belt 205. The drive shaft 201 is rotatably arranged in the mounting hole 102. The first motor 204 is arranged on one side of the mounting member 101. The reducer 227 is connected to the power output end of the first motor 204. The first belt 205 is connected between the power output end of the reducer 227 and the drive shaft 201. A first sealing ring piece 206 is provided on the drive shaft 201. Mounting grooves are provided at both ends of the mounting hole. The first sealing ring piece 206 abuts against the mounting member 101, and the first sealing ring piece 206 is provided in one mounting groove thereof. The diameter of the mounting groove is the same as that of the first sealing ring piece 206. A second sealing ring piece 207 is provided at one end of the connecting sleeve 203. The second sealing ring piece 207 is provided in another mounting groove, and the first sealing ring piece 206 is provided in the second mounting groove. The second sealing ring piece 207 abuts against the mounting piece 101, the diameter of the mounting hole is larger than the inner diameter of the second sealing ring piece 207, the inner diameter of the second sealing ring piece 207 is larger than the diameter of the drive shaft, the other end of the connecting sleeve 203 is provided with a support hole, the drive shaft 201 is rotatably arranged in the support hole, and the side wall of the drive shaft 201 abuts against the support hole, and an air groove 208 is provided on the side wall of the connecting sleeve 203. The detection sleeve 202 is cylindrical, and the detection sleeve 202 is sleeved on the outside of the connecting sleeve 203. The detection sleeve 202 is connected to the drive shaft 201 by a connecting piece 209, so that the detection sleeve 202 can rotate with the rotation of the drive shaft 201. An air guide cavity 210 is provided between the detection sleeve 202 and the connecting sleeve 203, and a detection material trough 212 is provided on the side wall of the detection sleeve 202, and the detection material trough 212 is connected to the air guide cavity 210 through multiple negative pressure air holes 211.

[0054] During operation of the device, the negative pressure adsorption mechanism 3 continuously extracts air from the mounting member 101 to maintain a low vacuum state within the mounting member 101. The detection roller 2 is connected to the mounting member 101, and the detection trough 212 of the detection sleeve 202 is connected to the mounting member 101 through the negative pressure air holes 211, the negative pressure cavity, the air passage groove 208, and the internal space of the connecting sleeve 203, thereby maintaining a negative pressure state in the detection trough 212, thereby being able to adsorb the filter stick in the detection trough 212.

[0055] Specifically, the negative pressure adsorption mechanism 3 includes a negative pressure blower 301, a solenoid valve 302, and a connecting pipe 303. The negative pressure blower 301 is mounted on the workbench 1. One end of the connecting pipe 303 is connected to the negative pressure blower 301, and the other end of the connecting pipe 303 is connected to the mounting member 101 via a pagoda head. The solenoid valve 302 is mounted on the connecting pipe 303, and a pressure relief valve 304 is provided on the connecting pipe 303. The above arrangement is simple in structure and easy to use, and all components are readily available, which facilitates the promotion and application of the filter rod detection and rejection device of the present invention.

[0056] In addition, the positive pressure rejection mechanism 4 includes an air pump 401, a high-speed rejection valve 402, and an air guide pipe 403. The air pump 401 is arranged on the workbench 1, and an air guide groove 215 is provided on the connecting sleeve 203. The air guide groove 215 extends along the axial direction of the connecting sleeve 203, and is connected to the air guide groove 215 and is provided with an air guide hole 216. The air guide hole 216 is opposite to the rejection station. One end of the air guide pipe 403 is connected to the air pump 401, and the other end of the air guide pipe 403 is connected to the air guide groove 215. A high-speed rejection valve 402 is provided on the air guide pipe 403, and the high-speed rejection valve 402 is electrically connected to the control box 7.

[0057] Rejecting unqualified filter sticks from the rejection station relies on high-speed rejection valve 402. The air inlet of high-speed rejection valve 402 is connected to the air pump 401 or air compressor, and the air outlet is connected to the air guide groove 215 of the connecting sleeve 203. When an unqualified filter stick reaches the rejection position, the control box 7 sends a signal to open high-speed rejection valve 402, setting the positive pressure to be greater than the negative pressure, and the filter stick is blown off and rejected.

[0058] As a preferred technical solution, an isolation assembly 217 is provided on the connecting sleeve 203. The isolation assembly 217 faces the rejection station. When the positive-pressure rejection mechanism 4 is closed, the negative-pressure air hole 211 is connected to the air guide cavity 210, and the negative-pressure air hole 211 and the air guide cavity 216 are disconnected. When the positive-pressure rejection mechanism 4 is opened, the negative-pressure air hole 211 and the air guide cavity 210 are disconnected, and the negative-pressure air hole 211 and the air guide cavity 210 are disconnected. The provision of the isolation assembly 217 prevents mutual interference between the negative-pressure adsorption mechanism 3 and the positive-pressure rejection mechanism 4.

[0059] Specifically, the isolation assembly 217 includes an isolation box 218, a plurality of isolation tubes 219 and an isolation block 220. The top and bottom openings of the isolation box 218 are arranged. The top of the isolation box 218 abuts against the inner wall of the detection sleeve 202. The bottom of the isolation box 218 is fixed on the connecting sleeve 203. The isolation box 218 covers the top of the air guide hole 216 and the bottom end of the negative pressure air hole 211. A negative pressure window 221 is provided on the side wall of the isolation box 218. An isolation plate 222 is rotatably provided in the negative pressure window 221. The isolation tubes 219 correspond one to one with the negative pressure air holes 211. The isolation tubes 219 correspond one to one with the negative pressure air holes 211. One end of 9 is fixed on the inner wall of the detection sleeve 202 and is connected to the corresponding negative pressure air hole 211. The other end of the isolation tube 219 is provided with an isolation section 223. The isolation section 223 blocks the isolation tube 219. A T-shaped hole 224 is provided on the isolation section 223. The inner cavity of the isolation tube 219 is connected to the inner cavity of the isolation box 218 through the T-shaped hole 224. The isolation block 220 is slidably arranged in the isolation box 218. A plurality of first through holes 225 are provided on the isolation block 220. The first through holes 225 correspond one-to-one to the isolation tube 219, and the isolation section 223 is inserted into the corresponding first through hole 225.

[0060] In the initial state, the isolation block 220 is located below the T-shaped hole 224, and the isolation block 220 is located below the isolation plate 222. At this time, the isolation plate 222 blocks the negative pressure window 221. When the negative pressure adsorption mechanism 3 starts to work, the isolation plate 222 is pushed by the air and rotates. The isolation plate 222 can make the air guide cavity 210 communicate with the interior of the isolation box 218 due to the rotation. At this time, the detection trough 212 of the rejection station is in a negative pressure state. When the positive pressure rejection mechanism 4 starts to work, the isolation block 220 can slide up to reset the isolation plate 222, thereby releasing the connection between the air guide cavity 210 and the interior of the isolation box 218. The isolation block 220 is located above the T-shaped hole 224, and the air guide hole 216 can be connected to the T-shaped hole 224 through the inner cavity of the isolation box 218. At this time, air can be ejected from the negative pressure air hole 211 into the detection trough 212, and the filter rod is blown off by the positive pressure air.

[0061] As a preferred technical solution, a baffle 226 is provided on the outer wall of the isolation box 218. The baffle 226 extends downward and partially blocks the negative pressure window near the top. When the isolation plate 222 is reset, the isolation plate 222 abuts against the baffle 226. The provision of the baffle 226 ensures that when the isolation plate 222 rotates, only the upper end rotates inward, thereby facilitating the reset of the isolation plate 222 when the isolation block 220 moves upward.

[0062] Furthermore, a reset groove 305 is provided on the sidewall of the connecting sleeve 203, within which a reset spring 306 is disposed. The top end of the reset spring 306 is connected to the isolation block 220, while the bottom end of the reset spring 306 is connected to the bottom of the reset groove 305. Initially, the reset spring 306 is in its natural position. The provision of the reset spring 306 facilitates the reset of the isolation block 220 when the positive pressure rejection mechanism 4 ceases operation. At this point, the isolation plate 222 can rotate again, placing the detection trough 212 of the rejection station in a negative pressure state.

[0063] In this embodiment, the timing mechanism 6 includes a code disk 603 and a proximity switch 602. The code disk 603 is connected to the first motor 204 so that the code disk 603 and the drive shaft 201 rotate simultaneously. An L plate 601 is provided on the workbench 1. The L plate 601 is provided on one side of the code disk 603. The proximity switch 602 is provided on the L plate 601, and the proximity switch 602 is arranged toward the code disk 603. The proximity switch 602 is connected to the control box 7. When the gear on the code disk 603 passes the proximity switch 602, the proximity switch 602 will output a pulse to the control box 7. When the filter rod is judged to be unqualified, the control box 7 records the number of pulses at this time. The control box 7 can record the number of pulses in real time and calculate the difference between the real-time pulse number and the pulse number recorded when the detection is unqualified. The control box 7 is preset with the corresponding pulse number of the detection trough 212 from the detection station to the rejection station.

[0064] Since the positions of the inspection and rejection stations are fixed, the number of pulses (let's call it C) that pass through the inspection trough 212 as it moves from the inspection station to the rejection station is also fixed. From the moment a filter rod image is inspected and determined to be unqualified, the control box 7 records the difference (let's call it D) between the number of pulses passing through the inspection trough 212 where the unqualified filter rod resides and the number of pulses at the inspection station. Obviously, D is an integer that starts at 0 and increases gradually. When C equals D, the filter rod has reached the rejection position.

[0065] This device uses a 12-tooth code disk 603. Both the reject and sampling hubs have 32 teeth. The reduction ratio of the reducer 227 is 8. Code disk 603 is mounted on the other end of the shaft of the first motor 204. For each revolution of the first motor 204, the proximity switch 602 outputs 12 pulses. When the motor rotates eight times, a total of 96 pulses are output. These pulses are recorded by a high-speed counter in the control box 7.

[0066] One rotation of the drive shaft 201 corresponds to 32 filter rods. Therefore, this study configured the visual inspection mechanism 5 to capture and inspect the filter rods every three pulses output by the proximity switch 602, while simultaneously recording the current reading of the high-speed counter (assumed to be m). As the filter rods move on the hub, the real-time reading of the high-speed counter (assumed to be n) is recorded. The inspection station is 13 teeth away from the rejection position, or 39 pulses. When the difference between m and n is 39 (the actual set value is slightly less than 39), indicating that the filter rods have reached the rejection position, the PLC in the control box 7 controls the opening and closing of the high-speed rejection valve 402, thereby completing the rejection of the filter rods.

[0067] The high-speed reject valve 402 used herein is model MAC 45A-BC1-DEFJ-1JM. According to the product manual, when the voltage is 24V, the solenoid valve 302 has a response time of 6ms when powered on and 2ms when powered off, with a maximum speed of 14,000 cycles / minute. The required inspection speed for the present invention is 4,200 filter rods / minute. The inspection time for each filter rod is approximately 14ms, and the time interval between two adjacent filter rods passing through the rejection position is also 14ms. Therefore, the response speed of the high-speed reject valve 402 meets this requirement.

[0068] Finally, the filter rod detection and rejection device of the present invention also includes a sampling roller 8, which is arranged on one side of the detection roller 2, and the structure of the sampling roller 8 is basically the same as that of the detection roller 2, except that the connecting sleeve 203 of the sampling roller 8 is not provided with an air groove 208, but an air hole 801 with an arc-shaped cross section. The air hole 801 is arranged toward the detection roller 2, and sealing plates 803 are provided at both ends of the air hole 801. The sealing plates 803 divide the air guide cavity 210 of the sampling roller 8 corresponding to the air hole 801 into an adsorption cavity 802. The sampling trough of the sampling roller 8 at the top of the adsorption cavity 802 is connected to the bottom of the detection trough 212 of the detection roller 2, which is recorded as a transfer station 804, so that the unqualified filter rods rejected by the detection roller 2 can be transferred to the sampling trough of the sampling roller 8. As the sampling roller 8 rotates, when the sampling trough moves to one side of the adsorption cavity 802, the filter rod falls.

[0069] During operation of the filter rod detection and rejection device of the present invention, a pulse distributor within the control box 7 divides the control signal into two paths. Two stepper motor controllers synchronously control the two first motors 204, thereby ensuring precise alignment of the detection trough 212 of the detection roller 2 with the sampling trough of the sampling roller 8, ensuring smooth filter rod transfer. The start / stop, speed, and direction of the first motors 204 are regulated by the stepper motor controller within the control box 7.

[0070] Example 2

[0071] The present invention also relates to a filter rod detection and rejection method, which uses the aforementioned filter rod detection and rejection device to detect the filter rod, including: a. Building a filter rod detection and rejection device, and performing an operation test to ensure that the filter rod can be normally adsorbed on the detection roller 2, b. After the filter rod detection and rejection device operates normally, the image acquisition station of the visual detection mechanism 5 and the rejection station of the positive pressure rejection mechanism 4 are determined to obtain the number of pulses emitted by the timing mechanism 6 when the same detection trough 212 moves between the two stations, c. When the filter rod passes through the image acquisition position, the visual detection mechanism 5 is triggered to perform image acquisition, and the control box 7 records the number of pulses at this moment. d. When the filter rod moves from the image acquisition position to the rejection position, the difference between the real-time pulse number and the pulse number recorded in step c is calculated. e. When the difference in the number of pulses calculated in step d is equal to the preset constant, the control box 7 controls the high-speed rejection valve 402 to energize, and the filter rod is rejected.

[0072] The filter rod detection and rejection method provided by the present invention detects filter rods by using the filter rod detection and rejection device, and rejects unqualified filter rods at fixed points, thereby greatly improving production efficiency.

[0073] In step b, the inspection station can be freely determined according to needs, and the rejection station needs to be determined according to the interface position of the air guide groove 215 on the connecting sleeve 203.

[0074] The difference in pulse counts between the filter rod inspection station and the filter rod rejection station is determined by the pulse trigger frequency collected by the visual inspection mechanism 5 and the number of inspection troughs 212 separating the inspection and rejection stations. In the present invention, three pulses are used to trigger a single capture test, and the inspection and rejection stations are separated by 13 hub teeth, resulting in a pulse difference of 39 between the inspection and rejection stations.

[0075] In step c, visual inspection mechanism 5 is triggered to take a picture. This is done externally by the camera, triggered by the rising edge of Line 1. The signal transmitter is proximity switch 602, which sends a signal to Line every three pulses. Furthermore, control box 7 in step c records the number of position pulses. This is accomplished using the high-speed counter HSC1 in the PLC within control box 7. Proximity switch 602 is connected to the PLC input. Each time proximity switch 602 pulses, the HSC1 counter increments by one.

[0076] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A filter rod detection and rejection device, characterized in that: include: A workbench (1) with a mounting member (101) on the top; A detection roller (2) is rotatably mounted on a mounting member (101), and a plurality of detection troughs (212) are evenly arranged along the circumference of the detection roller (2). A loading station (213) and a unloading station (214) are provided on both sides of the detection roller (2). Filter rods to be detected are supplied to the detection roller (2) by the loading station (213), and the filter rods are arranged in the detection troughs (212); filter rods that pass the detection enter the unloading station (214); A negative pressure adsorption mechanism (3) is provided on the workbench (1), wherein an output end of the negative pressure adsorption mechanism (3) is in communication with each of the detection troughs (212), and the negative pressure adsorption mechanism (3) is used to drive the detection troughs to a negative pressure state so as to fix the filter rod in the detection trough (212); A positive pressure rejection mechanism (4) is provided on the workbench (1), and an output end of the positive pressure rejection mechanism (4) is provided upstream of the unloading station (214). Each of the detection troughs (212) can be connected to the output end of the positive pressure rejection mechanism (4) in sequence due to the rotation of the detection roller (2). The positive pressure rejection mechanism (4) is used to drive the detection troughs (212) connected thereto to a positive pressure state so as to reject the filter rods in the detection troughs (212). The position where the detection roller (2) rejects unqualified filter rods is the rejection station; A visual inspection mechanism (5) is provided at one end of the inspection roller (2), and is used to inspect whether the filter rod on the inspection roller (2) is qualified or not. The corresponding position on the inspection roller (2) photographed by the visual inspection mechanism (5) is the inspection station; a timing mechanism (6) connected to the detection roller (2), the timing mechanism (6) being used to measure the rotation time of the detection roller (2); a control box (7) disposed on the workbench (1), the control box (7) being electrically connected to the positive pressure rejection mechanism (4), the visual inspection mechanism (5) and the timing mechanism (6); the control box (7) being capable of receiving a signal from the visual inspection mechanism (5) and a timing signal from the timing mechanism (6); when the detection signal from the visual inspection mechanism (5) is unqualified, the timing mechanism (6) starts timing; when the time measured by the timing mechanism (6) is the same as the time taken for the preset detection trough (212) to move from the detection station of the visual inspection mechanism (5) to the time taken for the detection trough (212) to be connected to the positive pressure rejection mechanism (4), the control box (7) controls the positive pressure rejection mechanism (4) to be turned on, and after the preset time has passed, the positive pressure rejection mechanism (4) is turned off; The mounting member (101) is box-shaped, and a mounting through hole (102) is provided on the mounting member (101). The power output end of the negative pressure adsorption mechanism (3) is connected to the inner cavity of the mounting member (101); The detection roller (2) comprises a drive shaft (201), a detection sleeve (202), a connecting sleeve (203), a first motor (204), a reducer (227) and a first belt (205); the drive shaft (201) is rotatably arranged in the mounting hole (102); the first motor (204) is arranged on one side of the mounting member (101); the reducer (227) is connected to the power output end of the first motor (204); and the first belt (205) is connected between the power output end of the reducer (227) and the drive shaft ( 201), a first sealing ring piece (206) is provided on the driving shaft (201), and mounting grooves are provided at both ends of the mounting through hole, the first sealing ring piece (206) abuts against the mounting member (101), and the first sealing ring piece (206) is provided in one of the mounting grooves, and the diameter of the mounting groove is the same as the diameter of the first sealing ring piece (206); a second sealing ring piece (207) is provided at one end of the connecting sleeve (203), and the second sealing ring piece (207) is provided in the other mounting groove, and the second sealing ring piece (207) is provided in the second mounting groove. The ring piece (207) is in contact with the mounting member (101), the diameter of the mounting hole is larger than the inner diameter of the second sealing ring piece (207), the inner diameter of the second sealing ring piece (207) is larger than the diameter of the drive shaft, the other end of the connecting sleeve (203) is provided with a support hole, the drive shaft (201) is rotatably arranged in the support hole, and the side wall of the drive shaft (201) is in contact with the support hole, and the side wall of the connecting sleeve (203) is provided with an air groove (208); the detection sleeve (202) is cylindrical, and the detection sleeve ( The detection sleeve (202) is sleeved on the outside of the connecting sleeve (203), the detection sleeve (202) is connected to the driving shaft (201) via a connecting piece (209), so that the detection sleeve (202) can rotate along with the rotation of the driving shaft (201), an air guide cavity (210) is provided between the detection sleeve (202) and the connecting sleeve (203), the detection trough (212) is provided on the side wall of the detection sleeve (202), and the detection trough (212) is communicated with the air guide cavity (210) via a plurality of negative pressure air holes (211); The positive pressure rejection mechanism (4) comprises an air pump (401), a high-speed rejection valve (402), and an air guide pipe (403); the air pump (401) is arranged on the workbench (1); an air guide groove (215) is provided on the connecting sleeve (203); the air guide groove (215) extends along the axial direction of the connecting sleeve (203); an air guide hole (216) is provided in connection with the air guide groove (215); the air guide hole (216) faces the rejection station; one end of the air guide pipe (403) is connected to the air pump (401); the other end of the air guide pipe (403) is connected to the air guide groove (215); a high-speed rejection valve (402) is provided on the air guide pipe (403); and the high-speed rejection valve (402) is electrically connected to the control box (7); An isolation component (217) is provided on the connecting sleeve (203), and the isolation component (217) faces the rejection station. When the positive pressure rejection mechanism (4) is closed, the negative pressure air hole (211) is connected to the air guide cavity (210), and the negative pressure air hole (211) and the air guide cavity (216) are disconnected; when the positive pressure rejection mechanism (4) is opened, the negative pressure air hole (211) and the air guide cavity (210) are disconnected, and the negative pressure air hole (211) and the air guide cavity (210) are disconnected; The isolation assembly (217) includes an isolation box (218), a plurality of isolation tubes (219) and an isolation block (220). The top and bottom of the isolation box (218) are arranged to be open. The top of the isolation box (218) abuts against the inner wall of the detection sleeve (202). The bottom of the isolation box (218) is fixed to the connecting sleeve (203). The isolation box (218) covers the top of the air guide hole (216) and the bottom of the negative pressure air hole (211). The side wall of the isolation box (218) is provided with a negative pressure air hole. A negative pressure window (221) is provided with an isolation plate (222) which is rotatable in the negative pressure window (221). The isolation tube (219) corresponds to the negative pressure air hole (211) in a one-to-one manner. One end of the isolation tube (219) is fixed on the inner wall of the detection sleeve (202) and is connected to the corresponding negative pressure air hole (211). The other end of the isolation tube (219) is provided with an isolation section (223). The isolation section (223) blocks the isolation tube (219). A T-shaped hole (224) is provided on the isolation section (223). The inner cavity of the tube (219) is connected to the inner cavity of the isolation box (218) through the T-shaped hole (224), and the isolation block (220) is slidably arranged in the isolation box (218). The isolation block (220) is provided with a plurality of first through holes (225), and the first through holes (225) correspond to the isolation tube (219) one by one. The isolation section (223) is inserted into the corresponding first through hole (225); in the initial state, the isolation block (220) is arranged below the T-shaped hole (224), and the isolation block (220) is provided with a plurality of first through holes (225). 20) is arranged below the isolation plate (222); the isolation plate (222) can rotate to connect the air guide cavity (210) with the interior of the isolation box (218); the isolation block (220) can slide up to reset the isolation plate (222) and release the connection between the air guide cavity (210) and the interior of the isolation box (218), and the isolation block (220) is arranged above the T-shaped hole (224), and the air guide hole (216) can be connected to the T-shaped hole (224) through the inner cavity of the isolation box (218).

2. The filter rod detection and rejection device according to claim 1, characterized in that: The negative pressure adsorption mechanism (3) comprises a negative pressure fan (301), a solenoid valve (302) and a connecting pipe (303); the negative pressure fan (301) is arranged on the workbench (1); one end of the connecting pipe (303) is connected to the negative pressure fan (301); the other end of the connecting pipe (303) is connected to the mounting member (101) via a pagoda head; the solenoid valve (302) is arranged on the connecting pipe (303), and a pressure relief valve (304) is provided on the connecting pipe (303).

3. The filter rod detection and rejection device according to claim 2, characterized in that: A baffle (226) is provided on the outer wall of the isolation box (218), and the baffle (226) is arranged to extend downward, and the baffle (226) blocks a portion of the negative pressure window near the top. When the isolation plate (222) is reset, the isolation plate (222) abuts against the baffle (226).

4. The filter rod detection and rejection device according to claim 3, characterized in that: A reset groove (305) is provided on the side wall of the connecting sleeve (203), and a reset spring (306) is provided in the reset groove (305). The top end of the reset spring (306) is connected to the isolation block (220), and the bottom end of the reset spring (306) is connected to the bottom of the reset groove (305). In the initial state, the reset spring (306) is in a natural state.

5. The filter rod detection and rejection device according to claim 4, characterized in that: The timing mechanism (6) includes a code disk (603) and a proximity switch (602), the code disk (603) is connected to the first motor (204), so that the code disk (603) and the drive shaft (201) rotate simultaneously, an L-plate (601) is provided on the workbench (1), the L-plate (601) is provided on one side of the code disk (603), the proximity switch (602) is provided on the L-plate (601), and the proximity switch (602) is arranged toward the code disk (603), and the proximity switch (602) is provided. 02) is connected to the control box (7), when the gear on the code disk (603) passes the proximity switch (602), the proximity switch (602) will output a pulse to the control box (7), when the filter rod is judged to be unqualified, the control box (7) records the number of pulses at this time, the control box (7) can record the number of pulses in real time, and calculate the difference between the real-time number of pulses and the number of pulses recorded when the detection is unqualified, and the control box (7) is preset with the corresponding number of pulses of the detection trough (212) from the detection station to the rejection station.

6. A filter rod detection and rejection method, using the filter rod detection and rejection device according to claim 5 for detection, characterized in that: include: a. Build a filter rod detection and removal device and conduct an operation test to ensure that the filter rod can be normally adsorbed on the detection roller (2); b. After the filter rod detection and rejection device operates normally, the image acquisition station of the visual detection mechanism (5) and the rejection station of the positive pressure rejection mechanism (4) are determined, and the number of pulses emitted by the timing mechanism (6) when the same detection trough (212) moves between the two stations is obtained; c. When the filter rod passes the image acquisition position, the visual detection mechanism (5) is triggered to acquire the image, and the control box (7) records the number of pulses at this moment; d. The filter rod is moved from the image acquisition position to the rejection position, and the difference between the number of real-time pulses and the number of pulses recorded in step c is calculated; e. When the difference in the number of pulses calculated in step d is equal to a preset fixed value, the control box (7) controls the high-speed rejection valve (402) to be energized, and the filter rod is rejected.

Images