Filter stick detecting and removing device and method

Abstract

The invention provides a filter stick detecting and removing device and method. A workbench is provided with an installation part, a detection roller is arranged on the installation part, a plurality of detection material grooves are evenly formed in the circumferential direction of the detection roller, a negative pressure adsorption mechanism is arranged on the workbench, the output end of the negative pressure adsorption mechanism is communicated with the detection material grooves, and a positive pressure removing mechanism is arranged on the workbench. The visual detection mechanism is arranged at one end of the detection roller, the timing mechanism is connected with the detection roller, and the control box is electrically connected with the positive pressure removing mechanism, the visual detection mechanism and the timing mechanism. According to the invention, through the arrangement of the detection roller and the negative pressure adsorption mechanism, a to-be-detected material can be fixed on the detection roller and sequentially passes through the visual detection mechanism along with the rotation of the detection roller, so that the detection of the visual detection mechanism is facilitated; according to the filter stick detecting and removing device, the positions of unqualified filter sticks can be recorded in real time, when the unqualified filter sticks reach the removing station, the unqualified filter sticks are removed immediately, and the production efficiency is greatly improved.

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 acquire images of objects to be inspected, processes and analyzes them through software, and performs corresponding operations and judgments based on pre-set programs.

[0003] Machine vision technology has the characteristics of fast detection speed, high accuracy, and objective and reliable detection results. With the appropriate detection algorithm, it can quickly and accurately detect surface defects of products. It is one of the most promising detection methods in intelligent manufacturing. In recent years, with the advancement of semiconductor technology, computer technology and image processing algorithms, the efficiency of machine vision detection has been significantly improved.

[0004] Nowadays, visual inspection systems have been widely used in cigarette manufacturers, such as small box appearance detectors, carton appearance detectors, inner frame paper and aluminum foil appearance detectors, and cigarette appearance detectors. However, for the online detection of filter rod core line deviation, especially to achieve the high-speed sorting requirement of 4,200 sticks / minute, there is still a certain gap, and online fixed-point rejection cannot be achieved. Summary of the invention

[0005] The object of the present invention is to provide a filter rod detection and rejection device, so as to perform fixed-point rejection on filter rods that fail the detection, thereby greatly improving the 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 piece is provided on the top of the workbench; the detection roller is rotatably arranged on the mounting piece, and a plurality of detection troughs are evenly arranged along the circumference of the detection roller, and a loading station and a unloading station are arranged on both sides of the detection roller, 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 trough; the filter rod that passes the detection 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 troughs, and the negative pressure adsorption mechanism is used to drive the detection trough to be in a negative pressure state so as to fix the filter rod in the detection 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 troughs can be connected with the positive pressure in turn due to the rotation of the detection roller. The output end of the rejection mechanism is turned on, and the positive pressure rejection mechanism is used to drive the detection trough connected with it to be in a positive pressure state, so as to reject the filter rod in the detection trough; the visual inspection mechanism is arranged at one end of the detection roller, and the visual inspection mechanism is used to detect whether the filter rod on the detection roller is 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 arranged 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, and 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 with 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 piece is box-shaped, a mounting through-hole is provided on the mounting piece, and the power output end of the negative pressure adsorption mechanism is connected to the inner cavity of the mounting piece; the detection roller comprises a driving shaft, a detection sleeve, a connecting sleeve, a first motor, a reducer and a first belt, the driving shaft is rotatably arranged in the mounting through-hole, the first motor is arranged on one side of the mounting piece, 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 driving shaft, a first sealing ring sheet is provided on the driving shaft, mounting grooves are provided at both ends of the mounting through-hole, the first sealing ring sheet abuts against the mounting piece, and the first sealing ring sheet is arranged in one of the mounting grooves, and the diameter of the mounting groove is the same as the diameter of the first sealing ring sheet; a second A sealing ring sheet, wherein the second sealing ring sheet is arranged in the other mounting groove, and the second sealing ring sheet abuts against the mounting piece, the diameter of the mounting through hole is larger than the inner diameter of the second sealing ring sheet, and the inner diameter of the second sealing ring sheet is larger than the diameter of the driving shaft, a supporting hole is arranged at the other end of the connecting sleeve, the driving shaft is rotatably arranged in the supporting hole, and the side wall of the driving shaft abuts against the supporting hole, and an air groove is arranged 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 driving shaft through a connecting piece, so that the detection sleeve can rotate with the rotation of the driving shaft, and an air guide cavity is arranged between the detection sleeve and the connecting sleeve, the detection material trough is arranged 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 a 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 member 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 a 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 connected to 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 a 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 no longer connected; when the positive pressure rejection mechanism is opened, the negative pressure air hole and the air guide cavity are no longer connected, and the negative pressure air hole and the air guide cavity are no longer connected.

[0011] In one possible implementation, the isolation assembly includes an isolation box, a plurality of 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, the bottom of the isolation box is fixed to the connecting sleeve, the isolation box covers the top of the air guide hole and the bottom of the negative pressure hole, a negative pressure window is provided on the side wall of the isolation box, an isolation plate is rotatably provided in the negative pressure window, the isolation tubes correspond to the negative pressure holes one by one, one end of the isolation tubes is fixed to the inner wall of the detection sleeve and communicates with the corresponding negative pressure hole, the other end of the isolation tubes is provided with an isolation section, the isolation section 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 arranged 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 connect the air guide cavity with the interior of the isolation box due to rotation; the isolation block can reset the isolation plate by 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 a possible implementation, a baffle is provided on the outer wall of the isolation box, the baffle is extended downward, and the baffle partially blocks the negative pressure window near the top, and when the isolation plate is reset, the isolation plate abuts against the baffle.

[0013] In a 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, 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 a 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 in cooperation, 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 the detection of 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 rod reaches the rejection position, 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 the filter rod, comprising: a. Build a filter rod detection and rejection device and conduct an operation test to ensure that the filter rod can be normally adsorbed on the detection roller; b. After the filter rod detection and rejection device operates normally, determine the image acquisition station of the visual detection 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; c. When the filter rod passes through 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; d. Calculate the difference between the number of real-time pulses and the number of pulses recorded in step c from the image acquisition position to the rejection position of the filter rod; e. When the difference in the number of pulses calculated in step d is equal to the preset fixed value, the control box controls the high-speed rejection valve to be energized and the filter rod is rejected.

[0017] The filter rod detection and rejection method provided by the present invention detects the 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

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative labor.

[0019] 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; Figure 2 for Figure 1 A magnified view of part A; 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; Figure 4 for Figure 3 A magnified view of part B; Figure 5 A schematic diagram of the structure of a connecting sleeve provided in an embodiment of the present invention; Figure 6 A cross-sectional view of a detection roller provided in an embodiment of the present invention; Figure 7 A schematic diagram of the structure of the isolation component in the initial state provided by an embodiment of the present invention; 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; Fig. 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 to work; Fig.10 A schematic diagram of the structure of the positive pressure rejection mechanism of the isolation assembly provided by the embodiment of the present invention when the rejection is completed; Fig.11 A schematic diagram of the structure of a detection kit provided by an embodiment of the present invention; Fig.12 A schematic diagram of the structure of a sampling roller provided in an embodiment of the present invention.

[0020] Among them, the reference numerals in the figures are as follows: 1. Workbench; 2. Detection roller; 3. Negative pressure adsorption mechanism; 4. Positive pressure rejection mechanism; 5. Visual detection mechanism; 6. Timing mechanism; 7. Control box; 8. Detection roller; 101. mounting member; 102. mounting hole; 201, driving shaft; 202, detection 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, detection trough; 213, loading station; 214, unloading station; 215, air guide groove; 216, air guide hole; 217, isolation component; 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; 301, negative pressure fan; 302, solenoid valve; 303, connecting pipe; 304, pressure relief valve; 305, reset groove; 306, reset spring; 401, air pump; 402, high-speed rejection valve; 403, air guide tube; 601, L plate; 602, proximity switch; 603, code disk; 801, air hole; 802, adsorption chamber; 803, sealing plate; 804, transfer station. DETAILED DESCRIPTION

[0021] 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 in conjunction with 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 used to limit the present invention.

[0022] It should be further explained that the drawings and implementation modes 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.

[0023] When an element is referred to as being "fixed to" or "disposed on" another element, it may 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 may be directly connected to the other element or indirectly connected to the other element.

[0024] 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.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.

[0026] Embodiment 1 The filter rod detection and rejection device provided by the present invention is now described.

[0027] Please also read Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12The filter rod detection and rejection device comprises 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, wherein a mounting member 101 is provided on the top of the workbench 1, 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 arranged 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 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 be in 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 arranged 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 thereto to be in a positive pressure state so as 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 detection station of the visual inspection mechanism 5 to the time taken to connect with 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.

[0028] The beneficial effect of the filter rod detection and rejection device provided in the present embodiment is as follows: compared with the prior art, the filter rod detection and rejection device provided in the present embodiment cooperates by setting a detection roller 2 and a 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 by the visual detection mechanism 5. At the same time, by setting a timing mechanism 6, a positive pressure rejection mechanism 4 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 rod reaches the rejection position, it is immediately rejected, thereby greatly improving production efficiency.

[0029] 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 driving shaft 201, a detection sleeve 202, a connecting sleeve 203, a first motor 204, a reducer 227 and a first belt 205. The driving 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 driving shaft 201. A first sealing ring piece 206 is provided on the driving 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 arranged in one of the mounting grooves. 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 arranged in another mounting groove, and the first sealing ring piece 206 is provided in the first belt 205. The second sealing ring piece 207 is in contact with the mounting member 101, and the diameter of the mounting hole is larger than the inner diameter of the second sealing ring piece 207, and the inner diameter of the second sealing ring piece 207 is larger than the diameter of the driving shaft. A supporting hole is provided at the other end of the connecting sleeve 203, and the driving shaft 201 is rotatably arranged in the supporting hole, and the side wall of the driving shaft 201 is in contact with the supporting hole. An air groove 208 is provided on the side wall of the connecting sleeve 203, and 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 driving shaft 201 through a connecting piece 209, so that the detection sleeve 202 can rotate with the rotation of the driving shaft 201, and 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 a plurality of negative pressure air holes 211.

[0030] During the operation of the device, the negative pressure adsorption mechanism 3 continuously extracts the air in the mounting member 101 to maintain the low vacuum state in 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 hole 211, the negative pressure cavity, the air passage groove 208 and the internal space of the connecting sleeve 203, so that the detection trough 212 is in a negative pressure state, and the filter rod can be adsorbed in the detection trough 212.

[0031] Specifically, the negative pressure adsorption mechanism 3 includes 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, and the other end of the connecting pipe 303 is connected to the mounting member 101 through a pagoda head. The solenoid valve 302 is arranged on the connecting pipe 303, and a pressure relief valve 304 is arranged on the connecting pipe 303. The above arrangement is simple in structure and easy to use, and each component is an easily accessible component, which is convenient for the promotion and application of the filter rod detection and rejection device of the present invention.

[0032] 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. The connecting sleeve 203 is provided with an air guide groove 215. The air guide groove 215 extends along the axial direction of the connecting sleeve 203. An air guide hole 216 is connected to the air guide groove 215. 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.

[0033] The rejection of unqualified filter sticks from the rejection station depends on the high-speed rejection valve 402. The air inlet of the high-speed rejection valve 402 is connected to the air pump 401 or the air compressor, and the air outlet is connected to the air guide groove 215 of the connecting sleeve 203. When the unqualified filter stick reaches the rejection position, the control box 7 sends a signal to control the high-speed rejection valve 402 to open, and the positive pressure is set to be greater than the negative pressure, and the filter stick is blown off and rejected.

[0034] As a preferred technical solution, an isolation component 217 is provided on the connecting sleeve 203, and the isolation component 217 is directly opposite to 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 is disconnected from the air guide cavity 216. When the positive pressure rejection mechanism 4 is opened, the negative pressure air hole 211 is disconnected from the air guide cavity 210, and the negative pressure air hole 211 is disconnected from the air guide cavity 210. The setting of the isolation component 217 prevents the negative pressure adsorption mechanism 3 and the positive pressure rejection mechanism 4 from interfering with each other.

[0035] 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 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 to the negative pressure air holes 211 one by one. The isolation tubes 219 are connected to the negative pressure air holes 211. One end of 9 is fixed on the inner wall of the detection sleeve 202 and communicated with the corresponding negative pressure air hole 211, and the other end of the isolation tube 219 is provided with an isolation section 223, and the isolation section 223 blocks the isolation tube 219. A T-shaped hole 224 is provided on the isolation section 223, and the inner cavity of the isolation tube 219 is communicated with 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, and a plurality of first through holes 225 are provided on the isolation block 220, and the first through holes 225 correspond to the isolation tube 219 one by one, and the isolation section 223 is inserted into the corresponding first through hole 225.

[0036] In the initial state, the isolation block 220 is arranged below the T-shaped hole 224, and the isolation block 220 is arranged below the isolation plate 222, and the isolation plate 222 blocks the negative pressure window 221. When the negative pressure adsorption mechanism 3 starts to work, the isolation plate 222 will be pushed by the air and rotate, and the isolation plate 222 can make the air guide cavity 210 communicate with the inside of the isolation box 218 due to the rotation, and 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 reset the isolation plate 222 by sliding up, thereby releasing the conduction between the air guide cavity 210 and the inside 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 with the T-shaped hole 224 through the inner cavity of the isolation box 218, and the air can be sprayed from the negative pressure air hole 211 into the detection trough 212, and the filter rod is blown off by the positive pressure air.

[0037] As a preferred technical solution, 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 partially blocks the negative pressure window near the top, and when the isolation plate 222 is reset, the isolation plate 222 abuts against the baffle 226. The setting of the baffle 226 enables the isolation plate 222 to only rotate inward at the upper end when rotating, so as to facilitate the isolation block 220 to force the isolation plate 222 to reset when moving upward.

[0038] In addition, 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. The setting of the reset spring 306 facilitates the isolation block 220 to reset when the positive pressure rejection mechanism 4 stops working. At this time, the isolation plate 222 can rotate again, so that the detection trough 212 of the rejection station is in a negative pressure state.

[0039] 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, and the control box 7 is preset with the corresponding pulse number of the detection trough 212 from the detection station to the rejection station.

[0040] Since the positions of the detection station and the rejection station are fixed. Therefore, the number of pulses (assuming C) that pass through the detection trough 212 when it moves from the detection station to the rejection station is also fixed. Starting from the detection of the filter rod image and judging it as unqualified, the control box 7 will record in real time the difference between the number of pulses that pass through the detection trough 212 where the unqualified filter rod is located and the number of pulses at the detection station (assuming D). Obviously, D is an integer that gradually increases from 0. When C is equal to D, it means that the filter rod has reached the rejection position.

[0041] The device uses a 12-tooth code disk 603, the number of teeth of the rejection hub and the sampling hub are both 32, and the reduction ratio of the reducer 227 is 8. The code disk 603 is installed on the other end shaft of the first motor 204. For each rotation of the first motor 204, the proximity switch 602 will output 12 pulses; when the motor rotates 8 times, a total of 96 pulses are output, and the number of these pulses is recorded by the high-speed counter in the control box 7.

[0042] One rotation of the drive shaft 201 corresponds to 32 filter rods. Therefore, this study is set to trigger the visual inspection mechanism 5 to take a photo and detect once every 3 pulses output by the proximity switch 602, and record the current reading of the high-speed counter (assuming it is m). When the filter rod moves on the wheel hub, the real-time reading of the high-speed counter is recorded (assuming it is n). The detection station is 13 teeth away from the rejection position, that is, 39 pulses. When the difference between m and n is 39 (the actual set value is slightly less than 39), it means that the filter rod has reached the rejection position, and 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 rod.

[0043] The high-speed rejection valve 402 used in this article is MAC 45A-BC1-DEFJ-1JM. According to the product manual, when the voltage is 24V, the response time of the solenoid valve 302 is 6ms when powered on and 2ms when powered off, and the maximum speed is 14,000 times / minute. The detection speed required by the present invention is 4,200 filter rods / minute, the detection time of each filter rod is about 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 rejection valve 402 meets this requirement.

[0044] 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, and the air hole 801 is arranged toward the detection roller 2. The two ends of the air hole 801 are provided with sealing plates 803, and 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 received below 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 are 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.

[0045] When the filter rod detection and rejection device of the present invention is in operation, the pulse distributor arranged in the control box 7 divides the control signal into two paths, and the two first motors 204 are synchronously controlled by two stepper motor controllers, thereby ensuring the accurate docking of the detection trough 212 of the detection roller 2 and the sampling trough of the sampling roller 8, and ensuring that the filter rod can be smoothly transferred. The start and stop, speed and direction of the first motor 204 are adjusted by the stepper motor controller on the control box 7.

[0046] Embodiment 2 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, determine the image acquisition station of the visual inspection mechanism 5 and the rejection station of the positive pressure rejection mechanism 4, and obtain the number of pulses emitted by the timing mechanism 6 when the same detection material trough 212 moves between the two stations, c. When the filter rod passes through the image acquisition position, the visual inspection 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, calculate the difference between the real-time pulse number and the pulse number recorded in step c. 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.

[0047] The filter rod detection and rejection method provided by the present invention detects the filter rods by using the filter rod detection and rejection device, and rejects unqualified filter rods at fixed points, thereby greatly improving production efficiency.

[0048] 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.

[0049] The difference in the number of pulses between the filter rod detection station and the rejection station is determined by the pulse trigger frequency collected by the set visual detection mechanism 5 and the number of detection troughs 212 between the detection station and the rejection station. The present invention sets 3 pulses to trigger a shooting detection, and the detection station and the rejection station are separated by 13 hub teeth, so the difference in the number of pulses between the detection station and the rejection station is 39.

[0050] The triggering visual detection mechanism 5 of step c takes pictures. The triggering mode is external triggering of the camera. It is triggered by the rising edge of Line1. The signal transmitting source is the proximity switch 602. A signal is sent to Line every 3 pulses. And the control box 7 of step c records the number of pulses of the position. This is realized by the high-speed counter HSC1 function in the PLC in the control box 7. The proximity switch 602 is connected to the PLC input terminal. Every time the proximity switch 602 sends a pulse, the HSC1 number increases by one.

[0051] 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 protection scope 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); 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 arranged 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); and filter rods that pass the detection enter the unloading station (214); A negative pressure adsorption mechanism (3) is disposed on the workbench (1), the output end of the negative pressure adsorption mechanism (3) being in communication with each of the detection material slots (212), and the negative pressure adsorption mechanism (3) being used to drive the detection material slots to a negative pressure state so as to fix the filter stick in the detection material slot (212); A positive pressure rejection mechanism (4) is arranged on the workbench (1); an output end of the positive pressure rejection mechanism (4) is arranged 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 be in 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 arranged at one end of the inspection roller (2), the visual inspection mechanism being used to inspect whether the filter rod on the inspection roller (2) is qualified or not, and 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) is arranged on the workbench (1). 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) is 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. After the preset time has passed, the positive pressure rejection mechanism (4) is turned off.

2. The filter rod detection and rejection device according to claim 1, characterized in that: The mounting member (101) is box-shaped, a mounting through hole (102) is provided on the mounting member (101), and 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 connection sleeve (203), a first motor (204), a reducer (227) and a first belt (205); the drive shaft (201) is rotatably disposed in the mounting hole (102); the first motor (204) is disposed on one side of the mounting member (101); the reducer (227) is connected to a 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), 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 arranged 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), the second sealing ring piece (207) is arranged in the other mounting groove, and the second sealing ring piece (207) is provided in the other mounting groove. The ring piece (207) is in contact with the mounting member (101); the diameter of the mounting through 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; a support hole is provided at the other end of the connecting sleeve (203); the drive shaft (201) is rotatably disposed in the support hole; the side wall of the drive shaft (201) is in contact with the support hole; and a gas groove (208) is provided on the side wall of the connecting sleeve (203); the detection sleeve (202) is cylindrical, and the detection sleeve ( The detection sleeve (202) is sleeved on the outer side 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 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) via a plurality of negative pressure air holes (211).

3. The filter rod detection and rejection device according to claim 2, 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).

4. The filter rod detection and rejection device according to claim 3, characterized in that: 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). The connecting sleeve (203) is provided with an air guide groove (215). 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), and the other end of the air guide pipe (403) is connected to the air guide groove (215). The air guide pipe (403) is provided with a high-speed rejection valve (402). The high-speed rejection valve (402) is electrically connected to the control box (7).

5. The filter rod detection and rejection device according to claim 4, characterized in that: 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.

6. The filter rod detection and rejection device according to claim 5, characterized in that: The isolation assembly (217) comprises 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 with openings; 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 connection 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); and a negative pressure air hole (211) is provided on the side wall of the isolation box (218). A negative pressure window (221) is provided with an isolation plate (222) rotatably disposed inside the negative pressure window (221), the isolation tube (219) corresponds to the negative pressure pores (211) one by one, one end of the isolation tube (219) is fixed to the inner wall of the detection sleeve (202) and is in communication with the corresponding negative pressure pores (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), the isolation section (223) is provided with a T-shaped hole (224), the isolation The inner cavity of the 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 arranged on the isolation block (220); 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 holes (225); in the initial state, the isolation block (220) is arranged below the T-shaped hole (224), and the isolation block (2 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) to 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).

7. The filter rod detection and rejection device according to claim 6, characterized in that: A baffle (226) is provided on the outer wall of the isolation box (218), the baffle (226) is arranged to extend downward, and the baffle (226) partially blocks the negative pressure window near the top, and when the isolation plate (222) is reset, the isolation plate (222) abuts against the baffle (226).

8. The filter rod detection and rejection device according to claim 7, characterized in that: A reset groove (305) is provided on the side wall of the connecting sleeve (203), 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), the bottom end of the reset spring (306) is connected to the bottom of the reset groove (305), and in the initial state, the reset spring (306) is in a natural state.

9. The filter rod detection and rejection device according to claim 8, characterized in that: The timing mechanism (6) comprises 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); 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) outputs 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 unqualified filter rod is detected. 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.

10. A filter rod detection and rejection method, using the filter rod detection and rejection device according to claim 9 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 through 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. Calculate the difference between the number of real-time pulses and the number of pulses recorded in step c from the image acquisition position to the rejection position of the filter rod; e. When the pulse number difference calculated in step d is equal to the preset fixed value, the control box (7) controls the high-speed rejection valve (402) to be energized, and the filter rod is rejected.

Images