Filter stick circumference detection device

Abstract

The utility model belongs to the technical field of cigarette filter sticks, and particularly relates to a filter stick circumference detection device, a first conveying mechanism is used for linearly conveying filter sticks towards a second conveying mechanism along the axis direction of the filter sticks, a gap is arranged between the discharging end of the first conveying mechanism and the feeding end of the second conveying mechanism, and a detection mechanism comprises a plurality of optical micrometers. A plurality of optical micrometers are arranged at intervals between the discharging end of the first conveying mechanism and the feeding end of the second conveying mechanism, the optical micrometers are annularly distributed around the axis position when the filter sticks are conveyed, and the filter sticks pass through the centers of the optical micrometers when being conveyed towards the second conveying mechanism on the first conveying mechanism; the end, away from the first conveying mechanism, of the second conveying mechanism faces the distributing mechanism. In the process that the filter sticks are conveyed along the first conveying mechanism to the second conveying mechanism, the circumferential data of the filter sticks can be detected in multiple directions, and the accuracy of the detection data is effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to filter rod technical field, specifically related to a filter rod circumference detection device. BACKGROUND

[0002] Filter rod circumference size is an important index in composite filter rod production. For silica gel filter rod, most of them are formed by extrusion during production, which is prone to fluctuation in the circumference size of some filter rods, that is, some filter rods in the same batch or different batches have deviation in the circumference size from the standard size. Excessive deviation in the circumference size of filter rods will lead to quality problems such as filter core falling off and wrinkle at the joint during filter rod compounding. Therefore, the stability of the circumference size of filter rods is crucial during filter rod compounding production. SUMMARY

[0003] The utility model provides a filter rod circumference detection device which can detect the circumference data of filter rods in multiple directions during the process of conveying filter rods from conveying mechanism one to conveying mechanism two, effectively ensuring the accuracy of detection data.

[0004] The utility model discloses a conveying mechanism one, detection mechanism, conveying mechanism two and material distributing mechanism, conveying mechanism one is used for conveying filter rods linearly along the axial direction of filter rods to conveying mechanism two, and the spacing is established between the discharge end of conveying mechanism one and the feeding end of conveying mechanism two, the detection mechanism includes a plurality of optical micrometer, a plurality of optical micrometer all are towards the spacing between the discharge end of conveying mechanism one and the feeding end of conveying mechanism two and are set, and a plurality of optical micrometers are distributed around the axial position of filter rod conveying, the filter rod is conveyed to conveying mechanism two on conveying mechanism one and passes along the center of a plurality of optical micrometers, the end of conveying mechanism two away from conveying mechanism one is set towards material distributing mechanism, and the material distributing mechanism is used for screening qualified and unqualified filter rods.

[0005] Further, the number of optical micrometers is four, and the detection mechanism further includes a door-shaped mounting plate, the door-shaped mounting plate is vertically arranged, and the four optical micrometers are distributed and arranged at the four corners of the door-shaped mounting plate.

[0006] Further, the detection mechanism further includes an adjusting mounting plate, the adjusting mounting plate is provided with a waist-shaped hole arranged in a horizontal and / or vertical manner, and the lower end of the door-shaped mounting plate is provided with a mounting hole, and the door-shaped mounting plate is fixed by penetrating the mounting hole and the waist-shaped hole with a fastener.

[0007] Further, the conveying mechanism one comprises a guide plate and a linear conveying module, the guide plate is provided with a guide groove for placing and moving the filter rod, the bottom of the guide groove is throughly provided, and the width of the through area is smaller than the diameter of the filter rod, the linear conveying module is located below the guide plate, the conveying direction of the linear conveying module is the same as the length direction of the guide groove, and the moving part of the linear conveying module is provided with a pushing block, the pushing block is arranged in the guide groove along the bottom of the guide groove.

[0008] Further, the conveying mechanism one further comprises a base, the guide plate is arranged on the base, and the base is provided with a negative pressure channel one, the negative pressure channel one is arranged below the guide plate and towards the bottom of the guide groove.

[0009] Further, the conveying mechanism one further comprises a pressing plate, the pressing plate is arranged on the guide plate and above the end of the guide groove close to the conveying mechanism two, for limiting the height position of the filter rod in the guide groove when conveying to the conveying mechanism two.

[0010] Further, the conveying mechanism two comprises two wheel groups arranged in sequence from the conveying mechanism one to the distributing mechanism, each of the two wheel groups comprises two conveying wheels, the side surface of each of the conveying wheels is concave, the side surfaces of the two conveying wheels in a single wheel group form a clamping channel for the filter rod, and the rotating directions of the two conveying wheels in a single wheel group are opposite.

[0011] Further, the conveying mechanism two further comprises two guide tubes, the two wheel groups are located between the two guide tubes, the axes of the two guide tubes are on a straight line passing through the clamping channels of the two wheel groups, and the feeding end of each of the two guide tubes is trumpet-shaped.

[0012] Further, the distributing mechanism comprises a distributing cylinder, a blowing module and a stirring module, a plurality of receiving grooves one for accommodating the filter rods are circumferentially and spaced apart on the side surface of the distributing cylinder, the length direction of each of the plurality of receiving grooves one is arranged along the axial direction of the distributing cylinder, and the distributing cylinder is internally provided with a negative pressure channel two, a through hole is arranged in each of the plurality of receiving grooves one to communicate with the negative pressure channel two, the blowing module and the stirring module are located at different positions of the side surface of the distributing cylinder, the blowing module is used for blowing the unqualified filter rods out of the receiving grooves one, and the stirring module is used for stirring the qualified filter rods out of the receiving grooves one.

[0013] Further, the feeding mechanism is arranged above the conveying mechanism one, the feeding mechanism comprises a hopper and a feeding wheel transversely arranged at the bottom of the hopper, the side surface of the feeding wheel is circumferentially and spaced apart to form a plurality of receiving grooves two for accommodating the filter rods, and the length direction of each of the plurality of receiving grooves two is arranged along the axial direction of the feeding wheel.

[0014] The utility model discloses beneficial effect is, in the filter stick along the conveying mechanism one conveying mechanism two conveying process, through the annular distribution several optical micrometer in the interval position of conveying mechanism one and conveying mechanism two to the circumference data of filter stick carries out multidirectional detection, effectively guarantees the accuracy of detection data, and the cost is lower compared with the visual detection mode, and the filter stick after detection is conveyed to the material distributing mechanism through conveying mechanism two, and the material distributing mechanism carries out screening to the filter stick of the circumference size eligible and the circumference size unqualified, obtains the filter stick of the high consistency of circumference size, and it is favorable to improve the quality when the subsequent filter stick composite production. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure schematic diagram of filter stick circumference detection device of the utility model.

[0016] Figure 2 It is the structure schematic diagram of conveying mechanism one of the utility model.

[0017] Figure 3 It is the top view of conveying mechanism one of the utility model.

[0018] Figure 4 It is A-A sectional view in the utility model Figure 3 .

[0019] Figure 5 It is the structure schematic diagram of detection mechanism.

[0020] Figure 6 It is the structure schematic diagram of conveying mechanism two of the utility model.

[0021] Figure 7 It is the structure schematic diagram of material distributing mechanism.

[0022] In the drawing: 1, feeding mechanism;11, hopper;12, material wheel;2, conveying mechanism one;21, base;211, negative pressure passage one;22, guide plate;221, guide groove;23, chain wheel chain module;231, push material block;24, pressing plate;25, induction module;3, detection mechanism;31, optical micrometer;32, door type mounting plate;33, adjusting mounting plate;331, waist-shaped hole;4, conveying mechanism two;41, conveying wheel;42, guide pipe;5, material distributing mechanism;51, material distributing cylinder;511, material receiving groove one;52, material stirring module;6, collection barrel;7, conveying mechanism three;100, filter stick. DETAILED DESCRIPTION

[0023] As Figures 1-7The utility model provides a filter stick circumference detection device, including conveying mechanism one 2, detection mechanism 3, conveying mechanism two 4 and material distributing mechanism 5. Conveying mechanism one 2 is used for conveying filter stick 100 linearly along the axis direction of filter stick 100 to conveying mechanism two 4, and interval is equipped between the discharge end of conveying mechanism one 2 and the feeding end of conveying mechanism two 4. Detection mechanism 3 includes several optical micrometer 31, several optical micrometer 31 are all set to the interval between the discharge end of conveying mechanism one 2 and the feeding end of conveying mechanism two 4, and several optical micrometer 31 are distributed around the axis position of filter stick 100 when conveying, and the center of several optical micrometer 31 is passed when filter stick 100 is conveyed on conveying mechanism one 2 to conveying mechanism two 4, that is, several optical micrometer 31 are set to the same point, and the point is located in the interval between the discharge end of conveying mechanism one 2 and the feeding end of conveying mechanism two 4 and is located on the axis of filter stick 100 when conveying. The end of conveying mechanism two 4 away from conveying mechanism one 2 is set to material distributing mechanism 5, and material distributing mechanism 5 is used for screening qualified and unqualified filter stick 100.

[0024] The utility model in the process of filter stick 100 along conveying mechanism one 2 to conveying mechanism two 4 conveying, through the interval position of the ring distribution several optical micrometer 31 in conveying mechanism one 2 and conveying mechanism two 4 to the circumference data of filter stick 100 multi -directional detection, effectively guarantee the accuracy of detection data, and compared with the cost of visual detection mode is lower, and the filter stick 100 after detection is conveyed to material distributing mechanism 5 through conveying mechanism two 4, and material distributing mechanism 5 screens filter stick 100 of the circumference size eligible and the circumference size unqualified, obtains the filter stick 100 of the high consistency of circumference size, and it is favorable to improve the quality when subsequent filter stick 100 compound production.

[0025] The number of optical micrometer 31 is four, the detection mechanism 3 still includes door type mounting plate 32, the door type mounting plate 32 is set vertically, four optical micrometer 31 are distributed and set in the four corners of door type mounting plate 32, and the discharge end of conveying mechanism one 2 is arranged in door type mounting plate 32. Based on the setting of four optical micrometer 31, the circumference data can be measured on four sides of filter stick 100 respectively, to ensure that the measured data has better filter stick 100 circumference size representative and accuracy, and based on the setting of door type mounting plate 32, on the basis of meeting the installation of four optical micrometer 31, filter stick 100 can normally pass along the center point of four optical micrometer 31, and the installation of conveying mechanism one 2 can be avoided, to avoid interference.

[0026] The detection mechanism 3 further comprises an adjusting mounting plate 33 arranged on the base or frame of the circumference device of the filter rod 100, the adjusting mounting plate 33 is provided with a waist-shaped hole 331 arranged in a transverse and / or vertical manner, the lower end of the door-shaped mounting plate 32 is provided with a mounting hole, and the door-shaped mounting plate 32 is fixed by a fastener such as a bolt passing through the mounting hole and the waist-shaped hole 331 and locked by a nut after passing through the mounting hole and the waist-shaped hole 331. Based on the above arrangement, by loosening the fastener, adjusting the position of the mounting hole corresponding to the waist-shaped hole 331, the position of the door-shaped mounting plate 32 can be finely adjusted in the transverse and / or vertical direction, and the center points of the four optical micrometers 31 are as much as possible to coincide with the axis of the filter rod 100 during conveying.

[0027] The conveying mechanism one 2 comprises a guide plate 22 and a linear conveying module, the guide plate 22 is provided with a guide groove 221 for placing and moving the filter rod 100, the bottom of the guide groove 221 is throughly arranged, and the width dimension of the through area is smaller than the diameter of the filter rod 100, so that the filter rod 100 cannot fall out along the bottom of the guide groove 221, and the cross section of the guide groove 221 can be V-shaped, U-shaped or U-shaped. The linear conveying module is located below the guide plate 22, the conveying direction of the linear conveying module is the same as the length direction of the guide groove 221, and the moving part of the linear conveying module is provided with a pushing block 231, which is arranged in the guide groove 221 along the bottom of the guide groove 221. When the filter rod 100 is located on the guide groove 221, with the movement of the linear conveying module, the pushing block 231 moves along the length direction of the guide groove 221, thereby pushing the filter rod 100 orderly to move towards the conveying mechanism two 4, and based on the limiting of the filter rod 100 on both sides of the guide groove 221, the filter rod 100 can be guaranteed to be linearly conveyed to the conveying mechanism two 4.

[0028] The conveying mechanism one 2 further comprises a base 21, the guide plate 22 is arranged on the base 21, the base 21 is provided with a negative pressure channel one 211, the negative pressure channel one 211 is arranged below the guide plate 22 and towards the bottom of the guide groove 221, and the negative pressure channel one 211 is connected with an external negative pressure mechanism. Based on the above arrangement, a negative pressure can be formed at the bottom of the guide groove 221, which can facilitate the filter rod 100 output by the feeding mechanism 1 to fall into the guide groove 221 more stably, and can improve the stability of the filter rod 100 when moving in the guide groove 221, avoiding upward disengagement.

[0029] The material guide groove 221 is close to one end of the conveying mechanism two 4, that is, the discharging end of the conveying mechanism one 2. The conveying mechanism one 2 further comprises a pressing plate 24 arranged on the material guide plate 22 and above the end of the material guide groove 221 close to the conveying mechanism two 4, for limiting the height position of the filter rod 100 in the material guide groove 221 when conveying towards the conveying mechanism two 4. The side of the pressing plate 24 facing the material guide groove 221 can be a plane, or the side of the pressing plate 24 facing the material guide groove 221 is provided with a groove matching the curvature of the filter rod 100. Based on the arrangement of the pressing plate 24, the problem of the filter rod 100 being raised or upwardly displaced when moving from the end of the material guide groove 221 to the conveying mechanism two 4 can be prevented, so as to ensure that the filter rod 100 can accurately pass through the center of the four optical micrometers 31 and accurately enter the conveying mechanism two 4.

[0030] The straight conveying module is a chain wheel and chain module 23, comprising two chain wheels rotatably arranged on the base 21 and a chain sleeved on the chain wheels, and further comprising a motor arranged on one side of the base 21, the motor being in transmission connection with one of the chain wheels. The chain is the moving part of the pushing block 231, and the pushing block 231 is arranged on the chain of the chain wheel and chain module 23 and moves into the material guide groove 221 along with the movement of the chain. In the present application, the number of pushing blocks 231 is several, and the several pushing blocks 231 are arranged on the chain at intervals, and the distance between the two adjacent pushing blocks 231 on the straight section of the chain is greater than the length of the filter rod 100. The several pushing blocks 231 move along with the movement of the chain, thereby continuously pushing each filter rod 100 in the material guide groove 221 to move towards the conveying mechanism two 4.

[0031] The conveying mechanism two 4 comprises two wheel groups arranged in sequence from the conveying mechanism one 2 to the material distributing mechanism 5, and each of the two wheel groups comprises two conveying wheels 41. Figure 6 As shown in the figure, the two conveying wheels 41 in a single wheel group are arranged one above the other, that is, Figure 6The two conveying wheels 41 on the left side are one wheel group, and the two conveying wheels 41 on the right side are another wheel group. The side surfaces of the conveying wheels 41 are concave, the side surfaces of the two conveying wheels 41 in a single wheel group form a clamping channel of the filter rod 100, and the rotating directions of the two conveying wheels 41 in a single wheel group are opposite. Due to the characteristics of the material of the silica gel filter rod, compared with filter rods 100 made of other materials, the silica gel filter rod has greater friction after the surface of the silica gel filter rod contacts an object, that is, the resistance when the silica gel filter rod moves is greater. The utility model can apply a greater propulsion force to the filter rod 100 than the conveying mechanism 2 by the rotation of the conveying wheels 41 in the two wheel groups, so that the filter rod 100 can enter the material distribution mechanism 5 more stably and accurately, and the problem of the filter rod 100 being stuck due to the end of the filter rod 100 not completely entering the material distribution mechanism 5 can be avoided. Due to the simultaneous conveying of the two wheel groups, the balance of the filter rod 100 during conveying can be ensured, and the filter rod 100 can be prevented from being tilted upward or downward.

[0032] The conveying wheels 41 in the two wheel groups are rotatably arranged on corresponding supports, the two conveying wheels 41 at the same height in the two wheel groups are connected through a transmission assembly and are driven to rotate by the same motor. Figure 6 The two conveying wheels 41 above are connected through a corresponding transmission assembly and are driven to rotate by a corresponding motor, and the two conveying wheels 41 below are connected through another transmission assembly and are driven to rotate by another motor.

[0033] In one arrangement of the utility model, the conveying mechanism two 4 further comprises two material guide pipes 42, and the two wheel groups are located between the two material guide pipes 42, that is, one of the two material guide pipes 42 is located outside one side of one wheel group, and the other of the two material guide pipes 42 is located outside one side of the other wheel group. The axes of the two material guide pipes 42 are on a straight line passing through the clamping channels of the two wheel groups, and the material inlet ends of the two material guide pipes 42 are trumpet-shaped, which is more convenient for the filter rod 100 to enter the material guide pipe 42. Based on the arrangement of the two material guide pipes 42, the filter rod 100 can be guided when entering the conveying mechanism two 4 and being conveyed along the conveying mechanism two 4, and the filter rod 100 can be prevented from being tilted upward or downward. The material guide pipe 42 can be made of transparent material to facilitate manual observation.

[0034] The distributing mechanism 5 comprises a distributing cylinder 51, a blowing module and a poking module 52. The distributing cylinder 51 is provided with a plurality of receiving grooves 511 for accommodating filter rods 100 on the side surface in a circumferential direction. The length direction of the receiving grooves 511 is parallel to the axial direction of the distributing cylinder 51. The distributing cylinder 51 is internally provided with a negative pressure passage 2. The receiving grooves 511 are provided with through holes for communicating with the negative pressure passage 2. Among the two guide pipes 42, the guide pipe 42 away from the conveying mechanism 2 has an axis parallel to the axis of the distributing cylinder 51. The end of the guide pipe 42 is directed to the top of the end surface of the distributing cylinder 51. The filter rod 100 is conveyed by the conveying mechanism 2 and enters the corresponding receiving groove 511 on the top of the end surface of the distributing cylinder 51. The distributing cylinder 51 can be hollow and rotatably arranged on a mounting shaft and driven to rotate by a corresponding motor and transmission assembly. The hollow area is the negative pressure passage 2. The mounting shaft is internally provided with an air extraction passage. One end of the air extraction passage is connected with an external negative pressure mechanism, and the other end is in communication with the inside of the distributing cylinder 51, so that the receiving groove 511 area forms a negative pressure adsorption filter rod 100.

[0035] The blowing module and the poking module 52 are located at different positions on the side surface of the distributing cylinder 51. The blowing module is used for blowing the unqualified filter rod 100 from the receiving groove 511. The poking module 52 is used for poking the qualified filter rod 100 from the receiving groove 511. Specifically, the blowing module can be arranged on the mounting shaft and located inside the distributing cylinder 51, and the blowing module is arranged downward. When the unqualified filter rod 100 is rotated to the position directly below the receiving groove 511 along with the distributing cylinder 51, the blowing module blows downward to make the unqualified filter rod 100 fall off from the receiving groove 511 and fall into the waste bucket below. In other embodiments, the blowing module can also be arranged at other positions, and the filter rod 100 at the corresponding position can be blown off.

[0036] The poking module 52 is located at the rear side of the blowing module in the rotating direction of the distributing cylinder 51, so that the qualified filter rod 100 in the receiving groove 511 can be poked out and fall into the receiving groove 511. Figure 1For example, the material distribution cylinder 51 rotates counterclockwise, and the material pushing module 52 is located at the right part of the material distribution cylinder 51. In the utility model, the depth of the material receiving groove one 511 is less than the diameter of the filter rod 100, and when the filter rod 100 is located in the material receiving groove, part of the area on the side of the filter rod 100 protrudes from the side of the material distribution cylinder 51. The material pushing module 52 is specifically a material pushing fork, which is fixedly arranged on the corresponding fixing frame, the end of the material pushing fork is arranged towards the side of the material distribution cylinder 51, and there is a gap between the end of the material pushing fork and the side of the material distribution cylinder 51, and the gap is less than the height of the filter rod 100 protruding from the side of the material distribution cylinder 51. The conveying mechanism three 7 is arranged below the material pushing fork, and the conveying mechanism three 7 can be a belt conveyor or other conveying mechanism. With the rotation of the material distribution cylinder 51, the unqualified filter rod 100 is first blown off by the blowing module, and the qualified filter rod 100 is continuously rotated with the material distribution cylinder 51, and is pushed to the conveying mechanism three 7 under the action of the material pushing fork, and is conveyed to the next process link through the conveying mechanism three 7.

[0037] In the utility model, the optical micrometer 31, the blowing module and the same controller are electrically connected, and the corresponding operation and the coordination work are pre-set through the same controller. In order to further improve the accuracy of detection feedback, the conveying mechanism one 2 further includes an induction module 25, the induction module 25 is arranged at one end of the material guide plate 22 close to the conveying mechanism two 4, and is used for inducting the filter rod 100 in the material guide groove 221. The induction module 25, the optical micrometer 31 and the blowing module are electrically connected with the same controller, based on the setting, the feedback of the induction module 25 and the optical micrometer 31 can play a double insurance role, and the condition that the optical micrometer 31 is triggered by mistake due to external interference is avoided.

[0038] In one embodiment of the utility model, the induction module 25 is arranged above one end of the material guide groove 221 close to the conveying mechanism two 4 and is arranged downwards, and the induction module 25 can be an infrared sensor or other sensor. In another embodiment of the utility model, the depth of the material guide groove 221 is less than the diameter of the filter rod 100, and when the filter rod 100 is located in the material guide groove 221, part of the area on the side of the filter rod 100 is higher than the top of the material guide groove 221. In the embodiment, the induction module 25 is a reflection type sensor, the emitter is located at one side of the material guide groove 221, and the receiver is located at the other side of the material guide groove 221. When the filter rod 100 moves between the emitter and the receiver, the light beam between the emitter and the receiver is blocked by the filter rod 100.

[0039] The utility model also includes feeding mechanism 1, feeding mechanism 1 sets up above conveying mechanism one 2, is used for conveying filter rod 100 on conveying mechanism one 2. Feeding mechanism 1 includes hopper 11 and the feeding wheel 12 of lateral rotation setting at hopper 11 bottom, the lateral surface of feeding wheel 12 is peripherally spaced a plurality of receiving grooves no. 2 for accommodating filter rod 100, the length direction of a plurality of receiving grooves no. 2 is all along the axial direction of feeding wheel 12. Specifically, the both sides of hopper 11 bottom and the arc shape of feeding wheel 12 lateral surface matching arc, and hopper 11 bottom bottom end has the opening of filter rod 100 falling, and the opening is located above guide groove 221. With the rotation of feeding wheel 12, the filter rod 100 in receiving groove no. 2 is limited by the arc region of hopper 11 bottom and follows feeding wheel 12 rotation in receiving groove no. 2, when filter rod 100 rotates to hopper 11 bottom bottom end, filter rod 100 then directly falls in guide groove 221.

[0040] Those skilled in the art should understand: the discussion of the above any embodiment is only exemplary, and is not intended to imply that the protection scope of the application is limited to these examples; under the idea of the application, the above embodiment or the technical features between different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of one or more embodiments of the application as described above. In order to be brief, they are not provided in details.

[0041] One or more embodiments of the present application are intended to cover all such alternatives, modifications and variations falling within the broad scope of the present application. Therefore, any omission, modification, equivalent replacement, improvement, etc. made in the spirit and principle of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A filter rod circumference detection device, characterized in that, The system includes a conveying mechanism 1 (2), a detection mechanism (3), a conveying mechanism 2 (4), and a material distribution mechanism (5). The conveying mechanism 1 (2) is used to linearly convey the filter rod (100) towards the conveying mechanism 2 (4) along the axial direction of the filter rod (100), and there is a gap between the discharge end of the conveying mechanism 1 (2) and the feed end of the conveying mechanism 2 (4). The detection mechanism (3) includes several optical micrometers (31), and all of the optical micrometers (31) are oriented towards the discharge end of the conveying mechanism 1 (2) and the feed end of the conveying mechanism 2 (4). The feed ends of the second conveying mechanism (4) are spaced apart, and the optical micrometers (31) are circumferentially distributed around the axis of the filter rod (100) during conveying. The filter rod (100) passes through the center of the optical micrometers (31) when it is conveyed on the first conveying mechanism (2) toward the second conveying mechanism (4). The end of the second conveying mechanism (4) away from the first conveying mechanism (2) is set toward the material distribution mechanism (5). The material distribution mechanism (5) is used to screen out qualified and unqualified filter rods (100).

2. The filter rod circumference detection device as described in claim 1, characterized in that, The optical micrometers (31) are four in number, and the detection mechanism (3) also includes a gate-shaped mounting plate (32). The gate-shaped mounting plate (32) is vertically arranged, and the four optical micrometers (31) are distributed at the four corners of the gate-shaped mounting plate (32).

3. The filter rod circumference detection device as described in claim 2, characterized in that, The detection mechanism (3) also includes an adjustment mounting plate (33), which is provided with a waist-shaped hole (331) arranged horizontally and / or vertically. The lower end of the gate-shaped mounting plate (32) is provided with a mounting hole, and the gate-shaped mounting plate (32) is fixed by fasteners passing through the mounting hole and the waist-shaped hole (331).

4. The filter rod circumference detection device as described in any one of claims 1-3, characterized in that, The conveying mechanism 1 (2) includes a guide plate (22) and a linear conveying module. The guide plate (22) is provided with a guide groove (221) for placing filter rods (100) and allowing the filter rods (100) to move. The bottom of the guide groove (221) is through, and the width of the through area is smaller than the diameter of the filter rods (100). The linear conveying module is located below the guide plate (22). The conveying direction of the linear conveying module is the same as the length direction of the guide groove (221). The moving part of the linear conveying module is provided with a pusher block (231). The pusher block (231) passes through the bottom of the guide groove (221).

5. The filter rod circumference detection device as described in claim 4, characterized in that, The conveying mechanism (2) also includes a base (21), the guide plate (22) is disposed on the base (21), and a negative pressure channel (211) is disposed on the base (21), the negative pressure channel (211) is disposed below the guide plate (22) and faces the bottom of the guide trough (221).

6. The filter rod circumference detection device as described in claim 5, characterized in that, The first conveying mechanism (2) also includes a pressure plate (24), which is set on the guide plate (22) and located above the end of the guide trough (221) near the second conveying mechanism (4), and is used to limit the height position of the filter rod (100) in the guide trough (221) when it is conveyed toward the second conveying mechanism (4).

7. The filter rod circumference detection device as described in any one of claims 1-3, 5, and 6, characterized in that, The second conveying mechanism (4) includes two wheel sets arranged sequentially from the first conveying mechanism (2) to the material distribution mechanism (5). Each wheel set includes two conveying wheels (41). The sides of the conveying wheels (41) are recessed. A clamping channel for the filter rod (100) is formed between the sides of the two conveying wheels (41) in a single wheel set. The two conveying wheels (41) in a single wheel set rotate in opposite directions.

8. The filter rod circumference detection device as described in claim 7, characterized in that, The second conveying mechanism (4) further includes two guide pipes (42), the two wheel sets are located between the two guide pipes (42), the axes of the two guide pipes (42) are on a straight line passing through the clamping channel of the two wheel sets, and the feed end of the two guide pipes (42) is horn-shaped.

9. The filter rod circumference detection device according to any one of claims 1-3, 5, 6, and 8, characterized in that, The material distribution mechanism (5) includes a material distribution cylinder (51), an air blowing module, and a material pushing module (52). The side of the material distribution cylinder (51) is provided with several receiving grooves (511) for accommodating filter rods (100). The length direction of the several receiving grooves (511) is arranged along the axial direction of the material distribution cylinder (51). The material distribution cylinder (51) is provided with a negative pressure channel II. The several receiving grooves (511) are provided with through holes to communicate with the negative pressure channel II. The air blowing module and the material pushing module (52) are located at different positions on the side of the material distribution cylinder (51). The air blowing module is used to blow unqualified filter rods (100) from the receiving grooves (511), and the material pushing module (52) is used to push qualified filter rods (100) from the receiving grooves (511).

10. The filter rod circumference detection device according to any one of claims 1-3, 5, 6, and 8, characterized in that, It also includes a feeding mechanism (1), which is located above the conveying mechanism (2). The feeding mechanism (1) includes a hopper (11) and a feeding wheel (12) that is laterally rotated at the bottom of the hopper (11). The side of the feeding wheel (12) is circumferentially spaced with several receiving grooves for accommodating filter rods (100). The length direction of the several receiving grooves is arranged along the axial direction of the feeding wheel (12).

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