A device for preventing light path from being blocked and a detection module for a cigarette production line

Abstract

A device for preventing an optical path from being blocked and a detection module for a cigarette production line. The device includes a dust collector and a light-transmitting plate that is sealed and connected to the dust collector and through which the light path can pass; the dust collector has a front side surface and a back side surface that are opposite, and a peripheral side surface that is connected between the front side surface and the back side surface; the light-transmitting plate is fixed to the back side surface of the dust collector; an air inlet hole for connecting to an external air supply device is provided on the peripheral side surface of the dust collector; an air guide channel that is connected to the air inlet hole is provided on the back side surface of the dust collector, and is used to guide the gas flowing in from the air inlet hole to the light-transmitting plate; an air outlet hole that passes through the front side surface and the back side surface is provided in the middle of the dust collector, and the air outlet hole is connected to the air guide channel for gas to be discharged from the dust collector. The device can automatically and timely clean up obstructions on the detection optical path to ensure that the detection optical path is unobstructed, effectively avoid the generation of erroneous detection signals, and reduce manpower consumption.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco production, and in particular to a device for preventing an optical path from being blocked and a detection module for a cigarette production line. Background Art

[0002] Detection components are usually installed on the cigarette wire production line, including induction switches, photoelectric tubes, etc., to realize automatic control of the equipment, display the operation status of the equipment, prompt equipment failure alarm and other automation functions.

[0003] In tobacco production equipment, photoelectric tubes are widely used as an important detection element, such as empty and full signal detection of storage cabinets, high and low level detection of limit tubes, material detection at the material outlet of equipment, etc. Photoelectric tubes detect material signals through transparent plates installed in these equipment parts. The detection signal of the photoelectric tube directly participates in the start and stop of its upstream or downstream equipment.

[0004] However, due to the high moisture and smoke content of tobacco leaves and cut tobacco in the silk production line, tobacco leaves, cut tobacco and smoke are easily stuck on the inner side of the transparent plate, generating erroneous detection signals. In order to ensure that the photoelectric tube can work normally, it is often necessary to manually clean up the abnormal obstructions on the inner side of the transparent plate in a timely manner, which increases the workload of the operator. When abnormal obstruction occurs, if the operator fails to discover it in time, it will cause production to stop or flow interruption or an erroneous equipment state, affecting the continuous production.

[0005] At present, the industry mainly uses compressed air to directly spray the inside of the transparent plate. The spraying area is limited, the effect is poor, and the compressed air pipe or nozzle on the inside is easy to hang tobacco leaves and tobacco. If the pipe or the inside of the nozzle is damaged, the tobacco leaves and tobacco on the top are easy to mix into the tobacco leaves and tobacco, causing foreign matter to be mixed into the tobacco products. Alternatively, a scraper structure is used. The scraper material is aged, and it is also easy to mix materials into the tobacco leaves and tobacco, causing foreign matter to be mixed into the tobacco products. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a device for preventing the light path from being blocked, which can automatically and timely clear the obstructions on the detection light path to ensure that the detection light path is unobstructed, effectively avoid the generation of erroneous detection signals, and reduce manpower consumption.

[0007] Another technical problem to be solved by the present invention is to provide a detection module for a cigarette production line. By adopting the detection module, during the production process, obstructions such as tobacco leaves, tobacco shreds or smoke dust stuck to the inner side of the light-transmitting plate can be cleaned in time to prevent the photoelectric tube from being abnormally blocked and generating erroneous detection signals.

[0008] In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is to provide a device to prevent the light path from being blocked, the device comprising a dust collector and a light-transmitting plate sealed and connected to the dust collector and through which the light path can pass; the dust collector has opposite front side and back side surfaces, and a peripheral side surface connected between the front side surface and the back side surface; the light-transmitting plate is fixed to the back side surface of the dust collector; an air inlet hole for connecting to an external air supply device is provided on the peripheral side surface of the dust collector; an air guide channel connected to the air inlet hole is provided on the back side surface of the dust collector, for guiding the gas flowing in from the air inlet hole to the light-transmitting plate; an air outlet hole penetrating the front side surface and the back side surface is provided in the middle part of the dust collector, and the air outlet hole is connected to the air guide channel for gas to be discharged from the dust collector.

[0009] As an improvement of the device for preventing the light path from being blocked according to the present invention, the device also includes a sealing gasket arranged between the dust collector and the light-transmitting plate, the sealing gasket is respectively sealed and connected to the dust collector and the light-transmitting plate, and a through hole corresponding to the air outlet of the dust collector is provided in the middle of the sealing gasket.

[0010] As an improvement of the device for preventing the light path from being blocked according to the present invention, the air outlet is in the shape of a truncated cone, and the inner diameter of the air outlet gradually decreases along the direction from the front side surface toward the back side surface.

[0011] As an improvement of the device for preventing the light path from being blocked according to the present invention, the air guide channel includes an annular groove and an air blowing groove formed on the back side of the dust collector; the annular groove surrounds the air outlet; the air blowing groove has an air inlet groove connected to the annular groove and an air outlet groove connected to the air outlet.

[0012] As an improvement to the device for preventing the light path from being blocked according to the present invention, the plane where the bottom wall of the air blowing groove is located has an angle with the plane where the back side surface of the dust collector is located, and the distance between the bottom wall of the air blowing groove and the back side surface of the dust collector gradually decreases along the direction from the air inlet groove to the air outlet groove.

[0013] As an improvement of the device for preventing the light path from being blocked according to the present invention, the width of the annular groove is the same as the aperture of the air inlet hole.

[0014] As an improvement of the device for preventing the light path from being blocked according to the present invention, the air guide channel includes a plurality of the air blowing grooves arranged at equal intervals around the air outlet.

[0015] As an improvement of the device for preventing the light path from being blocked in the present invention, the direction of the air blowing slot from one end of the air inlet slot to one end of the air outlet slot has an angle with the radial direction of the air outlet hole.

[0016] In order to solve the other technical problem mentioned above, the technical solution adopted by the present invention is to provide a detection module for a cigarette production line, wherein the detection module includes a photoelectric tube and a transparent glass for isolating the photoelectric tube from the material to be detected. At the same time, the detection module also includes the device for preventing the light path from being blocked as described above, and the dust collector of the device is fixed on the side of the transparent glass facing the photoelectric tube, and the transparent glass is provided with an air vent whose aperture matches the air outlet, and the air vent is aligned with the air outlet.

[0017] As an improvement of the detection module of the present invention, the air outlet of the device is in the shape of a truncated cone, and the inner diameter of the air outlet gradually decreases along the front side toward the back side; the aperture of the air vent on the transparent glass is consistent with the maximum aperture of the air outlet.

[0018] The following beneficial effects can be achieved by implementing the device for preventing light path from being blocked and the detection module for cigarette production line provided by the present invention:

[0019] 1. After the device for preventing the light path from being blocked is connected to the external air supply device through the air inlet, the blocking objects on the side of the light-transmitting plate facing the dust collector can be automatically and timely cleaned, thereby ensuring that the detection light path is unobstructed and effectively avoiding the generation of erroneous detection signals. The cleaning of the blocking objects does not need to be done by the operator, which reduces manpower consumption.

[0020] 2. By adopting the detection module for the cigarette production line, during the production process, tobacco leaves, tobacco shreds, smoke dust and other obstructions adhering to the inner side of the light-transmitting plate can be cleaned up in time to prevent the photoelectric tube from being abnormally blocked and generating erroneous detection signals. Secondly, the cleaning of obstructions does not require manual implementation by operators, reducing labor consumption and the probability of other foreign objects entering the production line. In addition, the device for cleaning obstructions in the detection module is installed on the side of the transparent glass away from the material to be tested, further reducing the possibility of foreign objects being mixed into tobacco leaves, tobacco shreds, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of a front view of the back side of a dust collector in the device provided in the first embodiment of the present invention;

[0022] Figure 2 A cross-sectional view of a dust collector in the device provided in Embodiment 1 of the present invention;

[0023] Figure 3 A schematic front view of a sealing gasket in the device provided in Embodiment 1 of the present invention;

[0024] Figure 4 A cross-sectional view of a sealing gasket in a device provided in Embodiment 1 of the present invention;

[0025] Figure 5 A front view of a light-transmitting plate in the device provided in Embodiment 1 of the present invention;

[0026] Figure 6 A cross-sectional view of a light-transmitting plate in a device provided in Embodiment 1 of the present invention;

[0027] Figure 7 This is a cross-sectional view of the device provided in the first embodiment of the present invention, in which the stainless steel pan head bolts are omitted;

[0028] Figure 8 This is a reference diagram of the use status of the device provided in the first embodiment of the present invention, in which the stainless steel pan head bolts and stainless steel countersunk bolts are omitted.

[0029] Description of the accompanying drawings in the specific implementation manner:

[0030] dust collector 1 Gasket 2 Translucent board 3 Front side 114 Dorsal side 111 Side 113 Air Inlet 11 Vent 14 Annular groove 12 Blowing slot 13 Air intake notch 131 Air outlet slot 132 Inner wall 141 First mounting hole 112 Second mounting through hole 22 Third mounting hole 32 Through hole 23 bottom wall 133 Clear glass 4 Positioning hole 42 Ventilation holes 41 DETAILED DESCRIPTION

[0031] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Embodiment 1

[0033] This embodiment provides a device for preventing a light path from being blocked.

[0034] It should be noted that the device designed in this embodiment is mainly to solve the problem that in the existing cigarette manufacturing silk production line, many devices are equipped with photoelectric tubes for material condition detection, but after a period of use, the photoelectric tubes will be blocked by the materials, causing the photoelectric tubes to send abnormal or erroneous signals affecting the normal operation of the production line.

[0035] See also Figure 7The device includes a dust collector 1 and a light-transmitting plate 3 sealed and connected to the dust collector 1 and through which a light path can pass; the dust collector 1 has a front side surface 114 and a back side surface 111 opposite to each other, and a peripheral side surface 113 connected between the front side surface 114 and the back side surface 111; the light-transmitting plate 3 is fixed to the back side surface 111 of the dust collector 1; an air inlet 11 for connecting to an external air supply device is provided on the peripheral side surface 113 of the dust collector 1; the back side surface 111 of the dust collector 1 is provided with an air guide channel connected to the air inlet 11, which is used to guide the gas flowing in from the air inlet 11 to the light-transmitting plate 3; the middle part of the dust collector 1 is provided with an air outlet 14 that passes through the front side surface 114 and the back side surface 111, and the air outlet 14 is connected to the air guide channel for gas to be discharged from the dust collector 1.

[0036] In this embodiment, see Figure 1 and Figure 2 The dust collector 1 is a flat circular plate-like structure made of stainless steel. The front side 114 and the back side 111 of the dust collector 1 are both circular, and the peripheral side 113 is a cylindrical surface. The air inlet 11 is circular and extends inward from the peripheral side 113; the central axis of the air outlet 14 is coaxial with the central axis of the dust collector 1 and is arranged at the center of the dust collector 1; the air outlet 14 is connected to the air inlet 11 through the air guide passage.

[0037] Specifically, the air guide channel includes an annular groove 12 and an air blowing groove 13 formed on the back side 111 of the dust collector 1; the annular groove 12 surrounds the air outlet; the air blowing groove 13 has an air inlet groove 131 connected to the annular groove 12 and an air outlet groove 132 connected to the air outlet 14; the groove width of the annular groove 12 is the same as the aperture of the air inlet 11. Obviously, the gas entering from the air inlet 11 flows through the annular groove 12 and the blowing groove in sequence and is discharged from the air outlet. In this way, the annular groove 12 serves as a compressed air storage cavity, and the compressed air input from the air inlet 11 is stored in the air storage cavity, and then the compressed air is blown out by the air blowing groove 13.

[0038] Specifically, the plane where the bottom wall 133 of the blowing groove 13 is located has an angle with the plane where the back side surface 111 of the dust collector 1 is located, and the distance between the bottom wall 133 of the blowing groove 13 and the back side surface 111 of the dust collector 1 gradually decreases along the direction from the air inlet slot 131 to the air outlet slot 132. In this way, the blowing groove 13 can guide the airflow to the light-transmitting plate 3, ensuring that the gas entering from the air inlet 11 can be sprayed toward the light-transmitting plate 3 to blow away the sticky substances on the light-transmitting plate 3. Secondly, the bottom wall 133 of the blowing groove 13 is tilted in this way, so that the blowing groove 13 is similar to a trumpet, and the gas enters from the large mouth and exits from the small mouth, so that the gas flow rate blown out from the air outlet slot 132 of the blowing groove 13 is further improved, thereby strengthening the cleaning force of the airflow on the light-transmitting plate 3.

[0039] Specifically, the dust collector 1 further has four first mounting through holes 112 arranged around the air outlet 14 .

[0040] In this embodiment, see Figure 5 and Figure 6 The light-transmitting plate 3 is similar to the dust collector 1, and is also a flat circular plate structure, made of transparent organic glass material for the transmission of photoelectric tube light signals. The outer diameter of the light-transmitting plate 3 is consistent with the outer diameter of the dust collector 1, and it has four third mounting through holes 32 arranged around the central axis of the light-transmitting plate 3. The aperture of the third mounting through hole 32 is consistent with the aperture of the first mounting through hole 112.

[0041] In this embodiment, the light-transmitting plate 3 and the dust collector 1 are connected as a whole by four stainless steel pan head bolts. The four stainless steel pan head bolts respectively pass through the four third mounting through holes 32 of the light-transmitting plate 3 and the four first mounting through holes 112 of the dust collector 1 in sequence, so that the light-transmitting plate 3 and the dust collector 1 are combined together.

[0042] The device after being assembled needs to be installed on the original transparent glass 4 on the corresponding device of the photoelectric tube for use. During the installation process, it is necessary to punch holes on the original transparent glass 4: 4 positioning holes 42 with the same aperture as the first mounting through hole 112, the fixing hole is in the shape of a truncated cone; 1 ventilation hole 41 with the same aperture as the air outlet 14. Then, 4 stainless steel countersunk bolts with matching diameters are selected, and the 4 stainless steel countersunk bolts are respectively passed through the 4 positioning holes 42 of the original transparent glass 4 and then screwed into the 4 first mounting through holes 112 of the dust collector 1, so as to fix the entire device to the original transparent glass 4, and it is required to ensure that the ventilation hole 41 is aligned with the air outlet 14 (see Figure 8 ). Finally, adjust the light column of the photoelectric tube to be consistent with the center line of the air outlet 14 of the device.

[0043] After the device is installed and fixed, a compressed air pipe is connected to the air inlet 11 to provide an air source (i.e., an external air supply device), and a two-way solenoid valve is used to control the on and off of the air source. The two-way solenoid valve is connected to the output point of the digital output module, and the output of the digital output module signal is controlled by writing a PLC program, thereby controlling the on and off of the two-way solenoid valve. In this way, when foreign matter is stuck to the light-transmitting plate 3 of the device for a certain period of time, the device can automatically perform cleaning and blowing until the obstruction is blown away, ensuring that the photoelectric tube light signal can be transmitted normally.

[0044] In summary, after the device for preventing the light path from being blocked is connected to the external air supply device through the air inlet 11, the blocking objects on the side of the light-transmitting plate 3 facing the dust collector 1 can be automatically and timely cleaned, thereby ensuring that the detection light path is unobstructed and effectively avoiding the generation of erroneous detection signals. And the cleaning of the blocking objects does not need to be done by the operator barehanded, which reduces manpower consumption.

[0045] Furthermore, the air outlet 14 is in the shape of a truncated cone, and the inner diameter of the air outlet 14 gradually decreases along the direction from the front side 114 to the back side 111. When the device is installed on the original transparent glass 4 on the device corresponding to the photoelectric tube, the aperture of the air outlet 14 on the side facing the material to be tested is larger, that is, the inner wall 141 of the air outlet 14 is tilted downward toward the side of the material to be tested, which is conducive to preventing smoke from accumulating on the inner wall 141 of the air outlet 14, and at the same time, it is conducive to blowing out the airflow carrying tobacco leaves and smoke.

[0046] For further information, see Figure 3 and Figure 4 , the device also includes a sealing gasket 2 arranged between the dust collector 1 and the light-transmitting plate 3, the sealing gasket 2 is sealed and connected to the dust collector 1 and the light-transmitting plate 3 respectively, and a through hole 23 corresponding to the air outlet 14 of the dust collector 1 is provided in the middle of the sealing gasket 2. Specifically, the aperture of the through hole 23 is consistent with the minimum aperture of the air outlet 14. The sealing gasket 2 is also provided with four second mounting through holes 22 surrounding the through hole 23, and the aperture of the second mounting through holes 22 is consistent with the aperture of the first mounting through hole 112. During the installation process, the four stainless steel pan head bolts are respectively passed through the four third mounting through holes 32 of the light-transmitting plate 3, the four second mounting through holes 22 of the sealing gasket 2 and the four first mounting through holes 112 of the dust collector 1 in sequence, so that the light-transmitting plate 3, the sealing gasket 2 and the dust collector 1 are combined together.

[0047] Further, the air guide channel includes a plurality of the blowing slots 13 arranged at equal intervals around the air outlet, and the direction of the blowing slots 13 pointing from one end of the air inlet slot 131 to one end of the air outlet slot 132 has an angle with the radial direction of the air outlet hole 14. Specifically, the number of the blowing slots 13 is 8, so that the airflow blown out of the 8 blowing slots 13 forms a cyclone on the surface of the light-transmitting plate 3, which is conducive to the airflow cleaning the entire windward surface of the light-transmitting plate 3.

[0048] Compared with the prior art, the device provided by this embodiment can achieve the following advantages:

[0049] 1. Tobacco leaves, tobacco shreds, smoke dust and other obstructions on the light-transmitting plate 3 can be cleaned in time to prevent the photoelectric tube from being abnormally blocked, avoid generating erroneous detection signals, and ensure continuous production.

[0050] 2. Automatic blowing can be achieved through program control, without manual cleaning, reducing the workload of operators.

[0051] 3. The device has a simple structure, reliable installation and fixation, convenient and effective use, and each component is made of common materials with low cost.

[0052] 4. The device is installed in such a way that it can prevent its components from being mixed into tobacco leaves and shredded tobacco, and prevent foreign matter from being mixed into tobacco products.

[0053] Embodiment 2

[0054] This embodiment provides a detection module for a cigarette production line.

[0055] The detection module includes a photoelectric tube and a transparent glass 4 for isolating the photoelectric tube from the material to be detected. At the same time, the detection module also includes a device for preventing the light path from being blocked provided in Example 1. The dust collector 1 of the device is fixed on the side of the transparent glass 4 facing the photoelectric tube. The transparent glass 4 is provided with a vent hole 41 whose aperture matches the air outlet 14, and the vent hole 41 is aligned with the air outlet 14. The aperture of the vent hole 41 on the transparent glass 4 is consistent with the maximum aperture of the air outlet 14. The transparent glass 4 is also provided with 4 positioning holes 42 surrounding the vent hole 41 that are consistent with the aperture of the first mounting through hole 112. A compressed air pipe is connected to the air inlet 11 to provide an air source (i.e., an external air supply device), and a two-way solenoid valve is used to control the on and off of the air source. The two-way solenoid valve is connected to the output point of the digital output module, and the output of the digital output module signal is controlled by writing a PLC program, thereby controlling the on and off of the two-way solenoid valve. In this way, when foreign matter sticks to the light-transmitting plate 3 of the device for a certain period of time, the device can automatically perform cleaning and blowing until the obstruction is blown away, ensuring that the photoelectric tube light signal can be transmitted normally.

[0056] In summary, by adopting the detection module for the cigarette production line, during the production process, obstructions such as tobacco leaves, tobacco shreds or smoke dust adhering to the inner side of the light-transmitting plate 3 can be cleaned up in time to prevent the photoelectric tube from being abnormally blocked and generating erroneous detection signals. Secondly, the cleaning of obstructions does not require manual implementation by operators, reducing labor consumption and the probability of other foreign objects entering the production line. In addition, the device for cleaning obstructions of the detection module is installed on the side of the transparent glass 4 away from the material to be tested, further reducing the possibility of foreign objects being mixed into tobacco leaves, tobacco shreds, etc.

[0057] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A device for preventing a light path from being blocked, characterized in that: The device comprises a dust collector and a light-transmitting plate which is sealed and connected to the dust collector and through which a light path can pass; the dust collector has a front side surface and a back side surface which are opposite to each other, and a peripheral side surface which is connected between the front side surface and the back side surface; the light-transmitting plate is fixed to the back side surface of the dust collector; an air inlet for connecting to an external air supply device is provided on the peripheral side surface of the dust collector; an air guide channel which is connected to the air inlet hole is provided on the back side surface of the dust collector, and is used to guide the gas flowing in from the air inlet hole to the light-transmitting plate; an air outlet which passes through the front side surface and the back side surface is provided in the middle part of the dust collector, and the air outlet is connected to the air guide channel for gas to be discharged from the dust collector; the dust collector is a flat circular plate-shaped structure; The air guide channel comprises an annular groove and an air blowing groove formed on the back side of the dust collector; the annular groove surrounds the air outlet; the air blowing groove has an air inlet notch communicating with the annular groove and an air outlet notch communicating with the air outlet; The plane where the bottom wall of the blowing groove is located and the plane where the back side of the dust collector is located have an angle, and the distance between the bottom wall of the blowing groove and the back side of the dust collector gradually decreases along the direction from the air inlet slot to the air outlet slot; The air guide channel includes a plurality of blowing grooves arranged at equal intervals around the air outlet; the direction of the blowing grooves from one end of the air inlet groove to one end of the air outlet groove has an angle with the radial direction of the air outlet.

2. The device for preventing light path from being blocked according to claim 1, characterized in that: The device also includes a sealing gasket arranged between the dust collector and the light-transmitting plate, the sealing gasket is sealed and connected to the dust collector and the light-transmitting plate respectively, and a through hole corresponding to the air outlet of the dust collector is provided in the middle of the sealing gasket.

3. The device for preventing light path from being blocked according to claim 1, characterized in that: The air outlet hole is in the shape of a truncated cone, and the inner diameter of the air outlet hole gradually decreases in a direction from the front side surface toward the back side surface.

4. The device for preventing light path from being blocked according to claim 1, characterized in that: The groove width of the annular groove is the same as the aperture of the air inlet hole.

5. A detection module for a cigarette production line, comprising a photoelectric tube and a transparent glass for isolating the photoelectric tube from a material to be detected, characterized in that: The detection module also includes the device for preventing the light path from being blocked as described in claim 1, wherein the dust collector of the device is fixed on the side of the transparent glass facing the photoelectric tube, and the transparent glass is provided with an air vent whose aperture matches the air outlet, and the air vent is aligned with the air outlet.

6. The detection module according to claim 5, characterized in that: The air outlet of the device is in the shape of a truncated cone, and the inner diameter of the air outlet gradually decreases along the front side toward the back side; the aperture of the air vent on the transparent glass is consistent with the maximum aperture of the air outlet.

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