An automatic blockage cleaning device for the discharge port of the cut tobacco conveying belt

Abstract

The present invention discloses an automatic blockage cleaning device for the discharge outlet of a tobacco shred conveying belt, which comprises a discharge bin (1), a pneumatic blowing and cleaning nozzle (2), a driving assembly (3), a photoelectric blockage detection and alarm device (4), a controller (5), an observation flap (6), and a conveying belt (7). The downstream end of the conveying belt is arranged adjacent to the discharge bin, and a driving assembly is arranged on the outer side surface of the discharge bin. It is characterized in that: a pneumatic blowing and cleaning nozzle and a photoelectric blockage detection and alarm device are arranged at the upper end inside the discharge bin. The photoelectric blockage detection and alarm device is used for monitoring the blockage condition at the discharge bin opening, and can give an on-site alarm when blockage occurs at the discharge bin opening. The pneumatic blowing and cleaning nozzle is used for timely dredging the discharge bin opening when blockage occurs. An observation flap is arranged on the side surface of the discharge bin. The present invention can timely detect, timely handle, and timely alarm and notify when blockage occurs, avoid production process accidents caused by long-term blockage, and reduce economic losses caused by long-term blockage.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco shred production and manufacturing, and particularly relates to an automatic blockage cleaning device for the discharge port of a tobacco shred conveying belt. Background Art

[0002] In the daily production of processing tobacco shreds in a cigarette making and silk reeling workshop, the tobacco shreds are conveyed to a discharge bin by a belt and then enter a feeding bin or a subsequent conveying belt under the action of gravity for subsequent processing. Due to factors such as unstable raw material incoming, insufficient looseness, and moisture, the raw materials are often blocked at the discharge bin opening, and manual cleaning of the blockage is required. Moreover, when there is blockage, the feeding amount becomes smaller, resulting in flow fluctuations. If the blockage time is too long, the equipment may even stop, affecting the normal operation of the front and back processes. The frequent occurrence of this problem not only consumes a large amount of labor costs but also has a negative impact on the stability of the process in the daily production of tobacco shreds.

[0003] In response to the above problems, it is currently necessary to continuously inspect during the production process whether there is blockage, which wastes labor costs. When there is blockage in the daily discharge bin, workers need to use tools to dredge the discharge bin manually. During the cleaning process, not only are there safety hazards for the personnel, but also the labor intensity of the workers is increased. If the blockage time is too long and not discovered in time, it will cause flow fluctuations, shutdowns, etc., affecting the process quality of the tobacco shreds and causing serious production accidents. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an automatic blockage cleaning device for the discharge port of a tobacco shred conveying belt, which can timely detect, process, and alarm when blockage occurs, saving the inspection time of workers. When there is blockage, it will automatically start the pneumatic blowing and cleaning nozzle to clean the discharge bin and delay for a few seconds to turn off the motor of the conveying belt. Workers do not need to climb onto the discharge bin to dredge manually, reducing the labor intensity of the workers and avoiding potential safety accidents that may occur when workers clean the blockage, avoiding production process accidents caused by long-term blockage, and reducing economic losses caused by long-term blockage.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] An automatic cleaning device for blockage at the discharge opening of a tobacco conveying belt, which comprises a discharge bin (1), a pneumatic blowing and cleaning nozzle (2), a driving assembly (3), a photoelectric blockage detection alarm (4), a controller (5), an observation flap (6), and a conveying belt (7). The downstream end of the conveying belt is arranged adjacent to the discharge bin. A driving assembly is arranged on the outer side surface of the discharge bin. The driving assembly includes a motor and a transmission assembly, and the transmission assembly is connected to the rotating shaft of the conveying belt. It is characterized in that: a pneumatic blowing and cleaning nozzle and a photoelectric blockage detection alarm are arranged at the upper end inside the discharge bin. The pneumatic blowing and cleaning nozzle and the photoelectric blockage detection alarm are installed above the discharge bin near the downstream end of the conveying belt through screws. The pneumatic blowing and cleaning nozzle is arranged closer to the conveying belt than the photoelectric blockage detection alarm. The photoelectric blockage detection alarm is used to monitor the blockage situation at the discharge bin opening and can give an on-site alarm when blockage occurs at the discharge bin opening. The pneumatic blowing and cleaning nozzle is used to dredge the discharge bin opening in time when blockage occurs. An observation flap is arranged on the side surface of the discharge bin, which is arranged opposite to the conveying belt. The staff can open the observation flap according to experience after hearing the alarm sound to check the relief of the blockage situation.

[0007] Further, the controller (5) is electrically connected to the photoelectric blockage detection alarm (4), the pneumatic blowing and cleaning nozzle (2), and the driving assembly (3). It is automatically switched by the controller according to the signal of the photoelectric blockage detection alarm. When the photoelectric blockage detection alarm gives an alarm and sends a signal to the controller at the same time, the controller immediately starts the pneumatic blowing and cleaning nozzle and shuts down the motor for driving the conveying belt (7) after a delay of 3 - 5 seconds.

[0008] Further, the pneumatic blowing and cleaning nozzles (2) are distributed in an array, and their jet angles can be adjusted.

[0009] Further, the pneumatic blowing and cleaning nozzle (2) comprises an outer cylinder part (21), an inner cylinder part (22), an end cover (23), an air inlet pipe (24), a first spiral part (25), and a second spiral part (26). The inner circumference of the outer cylinder part is provided with the inner cylinder part. The upper end of the outer cylinder part is connected with the end cover. An outer side jet channel is formed between the outer cylinder part and the inner cylinder part. The inner side of the inner cylinder part forms an inner side jet channel. The outer circumference surface of the outer cylinder part is connected with the air inlet pipe. The air inlet pipe is connected to the outer side jet channel through a first channel. The first channel is approximately tangent to the outer side jet channel. The air inlet pipe is connected to the inner side jet channel through a second channel. The second channel is approximately tangent to the inner side jet channel, and the tangent direction of the second channel is opposite to the tangent direction of the first channel. The inner circumference surface of the inner side jet channel is provided with the first spiral part, and the inner circumference surface of the outer side jet channel is provided with the second spiral part. The spiral directions of the first spiral part and the second spiral part are opposite. The jet airflows of the inner side jet channel and the outer side jet channel converge at the air outlet of the pneumatic blowing and cleaning nozzle.

[0010] Furthermore, the pitch of the first helical part (25) is greater than that of the second helical part (26), which can further improve the swirling jet performance and enhance the cleaning effect.

[0011] Furthermore, the first helical part (25) and the second helical part (26) are spiral protrusion structures, and the cross-section of the protrusion structure is trapezoidal or triangular.

[0012] Through the structural design of the pneumatic blowing and cleaning nozzle, compared with the cleaning nozzle of the prior art, the present invention can improve the swirling jet performance of the air flow, thereby improving the jet force and / or jet kinetic energy of the pneumatic blowing and cleaning nozzle, and can efficiently complete the timely cleaning of the blocked material with better cleaning effect.

[0013] An automatic blocked material cleaning device for the discharge port of the cigarette tobacco conveying belt of the present invention can timely detect, handle and alarm when blocked material occurs, saving the inspection time of workers. When blocked material occurs, it will automatically start the pneumatic blowing and cleaning nozzle to clean the discharge bin and delay for a few seconds to turn off the motor of the conveying belt, without workers climbing to the top of the discharge bin for manual dredging, reducing the labor intensity of workers and avoiding potential safety accidents that may occur when workers clean the blocked material, avoiding production process accidents caused by long-term blocked material, and reducing economic losses caused by long-term blocked material. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an axonometric structural schematic diagram of the automatic blocked material cleaning device for the discharge port of the cigarette tobacco conveying belt of the present invention;

[0015] Figure 2 It is a front view structural schematic diagram of the automatic blocked material cleaning device for the discharge port of the cigarette tobacco conveying belt of the present invention;

[0016] Figure 3 It is a side view structural schematic diagram of the automatic blocked material cleaning device for the discharge port of the cigarette tobacco conveying belt of the present invention;

[0017] Figure 4 It is a structural schematic diagram of the pneumatic blowing and cleaning nozzle of the present invention.

[0018] In the figure: discharge bin 1, pneumatic blowing and cleaning nozzle 2, drive assembly 3, photoelectric blocked material detection and alarm 4, controller 5, observation flap 6, conveying belt 7, outer cylinder part 21, inner cylinder part 22, end cover 23, air inlet pipe 24, first helical part 25, second helical part 26. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] As Figures 1-4 shown, an automatic cleaning device for blockage at the discharge port of a tobacco shred conveying belt includes a discharge bin 1, a pneumatic blowing and cleaning nozzle 2, a driving assembly 3, a photoelectric blockage detection alarm 4, a controller 5, an observation flap 6, and a conveying belt 7. The downstream end of the conveying belt 7 is disposed adjacent to the discharge bin 1. A driving assembly 3 is provided on the outer side of the discharge bin 1. The driving assembly 3 includes a motor and a transmission assembly, and the transmission assembly is connected to the rotating shaft of the conveying belt 7. It is characterized in that: a pneumatic blowing and cleaning nozzle 2 and a photoelectric blockage detection alarm 4 are provided at the upper inner side of the discharge bin 1. The pneumatic blowing and cleaning nozzle 2 and the photoelectric blockage detection alarm 4 are installed above the discharge bin 1 near the downstream end of the conveying belt 7 by screws. The pneumatic blowing and cleaning nozzle 2 is disposed closer to the conveying belt 7 than the photoelectric blockage detection alarm 4. The photoelectric blockage detection alarm 4 is used to monitor the blockage situation at the discharge bin opening, and can give an on-site alarm when blockage occurs at the discharge bin opening, so that on-site staff can discover it in time. The pneumatic blowing and cleaning nozzle 2 is used to dredge the discharge bin opening in time when blockage occurs. An observation flap 6 is provided on the side of the discharge bin 1, disposed opposite to the conveying belt 7. Staff can open the observation flap 6 according to experience after hearing the alarm sound to check and relieve the blockage situation.

[0022] The controller 5 is electrically connected to the photoelectric blockage detection alarm 4, the pneumatic blowing and cleaning nozzle 2, the driving assembly 3, and the photoelectric blockage detection alarm 4. It is automatically switched by the controller 5 according to the signal of the photoelectric blockage detection alarm 4. When the photoelectric blockage detection alarm 4 alarms and sends a signal to the controller 5 at the same time, the controller 5 immediately starts the pneumatic blowing and cleaning nozzle 2 and shuts down the motor for driving the conveying belt 7 after a delay of 3 - 5 seconds.

[0023] The pneumatic blowing and cleaning nozzles 2 are distributed in an array, and their jet angles can be adjusted.

[0024] As Figure 4As shown in the figure, the pneumatic blowing and cleaning nozzle 2 includes an outer cylinder part 21, an inner cylinder part 22, an end cover 23, an air inlet pipe 24, a first spiral part 25, and a second spiral part 26. An inner cylinder part 22 is arranged on the inner circumference of the outer cylinder part 21. The upper end of the outer cylinder part 21 is connected with an end cover 23. An outer jet channel is formed between the outer cylinder part 21 and the inner cylinder part 22, and an inner jet channel is formed inside the inner cylinder part 22. The outer peripheral surface of the outer cylinder part 21 is connected with an air inlet pipe 24. The air inlet pipe 24 is connected to the outer jet channel through a first channel, and the first channel is substantially tangent to the outer jet channel. The air inlet pipe 24 is connected to the inner jet channel through a second channel, and the second channel is substantially tangent to the inner jet channel, and the tangency direction of the second channel is opposite to the tangency direction of the first channel. A first spiral part 25 is arranged on the inner peripheral surface of the inner jet channel, and a second spiral part 26 is arranged on the inner peripheral surface of the outer jet channel. The spiral directions of the first spiral part 25 and the second spiral part 26 are opposite. The jet airflows of the inner jet channel and the outer jet channel converge at the air outlet of the pneumatic blowing and cleaning nozzle 2. The spiral part can improve the swirling jet performance of the airflow, thereby improving the jet force and / or jet kinetic energy of the pneumatic blowing and cleaning nozzle 2.

[0025] Through the design of the pneumatic blowing and cleaning nozzle 2 of the present invention, specifically, the tangency direction of the second channel is opposite to the tangency direction of the first channel, and the spiral directions of the first spiral part 25 and the second spiral part 26 are opposite. Compared with the cleaning nozzle of the prior art, it can improve the swirling jet performance of the airflow, thereby improving the jet force and / or jet kinetic energy of the pneumatic blowing and cleaning nozzle 2, and can efficiently complete the timely cleaning of the blocked material, and the cleaning effect is better.

[0026] The first spiral part 25 and the second spiral part 26 are spiral protrusion structures, and the cross-section of the protrusion structure is trapezoidal or triangular. The pitch of the first spiral part 25 is greater than the pitch of the second spiral part 26, which can further improve the swirling jet performance and the cleaning effect.

[0027] In the present invention, an optoelectronic blockage detection alarm 4 is installed at the outlet of the discharge bin 1 and is linked with the control switch of the cigarette making central control room system. Once the discharge bin 1 is blocked, the pneumatic blowing and cleaning nozzle 2 automatically starts to blow and clean the blocked material in the discharge bin 1, and delays for 3 - 5 seconds to turn off the motor of the conveyor belt 7. If the blockage is solved within 3 - 5 seconds, the motor of the conveyor belt is not turned off. At the same time, the optoelectronic blockage detection alarm 4 sends a signal to the controller 5 and starts to alarm to notify the staff to check, so as to ensure the continuous and stable feeding of the feeding system, stabilize the production flow rate, improve the processing technology quality, effectively reduce the labor intensity of workers, and improve the automatic control level of the cigarette making production tobacco conveying system.

[0028] An automatic blockage cleaning device for the discharge port of a tobacco shred conveying belt according to the present invention can automatically detect whether the discharge bin is blocked, can promptly discover the blockage, can promptly clean it after the blockage is found, and will not cause production problems due to excessive blockage time. When it is found that the material feeding is not smooth, it can be manually processed in advance. The blockage cleaning device can be automatically and / or manually started both on-site and in the control system, ensuring production safety and also reducing the input of labor costs during production.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, horizontal, vertical, etc.) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a certain specific posture (as shown in the drawings). If this specific posture changes, then the directional indication also changes accordingly. The "connection" can be a direct connection or an indirect connection. The "setting", "set on", and "set in" can be directly set or indirectly set.

[0030] The above embodiments are descriptions of the present invention, not limitations of the present invention. It can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic blockage cleaning device for the discharge outlet of a cut tobacco conveying belt, which comprises a discharge bin (1), a pneumatic blowing and cleaning nozzle (2), a driving assembly (3), a photoelectric blockage detection alarm (4), a controller (5), an observation flap (6), and a conveying belt (7). The downstream end of the conveying belt is arranged adjacent to the discharge bin. A driving assembly is arranged on the outer side of the discharge bin. The driving assembly includes a motor and a transmission assembly. The transmission assembly is connected to the rotating shaft of the conveying belt. It is characterized in that: At the upper inner side of the discharge bin, there are pneumatic blowing and cleaning nozzles and photoelectric material blockage detection alarm devices. The pneumatic blowing and cleaning nozzles and photoelectric material blockage detection alarm devices are installed above the discharge bin near the downstream end of the conveyor belt by screws. The pneumatic blowing and cleaning nozzles are arranged closer to the conveyor belt than the photoelectric material blockage detection alarm devices. The photoelectric material blockage detection alarm device is used to monitor the material blockage situation at the discharge bin opening and can give an on-site alarm when material blockage occurs at the discharge bin opening. The pneumatic blowing and cleaning nozzles are used to dredge the discharge bin opening in time when material blockage occurs. An observation flap is arranged on the side of the discharge bin, which is located opposite to the conveyor belt. The staff can open the observation flap according to experience after hearing the alarm sound to check the alleviation of the material blockage situation; the controller (5) is electrically connected to the photoelectric material blockage detection alarm device (4), the pneumatic blowing and cleaning nozzles (2), and the drive assembly (3), and is automatically switched on and off by the controller according to the signal of the photoelectric material blockage detection alarm device. When the photoelectric material blockage detection alarm device gives an alarm and sends a signal to the controller at the same time, the controller immediately starts the pneumatic blowing and cleaning nozzles and shuts down the motor for driving the conveyor belt (7) after a delay of 3 - 5 seconds. The pneumatic blowing and cleaning nozzles (2) are distributed in an array of multiple units, and their jet angles can be adjusted. The pneumatic blowing and cleaning nozzles (2) include an outer cylinder part (21), an inner cylinder part (22), an end cap (23), an air inlet pipe (24), a first spiral part (25), and a second spiral part (26). The inner cylinder part is arranged on the inner periphery of the outer cylinder part. The upper end of the outer cylinder part is connected with the end cap. An outer jet channel is formed between the outer cylinder part and the inner cylinder part, and an inner jet channel is formed inside the inner cylinder part. The outer peripheral surface of the outer cylinder part is connected with the air inlet pipe. The air inlet pipe is connected to the outer jet channel through a first channel, and the first channel is approximately tangent to the outer jet channel. The air inlet pipe is connected to the inner jet channel through a second channel, and the second channel is approximately tangent to the inner jet channel, and the tangential direction of the second channel is opposite to that of the first channel. The inner peripheral surface of the inner jet channel is provided with the first spiral part, and the inner peripheral surface of the outer jet channel is provided with the second spiral part. The spiral directions of the first spiral part and the second spiral part are opposite, and the jet airflows of the inner jet channel and the outer jet channel converge at the air outlet of the pneumatic blowing and cleaning nozzle. The pitch of the first spiral part (25) is larger than that of the second spiral part (26), which can further improve the swirling jet performance and the cleaning effect.

2. The automatic blockage cleaning device for the discharge port of the tobacco conveyor belt according to claim 1, characterized in that, The first spiral part (25) and the second spiral part (26) are spiral protrusion structures, and the cross-section of the protrusion structure is trapezoidal or triangular.

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