A device for detecting the amount of waste on-line cigarette making machine

Abstract

The invention discloses an online detection device for the amount of waste of a cigarette making machine, which belongs to the technical field of tobacco processing and production. The detection device includes a waste weight detection module, a rolled cigarette tobacco weight detection module, a stem removal weight detection module and a human-computer interaction display module. The invention solves the problem that the amount of waste of a cigarette making machine cannot be accurately detected online. By online detection of the weight of tobacco waste, the weight of rolled cigarette tobacco and the weight of stem removal, accurate detection of the amount of waste can be achieved online. The invention can not only calculate the amount of waste at a fixed production speed, but also sample the waste and stem of the same brand of tobacco at different vehicle speeds, establish the correlation between the weight of waste and stem and vehicle speed, and perform mathematical modeling to realize the detection and calculation of the amount of waste at any vehicle speed. For the same brand and the same batch of tobacco, only the density of tobacco waste and the weight of stem per unit time need to be calibrated once, which is convenient to use and has a high degree of automation.

Description

Technical Field

[0001] The invention belongs to the technical field of tobacco processing and production, and in particular relates to an online waste amount detection device for a cigarette making machine. Background Art

[0002] In the cigarette production process, the amount of wire waste in the cigarette rolling machine is an important parameter of the rolling process, which has a significant impact on the appearance, weight, and draw resistance of the cigarettes. The amount of wire waste has a strong negative correlation with the weight deviation and loose end rejection rate of the cigarettes, and its data deviation becomes an important factor affecting the processing quality.

[0003] During the process of tobacco suction and forming of the cigarette making machine, the suction belt absorbs the tobacco by negative pressure and sends it to the rolling device through the flue. Since the tobacco return cut by the leveling disk is basically output by the auxiliary return belt, the tobacco consumption of the cigarette making machine per unit time mainly consists of three parts: the weight of tobacco used for cigarette rolling, the weight of tobacco return cut by the leveling disk and the weight of stems removed.

[0004] At present, the detection of the amount of tobacco waste in cigarette making machines mainly relies on manual start-up metering tests. In a certain period of time, appropriate amounts of tobacco are added to the outlet of the cigarette rolling gun and the outlet of the reduced waste and weighed. The sum of the weights of the tobacco added to the outlet of the cigarette rolling gun and the outlet of the reduced waste is the total mass of the tobacco supplied and consumed. The amount of waste is calculated to determine whether the amount of waste meets the process requirements. Each test is time-consuming and labor-intensive, and consumes a lot of energy. Because the tobacco is not wrapped in the cigarette gun, the tobacco and tobacco will fly around, resulting in inaccurate collection of rolled tobacco. In addition, the fixed leveling plate in the manual start-up test is inconsistent with the state of the leveling plate being adjusted up and down in actual production. At the same time, the weight of the stems removed during the test period is not taken into account, resulting in a difference between the amount of waste calculated in the test and the amount of waste in the actual production process. Some cigarette factories have also made some improvements on the test and calculation methods of the waste amount, and have also added additional conveying and weighing devices for waste detection, but the detection device and method that can truly realize the accurate calculation of the amount of waste online without manual intervention has not been reported. Therefore, there is an urgent need for an online cigarette machine waste amount detection device to solve these problems. Summary of the invention

[0005] In view of the above technical problems existing in the prior art, the present invention proposes an online cigarette waste amount detection device for a cigarette making machine, which has a reasonable design, overcomes the shortcomings of the prior art, and has good effects.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] An online waste detection device for a cigarette making machine comprises a waste weight detection module, a rolled cigarette shred weight detection module, a stem shred rejection weight detection module and a human-computer interaction display module; wherein:

[0008] The waste weight detection module is configured to obtain the volume of tobacco accumulated in the auxiliary waste belt or the blanking vibration groove of the cigarette making machine, and then calculate the waste weight according to the previously obtained tobacco density;

[0009] The rolled tobacco weight detection module is configured to obtain communication information, obtain the average production speed of the unit and the average deviation from the single target weight through CAN communication or Profibus communication protocol, correct the single target weight with the average deviation from the single target weight, and then subtract the average weight of the cigarette paper and the overlap glue of a single cigarette under the current brand material measured in advance to calculate the weight of the single rolled tobacco, and then multiply it by the average production speed of the unit and the test time to obtain the weight of the rolled tobacco in the test time period;

[0010] The stem removal weight detection module is installed at the secondary wind-selected stem collection port and is configured to collect and weight-detect the stems after secondary wind selection. The stem sampling is realized by the action of the baffle, and the action of the baffle is realized by the operation of the motor. When testing, the motor drives the baffle to move the wind-selected stems into the measuring channel. After sampling, the weighing module in the stem removal weight detection module is used to weigh the stems. When the test is completed, the motor drives the baffle to restore the original state so that the stems fall directly into the collection channel. At the same time, the weighing module in the stem removal weight detection module sends the tobacco back to the collection channel.

[0011] The human-machine interactive display module is configured to set parameters and display the results of wire waste calculation, and uses an integrated touch industrial control screen.

[0012] Preferably, the wire waste weight detection module includes a detection head and a controller;

[0013] The detection head is configured to obtain height profile information of the tobacco return wire on the auxiliary return wire or the blanking vibration trough;

[0014] The controller is configured to convert the detection signal of the detection head into a test result, and at the same time complete the parameter configuration of the detection head and communicate with the human-computer interaction display module.

[0015] Preferably, the detection head of the wire return weight detection module is installed above the auxiliary wire return belt or the blanking vibration groove, and the detection head uses a linear laser ranging sensor.

[0016] Preferably, the calculation formula for the amount of waste wire is:

[0017]

[0018] Where: W 回丝 W is the weight of the tobacco shreds after being cut by the leveling disc during the test period. 卷制 W is the weight of tobacco consumed in rolling cigarettes within the test time. 梗丝It is the weight of the shredded stems collected after the second air separation within the test time.

[0019] Preferably, W 卷制 The calculation formula is as follows:

[0020] W 卷制 =(W 单支目标重量 +W 与单支目标重量平均偏差 -W 单烟支卷烟纸和搭口胶平均重量 )*ν 平均车速 *t 测试 ;

[0021] Where: ν 平均车速 is the average production speed of the unit, in pieces / minute; t 测试 It's time for testing.

[0022] Preferably, W 单烟支卷烟纸和搭口胶平均重量 The calculation method is as follows:

[0023] Pick up a number of fallen short cigarettes without a tip at the sampling port, blow away the tobacco with compressed air, and then weigh the remaining empty cigarette tubes to obtain the average weight of the cigarette paper and center line glue of a single cigarette.

[0024] Preferably, at a fixed unit production speed, W 回丝 The calculation method is as follows:

[0025] The calculation formula for the cross-sectional area S of tobacco waste at a certain moment is:

[0026]

[0027] Where: Δx is the distance between laser points, n is the number of line laser points, h n is the height measured by the nth laser point;

[0028] The formula for calculating the volume of tobacco return within the test time is:

[0029]

[0030] Where: V is the volume of tobacco return within the test time; f is the sampling frequency of the line laser sensor; S(t) is the cross-sectional area of ​​the tobacco return sampled at the tth time; v is the return transmission speed; t is the test period of the line laser ranging sensor;

[0031] The calculation formula for the weight of tobacco waste after being cut by the leveling disc during the test time is as follows:

[0032] W 回丝 =ρV

[0033] Where: W 回丝 is the weight of tobacco waste after being cut by the leveling disc during the test time; ρ is the average density of tobacco waste;

[0034] The calculation method of the average density ρ of tobacco waste is as follows:

[0035] The average density of tobacco waste is calculated by taking samples from the waste conveyor multiple times and placing them in a container of fixed volume. The waste tobacco is weighed multiple times and calibrated once for the same brand and batch.

[0036] Preferably, at a fixed unit production speed, W 梗丝 The calculation method is as follows:

[0037] After multiple sampling tests, the weight of the silk stems per unit time is calculated, and then multiplied by the test time of the silk return amount to calculate the weight of the silk stems during the test time.

[0038] Preferably, the rolled cigarette tobacco weight detection module comprises a calculation unit and a communication unit, the communication unit is installed in the calculation unit, and the calculation unit is connected to the human-computer interaction display module through a line;

[0039] The calculation unit completes the main control calculation of the entire detection device. On the one hand, it obtains the relevant data of the cigarette machine weight control system through the communication unit. On the other hand, it controls the rotation of the motor of the stem removal weight detection module to drive the baffle to complete the stem sampling and obtain the sampled stem weighing value, and completes the relevant calculations at the same time.

[0040] Preferably, the computing unit of the rolled cigarette tobacco weight detection module is a small fanless integrated industrial computer, and the communication unit is a board that supports relevant communication protocols.

[0041] Beneficial technical effects brought by the present invention:

[0042] 1. The present invention solves the problem that the amount of tobacco waste in cigarette making machines cannot be accurately detected online. By online detecting the weight of tobacco waste, the weight of tobacco waste in rolled cigarettes and the weight of stem rejection, accurate online detection of the amount of tobacco waste can be achieved.

[0043] 2. The present invention can not only realize the calculation of the amount of waste at a fixed production speed, but also can sample the waste and stems of the same brand of tobacco at different vehicle speeds, establish the correlation between the weight of waste and stems and vehicle speed, and perform mathematical modeling to realize the detection and calculation of the amount of waste at any vehicle speed.

[0044] 3. For the same batch of tobacco of the same brand, the tobacco return density and the weight of stems per unit time only need to be calibrated once, which is easy to use and highly automated. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 The present invention is a schematic structural diagram of an online cigarette waste amount detection device for a cigarette making machine according to an embodiment of the present invention. DETAILED DESCRIPTION

[0046] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0047] like Figure 1 As shown, an online tobacco waste amount detection device for a cigarette making machine of the present invention mainly comprises a tobacco waste weight detection module, a tobacco weight detection module for rolled cigarettes, a tobacco stem removal weight detection module and a human-machine interactive display module. During the tobacco suction forming process of the cigarette making machine, the tobacco suction belt absorbs the tobacco by negative pressure and sends the tobacco to the rolling device through the flue. Since the tobacco waste cut by the leveling disk is basically output by the auxiliary tobacco waste belt, the tobacco consumption of the cigarette making machine per unit time mainly consists of three parts: the weight of tobacco used for cigarette making, the weight of tobacco waste cut by the leveling disk and the weight of tobacco stem removal.

[0048] The calculation formula of the amount of waste wire is:

[0049]

[0050] Where: W 回丝 W is the weight of the tobacco shreds after being cut by the leveling disc. 卷制 The weight of tobacco consumed in rolling cigarettes.

[0051] W 梗丝 It is the weight of the shredded stems collected after the second air separation.

[0052] Among them, the wire return weight detection module is composed of a detection head and a controller. The detection head can use a high-precision line laser distance measurement sensor, which is installed above the auxiliary wire return belt or the blanking vibration trough to obtain the accumulated volume of tobacco in the auxiliary wire return belt or the blanking vibration trough of the cigarette making machine. Samples are taken from the wire return conveyor for many times and placed in a container of fixed volume. After multiple weighings, the average density of the wire return can be calculated. The same brand and the same batch of tobacco only need to be calibrated once to calculate the wire return weight:

[0053] At a fixed production speed, the calculation method of the waste weight of the waste weight detection module is as follows: the line laser sensor is composed of several point lasers, and the height measured is a collection of many points. The calculation formula for the cross-sectional area S of the tobacco waste at a certain moment is:

[0054]

[0055] Where: Δx is the distance between laser points, n is the number of line laser points, h n is the height measured by the nth laser point.

[0056] The formula for calculating the volume of tobacco return per unit time is:

[0057]

[0058] Where: V is the volume of tobacco waste per unit time; f is the sampling frequency of the line laser sensor; S(t) is the cross-sectional area of ​​the tobacco bundle sampled at the tth time; v is the transmission speed of the waste.

[0059] The calculation formula for the weight of tobacco waste after being cut by the leveling disc during the test time is:

[0060] W 回丝 =ρV

[0061] Where: W 回丝 is the weight of tobacco waste after being cut by the leveling disk during the test time; ρ is the average density of tobacco waste.

[0062] The rolled tobacco weight detection module is mainly composed of a communication unit and a calculation unit. The calculation unit is a small fanless integrated industrial computer, and the communication unit is a board that supports relevant communication protocols. The communication unit is installed in the calculation unit, and the average production speed of the rolling and connecting unit and the average deviation from the single target weight are acquired through CAN communication or Profibus communication protocol monitoring. When the accuracy and linearity detection of the microwave density detector and the slope calibration of the weight control system are performed, the single target weight is corrected with the average deviation from the single target weight, and then the average weight of the cigarette paper and the overlap glue of a single cigarette under the current brand material measured in advance is subtracted to calculate the weight of a single rolled tobacco, and then multiplied by the average production speed of the unit and the test time to obtain the weight of the rolled tobacco in the test time period:

[0063] W 卷制 =(W 单支目标重量 +W 与单支目标重量平均偏差 -W 单烟支卷烟纸和搭口胶平均重量 )*ν 平均车速 *t 测试 .

[0064] Where: ν 平均车速 is the average production speed of the unit, in pieces / minute; t 测试 It's time for testing.

[0065] When calculating the average weight of the cigarette paper and lap glue of a single cigarette, there is no need to take special samples. You only need to pick up a certain number of fallen short cigarettes without a mouthpiece at the sampling port, use compressed air to blow away the tobacco, and then weigh the remaining empty cigarette tubes to obtain the average weight of the cigarette paper and lap glue of a single cigarette.

[0066] The stem removal weight detection module obtains the stem collection and weight detection after the second air selection, and realizes the stem sampling through the baffle action, and the baffle action is realized by the operation of the motor; after sampling, the specially designed sampling module can be used to realize automatic weighing within the test time, and the weighed tobacco can be sent back to the stem collection channel. Under the fixed unit production speed, after multiple sampling tests, the weight of the stem per unit time can be calculated, and then multiplied by the test time of the returned tobacco amount to calculate the weight of the stem within the test time.

[0067] The calculation unit of the rolled cigarette tobacco weight detection module is a small fanless integrated industrial computer that completes the main control calculations of the entire detection device. On the one hand, it uses the communication protocol board installed inside to monitor the production speed of the rolling unit and the deviation from the target weight uploaded by the unit weight control system. On the other hand, it controls the rotation of the motor of the stem removal weight detection module to drive the baffle to complete the stem sampling and obtain the sampled stem weighing value, and completes the relevant calculations at the same time.

[0068] The production speed of the unit was set at 5000 to 7000 cigarettes / min in steps of 500 cigarettes. The waste and stem tobacco of the same brand were sampled, and the correlation between the waste weight and stem tobacco and the machine speed was established. Mathematical modeling was performed to realize the detection and calculation of the waste amount at any machine speed.

[0069] In summary, the present invention provides an online wire waste amount detection device for a cigarette making machine, which solves the problem that the wire waste amount of a cigarette making machine cannot be accurately detected online, and can realize accurate online detection of the wire waste amount by online detection of the weight of tobacco waste, the weight of tobacco for rolled cigarettes and the weight of removed stems; not only can the wire waste amount calculation under a fixed production speed be realized, but also the correlation between the wire waste weight and the stem weight and the vehicle speed can be established by sampling the wire waste and stems of the same brand of tobacco at different vehicle speeds, and mathematical modeling can be performed to realize the detection and calculation of the wire waste amount under any vehicle speed; the same brand and the same batch of tobacco only need to calibrate the tobacco wire waste density and the stem weight per unit time once, and it is easy to use and has a high degree of automation.

[0070] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. An online cigarette waste amount detection device for a cigarette making machine, characterized in that: It includes a waste tobacco weight detection module, a rolled cigarette tobacco weight detection module, a stem removal weight detection module and a human-computer interaction display module; wherein, The waste weight detection module is configured to obtain the volume of tobacco accumulated in the auxiliary waste belt or the blanking vibration groove of the cigarette making machine, and then calculate the waste weight according to the previously obtained tobacco density; The rolled tobacco weight detection module is configured to obtain communication information, obtain the average production speed of the unit and the average deviation from the single target weight through CAN communication or Profibus communication protocol, correct the single target weight with the average deviation from the single target weight, and then subtract the average weight of the cigarette paper and the overlap glue of a single cigarette under the current brand material measured in advance to calculate the weight of the single rolled tobacco, and then multiply it by the average production speed of the unit and the test time to obtain the weight of the rolled tobacco in the test time period; The stem removal weight detection module is installed at the secondary wind-selected stem collection port and is configured to collect and weight-detect the stems after secondary wind selection. The stem sampling is realized by the action of the baffle, and the action of the baffle is realized by the operation of the motor. When testing, the motor drives the baffle to move the wind-selected stems into the measuring channel. After sampling, the weighing module in the stem removal weight detection module is used to weigh the stems. When the test is completed, the motor drives the baffle to restore the original state so that the stems fall directly into the collection channel. At the same time, the weighing module in the stem removal weight detection module sends the tobacco back to the collection channel. The human-machine interactive display module is configured to set parameters and display the results of wire waste calculation, and uses an integrated touch industrial control screen.

2. The on-line detection device for the amount of waste in a cigarette making machine according to claim 1, characterized in that: The wire waste weight detection module includes a detection head and a controller; The detection head is configured to obtain height profile information of the tobacco return wire on the auxiliary return wire or the blanking vibration trough; The controller is configured to convert the detection signal of the detection head into a test result, and at the same time complete the parameter configuration of the detection head and communicate with the human-computer interaction display module.

3. The on-line detection device for the amount of waste in a cigarette making machine according to claim 1, characterized in that: The detection head of the wire return weight detection module is installed above the auxiliary wire return belt or the blanking vibration trough, and the detection head uses a linear laser ranging sensor.

4. The on-line detection device for the amount of waste in a cigarette making machine according to claim 1, characterized in that: The calculation formula of the amount of waste wire is: Where: W 回丝 W is the weight of the tobacco shreds after being cut by the leveling disc during the test period. 卷制 W is the weight of tobacco consumed in rolling cigarettes within the test time. 梗丝 It is the weight of the shredded stems collected after the second air separation within the test time.

5. The on-line detection device for the amount of waste in a cigarette making machine according to claim 4, characterized in that: W 卷制 The calculation formula is as follows: W 卷制 =(W 单支目标重量 +W 与单支目标重量平均偏差 -W 单烟支卷烟纸和 Overlapping glue 平均重量 )*ν 平均车速 *t 测试 ; Where: 平均车速 is the average production speed of the unit, in pieces / minute; t 测试 It's time for testing.

6. The on-line detection device for the amount of waste in a cigarette making machine according to claim 5, characterized in that: W 单烟支卷烟纸和搭口胶平均重量 The calculation method is as follows: Pick up a number of fallen short cigarettes without a tip at the sampling port, blow away the tobacco with compressed air, and then weigh the remaining empty cigarette tubes to obtain the average weight of the cigarette paper and center line glue of a single cigarette.

7. The on-line detection device for the amount of waste in a cigarette making machine according to claim 4, characterized in that: At a fixed unit production speed, W 回丝 The calculation method is as follows: The calculation formula for the cross-sectional area S of tobacco waste at a certain moment is: Where: Δx is the distance between laser points, n is the number of line laser points, h n is the height measured by the nth laser point; The formula for calculating the volume of tobacco return within the test time is: Where: V is the volume of tobacco return within the test time; f is the sampling frequency of the line laser sensor; S(t) is the cross-sectional area of ​​the tobacco return sampled at the tth time; v is the return transmission speed; t is the test period of the line laser ranging sensor; The calculation formula for the weight of tobacco waste after being cut by the leveling disc during the test time is as follows: W 回丝 =ρV Where: W 回丝 is the weight of tobacco waste after being cut by the leveling disc during the test time; ρ is the average density of tobacco waste; The calculation method of the average density ρ of tobacco waste is as follows: The average density of tobacco waste is calculated by taking samples from the waste conveyor multiple times and placing them in a container of fixed volume. The waste tobacco is weighed multiple times and calibrated once for the same brand and batch.

8. The on-line cigarette waste amount detection device of claim 4, characterized in that: At a fixed unit production speed, W 梗丝 The calculation method is as follows: After multiple sampling tests, the weight of the silk stems per unit time is calculated, and then multiplied by the test time of the silk return amount to calculate the weight of the silk stems during the test time.

9. The on-line cigarette waste amount detection device for a cigarette making machine according to claim 1, characterized in that: The rolled cigarette tobacco weight detection module includes a calculation unit and a communication unit, the communication unit is installed in the calculation unit, and the calculation unit is connected to the human-computer interaction display module through a line; The calculation unit completes the main control calculation of the entire detection device. On the one hand, it obtains the relevant data of the cigarette machine weight control system through the communication unit. On the other hand, it controls the rotation of the motor of the stem removal weight detection module to drive the baffle to complete the stem sampling and obtain the sampled stem weighing value, and completes the relevant calculations at the same time.

10. The on-line cigarette waste amount detection device of claim 9, characterized in that: The computing unit of the rolled cigarette tobacco weight detection module is a small fanless integrated industrial computer, and the communication unit is a board that supports relevant communication protocols.

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