Device for automatically detecting proportion of cut tobacco, cut tobacco and stem slivers

Abstract

A device for automatically detecting the proportion of cut tobacco and cut stem slivers comprises a feeding device and further comprises a solid-solid separation device connected with the feeding device, and the solid-solid separation device comprises a first fluidization area connected with the feeding device and a second fluidization area located below the first fluidization area. The solid-solid separation device further comprises a gap adjusting device capable of adjusting the size of a fluidization area wind field gap between the first fluidization area and the second fluidization area. A first blanking bin is arranged below the second fluidization area; a controllable three-way valve is connected above the first fluidization area through a pipeline, the other two ends of the controllable three-way valve are respectively connected with a first blanking bin and a separator of the gas-solid separation device through pipelines, a gas outlet at the top of the separator is connected with a fan, and the second blanking bin is provided with a weight measuring device. According to the utility model, the fluidization area is arranged to adjust the airflow speed, and the cut tobacco and the stem slivers are separated, so that the proportion of the cut tobacco and the stem slivers can be obtained, and the detection precision in the production process is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical technical field relates to tobacco processing equipment, concretely relates to a tobacco leaf and stem proportion automatic detection device. BACKGROUND

[0002] Tobacco process is the technology and method of processing tobacco raw materials and cigarette materials into cigarette products, and its main process, especially the processing from tobacco leaves to tobacco, can be described as follows: after the primary curing of tobacco leaves, the leaves are classified and placed in the production line to enter the leaf conditioning machine for conditioning to a certain moisture, and after the leaf separation process, the leaf blades and tobacco stems in the tobacco leaves are separated to obtain sheet tobacco and tobacco stems, which are then packed after re-drying, stored for a certain period of time, and then enter the leaf and stem processing procedures to form a tobacco sample for blending and rolling.

[0003] In the leaf separation process, the sheet tobacco and tobacco stem products inevitably contain a certain proportion of tobacco stems and leaf blades, which are carried into the next process under this condition, especially when the final tobacco product is prepared for rolling, the stems in the sheet tobacco can be converted into stem signatures mixed with leaf tobacco in the tobacco product, and the stem signatures in the tobacco can cause the risk of piercing the cigarette when it is rolled into a cigarette product. At the same time, the consumer often experiences a large suction resistance, a high tendency to fall, and even a risk of damaging clothes, furniture, and fire.

[0004] Therefore, controlling the content of stem signatures in tobacco is the key to risk prevention, and detecting the content of stem signatures in tobacco or detecting the content of tobacco in stem signatures has become the key technology for controlling and preventing risks, which has attracted widespread attention, such as the industry standard YC / T 428-2012 and the paper "Determination of the content of tobacco in stem signatures removed by a cigarette machine" published by Li Bin, and the Chinese patent CN102240069 "Instrument for measuring the content of tobacco in stem signatures removed by a cigarette machine" all involve the determination and control of stem signature content.

[0005] Currently, the main method for measuring the content of tobacco in stem signatures is through fluidization separation, which involves one-time feeding, weighing after separation, and calculation, especially when the stem signatures account for a large proportion of tobacco, which is more suitable. This method has the following defects: first, the detection equipment needs to be restarted after interruption, which requires high stability and controllability of the equipment; second, it is difficult to improve the detection efficiency, and it is not suitable for online control of industrial separation equipment; third, when the leaf tobacco accounts for a large proportion of the tobacco, the entanglement phenomenon is serious, and it is not suitable for effective separation of leaf tobacco and stem signatures through fluidization method, which increases the detection error. UTILITY MODEL CONTENT

[0006] The utility model discloses a cut tobacco leaf stem proportion automatic detection device and detection method.

[0007] The utility model discloses a cut tobacco leaf stem proportion automatic detection device, including feeding device, still including with the feeding device connection's solid solid separation device, the solid solid separation device includes with the first fluidized zone of feeding device connection, the second fluidized zone of being located first fluidized zone below and the section area less than first fluidized zone, the solid solid separation device still includes the clearance adjusting device of adjustable first fluidized zone and second fluidized zone between fluidized zone wind field clearance size, the first drop bin is arranged below the second fluidized zone.

[0008] The controllable three -way valve is connected with the first drop bin and the separator of gas -solid separation device through pipeline respectively at the other two ends of the controllable three -way valve, the gas export of the top of the separator is connected with the fan, and the solid export below is aligned with the second drop bin, and the second drop bin is provided with a weight measuring device.

[0009] Preferably, the connecting place between the first fluidized zone and the second fluidized zone is provided with a bulk material device and a frequency control device for adjusting the rotation frequency of the bulk material device, and the bulk material device is a rotatable device with multiple paddles.

[0010] Preferably, the separator is a cyclone separator.

[0011] Preferably, the cyclone separator is provided with an airlock below the solid outlet.

[0012] Preferably, the feeding device includes a hopper, a sealing device is arranged at the opening of the hopper, a feeding device is arranged at the bottom of the hopper, and the feeding device is connected with the first fluidized zone through a feeding channel.

[0013] Preferably, the controllable three -way valve is connected with the first wind pipe and the second wind pipe, and the first wind pipe and the second wind pipe are connected with the first fluidized zone and the first drop bin through the first wind pipe upstream pipe and the second wind pipe upstream pipe respectively, the diameter of the first wind pipe is greater than that of the first wind pipe upstream pipe, and the diameter of the second wind pipe is greater than that of the second wind pipe upstream pipe.

[0014] Preferably, the first fluidized zone and the second fluidized zone are provided with a gas flow rate sensor interface.

[0015] The automatic detection device for the ratio of tobacco leaves and stems described in this invention separates the leaves and stems by setting a fluidization zone to adjust the airflow speed. Maintaining continuity in the feeding and separation process ensures effective separation of leaves and stems in the tobacco, thereby obtaining their ratio and improving detection accuracy during production. Simultaneously, this invention achieves fully automatic control of operating parameters, eliminating human error and equipment instability during testing, ensuring the stability of the detection data, and significantly improving detection efficiency. Multiple measurements provide a data foundation for stable control and optimization of the process. Attached Figure Description

[0016] Fig. 1 This is a schematic diagram of a specific embodiment of the automatic detection device for the ratio of leaf filaments to stems described in this utility model;

[0017] Fig. 2 This is a flowchart illustrating a specific implementation of the automatic detection method for the ratio of leaf filaments to stems described in this utility model.

[0018] Fig. 3 This is a schematic diagram of a specific implementation of the automatic detection device for the ratio of leaf strands to stems described in this utility model in a tobacco production line.

[0019] The attached figures are labeled as follows: 1. Feeding device; 11. Hopper; 12. Sealing device; 13. Feeding device; 14. Feeding control device; 15. Discharge channel; 2. Solid-solid separation device; 21. First fluidization zone; 22. Second fluidization zone; 23. Dispersing device; 24. Frequency control device; 25. Fluidization zone air gap; 26. Gap control device; 27. Upstream pipe of the first air conveying pipe; 28. First discharge hopper; 29. ​​Upstream pipe of the second air conveying pipe; 3. Air conveying device; 31. First air conveying pipe; 32. Second air conveying pipe; 33. Downstream pipe of the second air conveying pipe; 34. Controllable three-way valve; 35. Three-way valve control device; 4. Gas-solid separation device; 4-1. Cyclone separator; 42. Airlock; 43. Second discharge hopper; 44. Upstream pipe of the fan; 5. Weight measuring device; 51. Weight sensor; 52. Data acquisition and transmission device; 61. Fan; 62. Wind speed measuring device; 7. Sample storage bin; 8. Production line sampling device. Detailed Implementation

[0020] The following is in conjunction with the appendix Figs. 1 to 3 The specific embodiments of this utility model will be further described in detail below.

[0021] The inventor found through a large number of blowing experiments on the raw material of the mixture of cut tobacco and stem after tobacco primary processing that the entrainment speed VT1 of the cut tobacco of a certain size and weight obtained according to the tobacco primary processing specification is generally in the range of 1.0 m / s-2.0 m / s, the entrainment speed VT2 of the stem contained therein is generally in the range of 2.5 m / s-4.4 m / s, the so-called entrainment speed refers to the airflow speed required for the object to move in a direction while being suspended in the airflow, it can be found that the entrainment speed of the cut tobacco is less than that of the stem, and the two entrainment speed ranges do not overlap.

[0022] The influence of the airflow speed on the object in practice is not uniform due to the object density, object granularity and airflow distribution, and thus conforms to the general probability distribution, when the flow speed is greater than the entrainment speed and the difference is greater, the proportion of the object taken away by the airflow is higher, when the flow speed is greater than but close to the entrainment speed, a small amount of objects cannot be taken away by the airflow, and when the flow speed is less than but close to the entrainment speed, a small amount of objects are still taken away by the airflow. When the airflow speed is in the entrainment speed range, the object will repeatedly settle under the action of the airflow, and each settlement will have part of the object rising and part of the object falling.

[0023] Based on the above principle, the inventor designed the cut tobacco stem ratio automatic detection device and detection method.

[0024] When working, first, the gap control device 26 sets the flow field gap 25 between the two fluidization zones to a set size, the sealing device 12 in the feeding device 1 is opened, the cut tobacco composed of the mixture of cut tobacco and stem is added to the stock bin 11, and the sealing device 12 in the feeding device 1 is closed; the three-way valve control device 35 in the air conveying device 3 controls the controllable three-way valve to be adjusted to the first air conveying pipeline 31 and the first and second air conveying pipeline downstream pipeline 33 in communication; the air blower power and the gap control device are adjusted, so that the airflow speed V1 of the first fluidization zone 21 is controlled to be between 1.5 m / s-1.8 m / s, and the airflow speed of the second fluidization zone 22 is controlled to be between 2.0 m / s-2.4 m / s.

[0025] The power of the air blower determines the airflow speed of the first fluidization zone, the suction airflow generated by the air blower is transmitted and attenuated through the pipeline, and then enters the first fluidization zone to form an airflow therein, and the power of the air blower is adjusted to obtain the required airflow speed in the first fluidization zone.

[0026] The width of the flow field gap 25 of the fluidization zone determines the airflow speed ratio of the first fluidization zone and the second fluidization zone, the airflow changes after passing through the flow field gap 25 of the fluidization zone, the wider the gap width, the smaller the airflow speed of the second fluidization zone; and the smaller the gap width, the greater the airflow speed of the first fluidization zone;

[0027] Because there is a gap smaller than the diameter of the first fluidized zone at the connection between the first and second fluidized zones, and the cross-sectional area of ​​the second fluidized zone is smaller than that of the first fluidized zone, the airflow velocity inevitably decreases after flowing from the second fluidized zone to the first fluidized zone, resulting in the airflow velocity in the first fluidized zone being lower than that in the second fluidized zone. The gap control device 26 can be an existing valve with linearly adjustable opening and closing size.

[0028] The blower 61 is connected to the gas-solid separator via the upstream pipe 44. When turned on, it draws air from the upstream pipe 44, forming an airflow direction as shown in the image. Fig. 1 As shown, this ensures that the airflow direction in the fluidization zone is from bottom to top. The wind speed can be measured by the wind speed measuring device 62 connected to the upstream duct 44 of the fan, and the wind speed can be adjusted according to the measurement data to control the airflow velocity in the fluidization zone.

[0029] First, the controllable three-way valve is adjusted to connect the upper part of the first fluidization zone to the cyclone separator via the controllable three-way valve. Then, the feeding control device 14 is activated to control the feeding device 13, providing stable feeding to the solid-solid separation device 2. The feeding device 13 is a feed valve. Tobacco enters the solid-solid separation device 2 through the discharge channel 15. The dispersing device 23 swings or rotates, providing stable feeding of raw materials temporarily stored in the hopper 11 to the first fluidization zone under a sealed condition. The downstream of the discharge channel is connected to the solid-solid separation device, and the central axis of the discharge channel forms an angle greater than 45° with the central axis of the solid-solid separation device. Preferably, the angle is between 60° and 75°.

[0030] After the mixture of stems and blades enters the first fluidization zone, the airflow velocity V1 of the stems in the first fluidization zone 21 is controlled at 1.5m / s to 1.8m / s, which is less than the carry-out velocity VT2 of the stems. As a result, the stems will randomly descend to the second fluidization zone. The airflow velocity V1 in the first fluidization zone is close to the carry-out velocity VT1 of the blades, which is within the range of the carry-out velocity of the blades. Therefore, the blades will repeatedly settle from the first fluidization zone. Each time they settle, some blades may be sucked away, but a small amount will enter the second fluidization zone.

[0031] The velocity in the first fluidization zone should not be set too high. Although setting it too high can allow more blades to be sucked away, when the airflow velocity is close to VT2, some stems will be adsorbed into the separator, leading to subsequent detection errors. Therefore, the airflow velocity in the first fluidization zone should be set within the blade exit velocity range to prevent stems from entering the separator.

[0032] The stems enter the second fluidization zone. Although the speed of the second fluidization zone is higher than that of the first fluidization zone, the airflow speed of the second fluidization zone is still less than the take-out speed of the stems. At this time, the stems will continue to slowly drop into the first drop bin 28. Even if a small amount of stems enter the first fluidization zone, they will fall back into the second fluidization zone due to the low flow rate of the first fluidization zone. However, the speed of the second fluidization zone is significantly greater than the take-out speed VT1 of the cut tobacco, so that the cut tobacco entering the second fluidization zone will rise into the first fluidization zone and be sucked away, realizing the separation of the cut tobacco and the stems in the tobacco.

[0033] At the same time, the airflow speed of the second fluidization zone is greater than the take-out speed VT1 of the cut tobacco, so that even if a small amount of cut tobacco enters the second fluidization zone under the action of gravity, it will be brought back to the first fluidization zone by the upward airflow, thereby greatly reducing the cut tobacco that drops into the first drop bin 28.

[0034] A scattering device 23 is arranged between the two fluidization zones, and the swinging or rotating frequency of the scattering device 23 can be controlled by a frequency control device 24 to adjust the feeding effect. The scattering device is a rotatable device with multiple paddles, similar to fan blades. When the raw material passes through, the paddles rotate to scatter the raw material, which separates the stems and the cut tobacco therein.

[0035] After the cut tobacco and the stems in the tobacco are separated, in the first fluidization zone, the cut tobacco will randomly rise during the fluidization process in the first fluidization zone because the airflow speed in this zone is usually slightly greater than the take-out speed of the cut tobacco. Once the cut tobacco rises to the vicinity of the first air conveying pipe upstream pipe 27, it will enter the first air conveying pipe upstream pipe 27 due to the increase in airspeed caused by the decrease in pipe diameter relative to the first fluidization zone pipe. The cut tobacco will then enter the cyclone separator 41 through the first air conveying pipe upstream pipe 27, the first air conveying pipe 31, and the second air conveying pipe downstream pipe 33. The cut tobacco will then sink to the second drop bin 43 through the air lock at the lower end of the cyclone separator 41. At this time, the cut tobacco and the stems in the tobacco are separated in position by the solid-solid separation device and the gas-solid separation device.

[0036] Fig. 1 In the specific embodiment shown, the air lock 42 at the bottom of the cyclone separator 41 is a rotary discharger. The cut tobacco falls into the second drop bin through the air lock by rotating the discharger.

[0037] In the specific embodiment shown, the first air conveying pipe diameter is less than the first air conveying pipe upstream pipe diameter, and the second air conveying pipe diameter is less than the second air conveying pipe upstream pipe diameter. This further increases the flow rate when the airflow passes through.

[0038] After the separation, the batch of raw material is completed, and the weight M1 of the cut tobacco in the second drop bin 43 at this time is recorded by the weight measuring device 5.

[0039] As Fig. 1As shown, the weight measuring device 5 comprises a weight sensor 51 and a data acquisition and transmission device 52, the weight sensor 51 transmits the detected data to the data acquisition and transmission device 52 for data recording, storage and sending, and the data acquisition and transmission device 52 can be a notebook computer.

[0040] Subsequently, the controllable three-way valve 34 is adjusted to the second air conveying pipe 32 in communication with the first and second air conveying pipe downstream pipes 33 through the three-way valve control device 25 in the air conveying device 3, the stems in the first material bin 28 will pass through the second air conveying pipe upstream pipe 29, the second air conveying pipe 32, the first and second air conveying pipe downstream pipes 33, the cyclone separator 41 and the air lock 42 into the second material bin 43, at this time the weight measuring device 5 records the weight M2 of the stems added to the second material bin 43, and all controllable actions return to the initial setting state, after obtaining the weight M1 of the cut tobacco and the weight M2 of the stems, the weight ratio of the stems to the cut tobacco in this time feeding can be obtained.

[0041] The above process can be repeated to automatically measure the ratio of the cut tobacco to the stems in the tobacco, and since there is no human influence and full automation can be achieved, the sample temporary storage bin is arranged between the continuous sampling and the material bin, so that the continuous and automatic detection of the ratio of the cut tobacco to the stems in the tobacco is realized.

[0042] The automatic detection method of the ratio of the cut tobacco to the stems based on the above detection device can comprise the following steps:

[0043] Step 1. Start the air blower, adjust the fluidization zone air field gap, so that the first fluidization zone air flow velocity V1 is set in the cut tobacco take-off speed VT1 interval range; the second fluidization zone air flow velocity V2 is greater than VT1 and less than VT2, wherein VT1 and VT2 are the take-off speeds of the cut tobacco and the stems, respectively;

[0044] Step 2. The controllable three-way valve is adjusted to make the first fluidization zone above and the cyclone separator communicate through the controllable three-way valve, the sample is poured into the feeder, the sample is separated in the solid-solid separation device, the stems fall into the first material bin, and the cut tobacco enters the gas-solid separator and falls into the second material bin;

[0045] After the separation in step 2 is completed, the cut tobacco in the second material bin is weighed;

[0046] Step 3. The controllable three-way valve is adjusted to make the first material bin and the cyclone separator communicate through the controllable three-way valve, the stems in the first material bin are sucked into the cyclone separator and fall into the second material bin, and the mixture of the cut tobacco and the stems in the second material bin is weighed again;

[0047] Step 4. Calculate the stem content, i.e. the ratio of the stems to the cut tobacco, and upload the obtained data to the production control system on the production line, and the mixture of the cut tobacco and the stems after the detection is sent back to the production line for production.

[0048] The utility model is applied to the cut tobacco production line, and the cut tobacco production line comprises a production line controller and a stem and leaf removal device connected with the production line controller, further comprises a production line sampling device and a sample temporary storage connected with the production line sampling device, the sample temporary storage is connected with the feeding device in the leaf stem ratio automatic detection device, and the weight measuring device in the leaf stem ratio automatic detection device is connected with the production line controller.

[0049] The cut tobacco production line can feed back the measurement result of the leaf stem ratio automatic detection device to control the stem and leaf removal device in the prior art cut tobacco production line, for example, when the production line controller detects that the stem content is higher than the standard value, the operation parameters of the removal device are adjusted to improve the stem removal effect. Fig. 1 As shown in the figure, the sample in the sample temporary storage 7 is sampled to the feeding device 1, and the sample in the sample temporary storage 7 comes from the production line sampling device 8, which samples the raw material after stem and leaf removal from the production line, thereby realizing the inspection and control of the stem and leaf removal effect of the production line.

[0050] The following is the detection data of the stem content of 10 batches of samples by the utility model, and it can be seen that the error between the result detected by the utility model and the actual sample stem content is basically controlled at about 0.1%.

[0051]

[0052] The cut tobacco leaf stem ratio automatic detection device and the detection method can separate the leaf and the stem by adjusting the airflow velocity of the fluidization zone, maintain the continuity of the feeding and the separation process, ensure the effective separation of the leaf and the stem in the cut tobacco, thereby obtaining the ratio of the two, improve the detection precision in the production process, realize the full-automatic control of the operation parameters, and ensure the stability of the detection data, so that the detection efficiency is greatly improved, and the multiple measurement data provide a data basis for the stable control and optimization of the process.

[0053] The foregoing is each preferred embodiment of the utility model, and each preferred embodiment can be arbitrarily combined and used if the preferred embodiments in each preferred embodiment are not obviously self-contradictory or are based on a certain preferred embodiment. The embodiments and the specific parameters in the embodiments are only for clearly describing the verification process of the utility model of the inventor and are not used to limit the patent protection scope of the utility model. The patent protection scope of the utility model is still subject to the claims, and equivalent structural changes made by referring to the content of the specification and the drawings of the utility model should also be included in the protection scope of the utility model.

Claims

1. A device for automatically detecting the proportion of stems in tobacco shreds, comprising a feeding device, characterized in that, The solid-solid separation device connected with the feeding device comprises a first fluidization zone connected with the feeding device, a second fluidization zone located below the first fluidization zone and having a smaller cross-sectional area than the first fluidization zone, and a gap adjusting device for adjusting the gap size between the first fluidization zone and the second fluidization zone; and a first discharge bin is arranged below the second fluidization zone. A controllable three-way valve is connected to the first fluidization zone through a pipeline, the other two ends of the controllable three-way valve are respectively connected to the first discharge bin and a separator of the gas-solid separation device through pipelines, a fan is connected to a gas outlet at the top of the separator, and a solid outlet at the bottom is aligned with the second discharge bin, and the second discharge bin is provided with a weight measuring device.

2. The tobacco shank proportion automatic detecting device according to claim 1, wherein, A bulk material device and a frequency control device for adjusting the rotation frequency of the bulk material device are arranged at the connection between the first fluidization zone and the second fluidization zone, and the bulk material device is a rotatable device with multiple paddles.

3. The tobacco shank proportion automatic detecting device according to claim 1, wherein, The separator is a cyclone separator.

4. The tobacco shank proportion automatic detecting device according to claim 3, wherein, An airlock is arranged below the solid outlet of the cyclone separator.

5. The tobacco shank proportion automatic detecting device according to claim 1, wherein, The feeding device comprises a bin, a sealing device is arranged at the opening of the bin, a feeding device is arranged at the bottom of the bin, and the feeding device is connected to the first fluidization zone through a feeding channel.

6. The tobacco shank proportion automatic detecting device according to claim 1, wherein, The controllable three-way valve is connected to a first air conveying pipeline and a second air conveying pipeline, the first air conveying pipeline and the second air conveying pipeline are respectively connected to the first fluidization zone and the first discharge bin through a first air conveying pipeline upstream pipeline and a second air conveying pipeline upstream pipeline, the diameter of the first air conveying pipeline is larger than that of the first air conveying pipeline upstream pipeline, and the diameter of the second air conveying pipeline is larger than that of the second air conveying pipeline upstream pipeline.

7. The tobacco shive strand rod proportion automatic detection device according to claim 1, wherein, The first fluidization zone and the second fluidization zone are provided with a gas flow rate sensor interface.

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