Device and process for online detection and adjustment of tobacco shred quality in air conveying process

Abstract

The invention provides an online tobacco shred quality detecting and adjusting device and process in the air conveying process. The online detecting and adjusting process comprises the steps that under the action of negative pressure, cigarette shreds are sucked into a cigarette making machine from a wind power shred feeding machine through a Z-shaped winnowing channel and a wind conveying pipeline in sequence, and the cigarette shreds enter the cigarette making machine through the steps of wind conveying stem removing and stem containing rate detecting in sequence; the step of air conveying and stalk removing is carried out in the Z-shaped winnowing channel; the step of detecting the stem content is carried out in the air conveying pipeline, winnowing parameters in the Z-shaped winnowing channel and the air conveying pipeline are cooperatively adjusted according to the detection result of the stem content, and the stem content of tobacco shreds entering the cigarette making machine is controlled. According to the online detecting and adjusting process, the stem content of the tobacco shreds in the air conveying process can be detected, the winnowing parameters can be adjusted, the stem content of the tobacco shreds can be optimized, the stem content of the tobacco shreds is adjusted through winnowing, and the rolling quality and the rolling stability of the tobacco shreds can be improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of tobacco processing, and particularly relates to an online detection and adjustment device for tobacco shred quality in a wind feeding process and a process. BACKGROUND

[0002] In the tobacco processing process, a certain amount of stem shreds are often contained in the tobacco shreds. The stem shreds are relatively hard and have a large density, and if not effectively removed, the subsequent product quality will be affected and the production efficiency will be reduced. However, in actual applications, there is a problem that short shreds and stem shreds with close sizes cannot be effectively separated, and the separation effect is often affected by the residual stem shreds. As the last link of the tobacco processing and the pre-link of the rolling, the process has certain requirements for the tobacco shreds sent to the rolling machine, such as the tobacco shred shape and the stem proportion, but generally cannot effectively detect and adjust.

[0003] The existing cigarette processing flow is shown in FIG. 1. Figure 1 As shown in FIG. 1, the tobacco leaves are cut and dried into tobacco shreds through the cutting and drying process. The dried tobacco shreds are first subjected to winnowing by a winnowing mechanism to remove the stems therein. Then, the stem-removed tobacco shreds are subjected to flavoring to modulate the tobacco flavor and form finished tobacco shreds. When the finished tobacco shreds are used, they are slowly discharged from a storage cabinet and then fed to a rolling machine by a plurality of tobacco feeding machines. The rolling machine further removes the stems in the tobacco shreds. Then, the tobacco shreds are subjected to rolling processing to finally obtain cigarette products. Therefore, the existing stem removal mainly has two links, one is the winnowing process after drying in the tobacco processing, and the other is the stem removal process in the rolling machine. The winnowing capacity in the tobacco processing is matched with the production capacity of the production line. For example, a 5000 Kg / h tobacco processing production line is generally equipped with a winnowing device, and all the tobacco shreds pass through the device. Therefore, the flow of the winnowing device also needs to reach 5000 Kg / h, and the size of the device is relatively large. However, the winnowing effect is negatively related to the flow, and the flow becomes larger, the winnowing effect becomes worse. Moreover, the space of the device becomes larger, and it is more difficult to ensure the uniformity of the air field in the device, so that the regions in the space cannot achieve the ideal air field, and the winnowing effect is further deteriorated. The flow of the stem removal in the rolling machine is small, and for the super-speed rolling machine, generally 6 kg of tobacco shreds can be processed per minute. However, the winnowing region of the machine is small, and the effective winnowing size is small, for example, the cross-sectional area of 100x100 is commonly used, and the winnowing pipeline is not more than 70 cm, which is difficult to ensure the winnowing effect, so that the stem content of the tobacco after the secondary stem removal in the prior art is generally 1-1.5%.

[0004] Therefore, how to control the stem content in the tobacco shreds and how to detect the shape of the tobacco shreds entering the rolling machine are problems to be solved in the tobacco processing technology. In addition, it is a difficult problem to be solved to find a suitable winnowing site to remove the stems, to require a small winnowing flow, and to have enough space to install the winnowing device to achieve the process requirements.

[0005] The patent application file with publication number CN118716672A discloses a method and system for detecting and adjusting the shape of tobacco after air separation, which includes: obtaining the shape parameters of tobacco after air separation, the shape parameters including at least two of length, width and curling degree; comparing the shape parameters of tobacco with the set target range to determine the adjustment amount of the shape parameters of tobacco; when the length needs to be adjusted, adjusting the length adjustment device according to the length adjustment amount; when the width needs to be adjusted, adjusting the tobacco cutter according to the width adjustment amount; when the curling degree needs to be adjusted, adjusting the drying intensity of the tobacco dryer according to the curling degree adjustment amount; until the length, width and curling degree of tobacco meet the target range, the length, width and curling degree of tobacco are comprehensively adjusted to meet the quality and stability requirements of cigarette products. However, the patent application only involves the adjustment amount of the shape parameters of tobacco, and does not involve the measurement and adjustment of the stem content in tobacco, and the stem content has an important influence on the rolling of tobacco. SUMMARY

[0006] Therefore, the main purpose of the present application is to provide a device and process for online detection and adjustment of tobacco quality during air feeding, which can detect the stem content of tobacco during air feeding, adjust the air separation parameters, and optimize the stem content of tobacco. In addition, by adjusting the stem content in tobacco through air separation, the quality and stability of tobacco rolling can be improved.

[0007] Specifically, a process for online detection and adjustment of tobacco quality during air feeding includes: under the action of negative pressure, perfumed tobacco is sequentially sucked into a cigarette machine from a Z-shaped air separation channel and an air feeding pipeline in a wind force tobacco feeder, and the perfumed tobacco sequentially passes through an air feeding stem removal step and a stem content detection step into the cigarette machine. The air feeding stem removal step includes: performing air feeding stem removal processing on the perfumed tobacco in the Z-shaped air separation channel, removing the stems in the perfumed tobacco, and obtaining perfumed tobacco after stem removal. The stem content detection step includes: the perfumed tobacco after stem removal enters the air feeding pipeline, sampling according to a preset sampling amount and sampling frequency to obtain a small sample of perfumed tobacco; the perfumed tobacco in each small sample is separated by air separation, and the stem content is calculated by weighing; according to the detection result of the stem content, the air separation parameters in the Z-shaped air separation channel and the air feeding pipeline are adjusted to control the stem content of the tobacco entering the cigarette machine.

[0008] The "perfumed tobacco" in the present application refers to tobacco prepared by cutting and drying process and adding flavoring. The "air separation parameters" in the present application mainly refer to air speed and air volume. The "air feeding pipeline" in the present application refers to a pipeline for feeding tobacco by air.

[0009] Further, in the step of detecting the stem-containing rate, the sampling amount of the sample for detecting the stem-containing rate is 80-100 g / min, and the sampling time is 2-4 min; in this way, the accuracy of the sampling structure can be improved as much as possible.

[0010] Further, in order to ensure that the tobacco consumption of the cigarette machine is matched, the tobacco flow of the Z-shaped winnowing channel and the air conveying pipeline is not more than 7 kg / min.

[0011] In order to further improve the tobacco quality, between the step of air conveying and stem removing and the step of detecting the stem-containing rate, the step of detecting the tobacco morphology is further included, that is, the morphology of the flavored tobacco after stem removing is detected in real time by image in the air conveying pipeline, the real-time morphology of the tobacco is obtained, and compared with the suitable tobacco morphology for rolling, and according to the comparison result, the processing parameters of the pre-process of the tobacco are adjusted in real time.

[0012] An online detection and adjustment device for tobacco quality in an air conveying process, comprising: an air feeding machine, a Z-shaped winnowing channel for removing tobacco stems, an air conveying pipeline and a cigarette machine, the air feeding machine and the cigarette machine are connected through the Z-shaped winnowing channel and the air conveying pipeline; a stem-containing rate detection mechanism is installed on the air conveying pipeline, the stem-containing rate detection mechanism comprises a sampler, a material taking pipe and a winnowing mechanism connected in sequence, the sampler is in communication with the air conveying pipeline and can obtain a tobacco sample from the air conveying pipeline, the tobacco sample enters the winnowing mechanism through the material taking pipe, the winnowing mechanism can separate the tobacco and the tobacco stems in the tobacco sample by winnowing and calculate the stem-containing rate by weighing, and the wind speed and the wind volume in the Z-shaped winnowing channel and the air conveying pipeline are adjusted according to the stem-containing rate detection result to control the stem-containing rate of the tobacco entering the cigarette machine.

[0013] In order to ensure that the tobacco consumption of the subsequent cigarette making machine is matched and the stem plug is removed completely, the Z-shaped winnowing channel is in a flat shape, and the size is greater than 30 cm×10 cm, and the longitudinal size is determined according to the layout of the production site; the air conveying pipeline is composed of a cylinder with an inner diameter of 30 cm, and the longitudinal size is determined according to the layout of the production site.

[0014] Further, the online detection and adjustment device further comprises a tobacco morphology detection mechanism installed on the air conveying pipeline, the tobacco morphology detection mechanism is located between the Z-shaped winnowing channel and the sampler, can detect the morphology of the tobacco in the air conveying pipeline in real time, and compared with the suitable tobacco morphology for rolling, and according to the comparison result, the processing parameters of the pre-process of the tobacco are adjusted in real time.

[0015] Further, a transparent air conveying pipe area is arranged in the air conveying pipe, the cut tobacco form detection mechanism comprises a background light source installed below the transparent air conveying pipe area and a plurality of industrial camera groups installed above the transparent air conveying pipe area. The material of the transparent air conveying pipe area can be organic glass or inorganic glass.

[0016] Further, in order to ensure that the area in the field of view is photographed and recognized completely and improve the accuracy of the cut tobacco form detection result, each industrial camera group is composed of at least three industrial cameras, the transparent air conveying pipe area has a flat structure with a thickness of 1.5-2.5 cm and a width and length determined by the cut tobacco flow. Preferably, the width is 85-95 cm and the length is 25-35 cm, so as to provide a suitable place for photographing.

[0017] Further, the air selection mechanism further comprises a cut tobacco receiving barrel, a tobacco stem receiving barrel and two electronic scales, the cut tobacco receiving barrel and the tobacco stem receiving barrel are used for collecting the cut tobacco and the tobacco stem separated from the flavored cut tobacco sample respectively, and the two electronic scales are used for weighing the cut tobacco and the tobacco stem separated from the flavored cut tobacco sample respectively.

[0018] Further, the online detection and adjustment device further comprises a return pipe connected with the cut tobacco receiving barrel and the air feeding machine, so as to send the weighed cut tobacco in the cut tobacco receiving barrel back to the air feeding machine.

[0019] Further, the online detection and adjustment device further comprises a stem sign collector connected with the Z-shaped air selection channel, used for collecting the tobacco stem removed from the Z-shaped air selection channel.

[0020] A cigarette processing process, comprising that tobacco raw materials sequentially undergo a cutting and drying process, a flavoring treatment, storage, air selection, the above-mentioned cut tobacco quality online detection and adjustment process, air selection treatment of a cigarette making machine and rolling treatment, to produce cigarette finished products.

[0021] Therefore, compared with the prior art, the above technical solution provided by the present application has the following advantages: 1) Through the Z-shaped air selection channel, the removed stems are selected by air, the wind selection parameters are adjusted through the measurement of the cut tobacco stem rate, and a lower stem rate is achieved; through the real-time measurement of the length, width and curl degree of the cut tobacco in the air conveying process, the real-time form of the cut tobacco is obtained, compared with the suitable rolling, and the processing technology of the cut tobacco is adjusted. 2) The application adjusts the process of winnowing and blending in the process of tobacco processing, cancels the winnowing link by using a separate winnowing mechanism after the tobacco leaf is dried, directly carries out blending and perfuming first, and realizes the winnowing function by increasing the Z-shaped winnowing channel in the air conveying process. The flow of the Z-shaped winnowing channel is matched with the feeder and does not exceed 7 kg / min, which is much smaller than the flow of the existing winnowing mechanism (such as 5000 Kg / h), and the air field is more uniform, which obviously improves the winnowing effect, reduces the stem content to less than 0.5%, and meets the rolling requirements of the existing super-high-speed rolling machine group.

[0022] 3) The application adjusts the tobacco stem content in the tobacco by detecting the stem content, reduces the tobacco stem in the tobacco, reduces the puncture rate of the cigarette product, and reduces the offensive odor in the smoking process. The tobacco structure is obtained by detecting the shape of the tobacco, and the tobacco rolling adaptability is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a flow chart of the existing cigarette processing process; Figure 2 It is a structure schematic diagram of the tobacco quality online detection and adjustment device in the air conveying process provided by the embodiment 1 of the application; Figure 3 It is a flow chart of the cigarette processing process provided by the embodiment 3 of the application.

[0024] The element symbols in the above figures: 1, air feeder, 2, Z-shaped winnowing channel, 3, background light source, 4, industrial camera group, 5, sampler, 6, air conveying pipeline, 7, cigarette machine, 8, winnowing mechanism, 901, tobacco receiving barrel, 902, stem receiving barrel, 101, 102, electronic scale, 11, material taking pipe, 12, material returning pipe, 13, stem plug collector. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the application clearer, the technical scheme of the application will be clearly and completely described below in combination with the embodiments of the application.

[0026] In the application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "transverse", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0027] And, the above-mentioned partial terms, in addition to can be used to express the orientation or position relationship, can also be used to express other meanings, for example, the term "upper" can also be used to express a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0028] In addition, the terms "mounting", "setting", "provided with", "connecting", "connecting" should be broadly understood. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or point connection; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Unless otherwise specified, the meaning of "multiple" is two or more.

[0029] Unless otherwise specified, the terms used in the present application are commonly used terms in the art, and the preparation process, test method and the like used in the embodiments are not specially described, which are conventional means known to those skilled in the art, and the raw materials and equipment used can be obtained from public commercial channels.

[0030] Example 1 Please refer to Figure 2 The present embodiment provides an online detection and adjustment device for tobacco quality in air conveying process, comprising: an air feeding machine 1, a Z-shaped air separation channel 2, a background light source 3, an industrial camera group 4, a sampler 5, an air conveying pipeline 6, a cigarette making machine 7, an air separation mechanism 8, a tobacco shred receiving barrel 901, a tobacco stem receiving barrel 902, an electronic scale 101, an electronic scale 102, a material taking pipe 11, a material returning pipe 12, and a stem plug collector 13.

[0031] The air feeding machine 1 receives the flavored tobacco shred conveyed from the previous process. The air feeding machine 1 and the cigarette making machine 7 are connected through the Z-shaped air separation channel 2 and the air conveying pipeline 6. The cigarette making machine 6 can suck the tobacco shred in the air feeding machine 1 through negative pressure through the air conveying pipeline 6 and the Z-shaped air separation channel 2, to supply the cigarette making machine for rolling cigarettes. The Z-shaped air separation channel 2 is connected with the stem plug collector 13. The Z-shaped air separation channel 2 realizes the separation of tobacco stems by air separation of the output tobacco shred in the air feeding machine 1, and removes most of the tobacco stems, which are collected by the stem plug collector 13. The air conveying pipeline 6 mainly detects the shape and stem content of the tobacco shred after the separation of the tobacco stems. By controlling the negative pressure value in the cigarette making machine to control the air volume and air speed and other air separation parameters in the Z-shaped air separation channel 2, the removal rate of the tobacco stems is controlled.

[0032] The tobacco flow of the air conveying pipe 6 and the Z-shaped air cleaning channel 2 is not more than 7 kg / min, the Z-shaped air cleaning channel 2 is in a flat shape, and the size is greater than 30 cm*10 cm, and the longitudinal size is determined according to the layout of the production site. In this embodiment, the tobacco flow of the air conveying pipe 6 and the Z-shaped air cleaning channel 2 is 7 kg / min, the size of the Z-shaped air cleaning channel 2 is 90 cm*8 cm, and the longitudinal size is 3000 cm; the air conveying pipe 6 is composed of a cylinder with an inner diameter of 30 cm, and the longitudinal size is arranged according to the layout of the production site.

[0033] A transparent air conveying pipe area is arranged in the air conveying pipe 6, the transparent air conveying pipe area is provided with a tobacco shape detection mechanism, which is used for detecting the shape of the flavored tobacco passing through the air conveying pipe 6 in real time, and comparing with the suitable rolling tobacco shape, and adjusting the processing parameters of the pre-process (cutting and drying process, participating in flavoring) of the tobacco in real time according to the comparison result. Specifically, the tobacco shape detection mechanism includes a background light source 3 arranged below the transparent air conveying pipe area and a plurality of industrial camera groups 4 arranged above the transparent air conveying pipe area. The material of the transparent air conveying pipe area can be organic glass or inorganic glass, and in this embodiment, the material is organic glass. The transparent air conveying pipe area provides the area and hardware conditions for photographing and identification, and supports the tobacco shape detection. The transparent air conveying pipe area is in a flat structure, and the thickness is 2 cm, which ensures that the tobacco is spread into a layer and passes through, and the width of the area is determined by the tobacco flow. In this embodiment, the width of the transparent air conveying pipe area is 90 cm, and the length is 30 cm; each group of the industrial camera group 4 is composed of three industrial cameras, which ensures that the area in the field of view is complete in photographing and identification.

[0034] The sampler 5, the air cleaning mechanism 8, the tobacco receiving barrel 901, the tobacco stem receiving barrel 902, the electronic scale 101, the electronic scale 102 and the material taking pipe 11 mainly constitute a stem content detection mechanism, which is used for sampling the tobacco passing through the tobacco shape detection from the air conveying pipe, obtaining a flavored tobacco sample, detecting the stem content of the flavored tobacco sample, and feeding back and adjusting the air cleaning parameters such as air volume and air speed according to the stem content detection result to control the tobacco stem content entering the cigarette making machine 7. Specifically, the sampler 5 is in communication with the air conveying pipe 6 and can sample the flavored tobacco sample from the air conveying pipe 6, and the flavored tobacco sample enters the air cleaning mechanism 8 through the material taking pipe 11. The sampler 5 samples by presetting the sampling amount and the sampling frequency, the preset sampling amount is 80-100 g / min, and the preset sampling frequency is 2.5-3.5 min; in this embodiment, the preset sampling amount is 90 g / min, and the preset sampling frequency is 3 min.

[0035] The winnowing mechanism 8 separates the tobacco and stems in the flavored tobacco sample by winnowing, and receives the tobacco and stems by the stem receiving bin 902 and the tobacco receiving bin 901 respectively, then weighs by the electronic scales 101, 102 and calculates the stem content, adjusts the winnowing parameters in the Z-shaped winnowing channel and the air conveying pipeline according to the stem content detection result. The tobacco received in the tobacco receiving bin 901 is returned to the air feeding machine 1 through the return pipe 12 after weighing.

[0036] Therefore, the online detection and adjustment device for tobacco quality in the air conveying process provided by the embodiment can solve the detection of the tobacco form and the stem content in the air conveying process and adjust the winnowing parameters to optimize the stem content in the tobacco. The detected tobacco form is compared with the suitable tobacco form for rolling to evaluate the quality of the tobacco production so as to adjust by other ways subsequently; the stem content in the tobacco is adjusted by winnowing, which can improve the quality and stability of the tobacco in rolling.

[0037] Embodiment 2 The embodiment provides an online detection and adjustment process for tobacco quality in the air conveying process, which adopts the online detection and adjustment device for tobacco quality provided by the embodiment 1, and specifically includes the following steps: 1) Air conveying and stem removal: connect the negative pressure of the cigarette making machine 7, and convey the tobacco from the air feeding machine 1 to the hopper of the cigarette making machine 7 through the Z-shaped winnowing channel 2 and the air conveying pipeline 6, the tobacco is separated from the stems by collision and scattering in the Z-shaped winnowing channel 2, the heavier stems fall into the stem collector 13 under the action of gravity, and the lighter tobacco enters the next process; 2) Tobacco form detection: the background light source 3 is below the air conveying pipeline 6, the transparent air conveying pipeline area where the air conveying pipeline 6 is located is made of organic glass, and the industrial camera group 4 is located above the transparent air conveying pipeline area, the transparent air conveying pipeline area is a flat structure, so that the tobacco after winnowing in the Z-shaped winnowing channel 2 is thinned into a layer, so that the field of view can cover the entire air conveying pipeline and as much tobacco as possible, the width, length, curling degree and other form characteristics of the tobacco are detected in real time by images, the real-time form of the tobacco is obtained, and the form of the tobacco is compared with the suitable tobacco form for rolling, the processing parameters of the previous process of the tobacco are adjusted in real time according to the comparison result, and the tobacco structure is improved; in addition to detecting the form, the impurities in the tobacco can also be detected; 3) Stem content detection: the sampler 5 takes out the cut tobacco from the air conveying pipe 6 through the material taking pipe 11 into the winnowing mechanism 8, the constant sampling amount is 90 g / min, and the sampling frequency is 3 min; the winnowing mechanism 8 air classifies the sampled cut tobacco, the lighter cut tobacco falls into the cut tobacco receiving barrel 901 through the air duct, and the heavier stems fall into the stem receiving barrel 902, which are weighed by the electronic scales 101 and 102 respectively, and the weighed cut tobacco is sent back to the air feeding machine 1; according to the stem content detection result, the negative pressure value of the air conveying is adjusted appropriately to control the stem content of the cut tobacco entering the cigarette making machine 7. When the cut tobacco stem content is small, it indicates that the current air speed is appropriate, and when the cut tobacco stem content is large, the air conveying negative pressure value is reduced to increase the rejection amount.

[0038] Embodiment 3 Please refer to Figure 3 The embodiment provides a cigarette processing technology. The tobacco raw material is sequentially subjected to a cutting and drying process, a blending and flavoring process, a storage process, a winnowing process, an online cut tobacco quality detection and adjustment process, a winnowing process of a cigarette making machine, and a cigarette making process to produce cigarette products. The cutting and drying process mainly includes adjusting the cutting width by a cutter, adjusting the length of cut tobacco by a cut tobacco length adjusting device, and adjusting the shape of cut tobacco by a cut tobacco drying device.

[0039] The winnowing process and the online cut tobacco quality detection and adjustment process are processed by the same method as the online cut tobacco quality detection and adjustment process in the air conveying process provided in Embodiment 2. Specifically, the processing parameters of the pre-process of cut tobacco are adjusted in real time according to the feedback of the cut tobacco shape detection result to improve the structure of cut tobacco. When the length of cut tobacco needs to be adjusted, the cut tobacco length adjusting device is adjusted according to the length adjustment amount; when the width of cut tobacco needs to be adjusted, the cutter is adjusted according to the width adjustment amount; and when the curl degree of cut tobacco needs to be adjusted, the drying intensity of the cut tobacco drying device is adjusted according to the curl degree adjustment amount; until the length, width, and curl degree of cut tobacco meet the target range. Further, the negative pressure value of the air conveying is adjusted appropriately according to the stem content detection result to control the stem content of cut tobacco entering the cigarette making machine. When the stem content of cut tobacco is small, it indicates that the current air speed is appropriate, and when the stem content of cut tobacco is large, the air conveying negative pressure value is reduced to increase the rejection amount. Preferably, the air speed is 20-22 m / s, and the stem content of cut tobacco is less than 0.5%.

[0040] The stem content of cut tobacco subjected to the Z-type winnowing channel winnowing in the cigarette processing technology of the embodiment is 2.5%, and the stem content of cut tobacco subjected to the winnowing in the existing cigarette processing technology is shown in Table 1. Figure 1 The stem content of cut tobacco subjected to the winnowing in the existing cigarette processing technology is shown in Table 1.

[0041] Table 1 Comparison of the influence of different winnowing parameters in different processes on the stem content of cut tobacco after winnowing

[0042] As can be seen from Table 1, the process provided by the embodiment of the present application adjusts the tobacco stem content in the cut tobacco through the stem content detection. Compared with the existing cigarette processing process, the cigarette processing process provided by the embodiment can effectively reduce the tobacco stems in the cut tobacco, so that the tobacco stem content is reduced to within 0.5%, thereby effectively reducing the puncture rate of the cigarette product and reducing the offensive odor in the smoking process.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application rather than limit them; although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application claimed.

Claims

1. A process for online detection and adjustment of tobacco quality in a pneumatic conveying process, comprising: under the action of negative pressure, tobacco with flavoring is sequentially drawn from a pneumatic feeder into a cigarette maker through a Z-shaped air flow channel and a pneumatic conveying pipeline, and the tobacco with flavoring sequentially passes through a pneumatic conveying and stem removal step and a stem content detection step into the cigarette maker; wherein the pneumatic conveying and stem removal step comprises: the tobacco with flavoring is subjected to pneumatic conveying and stem removal treatment in the Z-shaped air flow channel, and the removed stems in the tobacco with flavoring are obtained after stem removal; the stem content detection step comprises: the tobacco with flavoring after stem removal enters the pneumatic conveying pipeline, sampling is performed according to a preset sampling amount and sampling frequency to obtain a tobacco with flavoring sample; the tobacco with flavoring sample is subjected to air flow to separate the tobacco and stems therein, and the stem content is calculated by weighing; and according to the detection result of the stem content, air flow parameters in the Z-shaped air flow channel and the pneumatic conveying pipeline are adjusted in coordination to control the stem content of the tobacco entering the cigarette maker.

2. The in-line detection conditioning process of claim 1, wherein, In the step of detecting the stem content, the sampling amount of the stem content detection sample is 80-100 g / min, and the sampling time is 2-4 min.

3. The in-line detection conditioning process of claim 2, wherein, The tobacco flow rate of the Z-shaped air flow channel and the pneumatic conveying pipeline is not more than 7 kg / min.

4. The in-line detection conditioning process of claim 1 or 2 or 3, wherein, Between the pneumatic conveying and stem removal step and the stem content detection step, there is further a step of: tobacco morphology detection: the morphology of the tobacco after stem removal is detected in real time by image in the pneumatic conveying pipeline, the real-time morphology of the tobacco is obtained, compared with a suitable rolling tobacco morphology, and the processing parameters of the pre-process of the tobacco are adjusted in real time according to the comparison result.

5. A device for on-line detection and adjustment of tobacco quality in a pneumatic conveying process, characterized in that It comprises: a pneumatic feeder, a Z-shaped air flow channel for removing stems, a pneumatic conveying pipeline and a cigarette maker, the pneumatic feeder and the cigarette maker being connected through the Z-shaped air flow channel and the pneumatic conveying pipeline; a stem content detection mechanism is installed on the pneumatic conveying pipeline, the stem content detection mechanism comprises a sampler, a material taking pipe and an air flow mechanism connected in sequence, the sampler communicates with the pneumatic conveying pipeline and can sample tobacco samples from the pneumatic conveying pipeline, the tobacco samples pass through the material taking pipe into the air flow mechanism, the air flow mechanism can separate the tobacco and stems in the tobacco samples by air flow and calculate the stem content by weighing; and according to the detection result of the stem content, the air speed and air volume in the Z-shaped air flow channel and the pneumatic conveying pipeline are adjusted in feedback to control the stem content of the tobacco entering the cigarette maker.

6. The in-line detection conditioning device of claim 5, wherein, The Z-shaped air flow channel is in a flat shape, the size is greater than 30 cm×10 cm, and the longitudinal size is determined according to the layout of the production site.

7. The online detection conditioning device of claim 5, wherein, It further comprises: a tobacco morphology detection mechanism installed on the pneumatic conveying pipeline, the tobacco morphology detection mechanism is located between the Z-shaped air flow channel and the sampler, can detect the morphology of the tobacco in the pneumatic conveying pipeline in real time, and compare with a suitable rolling tobacco morphology, and the processing parameters of the pre-process of the tobacco are adjusted in real time according to the comparison result.

8. The in-line detection conditioning device of claim 7, wherein, A transparent pneumatic conveying pipeline region is provided in the pneumatic conveying pipeline, and the tobacco morphology detection mechanism comprises a background light source installed below the transparent pneumatic conveying pipeline region and a plurality of industrial cameras installed above the transparent pneumatic conveying pipeline region.

9. The in-line detection conditioning device of claim 8, wherein, The transparent air conveying pipe area is a flat structure with a thickness of 1.5-2.5 cm, and the width and length are determined by the tobacco flow.

10. The in-line detection conditioning device of claim 9, wherein, The width of the transparent air conveying pipe area is 85-95 cm, and the length is set to 25-35 cm.

11. An in-line detection conditioning device according to any one of claims 5-10, characterized in that, The winnowing mechanism further comprises a tobacco receiving bucket, a stem receiving bucket and two electronic scales, the tobacco receiving bucket and the stem receiving bucket are used to collect the tobacco and stems separated from the flavored tobacco sample respectively, and the two electronic scales are used to weigh the tobacco and stems separated from the flavored tobacco sample respectively.

12. The in-line detection conditioning device of claim 11, wherein, The online detection and adjustment device further comprises a return pipe which is connected to the tobacco receiving bucket and the air feeding machine, and can send the weighed tobacco in the tobacco receiving bucket back to the air feeding machine.

13. The in-line detection conditioning apparatus of claim 5, wherein, The online detection and adjustment device further comprises a stem plug collector connected to the Z-shaped winnowing channel, which is used to collect the stems removed from the Z-shaped winnowing channel.

14. A cigarette processing process, comprising that the tobacco raw material sequentially undergoes a cutting and drying process, a blending and flavoring treatment, storage, the online detection and adjustment process of any one of claims 1-4, an air feeding treatment of a cigarette making machine and a rolling treatment, to produce cigarette finished products.

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