Stem collecting device of VAS equipment and VAS equipment

Abstract

The invention belongs to the technical field of cigarette cut tobacco making, and particularly relates to a stem collecting device of VAS equipment and the VAS equipment. The device comprises a conical collector, a collecting basin and an active air suction pipeline; the collecting basin is arranged below the stem discharge port, and the coverage area of the collecting basin is larger than the projection area of the stem discharge port on the horizontal plane of the collecting basin; the conical collector is suspended on the collecting basin, and the conical collector and the collecting basin are coaxially arranged; the conical surface of the conical collector faces the stem discharging opening; through holes are formed in a conical surface array of the conical collector to form anti-turbulent flow holes; the method comprises the following steps: collecting stems; the stem slivers falling from the stem sliver discharging opening are collected into the driving air suction pipeline under the action of self gravity and negative pressure and are conveyed to the next working procedure; the conical collector is arranged on the collecting basin, so that the interference of negative pressure on the suspension state of tobacco shreds above the stem sliver discharging opening is reduced or eliminated; the silk content in the stems is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of cigarette shred production, and in particular relates to a stem collection device for VAS equipment and the VAS equipment. Background Art

[0002] Cigarette factories dry incoming cut tobacco using a cut dryer and air-separate it using VAS equipment. The VAS equipment (or VAS fluidized bed) is typically located within the cut dryer's discharge hood to cool the cut tobacco and air-separate or separate the cut tobacco, tobacco dust, and stems. Cut tobacco fed into the cut dryer's inlet hood is dried by a drying drum before entering the discharge hood. A screening drum box located above the discharge hood separates steam from the cut tobacco. The separated steam is recycled through an exhaust pipe, and the VAS equipment within the discharge hood air-separates the separated cut tobacco. The stems are discharged from below to a VAS stem collection device, completing the separation and discharge of the cut tobacco and stems.

[0003] Currently, the VAS stem collection device uses an open basin to collect the stems and uses negative pressure to centrally convey the collected stems. This open basin collection method can easily cause material overflow, impacting 6S management practices such as hygiene and cleanliness at the production site. Furthermore, the negative pressure causes the suspended tobacco in the discharge hood to change its suspension velocity, forcing it to fall into the stem collection device. This can lead to a large amount of tobacco being mixed into the stems, resulting in material waste and substandard tobacco content. Summary of the Invention

[0004] The purpose of the present invention is to provide a VAS device and a VAS device to solve the problems mentioned in the background art.

[0005] In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows:

[0006] In a first aspect, a stem picking collection device for a VAS device is installed below a stem picking discharge port of the VAS device and is used to collect the stem pickings separated by air from the VAS device; the device comprises a conical collector, a collecting basin and an active suction duct; the collecting basin is arranged below the stem picking discharge port, and the coverage area of the collecting basin is larger than the horizontal projection area of the stem picking discharge port on the collecting basin; the conical collector is suspended on the collecting basin, and the conical collector and the collecting basin are arranged coaxially; the conical surface of the conical collector faces the stem picking discharge port; the conical surface of the conical collector is The surface array is provided with through holes to form anti-turbulence holes; a gap is provided between the lower edge of the conical collector and the inner surface of the collection basin, and the gap can allow gas and stems to pass through; a drop-out port is provided at the bottom of the collection basin, and the drop-out port is connected to the active suction duct; when the negative pressure generated by the active suction duct acts on the collection basin, the stems dropped from the stem drop-out port are collected into the active suction duct under the action of their own gravity and negative pressure, and the conical collector, while taking over the stems, also reduces or eliminates the interference of the negative pressure on the suspended state of the tobacco above the stem drop-out port.

[0007] The present invention mainly comprises three parts: a conical collector, a collection basin and an active suction duct, and the overall structure is relatively simple; a negative pressure collection system can be formed; the stems are collected by utilizing the high efficiency and stability of negative pressure collection; and the unique structure of the conical collector is utilized to reduce or even eliminate the interference of the negative pressure generated by the active suction duct on the suspension speed of the tobacco in the VAS device, that is, to reduce the disturbance of the collected negative pressure on the air selection; the stems can be fully selected, and the tobacco can be prevented from being forced to mix into the stems.

[0008] Furthermore, a support column is provided at the lower edge of the conical collector, and the bottom end of the support column abuts or is fixed to the inner surface of the collection basin. The conical collector and the collection basin can be connected by welding, making the overall structure simpler, stronger and more reliable, and having a longer service life.

[0009] Furthermore, a cluster shell is arranged at intervals on the top of the collection basin, and a transition channel is left between the top of the collection basin and the bottom of the cluster shell; when the negative pressure generated by the active suction duct acts on the collection basin, the air outside the collection basin can enter the space between the collection basin and the conical collector from the transition channel.

[0010] The cluster shell can expand the coverage of the collection basin without affecting the entry of external air into the space between the collection basin and the conical collector, producing a similar air lock effect. In combination with the conical collector, it can even completely eliminate the turbulent effect of negative pressure on air separation.

[0011] Furthermore, the drop-out port is connected to the active suction duct via a vertical pipe, the wall of which is provided with an air vent. The first port of the active suction duct is open to the air, while the second port is connected to an exhaust fan via a hose. Multiple gas flow paths are provided through the transition channel, the air vent, and the first port of the active suction duct. While achieving the effect of efficient negative pressure collection, the conical collector's air separation function is maintained, that is, the conical collector's shielding of the negative pressure is not affected, thereby reducing the turbulence caused by the negative pressure on the air separation.

[0012] Furthermore, a movable column is provided at the lower edge of the conical collector, a movable hole is opened on the collection basin, and a guide cylinder is vertically provided on the outer wall of the collection basin corresponding to the movable hole; a pressure detection structure is installed on the outer wall of the collection basin, and the movable column extends into the guide cylinder through the movable hole, and extends from the bottom end of the guide cylinder to abut against the pressure detection structure; the pressure detection structure is used to detect the pressure change data generated by the stems carried by the conical collector within a specified period.

[0013] Furthermore, the pressure detection structure includes a mounting ring integrally provided on the outer wall of the collection basin, and a pressure sensor installed on the mounting ring. The pressure sensor is electrically connected to a processor. The processor can analyze the situation of the stems received on the conical collector according to the feedback signal of the pressure sensor, and control the exhaust power of the active suction duct.

[0014] As described above, the processor can determine whether the conical collector is operating normally based on the analysis of the data detected by the pressure detection structure; and before and after the exhaust efficiency of the active suction duct needs to be adjusted, the processor can output the comparative effect of collecting the stem sticks before and after the adjustment to help the operator optimize the device.

[0015] Furthermore, a vibrator is provided on the guide tube, and the vibrator is electrically connected to the processor. The processor controls the vibrator to vibrate the conical collector.

[0016] Furthermore, the system also includes a laser scanning mechanism mounted on the outside of the collection basin, with its scanning angle directed toward the conical surface of the conical collector, to monitor the blockage of the anti-turbulence holes. Based on the blockage, a processor determines whether to increase the extraction efficiency of the active suction duct or activate and increase the vibration of the conical collector to accelerate the collection of collected stems and clear the anti-turbulence holes, thereby maintaining a stable operating condition.

[0017] Furthermore, the laser scanning structure includes at least a mounting rod and at least one laser monitoring component mounted on the outside of the collection basin via the mounting rod, and the laser monitoring component is a laser radar or an industrial laser scanner.

[0018] In a second aspect, a VAS device includes a wind selection body and a stem collection device of the VAS device; the wind selection body is provided with at least a tobacco discharge port and a stem discharge port, and the stem collection device of the VAS device is installed below the stem discharge port.

[0019] The invention adopting the above technical solution has the following advantages:

[0020] In the present application, a negative pressure collection system can be formed by setting up a collection basin and an active suction duct; it has high efficiency and stability, and can effectively separate the suspended tobacco from the air and collect it in a centralized manner. The conical collector suspended on the collection basin, with its unique structural design, can reduce the interference of negative pressure on the suspended state of the tobacco, so that the tobacco can be more smoothly air-selected and transitioned during the collection process; fully select the stems and reduce the silk content in the stems. In addition, the reduction of negative pressure interference can also reduce the interference with the fallen stems, so that the collection basin can better concentrate and collect the stems; avoid the overflow of the stems and improve the cleanliness of the production site. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0022] Figure 1 This is a structural schematic diagram of an embodiment of a stem tag collection device for a VAS device according to the present invention;

[0023] Figure 2 A schematic front view of an embodiment of a stem tag collection device for a VAS device according to the present invention;

[0024] Figure 3 This is a second structural diagram of an embodiment of a stem tag collection device for a VAS device according to the present invention;

[0025] Figure 4 A schematic side view of an embodiment of a stem tag collection device for a VAS device according to the present invention;

[0026] Figure 5 This is a third structural diagram of an embodiment of a stem tag collection device for a VAS device according to the present invention;

[0027] Figure 6 This is a fourth structural diagram of an embodiment of a stem tag collection device for a VAS device according to the present invention;

[0028] Figure 7This is a schematic diagram of the principle of an embodiment of a stem tag collection device for a VAS device according to the present invention;

[0029] The main component symbols are described as follows:

[0030] 101. Conical collector; 102. Collecting basin; 103. Dropping port; 104. Active suction duct; 105. Second port; 106. Support column; 107. Anti-turbulence hole; 108. First port; 109. Support frame; 110. Transition channel; 111. Vertical pipe; 112. Vent; 113. Cluster shell; 114. First pressure sensor; 115. Mounting ring; 116. Second pressure sensor; 117. Guide tube; 118. Mounting rod; 119. LiDAR. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that in the drawings or descriptions, similar or identical parts are numbered the same. Implementations not shown or described in the drawings are forms known to those of ordinary skill in the art. In addition, directional terms mentioned in the embodiments, such as "upper," "lower," "top," "bottom," "left," "right," "front," and "back," are merely references to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0032] like Figures 1 to 7As shown in one embodiment, a stem picking collection device for a VAS device is installed below a stem picking discharge port of the VAS device and is used to collect the stem pickings separated by air from the VAS device; it includes a conical collector 101, a collection basin 102 and an active suction duct 104; the collection basin 102 is arranged below the stem picking discharge port, and the coverage area of the collection basin 102 is larger than the horizontal plane projection area of the stem picking discharge port on the collection basin 102; the conical collector 101 is suspended on the collection basin 102, and the conical collector 101 and the collection duct 104 are connected. Basin 102 is coaxially arranged; the conical surface of conical collector 101 faces the stalk discharge port; the conical surface array of conical collector 101 is provided with through-holes forming anti-turbulence holes 107; a gap is provided between the lower edge of conical collector 101 and the inner surface of collection basin 102, allowing gas and stalks to pass through the gap; the conical surface of conical collector 101 and the inner surface of collection basin 102 are opposite each other, and the airflow entering through the gap is blocked and redirected by the inner wall of collection basin 102, then flows upward through anti-turbulence holes 107, with some of it flowing back into the VAS equipment. Collection basin 102 has a discharge port 103 at its bottom, which is connected to an active suction duct 104; the active suction duct 104 can be installed on the ground near the VAS equipment via a support frame 109. The discharge port 103 can be connected to the active suction duct 104 via a vertical pipe 111. The first port 108 of the active suction duct 104 is open to the air, and the second port 105 of the active suction duct 104 is connected to an exhaust fan via a hose. The exhaust fan can be installed in a stem collection box, and the stems extracted by negative pressure are collected in the stem collection box. When the negative pressure generated by the active suction duct 104 acts on the collection basin 102, the stems falling from the stem discharge port are collected in the active suction duct 104 under the action of their own gravity and negative pressure. The conical collector 101 not only receives the stems, but also reduces or eliminates the interference of negative pressure on the suspended state of the tobacco above the stem discharge port.

[0033] In fact, typical VAS equipment also uses a negative pressure collection system to collect stems. This system is highly efficient and stable, effectively separating suspended tobacco from the air and collecting it in a centralized manner, which helps reduce production costs and improve production efficiency. However, under the influence of negative pressure, the suspension velocity (or suspension state) of some tobacco can change significantly, causing the tobacco to be forced into the stem collector too quickly, potentially affecting the quality and taste of the tobacco. VAS equipment internally includes a screen and separation trough, and a drop hopper is usually installed below the screen. Air flows from the mesh plate upwards. After the tobacco enters the VAS equipment, it is semi-floating and cooled in the area above the mesh plate. Due to the vibration and ejection of the vibrating device, the tobacco is then cut into the separation trough. Air also flows from the mesh plate upwards. The different densities and floating speeds of the various components in the tobacco (tobacco, tobacco dust and stems) are utilized. Under the action of air, the tobacco dust and stems are separated from the tobacco. The remaining tobacco continues to be semi-floating and flows out along the separation trough under the action of vibration and ejection.

[0034] In this embodiment, the conical collector 101 can be die-cast from a single steel plate or aluminum alloy plate. Three support columns 106 are welded to the lower edge of the conical collector 101. The bottom ends of the support columns 106 are welded to the inner surface of the collection basin 102. Laser welding can be used to connect the conical collector 101 to the collection basin 102. The overall structure composed of the conical collector 101, the collection basin 102 and the active suction duct 104 is relatively simple; the stems are collected by negative pressure during operation, which has high efficiency and stability; and the unique structure of the conical collector 101 is used to receive and disperse the fallen stems. At the same time, since the conical collector 101 is facing the drop port 103, the negative pressure of the active suction duct 104 can be reduced by blocking; the interference of the negative pressure generated by the active suction duct 104 on the suspension speed of the tobacco in the VAS equipment is reduced or even eliminated, that is, the turbulence of the collected negative pressure on the air selection is reduced, and the suspension speed changes too much during air selection are avoided; the stems can be fully selected, and the tobacco can be prevented from being forced to mix with the stems.

[0035] In fact, in this embodiment, the support column 106 can also be configured to abut against the inner surface of the collection basin 102 as needed; such a structural design can facilitate the adjustment and maintenance of the conical collector 101.

[0036] In this embodiment, if Figure 3 、 Figure 4As shown, a cluster shell 113 is provided at the top of the collection basin 102, and a transition channel is left between the top of the collection basin 102 and the bottom of the cluster shell 113; the cluster shell 113 can also be installed using support columns 106; the transition channel allows air to circulate. When the negative pressure generated by the active suction duct 104 acts on the collection basin 102, it is blocked by the conical collector 101 and the negative pressure will not continue to affect the area above the conical collector 101. The air outside the collection basin 102 can enter the space between the collection basin 102 and the conical collector 101 through the transition channel 110, which will produce an effect similar to an air lock and affect the turbulence caused by the negative pressure on the air separation; in combination with the conical collector 101, the turbulence caused by the negative pressure on the air separation can even be completely eliminated. Avoid the negative pressure of the active suction duct 104 from affecting the suspension speed of tobacco in the VAS equipment, reduce the disturbance of negative pressure on air selection, fully select the stems, reduce the amount of tobacco in the stems, provide favorable conditions for air selection, and obtain high-quality tobacco with less waste.

[0037] In this embodiment, if Figure 4 、 Figure 7 As shown, a vent 112 is provided in the wall of the vertical pipe 111; the first port 108 of the active suction duct 104 is connected to the air, and the second port 105 of the active suction duct 104 is connected to the exhaust fan. Multiple gas flow paths are provided through the transition channel 110, the vent 112, and the first port 108 of the active suction duct 104, achieving efficient negative pressure collection of stems while maintaining the function of the conical collector 101 and reducing the turbulence caused by negative pressure on the air separation.

[0038] In this embodiment, if Figure 5 、 Figure 6 As shown, the support column 106 at the lower edge of the conical collector 101 can be set as a movable column, a movable hole is opened on the collection basin 102, and a guide cylinder 117 is vertically provided on the outer wall of the collection basin 102 corresponding to the movable hole; a pressure detection structure is installed on the outer wall of the collection basin 102, and the movable column extends into the guide cylinder 117 through the movable hole, and extends from the bottom end of the guide cylinder 117 to abut against the pressure detection structure; the pressure detection structure is used to detect the pressure change data generated by the stems received on the conical collector 101 within a specified period.

[0039] Among them, the pressure detection structure includes a mounting ring 115 integrally arranged on the outer wall of the collection basin 102, and a pressure sensor installed on the mounting ring 115. There are two pressure sensors installed, namely a first pressure sensor 114 and a second pressure sensor 116 symmetrically arranged. The first pressure sensor 114 and the second pressure sensor 116 are electrically connected to a processor. The processor can analyze the situation of the stems received on the conical collector 101 according to the feedback signals of the first pressure sensor 114 and the second pressure sensor 116, and control the exhaust power of the active suction duct 104, thereby improving the degree of automation of the device.

[0040] In fact, as needed, a cycle of 10 seconds can be set, and a pressure change curve of the conical collector 101 in the process of taking over the stems can be drawn through experiments as a reference curve, and an average value can be set in the reference curve; in the process of pressure detection, the real-time pressure collected by the first pressure sensor 114 and the second pressure sensor 116 is used to determine whether the real-time pressure exceeds the average value by too much. When the excess value is greater than the set threshold, it is considered necessary to increase the exhaust power of the active suction duct 104.

[0041] In fact, this embodiment can also change the distance of the conical collector 101 relative to the drop port 103 by setting a telescopic rod to adjust the gap between the lower edge of the conical collector 101 and the inner surface of the collection basin 102, thereby increasing or reducing the influence of the negative pressure generated by the active suction duct 104 on the gap, thereby achieving a balance between negative pressure collection and reducing the influence of negative pressure on the suspension speed of tobacco.

[0042] In fact, a vibrator is provided on the guide cylinder 117. The vibrator can be a high-frequency vibration motor. The high-frequency vibration motor is electrically connected to the processor. The processor controls the high-frequency vibration motor to vibrate the guide cylinder 117, and indirectly vibrates the conical collector 101 through the movable column; the cone surface of the auxiliary conical collector 101 guides and disperses the falling stalks.

[0043] In this embodiment, if Figure 6 As shown, the system also includes a laser scanning mechanism, mounted on the outside of the collection basin 102. Its scanning angle is directed toward the conical surface of the collector cone 101, monitoring the blockage of the anti-turbulence holes 107. Based on the blockage, the processor determines whether to increase the extraction efficiency of the active suction duct 104 or activate and increase the vibration of the collector cone 101 to accelerate the collection of collected stalks and clear the anti-turbulence holes 107, thereby maintaining a stable operating condition. The laser scanning mechanism includes a mounting rod 118 and a laser radar 119 mounted on the outside of the collection basin 102 via the mounting rod 118.

[0044] In fact, in this embodiment, a suitable industrial laser scanner may be selected according to the detection frequency and working conditions to monitor the blockage of the anti-spoiler holes 107 .

[0045] In fact, a fluorescent layer is coated inside the anti-spoiler hole 107, which helps to improve the light reflection efficiency of the laser radar 119, thereby improving the monitoring efficiency and accuracy of the laser radar 119.

[0046] In this example, the device was tested, and the collection system's performance, including the amount of stems collected and the separation of cut tobacco, was recorded. The test results demonstrate that the device fully addresses the requirements of air separation, without compromising the high efficiency of air separation. Furthermore, it effectively prevents the effects of negative pressure on the suspension velocity of cut tobacco, significantly reducing the mixing of cut tobacco with stems and improving the efficiency of cut tobacco use. This device effectively separates stems and cut tobacco, reducing the cut tobacco content in stems and significantly improving product quality. It also reduces material spillage at the production site, improving cleanliness and protecting the environment and other equipment.

[0047] In another embodiment, a VAS device includes a wind separation main body and a stem collection device. The wind separation main body is provided with a tobacco shred discharge port and a stem discharge port, and the stem collection device is installed below the stem discharge port. The stem collection device of the above embodiment enables the VAS device to better separate the stems and tobacco shreds during wind separation, reducing the amount of tobacco shreds in the stems and avoiding the impact of negative pressure on the suspension velocity of the tobacco shreds.

[0048] The air separation system consists of a mesh plate installed within the discharge hood and an inverted V-shaped separation trough. Air flows from bottom to top through the mesh plate and the separation trough, effectively separating suspended tobacco entering the discharge hood from the air and collecting it centrally, which helps reduce production costs. Specifically, air flows from bottom to top through the mesh plate. After the tobacco enters the VAS equipment, it undergoes semi-floating cooling in the area above the mesh plate. The tobacco is then cut into the separation trough, which also has air flowing from bottom to top. Taking advantage of the different densities and floating speeds of the various components in the tobacco, the air separates the tobacco dust and stems from the tobacco. The remaining tobacco continues to semi-float and flows out of the separation trough due to vibration and projection, and is discharged from the tobacco discharge port. The separated stems fall from the stem discharge port and are collected by the stem collection device.

[0049] The above describes in detail the stem signature collection device for a VAS device provided by the present invention. The description of the specific embodiments is intended only to facilitate understanding of the present invention's method and core concepts. It should be noted that those skilled in the art will readily appreciate that various improvements and modifications to the present invention can be made without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the claims.

Claims

1. A stem collection device for a VAS device, installed below a stem discharge port of the VAS device, for collecting stems separated by air from the VAS device; characterized in that: The invention comprises a conical collector (101), a collection basin (102) and an active suction duct (104); the collection basin (102) is arranged below the stalk discharge port, and the coverage area of the collection basin (102) is larger than the horizontal plane projection area of the stalk discharge port on the collection basin (102); the conical collector (101) is suspended on the collection basin (102), and the conical collector (101) and the collection basin (102) are arranged coaxially; the conical surface of the conical collector (101) faces the stalk discharge port; the conical surface array of the conical collector (101) is provided with through holes. An anti-turbulence hole (107) is formed; a gap is provided between the lower edge of the conical collector (101) and the inner surface of the collection basin (102), and the gap allows gas and tobacco stems to pass through; a discharge port is provided at the bottom of the collection basin (102), and the discharge port is connected to the active suction duct; when the negative pressure generated by the active suction duct acts on the collection basin, the tobacco stems dropped from the discharge port are collected into the active suction duct under the action of their own gravity and negative pressure, and the conical collector, while receiving the tobacco stems, also reduces or eliminates the interference of the negative pressure on the suspended state of tobacco above the discharge port.

2. The stem signature collection device for VAS equipment according to claim 1, characterized in that: A support column is provided at the lower edge of the conical collector, and the bottom end of the support column abuts or is fixed to the inner surface of the collection basin.

3. The stem signature collection device for VAS equipment according to claim 1, characterized in that: A cluster shell is arranged at intervals at the top of the collection basin, and a transition channel is left between the top of the collection basin and the bottom of the cluster shell; when the negative pressure generated by the active suction duct acts on the collection basin, the air outside the collection basin can enter the space between the collection basin and the conical collector from the transition channel.

4. The stem tag collection device of the VAS equipment according to claim 1 or 3, characterized in that: The blanking port is connected to the active air suction duct through a vertical pipe, and a vent hole is provided on the wall of the vertical pipe.

5. The stem tag collection device of the VAS equipment according to claim 1, characterized in that: A movable column is provided at the lower edge of the conical collector, a movable hole is opened on the collection basin, and a guide cylinder is vertically provided on the outer wall of the collection basin corresponding to the movable hole; a pressure detection structure is installed on the outer wall of the collection basin, the movable column extends into the guide cylinder through the movable hole, and extends from the bottom end of the guide cylinder to abut against the pressure detection structure; the pressure detection structure is used to detect the pressure change data generated by the stems carried by the conical collector within a specified period.

6. The stem tag collection device of the VAS equipment according to claim 5, characterized in that: The pressure detection structure includes a mounting ring integrally provided on the outer wall of the collection basin, and a pressure sensor installed on the mounting ring. The pressure sensor is electrically connected to a processor. The processor can analyze the situation of the stems received by the conical collector according to the feedback signal of the pressure sensor, and control the exhaust power of the active suction duct.

7. The stem tag collection device for VAS equipment according to claim 6, characterized in that: The guide cylinder is provided with a vibrator, which is electrically connected to the processor. The processor controls the vibrator to vibrate the conical collector.

8. The stem tag collection device for VAS equipment according to claim 1, characterized in that: It also includes a laser scanning structure, which is installed on the outside of the collection basin. The scanning angle of the laser scanning structure is toward the conical surface of the conical collector, and is used to monitor the blockage of the anti-spoiler holes.

9. The stem tag collection device for VAS equipment according to claim 8, characterized in that: The laser scanning structure at least includes a mounting rod and at least one laser monitoring component mounted on the outside of the collection basin via the mounting rod. The laser monitoring component is a laser radar or an industrial laser scanner.

10. A VAS device, characterized in that: It comprises an air separation body and a stem collection device of the VAS device as described in any one of claims 1-9; the air separation body is provided with at least a tobacco discharge port and a stem discharge port, and the stem collection device of the VAS device is installed below the stem discharge port.

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