Burley tobacco baking machine for laboratory

Abstract

The invention relates to the technical field of tobacco processing equipment, and provides a burley tobacco baking machine for a laboratory. The burley tobacco baking machine for the laboratory comprises a baking tank, a first flow equalizing plate, a steam generator and a circulating fan, wherein an inserting hole is formed in the top of the baking tank; an exhaust hole is formed in the bottom of the baking tank; the first flow equalizing plate is fixedly mounted in the baking tank, the first flow equalizing plate is provided with a flow equalizing cavity, an air supply hole and a plurality of air outlet holes, and the air supply hole and the air outlet holes are communicated with the flow equalizing cavity; a steam outlet of the steam generator is communicated with the air supply hole through an air pipe; and the circulating fan is communicated with the exhaust hole through an air pipe and is communicated with a steam inlet of the steam generator through an air pipe. According to the burley tobacco baking machine for the laboratory, the air supply hole of the first flow equalizing plate is communicated with the steam outlet of the steam generator, so that superheated steam generated by the steam generator can be uniformly dispersed in the baking tank, the heating efficiency and the heating effect of the baking tank are improved, and non-uniform local heating of tobacco leaves or tobacco shreds is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco processing equipment, in particular to a burley tobacco roasting machine for laboratory use. Background Art

[0002] In the process of preparing tobacco leaves or tobacco shreds, most of them need to be heated and baked using a burley tobacco baking machine to reduce the baking time of the tobacco leaves or tobacco shreds and improve the baking efficiency.

[0003] Burley tobacco processing is one of the most critical core technologies for blended cigarettes. The effectiveness of burley tobacco processing directly impacts the flavor and taste of the blended product. The level of burley tobacco processing technology, to a certain extent, measures the technical content and market competitiveness of a blended product. Burley tobacco processing research generally relies on research into the feeding system and curing process. A variety of burley tobacco curing experimental equipment are now available to meet diverse burley tobacco processing technology research needs. Traditional laboratory burley tobacco curing machines consist of a curing bellows and a tobacco conveyor. During the curing process, the tobacco conveyor transports the tobacco to the curing bellows, which deliver hot air to the tobacco to cure it. The tobacco conveyor then transports the cured tobacco away from the bellows. In practice, hot air from the curing bellows is delivered through a connector into the curing jar, rapidly heating the tobacco leaves or cut tobacco within the curing chamber. However, traditional laboratory burley tobacco roasting machines cannot accurately control the temperature and humidity in the roasting chamber, resulting in the tobacco leaves or tobacco being too dry or too wet. In addition, the temperature in the oven is easily affected by the temperature and humidity of the tobacco leaves, resulting in large temperature fluctuations and failing to meet the requirements of precise roasting. Summary of the Invention

[0004] The present application aims to solve at least one of the technical problems existing in the related art. To this end, the present application proposes a laboratory burley tobacco roasting machine to solve the defect that the temperature of the existing laboratory burley tobacco roasting machine cannot be controlled.

[0005] The laboratory burley tobacco roasting machine proposed in the embodiment of the present application includes: A baking jar, wherein the top of the baking jar is provided with a plug hole, and the bottom of the baking jar is provided with an exhaust hole; a first flow equalizing plate, fixedly mounted inside the baking jar, the first flow equalizing plate being provided with a flow equalizing cavity, an air supply hole, and a plurality of air outlet holes, the air supply hole being provided on the top surface of the first flow equalizing plate, the air outlet holes being provided on the bottom surface of the first flow equalizing plate, the air supply holes and the air outlet holes being in communication with the flow equalizing cavity; a steam generator, wherein the steam outlet of the steam generator is connected to the air supply hole through an air pipe, wherein the air pipe between the steam outlet of the steam generator and the air supply hole is passed through the plug hole; A circulation fan is connected to the exhaust hole through an air pipe, and the circulation fan is connected to the steam inlet of the steam generator through the air pipe.

[0006] According to the laboratory burley tobacco roaster of the present invention, the air supply holes of the first flow equalizer plate are connected to the steam outlet of the steam generator, thereby evenly distributing the superheated steam generated by the steam generator within the roasting jar, improving the heating efficiency and effect of the roasting jar and preventing uneven heating of the tobacco leaves or cut tobacco. The circulating fan draws the used superheated steam from the roasting jar back into the steam generator, recycling the heat of the superheated steam and preventing the exhaust of excess superheated steam, thereby reducing the energy consumption of the laboratory burley tobacco roaster.

[0007] According to one embodiment of the present application, the first flow equalizing plate is fixed to the upper portion of the baking tank.

[0008] According to one embodiment of the present application, there are multiple baking cans, the number of the first flow equalizing plates and the circulating fans is set corresponding to the number of the baking cans, and the steam outlet of the steam generator is connected to each of the air supply holes through multiple air pipes.

[0009] According to one embodiment of the present application, a second flow equalizing plate is further included, which is fixedly installed in the baking tank. The second flow equalizing plate is located below the first flow equalizing plate. The second flow equalizing plate is provided with a number of evenly distributed flow equalizing micropores, and the flow equalizing micropores are connected to the air outlet holes above and the exhaust holes below.

[0010] According to one embodiment of the present application, a temperature sensor and a humidity sensor are further included, wherein the temperature sensor and the humidity sensor are both fixed on the baking jar, and the sensing ends of the temperature sensor and the humidity sensor are both extended into the baking jar.

[0011] According to one embodiment of the present application, a steam throttle valve is further included, and the steam throttle valve is installed on the air pipe between the steam outlet of the steam generator and the air supply hole of the first flow equalizing plate.

[0012] According to one embodiment of the present application, a pressure relief valve is further included. A pressure relief hole is provided at the top of the baking jar; and the pressure relief valve is installed at the pressure relief hole.

[0013] According to one embodiment of the present application, a drain valve is further included. A drain hole is provided at the bottom end of the baking jar, and the drain valve is installed at the drain hole.

[0014] According to one embodiment of the present application, it includes a conveyor belt and an infrared moisture monitoring module, the conveyor belt passes through the lower part of the baking tank, the conveyor belt is arranged below the first flow equalizing plate, and the conveyor belt is arranged above the exhaust hole; the infrared moisture monitoring module is used to detect tobacco leaf samples at the discharge port of the conveyor belt.

[0015] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic front view of the structure of a laboratory burley tobacco roasting machine provided by one embodiment of the present invention.

[0018] Figure 2 This is a schematic front view of the internal structure of a laboratory burley tobacco roasting machine provided by one embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the internal structure of a laboratory burley tobacco roasting machine provided in yet another embodiment of the present invention.

[0020] Reference numerals: 1. Baking jar; 2. First flow equalizing plate; 21. Flow equalizing cavity; 22. Air supply hole; 23. Air outlet hole; 3. Steam generator; 4. Circulating fan; 5. Second flow equalizing plate; 51. Flow equalizing micropore; 6. Temperature sensor; 7. Humidity sensor; 8. Steam throttle valve; 9. Infrared moisture monitoring module. DETAILED DESCRIPTION

[0021] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0023] In the description of the embodiments of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed or detachable connections, where fixed connections can include integral connections; they can refer to mechanical or electrical connections; and they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0024] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0026] The following combination Figures 1 to 3 A laboratory Burley tobacco roaster of the present invention is described.

[0027] According to an embodiment of the present application, a laboratory burley tobacco roaster is provided, comprising a roasting tank 1, a first flow equalizing plate 2, a steam generator 3, and a circulating fan 4. The top of the roasting tank 1 is provided with a plug hole, and the bottom of the roasting tank 1 is provided with an exhaust hole; the first flow equalizing plate 2 is fixedly installed inside the roasting tank 1, and the first flow equalizing plate 2 is provided with a flow equalizing cavity 21, an air supply hole 22, and a plurality of air outlet holes 23. The air supply hole 22 is provided on the top surface of the first flow equalizing plate 2, and the air outlet holes 23 are provided on the bottom surface of the first flow equalizing plate 2. The air supply hole 22 and the air outlet hole 23 are connected to the flow equalizing cavity 21; The steam outlet of the steam generator 3 is connected to the air supply hole 22 through an air pipe, wherein the air pipe between the steam outlet of the steam generator 3 and the air supply hole 22 is passed through the plug hole; the circulating fan 4 is connected to the exhaust hole through the air pipe, and the circulating fan 4 is connected to the steam inlet of the steam generator 3 through the air pipe.

[0028] According to the laboratory burley tobacco roaster of the embodiment of the present application, the air supply holes 22 of the first flow equalizer plate 2 are connected to the steam outlet of the steam generator 3, so that the superheated steam generated by the steam generator 3 can be evenly distributed within the roasting pot 1, thereby improving the heating efficiency and effect of the roasting pot 1 and avoiding uneven heating of the tobacco leaves or tobacco shreds. The circulating fan 4 is used to draw the superheated steam from the roasting pot 1 back into the steam generator 3, thereby recycling the heat of the superheated steam, preventing the discharge of superheated steam with a high heat content, and reducing the energy consumption of the laboratory burley tobacco roaster.

[0029] The baking tank 1 is the main part of the laboratory burley tobacco roasting machine. A plug hole is provided on the top of the baking tank 1 for installing an air pipe connected to the steam generator 3; an exhaust hole is provided at the bottom of the baking tank 1 for discharging waste gas generated during the baking process and recycled superheated steam.

[0030] The first equalizing plate 2 is fixedly mounted inside the baking jar 1 and comprises a equalizing cavity 21, air supply holes 22, and several air outlet holes 23. The air supply holes 22 are located on the top surface of the equalizing plate and are connected to the steam outlet of the steam generator 3 via air pipes. The air outlet holes 23 are evenly distributed on the bottom surface of the equalizing plate to ensure that the steam is evenly distributed within the baking jar 1. The equalizing cavity 21 serves as a temporary storage and distribution space for steam, ensuring that the steam reaches a certain pressure and temperature before being supplied.

[0031] The steam generator 3 is used to generate superheated steam. The steam outlet of the steam generator 3 is connected to the air supply hole 22 of the first flow equalizer 2 via an air pipe. The superheated steam generated by the steam generator 3 enters the flow equalizer cavity 21 through the air pipe and is evenly dispersed into the baking pot 1 through the air outlet 23.

[0032] The circulation fan 4 is connected to the exhaust port of the baking tin 1 and the steam inlet of the steam generator 3 via an air pipe, forming a closed-loop circulation system. The circulation fan 4 draws the superheated steam used in the baking tin 1 back into the steam generator 3 for reheating and recycling. This design not only improves steam utilization but also significantly reduces energy consumption.

[0033] It can be understood that through the design of the flow equalizing cavity 21, air supply hole 22 and air outlet hole 23 of the first flow equalizing plate 2, the uniform distribution of steam in the baking pot 1 is achieved, avoiding the problem of uneven local heating of tobacco leaves or tobacco shreds. The uniform distribution and recycling of steam make the baking process more efficient, shorten the baking time, and improve production efficiency.

[0034] According to one embodiment of the present application, the first flow equalizing plate 2 is fixed to the upper portion of the baking tank 1 .

[0035] It will be appreciated that when the first equalizer plate 2 is secured to the top of the baking jar 1, steam enters the equalizer cavity 21 through the air supply holes 22 and is evenly dispersed throughout the baking space through the air outlet holes 23. Because the equalizer plate is located at the top, condensation and accumulation of steam at the bottom or lower areas of the baking jar 1 are reduced, ensuring more effective steam contact with the tobacco leaves or shredded tobacco, improving heating efficiency.

[0036] According to one embodiment of the present application, there are multiple baking cans 1, the number of first flow equalizing plates 2 and circulating fans 4 is set corresponding to the number of baking cans 1, and the steam outlet of the steam generator 3 is connected to each air supply hole 22 through multiple air pipes.

[0037] As will be appreciated, each baking jar 1 is equipped with a socket and an exhaust port for connecting to a steam pipe and exhausting exhaust gases, respectively. Multiple baking jars 1 can operate in parallel, increasing production capacity. A first flow equalizer 2 is fixedly mounted inside each baking jar 1. Each baking jar 1 is equipped with a circulation fan 4, which is connected to the exhaust port of the baking jar 1 and the steam inlet of the steam generator 3 via an air pipe, forming a closed-loop circulation system. The circulation fan 4 draws the superheated steam used in the baking jar 1 back into the steam generator 3 for reheating and recycling.

[0038] The steam outlet of the steam generator 3 is connected to the air supply hole 22 of each baking pot 1 through multiple air pipes. Specifically, multiple air pipes can be connected to the steam outlet of the steam generator 3 through a connecting valve, or the steam generator 3 can be provided with multiple steam outlets, and the air pipes and steam outlets are arranged one by one.

[0039] According to one embodiment of the present application, a second equalizing plate 5 is further included. The second equalizing plate 5 is fixedly installed in the baking tank 1. The second equalizing plate 5 is located below the first equalizing plate 2. The second equalizing plate 5 is provided with a plurality of evenly distributed equalizing micropores 51. The equalizing micropores 51 connect the upper air outlet 23 and the lower exhaust hole.

[0040] The second equalizing plate 5 is fixedly installed inside the baking jar 1, below the first equalizing plate 2. The second equalizing plate 5 is equipped with a number of evenly distributed equalizing micropores 51, which connect the upper air outlet 23 with the lower exhaust vents. Through the equalizing micropores 51, steam is further evenly distributed to the lower areas of the baking jar 1, achieving multi-level uniform heating.

[0041] It can be understood that the evenly distributed flow equalizing micropores 51 on the second flow equalizing plate 5 can be used to redistribute the superheated steam in the baking can 1, thereby improving the heating efficiency and heating effect of the baking can 1 and avoiding uneven local heating of tobacco leaves or tobacco shreds.

[0042] The aperture of the flow-distributing micropore 51 may be the same as the aperture of the air outlet 23 , or the aperture of the flow-distributing micropore 51 may be smaller than the aperture of the air outlet 23 , and no specific limitation is imposed here.

[0043] According to one embodiment of the present application, a temperature sensor 6 and a humidity sensor 7 are further included. Both the temperature sensor 6 and the humidity sensor 7 are fixed on the baking tank 1 , and the sensing ends of the temperature sensor 6 and the humidity sensor 7 extend into the baking tank 1 .

[0044] A temperature sensor 6 is fixed to the baking jar 1, with its sensing end extending into the baking jar 1, for real-time monitoring of temperature changes within the baking jar 1. The temperature sensor 6 transmits the monitored temperature data to the control system in real time, allowing the control system to adjust the heating power of the steam generator 3 according to a preset baking temperature curve.

[0045] A humidity sensor 7 is also fixed to the baking jar 1, with its sensing end extending into the baking jar 1, for real-time monitoring of humidity changes within the baking jar 1. The humidity sensor 7 transmits the monitored humidity data to the control system in real time, allowing the control system to adjust the steam output of the steam generator 3 according to the preset baking humidity requirements.

[0046] It is understood that the temperature and humidity in the baking pot 1 are sensed in real time by the temperature sensor 6 and the humidity sensor 7, so as to ensure that the temperature and humidity in the baking pot 1 are maintained within the set level, thereby preventing the baking tobacco leaves or tobacco from being too dry or too wet. According to one embodiment of the present application, a steam throttle valve 8 is further included, which is installed on the air pipe between the steam outlet of the steam generator 3 and the air supply hole 22 of the first flow equalizing plate 2 .

[0047] The steam throttle valve 8 is used to adjust the steam flow rate entering the baking pot 1. By adjusting the opening of the steam throttle valve 8, precise control of the steam can be achieved. By using the steam throttle valve 8 to control the amount of steam in the baking pot 1, excessive waste of superheated steam can be avoided.

[0048] According to one embodiment of the present application, the laboratory burley tobacco roasting machine further includes a pressure relief valve (not marked in the figure). A pressure relief hole is provided at the top of the roasting tank 1; and the pressure relief valve is installed at the pressure relief hole.

[0049] It is understandable that, by installing the pressure relief valve at the pressure relief hole on the top of the baking jar 1 , when the pressure in the baking jar 1 is too high, the pressure relief valve can be opened to avoid danger.

[0050] According to one embodiment of the present application, a drain valve (not marked in the figure) is further included. A drain hole is provided at the bottom end of the baking jar 1, and the drain valve is installed at the drain hole.

[0051] It is understood that the drain valve is used to automatically drain the condensed water generated during the baking process. The drain valve can be set to manual or automatic control as needed to ensure that the condensed water can be drained in time to avoid affecting the baking quality.

[0052] According to one embodiment of the present application, a laboratory burley tobacco roasting machine includes a conveyor belt and an infrared moisture monitoring module 9. The conveyor belt runs through the lower part of the roasting tank 1, is arranged below the first flow equalizing plate 2, and is arranged above the exhaust hole; the infrared moisture monitoring module 9 is used to detect tobacco leaf samples at the discharge port of the conveyor belt.

[0053] It is understood that the infrared moisture monitoring module 9 can detect the moisture content of the tobacco leaves or shredded tobacco after baking. Specifically, the moisture data of the tobacco leaf samples at the discharge port can be recorded at regular intervals and transmitted to the controller. The controller is set with a target moisture value for the tobacco leaf samples. By comparing the moisture data with the target moisture value, the power of the steam generator can be adjusted in real time, thereby ensuring that the subsequent tobacco leaves can obtain the appropriate baking humidity, thereby improving the heating efficiency and heating effect of the baking tank, avoiding uneven heating of the tobacco leaves or shredded tobacco, and improving the quality of the tobacco leaves produced.

[0054] Among them, if the moisture data of the tobacco leaf sample is lower than the target moisture value, the power of the steam generator 3 is controlled to increase, the amount of steam generated is increased, and the steam temperature is increased; if the moisture data of the tobacco leaf sample is equal to the target moisture value, the power of the steam generator 3 is controlled to remain unchanged; if the moisture data of the tobacco leaf sample is higher than the target moisture value, the power of the steam generator 3 is controlled to decrease, the amount of steam generated is reduced, and the steam temperature is lowered.

[0055] It should be noted that if Figure 3As shown, the infrared moisture monitoring module 9 is connected to the baking jar 1 and is located above the conveyor belt. In addition to the above implementation, the infrared moisture monitoring module 9 can also be located at other locations, as long as the monitoring range of the infrared moisture monitoring module 9 is located at the conveyor belt outlet.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A laboratory burley tobacco roasting machine, characterized in that: include: A baking jar (1), wherein a plug hole is provided on the top of the baking jar (1), and an exhaust hole is provided on the bottom of the baking jar (1); a first flow equalizing plate (2) fixedly mounted inside the baking jar (1), the first flow equalizing plate (2) being provided with a flow equalizing cavity (21), an air supply hole (22) and a plurality of air outlet holes (23), the air supply hole (22) being provided on the top surface of the first flow equalizing plate (2), the air outlet holes (23) being provided on the bottom surface of the first flow equalizing plate (2), the air supply hole (22) and the air outlet holes (23) being in communication with the flow equalizing cavity (21); A steam generator (3), wherein the steam outlet of the steam generator (3) is connected to the air supply hole (22) via an air pipe, wherein the air pipe between the steam outlet of the steam generator (3) and the air supply hole (22) is passed through the plug hole; A circulating fan (4), the circulating fan (4) is connected to the exhaust hole through an air pipe, and the circulating fan (4) is connected to the steam inlet of the steam generator (3) through the air pipe.

2. The laboratory burley tobacco roasting machine according to claim 1, characterized in that The first flow equalizing plate (2) is fixed to the upper part of the baking pot (1).

3. The laboratory burley tobacco roasting machine according to claim 1, characterized in that There are a plurality of baking jars (1), the first flow equalizing plates (2) and the circulating fans (4) are arranged in a number corresponding to the number of the baking jars (1), and the steam outlet of the steam generator (3) is connected to each of the air supply holes (22) through a plurality of air pipes.

4. The laboratory burley tobacco roasting machine according to claim 1, characterized in that The baking pot (1) further comprises a second flow equalizing plate (5), the second flow equalizing plate (5) being fixedly mounted in the baking pot (1), the second flow equalizing plate (5) being located below the first flow equalizing plate (2), the second flow equalizing plate (5) being provided with a plurality of evenly distributed flow equalizing micropores (51), the flow equalizing micropores (51) being connected to the air outlet (23) above and the air exhaust hole below.

5. The laboratory burley tobacco roasting machine according to claim 1, characterized in that: The invention also comprises a temperature sensor (6) and a humidity sensor (7), wherein the temperature sensor (6) and the humidity sensor (7) are both fixed on the baking jar (1), and the sensing end of the temperature sensor (6) and the sensing end of the humidity sensor (7) are both extended into the baking jar (1).

6. The laboratory burley tobacco roasting machine according to claim 1, characterized in that: It also includes a steam throttle valve (8), which is installed on the air pipe between the steam outlet of the steam generator (3) and the air supply hole (22) of the first flow equalizing plate (2).

7. The laboratory burley tobacco roasting machine according to claim 1, characterized in that: It also includes a pressure relief valve, and a pressure relief hole is provided at the top of the baking jar (1); the pressure relief valve is installed at the pressure relief hole.

8. The laboratory burley tobacco roasting machine according to claim 1, characterized in that The baking jar (1) further comprises a drainage valve. A drainage hole is provided at the bottom end of the baking jar (1), and the drainage valve is installed at the drainage hole.

9. The laboratory burley tobacco roasting machine according to claim 1, characterized in that: The invention comprises a conveyor belt and an infrared moisture monitoring module (9), wherein the conveyor belt passes through the lower part of the baking tank (1), the conveyor belt is arranged below the first flow equalizing plate (2), and the conveyor belt is arranged above the exhaust hole; the infrared moisture monitoring module (9) is used to detect tobacco leaf samples at the discharge port of the conveyor belt.

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