Tobacco material moisture detection equipment and method based on optical infrared technology

Abstract

The invention discloses tobacco material moisture detection equipment based on an optical infrared technology and a method thereof.The tobacco material moisture detection equipment comprises a machine case, a sunken inner container is installed in the machine case, a ventilation tray is installed at one end in the sunken inner container, a double-side-belt leakage-proof conveying assembly is installed on one side of the top end of the machine case, and a double-side-belt leakage-proof conveying assembly is installed on the other side of the top end of the machine case; a double-shaft adjustable front spreading assembly is arranged in the end, away from the machine box, of the double-side-belt leakage-proof conveying assembly. The double-side-belt leakage-proof conveying assembly conveys the same batch of tobacco materials to the infrared moisture meter, the tobacco materials are flattened and homogenized through the double-shaft adjustable front spreading assembly in the conveying process, the tobacco materials detected by the infrared moisture meter are conveyed into the sunken inner container, and if the detected moisture value is high, the tobacco materials are conveyed into the sunken inner container. The air-heat type drying assembly conducts hot air drying, and the material stirring type comb tooth uniform distribution assembly continuously stirs the tobacco materials in the sinking type inner container till moisture detection of the batch of tobacco materials and drying operation after detection are completed.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco material production, in particular to tobacco material moisture detection equipment and method based on optical infrared technology. Background Art

[0002] The tobacco material moisture detection equipment based on optical infrared technology uses non-contact optical measurement technology to conduct real-time, continuous and dynamic monitoring of tobacco materials on the production line to ensure product processing quality and process stability. The equipment emits a light beam to the surface of the material through an infrared light source of a specific wavelength, and uses the selective absorption characteristics of water molecules to a specific infrared spectrum, combined with the analysis and calculation of the reflected light intensity attenuation degree and the preset material model, to quickly obtain real-time moisture content data, and transmit the results to the control system synchronously, providing instant feedback for the automated adjustment of process links such as drying and feeding. The structure of this type of equipment consists of an optical sensor module, a signal processing unit, a mechanical support system and an environmental adaptation component. The optical system captures the material reflection signal through a precision lens group and a high-sensitivity detector, and the signal processing unit uses an algorithm model to convert the light signal into a moisture value, while the dustproof, shock-absorbing and protective shell design ensures that the equipment can operate reliably in the complex environment of high dust and high vibration in tobacco production;

[0003] As disclosed in the authorization announcement number CN220040249U, a tobacco material moisture detection device comprises a frame, a base and an infrared instrument body; the frame is a strip-shaped trough structure with a hollow interior, and a base that can slide along the strip length direction of the frame is provided on the outside of the frame; the base is a frame structure, and a slide block is arranged in the base of the frame structure, and the slide block extends out of the first slide groove of the side wall of the frame and is connected to the inner wall of the base, and the slide block is provided with a mounting through hole; a slide rod is provided in the frame, and the slide block is slidably mounted on the slide rod through the mounting through hole, which is used for supporting and slidingly guiding the base; the infrared instrument body is installed on the outer wall of the base and slides with the base. It utilizes the base of the frame structure to be mounted on the frame of the trough structure, and a slide rod is provided inside the frame to slide with the slide block of the base, which greatly strengthens the base on the frame. The sliding stability on the surface can effectively improve the stability of the moving scanning of the infrared instrument main body arranged on the base. However, the above technical solution needs to be integrated on the production line during use. The tobacco materials sent from the previous production process to the infrared instrument are often piled up too thickly. The overly thick piled materials will cause the infrared light to be scattered, absorbed or even completely blocked when penetrating multiple layers of materials, causing signal weakening or distortion, thereby making the measurement result deviate from the actual moisture content. In addition, if the moisture content of the tobacco material is too high after the test is completed, it is also necessary to carry out drying treatment separately. At this time, the material needs to be transferred to an independent drying equipment. If the drying equipment is located downstream of the detection point or at a physical distance that is too far, the material exceeding the standard needs to be recycled, resulting in redundant processes, which not only increases time costs, but also may cause damage to the physical properties of the material. Summary of the Invention

[0004] The purpose of the present invention is to provide a tobacco material moisture detection device and method based on optical infrared technology. The double-sided belt leakage-proof conveying assembly conveys the same batch of tobacco materials to the infrared moisture meter. During the conveying process, the double-shaft adjustable front laying assembly flattens and equalizes the tobacco materials. After being detected by the infrared moisture meter, the tobacco materials are sent into the sunken inner tank. If the detected water content value is high, the hot air drying component of the hot air type performs hot air drying. While drying, the feeding type comb tooth uniform distribution assembly continuously stirs the tobacco materials in the sunken inner tank until the moisture detection and drying operation after detection of this batch of tobacco materials are completed, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A tobacco material moisture detection device based on optical infrared technology, including:

[0006] A chassis, inside which a sunken inner tank is installed, and a ventilation tray is installed at one end inside the sunken inner tank. On one side of the top of the chassis, a double-sided belt leakage-proof conveying assembly is installed. Inside one end of the double-sided belt leakage-proof conveying assembly away from the chassis, a double-shaft adjustable front laying assembly is provided. On one side of the top of the chassis, two symmetric infrared moisture meters are installed through a U-shaped frame. Tobacco materials sequentially pass through the double-shaft adjustable front laying assembly, the infrared moisture meter and enter the sunken inner tank;

[0007] A hot air drying component of the hot air type, which is installed at the bottom of the sunken inner tank. On one side of the top of the ventilation tray, a feeding type comb tooth uniform distribution assembly is installed. A belt drive structure for maintaining power connection is installed between the feeding type comb tooth uniform distribution assembly and the double-sided belt leakage-proof conveying assembly. On one side of the surface of the chassis, a PLC control panel is installed. The output ends of the PLC control panel are respectively electrically connected to the input ends of the double-sided belt leakage-proof conveying assembly, the double-shaft adjustable front laying assembly, and the hot air drying component of the hot air type. The output end of the infrared moisture meter is electrically connected to the input end of the PLC control panel.

[0008] Preferably, the double-sided belt leakage-proof conveying assembly includes a rectangular steel structure frame fixed on one side of the top of the chassis, a front support shaft and a rear support shaft respectively rotatably installed at both edge positions on both sides of the top of the rectangular steel structure frame through bearing seats, and belt rollers fixed at both ends of the surfaces of the front support shaft and the rear support shaft. A multi-groove belt is sleeved between the two belt rollers in the same X-axis direction. The double-shaft adjustable front laying assembly is installed inside the rectangular steel structure frame. The rear support shaft drives the feeding type comb tooth uniform distribution assembly to work through a belt drive structure. A reduction motor for driving the rear support shaft to rotate is installed on one outer wall of the chassis. A slope is installed at the top of one side of the ventilation tray close to the rear support shaft.

[0009] Preferably, right-angle brackets are welded at the front and rear edge positions of the top end of the square steel structure framework, and upturned edges are integrally formed at the front and rear edge positions of the top end of the right-angle brackets.

[0010] Preferably, the double-axis adjustable front feeding assembly includes an H-shaped horizontal frame fixed inside the square steel structure framework, a double-rod cylinder installed on the inner wall of one side of the H-shaped horizontal frame, a top plate fixed to the top end of the piston rod of the double-rod cylinder, and T-shaped arms symmetrically installed on both sides of the top end of the top plate. The top ends of the T-shaped arms extend upward and pass through between two multi-grooved belts. A number of evenly spaced spreading rakes are installed on the outer walls of the two T-shaped arms facing away from each other.

[0011] Preferably, right-angle seats are installed on both sides of the top end of the top plate, and a Y-axis cylinder is installed on the outer wall of one side of the right-angle seat. The top end of the piston rod of the Y-axis cylinder is fixedly connected to the outer wall of one side of the T-shaped arm.

[0012] Preferably, the hot-air drying assembly includes a number of flat electric heating tubes installed at the bottom of the sunken inner tank and a blower installed at the center position of the bottom end of the sunken inner tank. The hot-air drying assembly also includes a thermocouple installed on the inner wall of the machine box above the ventilation tray. The output end of the thermocouple is electrically connected to the input end of the PLC control panel. The flat electric heating tubes are located below the ventilation tray.

[0013] Preferably, the material-pushing type evenly distributed comb teeth assembly includes two axle-mounted frames fixed to one side of the top end of the ventilation tray, a C-port vertical frame installed on the outer wall of the axle-mounted frame close to the slope path, and a transmission shaft rotatably installed between the two C-port vertical frames. A crank connecting rod material-pushing structure is installed on the outer wall of one of the axle-mounted frames. A cage-type material-returning structure is installed between the two axle-mounted frames below the crank connecting rod material-pushing structure. A sprocket transmission group for power connection of the transmission shaft, the crank connecting rod material-pushing structure, and the cage-type material-returning structure is installed on the outer wall of one of the axle-mounted frames. Power is transmitted between one end of the transmission shaft and one end of the rear support shaft through a belt transmission structure.

[0014] Preferably, the crank connecting rod material-pushing structure includes a protective shell fixed to the front and rear outer walls of the axle-mounted frame, a convex edge, a lower swing arm hinged to the outer wall of one side of the protective shell, and a short shaft rotatably installed on the outer wall of one of the axle-mounted frames. A crank body is fixed to one end of the short shaft. A fisheye-shaped pull arm is hinged to one end of the surface of the crank body. The bottom end of the fisheye-shaped pull arm is hinged to the top end of the lower swing arm. A material-pushing rake is fixed between two adjacent lower swing arms.

[0015] Preferably, the cage-type material return structure includes a tail shaft rotatably installed on the outer walls of the opposite sides of the two axle carriers, a disc fixed to one end of the tail shaft, and a plurality of bent ribs annularly and equally spaced between the opposite outer walls of the two discs. The sprocket transmission group includes a double-sprocket transmission structure installed between the transmission shaft and the short shaft, and a triple-sprocket transmission structure for connecting the short shaft and the tail shaft.

[0016] The present invention also provides a method for detecting the moisture content of tobacco materials using optical infrared technology. For the tobacco material moisture detection device using optical infrared technology as described above, it includes the following steps:

[0017] S101: Set process parameters through the PLC control panel, including the conveying speed of the double-side belt leak-proof conveying assembly, the paving thickness of the double-shaft adjustable front paving assembly, the target moisture threshold of the infrared moisture meter, and the working temperature and wind speed of the wind-heat type drying component. After confirming that the feedback signals of each assembly component are normal, enter the working state;

[0018] S102: Put the tobacco material to be inspected onto the double-side belt leak-proof conveying assembly. The double-side belt leak-proof conveying assembly conveys the tobacco material to be detected from storage or the previous process to the detection area where the infrared moisture meter is located. During the conveying process, the double-shaft adjustable front paving assembly adjusts according to the preset parameters, spreads the tobacco material on the double-side belt leak-proof conveying assembly to form a uniform material layer. The infrared moisture meter measures the moisture content in the material by emitting infrared rays, and the data is transmitted to the PLC control panel in real time;

[0019] S103: The tobacco material after detection is sent into the sunken inner container, and the ventilation tray supports the tobacco material. The PLC control panel judges whether drying treatment is required according to the moisture detection result. If the moisture is too high, the PLC control panel issues an instruction and starts the wind-heat type drying component. The ventilation tray cooperates with the wind-heat type drying component to provide a stable hot air flow to help the tobacco material quickly and evenly evaporate the excess moisture. And a part of the rotary power of the double-side belt leak-proof conveying assembly will be synchronously transmitted to the dial-type comb teeth evenly distributed assembly through the belt transmission structure. The sawtooth structure of the dial-type comb teeth evenly distributed assembly flips the material layer in a periodic reciprocating motion to ensure the drying uniformity;

[0020] S104: After drying is completed, the staff stops the operation of the wind-heat type drying component and the double-side belt leak-proof conveying assembly through the PLC control panel, and transfers the dried tobacco material in the sunken inner container to the next process or the storage area.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: The tobacco material moisture detection device and method based on optical infrared technology are provided with structures such as a double-sided belt anti-leakage conveying assembly, a double-axis adjustable front feeding assembly, an infrared moisture meter, a sunken inner liner, a ventilation tray, a hot air type drying component, and a feeding type comb tooth uniform distribution assembly, etc., which cooperate with each other. The double-sided belt anti-leakage conveying assembly conveys the same batch of tobacco materials to the infrared moisture meter. During the conveying process, the double-axis adjustable front feeding assembly flattens and equalizes the tobacco materials. The tobacco materials after being detected by the infrared moisture meter are sent into the sunken inner liner. If the detected water content value is high, the hot air type drying component performs hot air drying. While drying, the feeding type comb tooth uniform distribution assembly continuously stirs the tobacco materials in the sunken inner liner until the moisture detection and post-detection drying operations of this batch of tobacco materials are completed. Among them, the double-sided belt anti-leakage conveying assembly and the double-axis adjustable front feeding assembly can adjust the paving intensity according to the material characteristics (such as fiber length, moisture content), which can not only avoid over-compacting and damaging the material structure, but also eliminate the problems of excessive stacking or uneven distribution, realizing the flattening and equalization of tobacco materials. The evenly distributed thin-layer materials enable the infrared light to fully penetrate the surface layer, significantly improving the consistency of the detection depth, reducing the optical signal interference caused by local stacking or voids, and ensuring that the data obtained by the moisture meter truly reflects the average moisture state of the whole batch of materials.

[0022] Secondly, as the temporary storage and processing unit for the materials after detection, the sunken inner liner's "detection - temporary storage - drying" integrated design eliminates the time delay and secondary pollution risks brought by material transfer in the traditional process. That is, after the infrared moisture meter completes the on-line detection, the materials directly fall into the sunken inner liner, and the PLC control panel immediately triggers the subsequent operations according to the real-time moisture data of the infrared moisture meter: If the moisture exceeds the standard, the hot air type drying component is immediately started, without manual intervention or external equipment scheduling, greatly shortening the process response time. The hot air type drying component and the ventilation tray cooperate to form porous air supply. When the hot air flow penetrates the material layer, uniform heat exchange can be realized, avoiding local overheating or insufficient drying, and combined with the periodic turning of the feeding type comb tooth uniform distribution assembly, the materials in the sunken inner liner are continuously loosened and reorganized, fully exposing the wet areas, breaking up the lumps and accelerating the moisture evaporation, thus forming a synergistic effect of "dynamic turning + directional air supply", synchronously improving the drying efficiency and uniformity, especially suitable for the rapid correction of high-moisture materials.

[0023] Finally, from the front-end conveying, paving to the mid-section detection and later drying, the same batch of materials is always in a closed processing flow, avoiding multi-batch mixing or cross-contamination, enabling the entire process to operate efficiently, stably and reliably. It not only ensures that the moisture of each batch of tobacco is controlled within a reasonable range, but also reduces the subsequent quality problems caused by moisture deviation. Description of the Drawings

[0024] Figure 1Schematic diagram of the front view sectional structure of the present invention;

[0025] Figure 2 Schematic diagram of the three-dimensional sectional structure of the present invention;

[0026] Figure 3 Schematic diagram of the three-dimensional structure of the present invention Figure 1 ;

[0027] Figure 4 Schematic diagram of the three-dimensional structure of the present invention Figure 2 ;

[0028] Figure 5 Schematic diagram of the upper and lower isometric axonometric three-dimensional structure of the present invention;

[0029] Figure 6 Schematic diagram of the three-dimensional structure of the present invention Figure 3 ;

[0030] Figure 7 Schematic diagram of the three-dimensional structure of the overall double-sided belt leak-proof conveying of the second embodiment of the present invention;

[0031] Figure 8 Schematic diagram of the three-dimensional structure of the overall double-axis adjustable front feeding of the second embodiment of the present invention;

[0032] Figure 9 Schematic diagram of the three-dimensional structure of the overall material-pushing type comb teeth evenly distributed of the third embodiment of the present invention;

[0033] Figure 10 Schematic diagram of the three-dimensional sectional structure of the overall material-pushing type comb teeth evenly distributed of the third embodiment of the present invention;

[0034] Figure 11 Schematic diagram of the three-dimensional structure of the crank connecting rod material-pushing structure of the third embodiment of the present invention;

[0035] Figure 12 Schematic diagram of the three-dimensional structure of the cage-type material return structure of the third embodiment of the present invention.

[0036] In the figure: 1. Chassis; 101. Ramp road; 2. Round steel structure skeleton; 201. Right angle frame; 202. Upturned edge; 3. Double-sided belt leak-proof conveying assembly; 301. Front support shaft; 302. Rear support shaft; 303. Belt roller; 304. Multi-groove belt; 4. Double-axis adjustable front material laying assembly; 401. Japanese-shaped horizontal frame; 402. Double-rod cylinder; 403. Top plate; 4031. Right angle seat; 4032. Y-axis cylinder; 404. T-arm; 405. Material spreading rake; 5. Infrared moisture meter; 6. Sunken liner; 601. Ventilated tray; 7. Material-digging comb tooth uniform distribution assembly; 701. Axle carrier; 7011. Protective shell; 701 2. Convex edge; 702. C-mouth frame; 703. Drive shaft; 704. Crank-connecting rod material shifting structure; 7041. Short shaft; 7042. Crank body; 7043. Lower arm; 7044. Fisheye pull arm; 7045. Material shifting rake; 705. Sprocket drive group; 7051. Double sprocket drive structure; 7052. Three sprocket drive structure; 706. Cage type material return structure; 7061. Tail shaft; 7062. Disc; 7063. Bending rib; 8. Belt drive structure; 9. Gear motor; 10. PLC control panel; 11. Air-heat drying component; 1101. Flat electric heating tube; 1102. Fan; 1103. Thermocouple. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1, by Figures 1 to 6 The present invention comprises a chassis 1, a sunken liner 6 is installed inside the chassis 1, and a ventilation tray 601 is installed at one end of the sunken liner 6, a double-side belt leak-proof conveying assembly 3 is installed on one side of the top of the chassis 1, a double-side belt leak-proof conveying assembly 3 is arranged inside one end away from the chassis 1, and a double-axis adjustable front material laying assembly 4 is arranged inside one side of the top of the chassis 1 through a U-shaped frame, and two symmetrical infrared moisture meters 5 are installed on one side of the top of the chassis 1, and tobacco materials pass through the double-axis adjustable front material laying assembly 4 and the infrared moisture meter 5 in sequence and enter the sunken liner 6;

[0039] The hot-wind type drying component 11 is installed at the bottom end of the sunken inner tank 6. On one side of the top end of the ventilation tray 601, a feeding type comb tooth evenly distributed assembly 7 is installed. A belt transmission structure 8 for maintaining power connection is installed between the feeding type comb tooth evenly distributed assembly 7 and the double-sided belt anti-leakage conveying assembly 3. On one side of the surface of the machine case 1, a PLC control panel 10 is installed. The output ends of the PLC control panel 10 are electrically connected to the input ends of the double-sided belt anti-leakage conveying assembly 3, the double-shaft adjustable front laying assembly 4, and the hot-wind type drying component 11 respectively. The output end of the infrared moisture meter 5 is electrically connected to the input end of the PLC control panel 10;

[0040] The tobacco material moisture detection method based on optical infrared technology in this embodiment, like the tobacco material moisture detection equipment based on optical infrared technology described above, includes the following steps:

[0041] S101: Set process parameters through the PLC control panel 10, including the conveying speed of the double-sided belt anti-leakage conveying assembly 3, the paving thickness of the double-shaft adjustable front laying assembly 4, the target moisture threshold of the infrared moisture meter 5, and the working temperature and wind speed of the hot-wind type drying component 11. After confirming that the feedback signals of each assembly component are normal, enter the working state;

[0042] S102: Put the tobacco material to be detected on the double-sided belt anti-leakage conveying assembly 3. The double-sided belt anti-leakage conveying assembly 3 conveys the tobacco material to be detected from storage or the previous process to the detection area where the infrared moisture meter 5 is located. During the conveying process, the double-shaft adjustable front laying assembly 4 is adjusted according to the preset parameters, and the tobacco material is paved on the double-sided belt anti-leakage conveying assembly 3 to form a uniform material layer. The infrared moisture meter 5 measures the moisture content in the material by emitting infrared rays, and the data is transmitted to the PLC control panel 10 in real time;

[0043] S103: The tobacco material after detection is sent into the sunken inner tank 6, and the ventilation tray 601 supports the tobacco material. The PLC control panel 10 judges whether drying treatment is required according to the moisture detection result. If the moisture is too high, the PLC control panel 10 issues an instruction and starts the hot-wind type drying component 11. The ventilation tray 601 cooperates with the hot-wind type drying component 11 to provide a stable hot air flow to help the tobacco material quickly and evenly evaporate the excess moisture. And a part of the rotary power of the double-sided belt anti-leakage conveying assembly 3 will be synchronously transmitted to the feeding type comb tooth evenly distributed assembly 7 through the belt transmission structure 8. The sawtooth structure of the feeding type comb tooth evenly distributed assembly 7 flips the material layer in a periodic reciprocating motion to ensure the drying uniformity;

[0044] S104: After drying is completed, the staff stops the hot-wind type drying component 11 and the double-sided belt anti-leakage conveying assembly 3 through the PLC control panel 10, and transfers the dried tobacco material in the sunken inner tank 6 to the next process or storage area.

[0045] The staff can install an infrared moisture meter 5 and a moisture meter on the top of the chassis 1 above the sunken inner liner 6. The model of the moisture meter is GMK-3306. The detection probe of the moisture meter is inserted into the tobacco material pile of the sunken inner liner 6, so that during the drying process, the instrument continuously samples and re-inspects the material in the sunken inner liner 6. The collected moisture data is fed back to the PLC control panel 10 in real time. If the moisture drops slowly, the hot air temperature of the air-heat drying component 11 is gradually increased or the drying time is extended. If it is close to the target value, it is switched to a low-temperature slow drying state to avoid over-drying.

[0046] Embodiment 2, based on embodiment 1, Figure 7 and Figure 8 It is given that the double-sided belt leak-proof conveying assembly 3 includes a circular steel structure frame 2 fixed to one side of the top of the chassis 1, a front support shaft 301 and a rear support shaft 302 rotatably installed at the edges of the top of the circular steel structure frame 2 through bearing seats, and belt rollers 303 fixed at both ends of the surfaces of the front support shaft 301 and the rear support shaft 302, a multi-groove belt 304 is set between the two belt rollers 303 in the same X-axis direction, a double-axis adjustable front paving assembly 4 is installed inside the circular steel structure frame 2, and the rear support shaft 302 is driven by a belt structure. 8 drives the material-dividing comb-tooth uniform distribution assembly 7 to work, a reduction motor 9 for driving the rear support shaft 302 to rotate is installed on one side outer wall of the chassis 1, and a ramp 101 is installed on the top of one side of the ventilation tray 601 close to the rear support shaft 302. When the double-sided belt leak-proof conveying assembly 3 is working, the staff turns on the reduction motor 9 through the PLC control panel 10 to work, and the reduction motor 9 drives the rear support shaft 302 and the belt roller 303 to rotate, and the multi-groove belt 304 between the two belt rollers 303 in the X-axis direction is used to transfer the tobacco material to move;

[0047] A right angle frame 201 is welded at the front and rear edges of the top of the circular steel structure frame 2, and an upward warping edge 202 is integrally formed at the front and rear edges of the top of the right angle frame 201. The upward warping edge 202 at the front and rear edges of the top of the right angle frame 201 is used to form a shield on the moving path of the tobacco material to limit the flow range of the material and prevent the edge from scattering due to vibration or speed change, which is suitable for directional transportation of fluffy tobacco materials.

[0048] The double-axis adjustable front laying assembly 4 includes a rectangular horizontal frame 401 fixed inside the rectangular steel structure framework 2, a double-rod cylinder 402 installed on the inner wall of one side of the rectangular horizontal frame 401, a top plate 403 fixed to the top end of the piston rod of the double-rod cylinder 402, and T-shaped arms 404 symmetrically installed on both sides of the top end of the top plate 403. The top ends of the T-shaped arms 404 extend upward and pass through between two multi-grooved belts 304. A number of equally spaced spreading rakes 405 are installed on the outer walls of the two T-shaped arms 404 on the sides away from each other. When using the double-axis adjustable front laying assembly 4 to actively level the tobacco material on the multi-grooved belt 304, the staff controls the double-rod cylinder 402 to work through the PLC control panel 10. The double-rod cylinder 402 drives the top plate 403, the T-shaped arms 404, and the spreading rakes 405 to lift and lower, so as to adjust the distance between the claw ends of the spreading rakes 405 and the multi-grooved belt 304. When the spreading rakes 405 contact the tobacco material, they adapt to the surface undulations, which not only avoids over-compacting and damaging the structure, but also can evenly spread the thick-layer material to an appropriate thickness range for detection;

[0049] Right-angle seats 4031 are installed on both sides of the top end of the top plate 403. A Y-axis cylinder 4032 is installed on the outer wall of one side of the right-angle seat 4031. The top end of the piston rod of the Y-axis cylinder 4032 is fixedly connected to the outer wall of one side of the T-shaped arm 404. The Y-axis cylinder 4032 drives the T-shaped arm 404 and the spreading rake 405 to move in the Y-axis direction to control the Y-axis position of the spreading rake 405. Through the double-axis regulation design of the spreading rake 405, the equipment can adjust the laying width and thickness according to the material characteristics and process requirements, so as to achieve uniform laying and precise control.

[0050] Embodiment 3, on the basis of Embodiment 2, is given by Figure 9 、 Figure 10 、 Figure 11 and Figure 12 The hot-air type drying component 11 includes a number of flat electric heating tubes 1101 installed at the bottom of the sunken inner tank 6 and a blower 1102 installed at the center position of the bottom end of the sunken inner tank 6. The hot-air type drying component 11 also includes a thermocouple 1103 installed on the inner wall of the machine case 1 above the ventilation tray 601. The output end of the thermocouple 1103 is electrically connected to the input end of the PLC control panel 10. The flat electric heating tubes 1101 are located below the ventilation tray 601. When the tobacco material enters the sunken inner tank 6, the PLC control panel 10 controls whether the hot-air type drying component 11 works according to the feedback data of the infrared moisture meter 5. When the hot-air type drying component 11 works, the flat electric heating tubes 1101 and the blower 1102 are started, and the blower 1102 blows hot air towards the ventilation tray 601. At this time, the hot air blows into the tobacco material through the holes. During this process, the thermocouple 1103 continuously monitors the temperature in the sunken inner tank 6 to ensure that the hot air temperature is always within the material tolerance threshold, reducing the phenomenon of coking or aroma loss;

[0051] The material feeding type evenly distributed comb tooth assembly 7 includes two axle carriers 701 fixed on one side of the top end of the ventilation tray 601. On the outer wall of one side of the axle carrier 701 close to the slope track 101, a C-port vertical frame 702 is installed, and a transmission shaft 703 is rotatably installed between the two C-port vertical frames 702. On the outer wall of one side of one of the axle carriers 701, a crank connecting rod material feeding structure 704 is installed. Between the two axle carriers 701 below the crank connecting rod material feeding structure 704, a cage type material returning structure 706 is installed. On the outer wall of one of the axle carriers 701, a sprocket transmission group 705 for power connection of the transmission shaft 703, the crank connecting rod material feeding structure 704, and the cage type material returning structure 706 is installed. Power is transmitted between one end of the transmission shaft 703 and one end of the rear support shaft 302 through a belt transmission structure 8. During the process of the hot air type drying component 11 drying tobacco materials, the transmission shaft 703 always receives the rotary power from the rear support shaft 302 through the belt transmission structure 8. Then, the transmission shaft 703 drives the crank connecting rod material feeding structure 704 and the cage type material returning structure 706 to work through the sprocket transmission group 705. The crank connecting rod material feeding structure 704 inserts into the material layer at a specific frequency and stroke, disperses the adhered tobacco leaves through reciprocating motion, forcibly exposes the internal wet areas, separates the agglomerated materials while maintaining the fiber integrity, avoids crushing loss, and promotes the maximization of the contact area between hot air and materials during the turning process, accelerates water evaporation, and shortens the drying cycle. The cage type material returning structure 706 returns the removed tobacco materials back to the crank connecting rod material feeding structure 704 to ensure uniform circulation of materials and avoid unilateral accumulation of materials;

[0052] The crank connecting rod material feeding structure 704 includes protective shells 7011 and convex edges 7012 fixed on the front and rear outer walls of the axle carrier 701, a lower swing arm 7043 hinged on the outer wall of one side of the protective shell 7011, and a short shaft 7041 rotatably installed on the outer wall of one side of one of the axle carriers 701. One end of the short shaft 7041 is fixed with a crank body 7042. One end of the surface of the crank body 7042 is hinged with a fish-eye type pull arm 7044. The bottom end of the fish-eye type pull arm 7044 is hinged with the top end of the lower swing arm 7043. A material feeding rake 7045 is fixed between adjacent two lower swing arms 7043. The rotary power of the transmission shaft 703 is transmitted to the short shaft 7041 through the sprocket transmission group 705. The short shaft 7041 drives the crank body 7042 to rotate. Then, the rotary motion of the crank body 7042 is converted into the reciprocating up and down yawing actions of the lower swing arm 7043 and the material feeding rake 7045 through the fish-eye type pull arm 7044. Then, the material feeding rake 7045 continuously stirs the tobacco materials to avoid problems such as local accumulation or uneven material stacking;

[0053] The cage-type return material structure 706 includes a tail shaft 7061 rotatably installed on the outer walls of the opposite sides of two axle carriers 701, a disc 7062 fixed to one end of the tail shaft 7061, and a number of bent ribs 7063 annularly and equidistantly arrayed between the opposite outer walls of the two discs 7062. The sprocket drive group 705 includes a double sprocket drive structure 7051 installed between the drive shaft 703 and the short shaft 7041, and a triple sprocket drive structure 7052 for connecting the short shaft 7041 and the tail shaft 7061. The drive shaft 703 drives the short shaft 7041 to rotate through the double sprocket drive structure 7051, and the short shaft 7041 drives the tail shaft 7061 and the disc 7062 to rotate by means of the triple sprocket drive structure 7052. At this time, a number of bent ribs 7063 between the two discs 7062 in the Y-axis direction revolve around the tail shaft 7061 to send the separated tobacco materials back to the material pushing rake 7045 again.

[0054] When the embodiment of the present application is in use, first, the staff set process parameters through the PLC control panel 10, including the conveying speed of the double-sided belt leak-proof conveying assembly 3, the paving thickness of the double-shaft adjustable front paving assembly 4, the target moisture threshold of the infrared moisture meter 5, and the working temperature and wind speed of the hot wind type drying assembly 11. After confirming that the feedback signals of each assembly component are normal, it enters the working state; the staff put the tobacco material to be inspected onto the double-sided belt leak-proof conveying assembly 3, and the double-sided shielding parts of the double-sided belt leak-proof conveying assembly 3 restrict the material flow direction to prevent edge scattering, so as to convey the tobacco material to be detected from storage or the previous process to the detection area where the infrared moisture meter 5 is located. During the conveying process, the double-shaft adjustable front paving assembly 4 is adjusted according to the preset parameters to spread the tobacco material on the double-sided belt leak-proof conveying assembly 3 to form a uniform material layer, so as to ensure that the material is paved flat and evenly, avoiding accumulation or voids, thereby providing a stable material state for subsequent moisture detection; after the tobacco material is leveled, it automatically enters the detection area of the infrared moisture meter 5. The infrared moisture meter 5 measures the moisture content in the material by emitting infrared rays, and the data is transmitted to the PLC control panel 10 in real time. During this process, the staff should closely monitor the detection data to ensure the normal operation of the equipment. If the detection result shows that the moisture is too high or too low, adjust the detection parameters in time or troubleshoot equipment failures. The tobacco material after detection is sent into the sunken inner tank 6, and the ventilation tray 601 supports the tobacco material; the PLC control panel 10 judges whether drying treatment is required according to the moisture detection result. If the moisture is too high, the PLC control panel 10 issues an instruction and starts the hot wind type drying assembly 11. The ventilation tray 601 cooperates with the hot wind type drying assembly 11 to provide a stable hot air flow to help the tobacco material quickly and evenly evaporate the excess moisture. At this time, a part of the rotary power of the double-sided belt leak-proof conveying assembly 3 will be synchronously transmitted to the dial-type comb tooth evenly distributed assembly 7 through the belt transmission structure 8. The sawtooth structure of the dial-type comb tooth evenly distributed assembly 7 flips the material layer in a periodic reciprocating motion to ensure drying uniformity; the staff need to observe the operation state of the equipment to ensure the normal operation of the dial-type comb tooth evenly distributed assembly 7 without jamming or abnormal vibration, prevent material accumulation or caking, ensure that the tobacco fully contacts the hot air, so as to achieve uniform drying, and the staff should also regularly check the temperature and wind speed parameters of the drying equipment to ensure that the drying process is stably carried out within the set range; after drying is completed, the staff stop the operation of the hot wind type drying assembly 11 and the double-sided belt leak-proof conveying assembly 3 through the PLC control panel 10, transfer the dried tobacco material in the sunken inner tank 6 to the next link or storage area, and clean and maintain the equipment to ensure the normal operation of the double-sided belt leak-proof conveying assembly 3, the ventilation tray 601, and the dial-type comb tooth evenly distributed assembly 7, and make preparations for the detection and drying of the next batch.

[0055] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0056] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tobacco material moisture detection device based on optical infrared technology, characterized in that, Including: A chassis (1), inside which a sunken inner tank (6) is installed. At one end inside the sunken inner tank (6), a ventilation tray (601) is installed. On one side of the top of the chassis (1), a double-belt leak-proof conveying assembly (3) is installed. Inside one end of the double-belt leak-proof conveying assembly (3) away from the chassis (1), a double-axis adjustable front feeding assembly (4) is arranged. On one side of the top of the chassis (1), two symmetrical infrared moisture meters (5) are installed through a U-shaped frame. Tobacco materials sequentially pass through the double-axis adjustable front feeding assembly (4), the infrared moisture meters (5) and enter the sunken inner tank (6). A hot-air drying component (11), which is installed at the bottom of the sunken inner tank (6). On one side of the top of the ventilation tray (601), a feeding type comb tooth evenly distributing assembly (7) is installed. A belt transmission structure (8) for maintaining power connection is installed between the feeding type comb tooth evenly distributing assembly (7) and the double-belt leak-proof conveying assembly (3). On one side of the surface of the chassis (1), a PLC control panel (10) is installed. The output ends of the PLC control panel (10) are respectively electrically connected to the input ends of the double-belt leak-proof conveying assembly (3), the double-axis adjustable front feeding assembly (4), and the hot-air drying component (11). The output end of the infrared moisture meter (5) is electrically connected to the input end of the PLC control panel (10).

2. The tobacco material moisture detection device based on optical infrared technology according to claim 1, characterized in that: The double-belt leak-proof conveying assembly (3) includes a U-shaped steel structure frame (2) fixed on one side of the top of the chassis (1), a front support shaft (301) and a rear support shaft (302) respectively rotatably installed through bearing seats at the two edge positions on both sides of the top of the U-shaped steel structure frame (2), and belt rollers (303) fixed at both ends of the surfaces of the front support shaft (301) and the rear support shaft (302). A multi-groove belt (304) is sleeved between the two belt rollers (303) in the same X-axis direction. The double-axis adjustable front feeding assembly (4) is installed inside the U-shaped steel structure frame (2). The rear support shaft (302) drives the feeding type comb tooth evenly distributing assembly (7) to work through the belt transmission structure (8). On one outer wall of the chassis (1), a reduction motor (9) for driving the rear support shaft (302) to rotate is installed. On one side of the top of the ventilation tray (601) close to the rear support shaft (302), a slope channel (101) is installed.

3. The tobacco material moisture detection device based on optical infrared technology according to claim 2, characterized in that: Right-angle brackets (201) are welded at the front and rear edge positions of the top of the U-shaped steel structure frame (2), and upward-curved edges (202) are integrally formed at the front and rear edge positions of the top of the right-angle brackets (201).

4. The tobacco material moisture detection device based on optical infrared technology according to claim 2, characterized in that: The double-axis adjustable front laying assembly (4) includes an H-shaped horizontal frame (401) fixed inside the rectangular steel structure framework (2), a double-rod cylinder (402) installed on one inner wall of the H-shaped horizontal frame (401), a top plate (403) fixed to the top ends of the piston rods of the double-rod cylinder (402), and T-shaped arms (404) symmetrically installed on both sides of the top end of the top plate (403). The top ends of the T-shaped arms (404) extend upward and pass through between two multi-groove belts (304). A number of evenly spaced spreading rakes (405) are installed on the outer walls of the two T-shaped arms (404) on the sides away from each other.

5. The tobacco material moisture detection device based on optical infrared technology according to claim 4, wherein: Right-angle seats (4031) are installed on both sides of the top end of the top plate (403). A Y-axis cylinder (4032) is installed on one outer wall of the right-angle seat (4031). The top end of the piston rod of the Y-axis cylinder (4032) is fixedly connected to one outer wall of the T-shaped arm (404).

6. The tobacco material moisture detection device based on optical infrared technology according to claim 2, wherein: The hot-air drying assembly (11) includes a number of flat electric heating tubes (1101) installed at the bottom of the sunken inner tank (6) and a blower (1102) installed at the center position of the bottom end of the sunken inner tank (6). The hot-air drying assembly (11) further includes a thermocouple (1103) installed on the inner wall of the machine case (1) above the ventilation tray (601). The output end of the thermocouple (1103) is electrically connected to the input end of the PLC control panel (10). The flat electric heating tubes (1101) are located below the ventilation tray (601).

7. The tobacco material moisture detection device based on optical infrared technology according to claim 2, wherein: The material-pushing comb-tooth evenly distributed assembly (7) includes two axle carriers (701) fixed to one side of the top end of the ventilation tray (601), a C-port vertical frame (702) installed on the outer wall of the axle carrier (701) close to the slope path (101), and a transmission shaft (703) rotatably installed between the two C-port vertical frames (702). A crank-link material-pushing structure (704) is installed on the outer wall of one of the axle carriers (701). A cage-type material-returning structure (706) is installed between the two axle carriers (701) below the crank-link material-pushing structure (704). A sprocket transmission group (705) for power connection of the transmission shaft (703), the crank-link material-pushing structure (704), and the cage-type material-returning structure (706) is installed on the outer wall of one of the axle carriers (701). Power is transmitted between one end of the transmission shaft (703) and one end of the rear support shaft (302) through a belt transmission structure (8).

8. The tobacco material moisture detection device based on optical infrared technology according to claim 7, characterized in that: The crank connecting rod feeding structure (704) includes a protective shell (7011), a convex edge (7012) fixed on the front and rear outer walls of the axle carrier (701), a lower swing arm (7043) hingedly installed on one outer wall of the protective shell (7011), and a short shaft (7041) rotatably installed on one outer wall of one of the axle carriers (701). One end of the short shaft (7041) is fixed with a crank body (7042). One end of the surface of the crank body (7042) is hinged with a fish-eye type pulling arm (7044). The bottom end of the fish-eye type pulling arm (7044) is hinged with the top end of the lower swing arm (7043). A feeding rake (7045) is fixed between two adjacent lower swing arms (7043).

9. The tobacco material moisture detection device based on optical infrared technology according to claim 8, characterized in that: The cage type material returning structure (706) includes a tail shaft (7061) rotatably installed on the opposite outer walls of two axle carriers (701), a disc (7062) fixed at one end of the tail shaft (7061), and a number of bent ribs (7063) annularly and equally spaced and installed between the opposite outer walls of two discs (7062). The sprocket transmission group (705) includes a double sprocket transmission structure (7051) installed between a transmission shaft (703) and a short shaft (7041), and a triple sprocket transmission structure (7052) for connecting the short shaft (7041) and the tail shaft (7061).

10. A method for detecting the moisture content of tobacco materials using optical infrared technology, including the tobacco material moisture detection device using optical infrared technology as described in any one of claims 1-9, characterized in that: It includes the following steps: S101: Set process parameters through the PLC control panel (10), including the conveying speed of the double-sided belt leak-proof conveying assembly (3), the paving thickness of the double-shaft adjustable front paving assembly (4), the target moisture threshold of the infrared moisture meter (5), and the working temperature and wind speed of the hot wind type drying component (11). After confirming that the feedback signals of each assembly component are normal, enter the working state; S102: Put the tobacco material to be inspected onto the double-sided belt leak-proof conveying assembly (3). The double-sided belt leak-proof conveying assembly (3) conveys the tobacco material to be inspected from storage or the previous process to the detection area where the infrared moisture meter (5) is located. During the conveying process, the double-shaft adjustable front paving assembly (4) is adjusted according to the preset parameters to spread the tobacco material on the double-sided belt leak-proof conveying assembly (3) to form a uniform material layer. The infrared moisture meter (5) measures the moisture content in the material by emitting infrared rays, and the data is transmitted to the PLC control panel (10) in real time; S103: The tobacco material after detection is fed into the sunken inner container (6), and the ventilation tray (601) supports the tobacco material. The PLC control panel (10) determines whether drying treatment is required according to the moisture detection result. If the moisture is too high, the PLC control panel (10) issues an instruction and starts the air-heat drying component (11). The ventilation tray (601) cooperates with the air-heat drying component (11) to provide a stable hot air flow, helping the tobacco material to quickly and evenly evaporate the excess moisture. And a part of the rotary power of the double-sided belt leak-proof conveying assembly (3) will be synchronously transmitted to the material-dialing comb tooth evenly distributed assembly (7) through the belt transmission structure (8). The sawtooth structure of the material-dialing comb tooth evenly distributed assembly (7) turns the material layer in a periodic reciprocating motion to ensure the drying uniformity; S104: After drying is completed, the staff stops the operation of the air-heat drying component (11) and the double-sided belt leak-proof conveying assembly (3) through the PLC control panel (10), and transfers the dried tobacco material in the sunken inner container (6) to the next process or the storage area.

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