Tobacco feeding device, system and method

Abstract

The present invention discloses a tobacco feeding device, system and method, which relate to the field of tobacco machinery and are used to increase the uniformity of material transportation. The tobacco feeding device includes a conveyor belt, a roller, an adjustment mechanism and a driving mechanism. The conveyor belt is configured to convey materials. The roller is located above the conveyor belt and is spaced apart from the conveying surface of the conveyor belt. The roller of the adjusting mechanism is installed on the adjusting mechanism, and the adjusting mechanism is configured to adjust the distance between the roller and the conveying surface of the conveyor belt. The driving mechanism is connected to the roller driving to drive the roller to rotate. In the tobacco feeding device provided by the above technical solution, the distance between the roller and the conveyor belt can be adjusted, which makes the flow area of ​​the material adjustable, so that the flow area of ​​the material can be adjusted as needed, thereby achieving uniform feeding.

Description

Technical Field

[0001] The invention relates to the field of tobacco machinery, and in particular to a tobacco leaf feeding device, system and method. Background Art

[0002] As the material basis of the unique aroma and taste of blended cigarettes, burley tobacco has a significant impact on the sensory quality of blended cigarettes. The role of cigarette additives is to reduce irritation, make smoke soft and delicate, improve the aftertaste, and improve the physical properties of tobacco materials, improve the smoking quality of cigarettes, and meet consumer needs.

[0003] In order to ensure the effect of tobacco leaf feeding and the balance of product quality, the instantaneous flow rate of tobacco leaves in the feeding process is required to be stable, so that the feeding amount is applied at a fixed ratio, and the instantaneous flow rate of the feeding liquid is uniform and stable. In the related technology, a quantitative feeding system is used to achieve the stability of the instantaneous flow rate of tobacco leaves in the feeding process. The quantitative feeding system includes a cabinet feeder, a vibrating trough, a conveyor belt, and a limiting tube. The material is transported by the cabinet feeder to the vibrating trough, then to the conveyor belt, and then into the limiting tube. The low, medium, and high photoelectric tubes of the limiting tube control the running speed of the feeder and the conveyor belt, so that the material enters the electronic belt scale relatively evenly, thereby achieving a uniform and stable material flow into the feeder.

[0004] The inventors found that there are at least the following problems in the prior art: First, the cabinet feeder adopts a patrol pile spreading method, that is, after the material accumulates to a certain height in the cabinet, it continues to accumulate the material backward, which is a first-in-first-out discharging method. This spreading method has poor uniformity in the stacking of materials in the cabinet feeder, which leads to poor uniformity in the discharging of materials in the cabinet feeder, large fluctuations in instantaneous flow, and easy blockage of the conveyor belt and the limiting tube. Secondly, when producing blended cigarettes, due to the large difference in physical properties between different tobacco block raw materials, especially burley tobacco and ordinary tobacco, the bulk density (i.e., the weight of the material per unit volume) ratio between the two reaches 2.1:1. Since the cabinet feeder is first-in-first-out, when the material is connected between the two tobacco leaves, there will be a large difference in the instantaneous volume flow rate under the same material flow rate. At this time, it is very easy for the material flow rate on the electronic belt scale to fluctuate, and even the material flow rate cannot be met. Summary of the invention

[0005] The present invention provides a tobacco leaf feeding device, system and method for increasing the uniformity of material transportation.

[0006] The present invention provides a tobacco leaf feeding device, comprising:

[0007] A conveyor belt, configured to convey material;

[0008] A roller, located above the conveyor belt and spaced apart from the conveying surface of the conveyor belt;

[0009] an adjusting mechanism, the roller being mounted on the adjusting mechanism, the adjusting mechanism being configured to adjust the distance between the roller and the conveying surface of the conveyor belt; and

[0010] The driving mechanism is connected to the driving roller to drive the driving roller to rotate.

[0011] In some embodiments, the adjustment mechanism comprises:

[0012] A mounting seat, on which the roller is rotatably mounted;

[0013] a driving wheel rotatably connected to the mounting seat; and

[0014] The rack is fixedly arranged, and the driving wheel is engaged with the rack; wherein the driving wheel rotates to drive the mounting seat to move relative to the rack.

[0015] In some embodiments, the adjustment mechanism further comprises:

[0016] A guide mechanism, the mounting seat is arranged on the guide mechanism, and the guide mechanism is constructed to provide guidance for the linear movement of the mounting seat.

[0017] In some embodiments, the guiding mechanism comprises:

[0018] A linear bearing, the mounting seat is provided with a first mounting hole, and the linear bearing is located in the first mounting hole; and

[0019] The guide rod is fixedly arranged and passes through the second mounting hole of the linear bearing.

[0020] In some embodiments, the driving mechanism comprises:

[0021] A first sprocket is drivingly connected to the shifting roller to drive the shifting roller to rotate;

[0022] a second sprocket drivingly connected to the driving source; and

[0023] A chain is wound around the first sprocket and the second sprocket to transmit the rotation of the driving source to the first sprocket via the second sprocket.

[0024] In some embodiments, the driving mechanism further comprises:

[0025] A tensioning wheel is configured to tension the chain.

[0026] In some embodiments, the roller is located in the middle area of ​​the conveyor belt in the length direction.

[0027] In some embodiments, the running speed of the conveyor belt is configured to be adjustable.

[0028] The embodiment of the present invention further provides a tobacco leaf feeding system, comprising:

[0029] The tobacco leaf feeding device provided by any technical solution of the present invention; and

[0030] A material level detection element is located downstream of the tobacco feeding device, and the material level detection element is constructed to detect the amount of material output by the tobacco feeding device.

[0031] In some embodiments, the tobacco leaf feeding system further comprises:

[0032] a feeder configured to output material; and

[0033] A vibration trough is located downstream of the feeder and upstream of the conveyor belt. The vibration trough is configured to vibrate the material uniformly and then convey it to the conveyor belt.

[0034] In some embodiments, the feeding speed of the feeder is configured to be adjustable.

[0035] The embodiment of the present invention further provides a tobacco leaf feeding device control method, comprising the following steps:

[0036] Detect material level on conveyor belt;

[0037] The distance between the transfer roller and the conveying surface of the conveyor belt is adjusted according to the material level, wherein the distance is positively correlated with the material level.

[0038] In some embodiments, the running speed of the conveyor belt and / or the feeding speed of the feeder are controlled in the following manner:

[0039] If the material level is greater than the first set value, reducing the running speed of the conveyor belt and / or reducing the feeding speed of the feeder;

[0040] If the material level is greater than the second set value and less than the first set value, the running speed of the conveyor belt and / or the feeding speed of the feeder are maintained;

[0041] If the material level is greater than the third set value and less than the second set value, increasing the running speed of the conveyor belt and / or increasing the feeding speed of the feeder;

[0042] If the material level is less than a third set value, increasing the running speed of the conveyor belt and / or increasing the feeding speed of the feeder;

[0043] The first setting value is greater than the second setting value, and the second setting value is greater than the third setting value.

[0044] In some embodiments, the spacing between the roller and the conveying surface of the conveyor belt is controlled in the following manner:

[0045] If the material level is greater than the first set value, increasing the distance;

[0046] If the material level is greater than the second set value and less than the first set value, maintaining the distance;

[0047] If the material level is greater than the third setting value and less than the second setting value, reducing the distance;

[0048] If the material level is less than a third set value, the distance is reduced.

[0049] The tobacco leaf feeding device provided by the above technical solution has an adjustable distance between the roller and the conveyor belt, which makes the material flow area adjustable. By adjusting the position of the roller, the material flow entering the downstream electronic belt scale always meets the production requirements. In addition, when the conveyed material changes, even if the material has different bulk densities, the position of the roller can be adjusted to achieve a uniform and stable material flow, thereby improving the feeding accuracy and product quality, while ensuring the stable and continuous operation of the equipment, reducing the frequency of start-stop, and minimizing the labor intensity of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0051] Figure 1 A schematic diagram of the tobacco leaf feeding device in use according to an embodiment of the present invention;

[0052] Figure 2 A partially enlarged schematic diagram of a tobacco leaf feeding device provided in an embodiment of the present invention;

[0053] Figure 3 A partial enlarged schematic diagram of the roller of the tobacco leaf feeding device provided in an embodiment of the present invention;

[0054] Figure 4 A schematic flow chart of a tobacco leaf feeding method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0055] Combine the following Figure 1 to Figure 4 The technical solution provided by the present invention is described in more detail.

[0056] See also Figures 1 to 3, an embodiment of the present invention provides a tobacco feeding device, which can achieve uniform feeding when the type of material changes. The tobacco feeding device includes a conveyor belt 1, a roller 2, an adjustment mechanism 3 and a driving mechanism 4. The conveyor belt 1 is configured to convey materials. The roller 2 is located above the conveyor belt 1 and is spaced apart from the conveying surface of the conveyor belt 1. The roller 2 is mounted on the adjustment mechanism 3, and the adjustment mechanism 3 is configured to adjust the distance between the conveying surface of the roller 2 and the conveyor belt 1. The adjustment mechanism 3 changes the distance between the roller 2 and the conveyor belt 1 by changing the position of the roller 2. The driving mechanism 4 is drivingly connected to the roller 2 to drive the roller 2 to rotate.

[0057] The roller 2, the adjusting mechanism 3 and the driving mechanism 4 can be supported by the frame 10 of the conveyor belt 1, specifically by the supporting columns. By supporting the supporting columns, the bending deformation caused by the weight of the above-mentioned parts to the side plates of the frame 10 can be reduced.

[0058] Most of the components of the roller 2, the adjustment mechanism 3 and the drive mechanism 4 can be located in the shell 30, and the shell 30 is also supported by the support column. The shell 30 can protect the components inside it, and can prevent dust and reduce the damage to people and objects that may be caused during the movement of the components. Angle steel can be selected as the frame of the shell 30 to reduce the total weight of the device. A plurality of connectors, such as 12 cylinders, are arranged between the shell 30 and the frame 10. Through the support of the cylinder, the difficulty of hole alignment during installation can be reduced; at the same time, the entire device is lifted, which can be easily cleaned to prevent the hidden danger of tobacco insects caused by residual materials. In addition, the use of multiple connectors increases the contact area between the shell 30 and the frame 10 and reduces the pressure on the contact surface. At the same time, the shell 30 is also padded to facilitate the cleaning of residual materials at the bottom of the shell 30.

[0059] See also Figure 3 The roller 2 includes a rotating body 21 and a pin 22 disposed on the rotating body 21. Specifically, a roller 2 with a small shaft diameter and a long pin can be selected. The rotating body with a small shaft diameter can reduce the weight of the roller 2; the long pin can increase the linear speed of the end of the roller 2, and the material-moving speed is large.

[0060] The roller 2 has two movements. One is continuous rotation, which makes the material evenly spread on the conveying surface of the conveyor belt 1. The rotation of the roller 2 is driven by the driving mechanism 4. The driving mechanism 4 can be driven by a motor, a sprocket, a gear, etc. The second is the movement of the roller 2 relative to the conveying surface of the conveyor belt 1. This movement is not necessarily carried out in real time. It will only be carried out when the height of the logistics accumulation on the conveyor belt 1, that is, the material level, changes. The adjustment mechanism 3 can realize the up and down movement of the roller 2 in a variety of ways.

[0061] Two adjusting mechanisms 3 can be provided, and one adjusting mechanism 3 is provided at each of the two axial ends of the shifting roller 2. The implementation mode of the two adjusting mechanisms 3 can be the same. Two adjusting mechanisms 3 are provided to ensure that the bearing seats on both sides of the shifting roller 2 can be raised and lowered synchronously.

[0062] See also Figure 2 and Figure 3 In some embodiments, the adjustment mechanism 3 includes a mounting seat 31, a driving wheel 32, a lifting motor and a rack 33. The roller 2 is rotatably mounted on the mounting seat 31, and the rotation can be realized through a bearing. The driving wheel 32 is rotatably connected to the mounting seat 31. The rack 33 is fixedly arranged, and the driving wheel 32 is meshed with the rack 33. Among them, the lifting motor drives the driving wheel 32 described above to rotate to drive the mounting seat 31 to move relative to the rack 33.

[0063] The driving wheel 32 rotates under the drive of the lifting motor, and then the driving wheel 32 moves up and down along the rack 33. The up and down movement of the driving wheel 32 causes the mounting seat 31 to move up and down, thereby realizing the up and down movement of the roller 2. The lifting motor is fixed on the frame 10. The up and down movement of the roller 2 changes the spacing of the roller 2 relative to the conveying surface of the conveyor belt 1. In some embodiments, the lifting motor can also be replaced by a driving component such as a proportional adjustment cylinder.

[0064] A rotary encoder is installed on the lifting motor, and the height and lifting distance of the roller 2 are determined by the rotary encoder, thereby realizing the control of the lifting height of the roller 2.

[0065] The lifting motor can drive the driving wheel 32 described above to rotate through the intermediate wheel 35. Specifically, the intermediate wheel 35 and the driving wheel 32 are coaxially arranged and connected by a key. The lifting motor is directly connected to the intermediate wheel 35, and the driving wheel 32 is driven to move up and down along the rack 33 through the rotation of the intermediate wheel 35.

[0066] See also Figure 2 and Figure 3 In some embodiments, the adjustment mechanism 3 further includes a guide mechanism 34, and the guide direction of the guide mechanism 34 is parallel to the length direction of the rack 33. The mounting seat 31 is arranged on the guide mechanism 34, and the guide mechanism 34 is configured to provide guidance for the linear movement of the mounting seat 31. The guide mechanism 34, for example, adopts a slider rail, a linear bearing 341, etc. The provision of the guide mechanism 34 can make the up and down displacement of the mounting seat 31 more stable, reliable, and smooth.

[0067] See also Figure 2 and Figure 3In some embodiments, the guide mechanism 34 includes a linear bearing 341 and a guide rod 342. The mounting seat 31 is provided with a first mounting hole 310, and the linear bearing 341 is located in the first mounting hole 310. The linear bearing 341 matches the first mounting hole 310. The guide rod 342 is fixedly arranged, and the guide rod 342 passes through the second mounting hole 343 of the linear bearing 341. The guide rod 342 and the linear bearing 341 form a match. The linear bearing 341 moves up and down with the mounting seat 31, and the guide rod 342 is fixed on the frame 10 and does not move therewith. The guide rod 342 can be a straight rod.

[0068] See also Figure 2 and Figure 3 , the implementation method of the driving mechanism 4 is introduced below.

[0069] In some embodiments, the driving mechanism 4 includes a first sprocket, a second sprocket and a chain. The first sprocket is drivingly connected to the roller 2 to drive the roller 2 to rotate. The second sprocket is drivingly connected to the driving source. The chain is wound around the first sprocket and the second sprocket to transmit the rotation of the driving source to the first sprocket via the second sprocket.

[0070] External force drives the second sprocket to rotate, and the second sprocket drives the first sprocket to rotate through the chain. The first sprocket is fixedly connected to the shifting roller 2, and the rotation of the first sprocket drives the shifting roller 2 to rotate synchronously.

[0071] In some embodiments, the driving mechanism 4 further includes a tensioning wheel, which is configured as a tensioning chain. The chain is always kept in a certain tension through the tensioning sprocket, and the tensioning wheel changes position accordingly during the lifting and lowering process of the roller 2. When the roller 2 is in different positions, the tensioning wheel is always kept in a tensioned state under the action of the tension spring, so that the chain is kept in a tensioned position. The above technical solution enables the chain to be always in a tensioned state, so that the rotational torque can be stably transmitted from the second sprocket to the first sprocket.

[0072] Considering that the roller 2 has a certain length, in order to make the rotation of the roller 2 more stable, a driving mechanism 4 can be provided at both ends of the roller 2. The two driving mechanisms 4 drive the roller 2 to rotate at the same time. The two driving mechanisms 4 can adopt the same implementation mode.

[0073] See also Figure 1 In some embodiments, the roller 2 is located in the middle area of ​​the length direction of the conveyor belt 1. This position is relatively open, which is convenient for setting the roller 2, and the number of rollers 2 can be one or more if the requirements are met.

[0074] In some embodiments, the running speed of the conveyor belt 1 is configured to be adjustable. The running speed of the conveyor belt 1 can be changed by adjusting the rotation speed of the motor driving the conveyor belt 1 to move.

[0075] The real-time adjustment of the height of the roller 2 can realize the automatic control of the height of the flow channel through the control program.

[0076] See also Figure 1 The embodiment of the present invention further provides a tobacco leaf feeding system, comprising a tobacco leaf feeding device provided by any technical solution of the present invention and a material level detection element 5. The material level detection element 5 is located downstream of the tobacco leaf feeding device, and the material level detection element 5 is configured to detect the amount of material output by the tobacco leaf feeding device.

[0077] The material level detection element 5 is, for example, a beam-type photoelectric tube, a grating detection, etc. The material flow area, that is, the height of the roller 2 relative to the conveyor belt 1 is adjusted according to the detection result of the material level detection element 5 .

[0078] The limit tube has three detection positions: the first detection position, the second detection position and the third detection position. The three positions are detected according to the opposite photoelectric tube. The first detection position, the second detection position and the third detection position correspond to three different material level heights. The third detection position corresponds to the lowest material level, the second detection position corresponds to the middle material level, and the first detection position corresponds to the highest material level. If the material does not block the third detection position, it means that the material detected by the limit tube is very small and does not even reach the lowest material level. If the material only blocks the third detection position, it means that the material detected by the limit tube is only more than the lowest material level. If the material blocks the second detection position and does not block the first detection position, it means that the material detected by the limit tube is between the middle material level and the highest material level. If the material blocks the first detection position, it means that the material detected by the limit tube is higher than the highest material level.

[0079] See also Figure 1 In some embodiments, the tobacco leaf feeding system further includes a feeder 6 and a vibration trough 7. The feeder 6 is configured to output materials; the vibration trough 7 is located downstream of the feeder 6 and upstream of the conveyor belt 1, and the vibration trough 7 is configured to vibrate the materials uniformly and then convey them to the conveyor belt 1. The feeder 6 and the vibration trough 7 may adopt existing structures.

[0080] The feeding speed of the feeder 6 is configured to be adjustable. The entire system can control the motor frequency of the bottom belt of the feeder 6, the motor frequency of the conveyor belt 1, and the distance between the roller 2 and the conveyor belt 1 through the material height detected by the limiting tube, so that the material always enters the limiting tube evenly and stably during the material transportation process. When the bulk density of the material changes, the motor frequency of the bottom belt of the cabinet feeder 6, the motor frequency of the conveyor belt 1, and the distance between the roller 2 and the conveyor belt 1 of the device can be automatically adjusted according to the material height of the limiting tube and the cumulative time of material feeding per unit time.

[0081] As mentioned above, due to the processing requirements of blended cigarettes, the physical properties of different tobacco block raw materials vary greatly, especially for burley tobacco and ordinary tobacco, the bulk density, that is, the weight per unit volume of the materials, is 2.1:1. At the same time, due to the poor uniformity of the discharge of the cabinet feeder 6 and the fluctuation of the actual moisture content of the materials, the volume flow rate of different materials varies by more than 50% under the same flow rate requirements. The huge fluctuation of the volume flow rate can easily cause the flow rate to fail to meet the production needs, and it is very easy to block the material, affecting normal production.

[0082] The tobacco leaf feeding system provided by the above technical solution can effectively improve the uneven discharge phenomenon in the above situation, and is also applicable to other materials with large specific gravity differences. The above system can realize the translation of the material leveling roller 2 in the direction perpendicular to the material conveying direction, and adjust the distance between the bottom of the roller 2 and the belt surface of the conveyor belt 1 according to the material conditions at the limiting tube and the material conditions in front of the roller 2; and can adjust one or more of the feeding speed of the feeder 6 and the conveying speed of the conveyor belt 1 as needed. In addition, the uniform and stable feeding of the cabinet feeder 6 is achieved, the volume flow rate passing through per unit time can be adjusted according to the on-site conditions, and the material entering the limiting tube is kept uniform and stable, preventing the occurrence of material blockage, ensuring product quality, and improving sensory quality. When the bulk density of the material changes suddenly or the difference is large, the material entering the limiting tube can still meet the production flow requirements, and the entering material is uniform and stable, thereby realizing the quantitative feeding of the material after the cabinet feeder 6, ensuring the stability of the subsequent processing equipment, and improving the sensory quality.

[0083] See also Figure 4 Some embodiments of the present invention provide a tobacco leaf feeding device control method, comprising the following steps:

[0084] Step S100 , detecting the material level on the conveyor belt 1 .

[0085] Step S200, adjusting the distance between the roller 2 and the conveying surface of the conveyor belt 1 according to the material level, wherein the distance is positively correlated with the material level.

[0086] In some embodiments, the running speed of the conveyor belt 1 is controlled in the following manner: if the material level is less than the first set value, the running speed of the conveyor belt 1 and / or the feeding speed of the feeder 6 are increased; if the material level is greater than the first set value, the running speed of the conveyor belt 1 and / or the feeding speed of the feeder 6 are reduced; if the material level is greater than the second set value and less than the first set value, the running speed of the conveyor belt 1 and / or the feeding speed of the feeder 6 are maintained; if the material level is greater than the third set value and less than the second set value, the running speed of the conveyor belt 1 and / or the feeding speed of the feeder 6 are increased; if the material level is less than the third set value, the running speed of the conveyor belt 1 and / or the feeding speed of the feeder 6 are increased. Among them, the first set value is greater than the second set value, and the second set value is greater than the third set value.

[0087] In some embodiments, the spacing between the roller 2 and the conveying surface of the conveyor belt 1 is controlled in the following manner: if the material level is greater than the first set value, the spacing is increased; if the material level is greater than the second set value and less than the first set value, the spacing is maintained; if the material level is greater than the third set value and less than the second set value, the spacing is reduced; if the material level is less than the third set value, the spacing is reduced.

[0088] Some specific embodiments are described below. There are three objects to be controlled: the feeding speed of the feeder 6, the transport speed of the conveyor belt 1, and the height of the roller 2. Each of these objects will be described below.

[0089] The feeding speed of the feeder 6 is determined by the bottom belt motor M1 of the feeder 6. The running speed of the bottom belt motor M1 of the feeder 6 is related to the material level detected by the limiting tube. The feeding speed control method of the feeder 6 is as follows:

[0090] First, a measuring photoelectric tube is installed at a certain distance in front of the entrance of the material leveling roller 2, and the height of the material position in the limit tube, that is, the material level, is detected by the photoelectric tube.

[0091] Secondly, the control method for automatic adjustment of the bottom belt motor M1 of the cabinet feeder 6 is constructed. The various parameters are defined as follows: The operating frequency of the bottom belt motor is , the bottom belt motor operating frequency range is ~ , there are three frequency automatic adjustment values: , , .in, Between and between.

[0092] The limit tube has three detection positions: when the first detection position PT1, the second detection position PT2, and the third detection position PT3 are all unobstructed, it means that the amount of material is relatively small. At this time, the control strategy is: increase the operating frequency of the bottom belt motor Increase , to increase material conveying capacity.

[0093] When the first detection position PT1 and the second detection position PT2 of the limiting tube are not blocked, and the third detection position PT3 is blocked, it means that the amount of material is relatively small. At this time, the control strategy is: the bottom belt motor operating frequency Increase , to increase the feeding amount of feeder 6.

[0094] When the first detection position PT1 of the limiting tube is not blocked, and the second detection position PT2 and the third detection position PT3 are blocked, the control strategy is: make the bottom belt motor run at a frequency of Keep unchanged, that is, keep the feeding speed of feeder 6.

[0095] When the first detection position PT1, the second detection position PT2 and the third detection position PT3 of the limiting tube are all blocked, it means that the amount of material is too much. At this time, the control strategy is: increase the operating frequency of the bottom belt motor reduce , to reduce the feeding speed of feeder 6.

[0096] It should be noted that the operating frequency of the bottom belt motor M1 should always be within the range described above. If the running frequency is too low, the bottom belt motor running frequency should be increased. equal When the bottom belt motor operating frequency is automatically adjusted to be greater than or equal to If the running frequency is too fast, the bottom belt motor running frequency should be reduced. equal .

[0097] The following describes how to adjust the conveying capacity of conveyor belt 1. Specifically, the speed of conveying materials can be controlled by controlling the running speed of conveyor belt 1 motor M3. The definitions of various parameters are as follows: The running frequency of the conveyor belt motor is , the operating frequency range of the conveyor belt motor is ~ , frequency automatic adjustment value , , . Between and between.

[0098] The control method of the conveyor belt motor M3 is also related to the material level detected by the limiting tube.

[0099] When the first detection position PT1, the second detection position PT2, and the third detection position PT3 of the limiting tube are all unobstructed, the conveyor belt motor running frequency Increase , that is, increase the running speed of the conveyor belt 1, thereby increasing the material conveying capacity.

[0100] When the first detection position PT1 and the second detection position PT2 of the limiting tube are not blocked, and the third detection position PT3 is blocked, the conveyor belt motor running frequency Increase , that is, increase the running speed of the conveyor belt 1, thereby increasing the material conveying capacity.

[0101] When the first detection position PT1 of the limiting tube is not blocked, the second detection position PT2 and the low material level PT1 are blocked, the conveyor belt motor running frequency Keep unchanged, that is, keep the running speed of conveyor belt 1.

[0102] When the first detection position PT1, the second detection position PT2 and the third detection position PT3 of the limiting tube are all blocked, the conveyor belt motor running frequency reduce , that is, reducing the running speed of the conveyor belt 1, thereby reducing the material conveying capacity.

[0103] It should be noted that the operating frequency of the conveyor belt motor should be within the range described above. When the conveyor belt 1 motor is running at a low frequency, the conveyor belt motor should be running at a low frequency. equal When the conveyor belt motor operating frequency is automatically adjusted to be greater than or equal to If the conveyor belt motor is running too fast, the conveyor belt (1) motor should be kept running at a low frequency. equal .

[0104] Next, we will introduce the method of adjusting the height of the roller 2. The parameters are defined as follows: The real-time height of the roller 2 is , the minimum height is , the maximum height is , the height adjustment value is .

[0105] When the photoelectric tube detects that the material transfer time exceeds T1 within T time, the height of the transfer roller 2 Increase .

[0106] When the photoelectric tube detects that the material transfer time is between T2 and T1 within the time T, the height of the transfer roller 2 constant.

[0107] When the photoelectric tube detects that the material feeding time is lower than T2 within T time, the height of the feeding roller 2 reduce .

[0108] It should be noted that the position of the roller 2 should always be within the range described above. After automatic adjustment, it is equal to or less than When the roller 2 is too low, the height of the roller 2 should be equal When the height of roller 2 After automatic adjustment, it is greater than or equal to , it means that the position of the roller 2 is too high. At this time, the height of the roller 2 should be equal .

[0109] The overall control method is: first define the PLC program control timer △ ,△ ,△ ,△ , T and At the beginning, the material level detected by the limiting tube is determined first, and the control logic is divided into the following situations:

[0110] (1) When the material level detected by the limiting tube is below the third detection position PT3, this means that the material cannot meet the flow requirements and the bottom belt motor operating frequency Increase , while the conveyor belt motor operating frequency Increase If the timer △ After that, if the material level of the limiting tube is still below the third detection position PT3, the bottom belt motor operating frequency And the conveyor belt motor operating frequency Then add and . This cycle continues. If the timer △ When the timing starts but has not ended, the material level rises back to the third detection position PT3, and the timer is reset. .

[0111] (2) When the material level detected by the limiting tube is between the third detection position PT3 and the second detection position PT2, it means that the material can just meet the flow requirement. However, there is a possibility that it will not be able to meet the flow requirement. Then, after the timer △ After that, the bottom belt motor running frequency Increase , while the conveyor belt motor operating frequency Increase If another timer △ After that, if the material level detected by the limiting tube is still between the third detection position PT3 and the second detection position PT2, the bottom belt motor operating frequency F (M1) and the conveyor belt motor operating frequency Then add and This cycle continues. If the timer △ If the timing starts but has not ended, the material level is not within the range, and the timer is reset. .

[0112] (3) When the material level detected by the limiting tube is between the second detection position PT2 and the first detection position PT1, this means that the material can just meet the flow requirement. After that, if the material level is still between the second detection position PT2 and the first detection position PT1, the bottom belt motor operating frequency and conveyor belt motor operating frequency Keep the original frequency running state without adjustment. If the timing starts but has not ended, and the material level is not within this range, the timer will be reset. .

[0113] (4) When the material level detected by the limiting tube is above the first detection position PT1, it means that the material exceeds the flow requirement. After that, if the material level of the limiting pipe is above the first detection position PT1, the upstream equipment of the limiting pipe is stopped immediately, otherwise it will cause material blocking, and at the same time, the operating frequency of the bottom belt motor is increased. reduce , while the conveyor belt motor operating frequency reduce . This cycle continues. If the timer △ When the timing starts but has not ended, the material level is lower than the first detection position PT1, then the timer is reset. .

[0114] For any of the above situations, when the bottom belt motor operating frequency is automatically adjusted to be equal to or less than When the bottom belt motor runs at equal When the bottom belt motor operating frequency is automatically adjusted to be greater than or equal to When the bottom belt motor runs at equal Similarly, the operating frequency of the conveyor belt motor is also the same. The same is true.

[0115] The photoelectric tube detects the accumulated time of material feeding within T time. When T1 is exceeded, the height of the device Increase ; When the photoelectric tube detects the accumulated time of material transfer within T time At T2 to T1, the height of the device When the photoelectric tube detects the accumulated time of material feeding within T time, Below T2, the height of the device reduce ; When the height of the device After automatic adjustment, it is equal to or less than When the height of the device equal When the height of the device After automatic adjustment, it is greater than or equal to When the height of the device equal .

[0116] According to the above control logic, a PLC control program is written to realize the automatic adjustment system of the cabinet feeder 6 out of the cabinet.

[0117] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0118] 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, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tobacco leaf feeding device, characterized in that: include: A conveyor belt (1) configured to convey material; A transfer roller (2), located above the conveyor belt (1) and spaced apart from the conveying surface of the conveyor belt (1); an adjusting mechanism (3), the moving roller (2) being mounted on the adjusting mechanism (3), the adjusting mechanism (3) being configured to adjust the distance between the moving roller (2) and the conveying surface of the conveyor belt (1); as well as A driving mechanism (4) is connected to the driving roller (2) to drive the driving roller (2) to rotate; The regulating mechanism (3) comprises: A mounting seat (31), the moving roller (2) being rotatably mounted on the mounting seat (31); a driving wheel (32) rotatably connected to the mounting seat (31); and The rack (33) is fixedly arranged, and the driving wheel (32) is meshed with the rack (33); wherein the driving wheel (32) rotates to drive the mounting seat (31) to move relative to the rack (33); The transfer roller (2) is located in the middle area of ​​the conveyor belt (1) in the length direction.

2. The tobacco leaf feeding device according to claim 1, characterized in that: The regulating mechanism (3) further comprises: A guide mechanism (34), the mounting seat (31) is arranged on the guide mechanism (34), and the guide mechanism (34) is configured to provide guidance for the linear movement of the mounting seat (31).

3. The tobacco leaf feeding device according to claim 2, characterized in that: The guiding mechanism (34) comprises: A linear bearing (341), the mounting seat (31) being provided with a first mounting hole (310), the linear bearing (341) being located in the first mounting hole (310); and The guide rod (342) is fixedly arranged, and the guide rod (342) passes through the second mounting hole (343) of the linear bearing (341).

4. The tobacco leaf feeding device according to claim 1, characterized in that: The driving mechanism (4) comprises: A first sprocket is drivingly connected to the shifting roller (2) to drive the shifting roller (2) to rotate; a second sprocket drivingly connected to the driving source; and A chain is wound around the first sprocket and the second sprocket to transmit the rotation of the driving source to the first sprocket via the second sprocket.

5. The tobacco leaf feeding device according to claim 4, characterized in that: The driving mechanism (4) further comprises: A tensioning wheel is configured to tension the chain.

6. The tobacco leaf feeding device according to claim 1, characterized in that: The running speed of the conveyor belt (1) is configured to be adjustable.

7. A tobacco leaf feeding system, characterized in that: include: The tobacco leaf feeding device according to any one of claims 1 to 6; as well as A material level detection element (5) is located downstream of the tobacco leaf feeding device, and the material level detection element (5) is configured to detect the amount of material output by the tobacco leaf feeding device.

8. The tobacco leaf feeding system according to claim 7, characterized in that: Also includes: A feeder (6) configured to output material; as well as The vibration trough (7) is located downstream of the feeder (6) and upstream of the conveyor belt (1), and the vibration trough (7) is configured to vibrate the material evenly and then convey it to the conveyor belt (1).

9. The tobacco leaf feeding system according to claim 8, characterized in that: The feeding speed of the feeder (6) is configured to be adjustable.

10. A tobacco leaf feeding device control method, characterized in that: The tobacco leaf feeding device is the tobacco leaf feeding device according to any one of claims 1 to 6, and the method comprises the following steps: Detect material level on conveyor belt; The distance between the transfer roller and the conveying surface of the conveyor belt is adjusted according to the material level, wherein the distance is positively correlated with the material level.

11. The tobacco leaf feeding device control method according to claim 10, characterized in that: The running speed of the conveyor belt and / or the feeding speed of the feeder are controlled in the following manner: If the material level is greater than a first set value, reducing the running speed of the conveyor belt and / or reducing the feeding speed of the feeder; If the material level is greater than the second set value and less than the first set value, the running speed of the conveyor belt and / or the feeding speed of the feeder are maintained; If the material level is greater than the third set value and less than the second set value, increasing the running speed of the conveyor belt and / or increasing the feeding speed of the feeder; If the material level is less than a third set value, increasing the running speed of the conveyor belt and / or increasing the feeding speed of the feeder; The first setting value is greater than the second setting value, and the second setting value is greater than the third setting value.

12. The tobacco leaf feeding device control method according to claim 11, characterized in that: The spacing between the roller and the conveying surface of the conveyor belt is controlled in the following manner: If the material level is greater than the first set value, increasing the distance; If the material level is greater than the second set value and less than the first set value, maintaining the distance; If the material level is greater than the third setting value and less than the second setting value, reducing the distance; If the material level is less than a third set value, the distance is reduced.

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