Automatic air supplement device for tobacco redrying machine and tobacco redrying equipment

Abstract

The invention discloses an automatic air supplement device for a tobacco redrying machine and tobacco redrying equipment, and relates to the technical field of tobacco processing. The automatic air supplement device comprises a flow guide cover, a shutter type air supplement device, a shutter driving device and a lower computer. An air supplementing opening is formed in the flow guide cover, the air supplementing opening is formed in the position close to an atomizing nozzle of a moisture regaining area of the tobacco redrying machine, and the size of the air supplementing opening is determined by the needed air supplementing amount and the minimum air speed of the air supplementing opening; the shutter type air supplementing device comprises a plurality of shutter blades and a linkage mechanism, the shutter blades are connected with the shutter driving device through the linkage mechanism, and the shutter driving device is used for driving the linkage mechanism to drive the shutter blades to rotate, so that the opening degree of the air supplementing opening is adjusted; and the lower computer is used for controlling the action of the shutter driving device. The problems that in the existing tobacco leaf redrying process, air supplement in a moisture regaining area is insufficient, and the air supplement amount is not easy to control can be solved, and therefore the tobacco leaf moisture regaining performance is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco processing, and in particular to an automatic air supply device for a tobacco leaf redrying machine and tobacco leaf redrying equipment. Background Art

[0002] The tobacco leaf redrying machine is divided into a drying area, a cooling area, and a rehumidification area. The tobacco leaves are dried and cooled to achieve the best moisture content modulation state. Then, the moisture content and temperature of the tobacco leaves are controlled by rehumidification to meet the packing requirements, which is conducive to the later storage and aging of the tobacco leaves. The fan in the drying area rotates to drive the air flow. When the air passes through the high-frequency fins with steam, it becomes hot air. The hot air penetrates the tobacco leaf layer and takes away the moisture, achieving the purpose of drying the tobacco leaves. The fan in the rehumidification area rotates to drive the air flow. The flowing air carries the atomized water particles sprayed by the atomizing nozzle and becomes hot and humid air. The hot and humid air penetrates the tobacco leaf layer to meet its moisture absorption needs and achieve the effect of tobacco leaf rehumidification. The tobacco leaf redrying machine needs to use wind as a carrier for both drying and rehumidification of tobacco leaves. The quality of tobacco leaf redrying and rehumidification is closely related to the internal wind field.

[0003] However, unlike the drying area which has both air supply fans and dehumidification fans, the rehumidification area only has dehumidification fans, and the wind required for the water vapor circulation mainly comes from the atomizing nozzle. If the air volume in the rehumidification area is insufficient, the hot and humid air may not be able to penetrate the material layer on the side farther from the fan, resulting in an increase in the extreme difference in the moisture content of the tobacco leaves on the left, middle and right at the outlet of the redrying machine, which seriously restricts the realization of the homogenization processing of the tobacco leaves. In actual operation, the defect of insufficient air supply can be compensated to a certain extent by manually opening the deflector hood, but when manually operated, the opening of the deflector hood needs to be adjusted based on personal experience. Different people operating or failing to adjust in time may easily cause fluctuations in the processing quality of tobacco leaves. Summary of the invention

[0004] In view of the above-mentioned defects or shortcomings in the prior art, the present invention provides an automatic air supply device and tobacco redrying equipment for a tobacco redrying machine, which can solve the problems of insufficient air supply in the rehumidification zone and difficulty in controlling the air supply volume during the existing tobacco redrying process, thereby improving the rehumidification performance of tobacco leaves.

[0005] One aspect of the present invention provides an automatic air supply device for a tobacco redrying machine, comprising: a guide hood, a louver-type air supply device, a louver driving device and a lower computer; an air supply port is provided on the guide hood, the air supply port is provided near the atomizing nozzle in the rehumidification zone of the tobacco redrying machine, and the size of the air supply port is determined by the required air supply volume and the minimum wind speed of the air supply port; the louver-type air supply device comprises a plurality of louver blades and a linkage mechanism, the plurality of louver blades are connected to the louver driving device through the linkage mechanism, the louver driving device is used to drive the linkage mechanism to drive the plurality of louver blades to rotate, thereby adjusting the opening of the air supply port; the lower computer is used to control the action of the louver driving device.

[0006] Furthermore, the shutter-type air supply device is also provided with a shutter side frame, and the shutter side frame is located at both ends of the plurality of shutter blades; the shutter driving device is arranged on the shutter side frame; the linkage mechanism includes a driving gear and a driven gear, the driving shaft of the shutter driving device passes through the shutter side frame and is transmission-connected to the driving gear, the driving gear is meshed with the driven gear, and the driven gear is connected to the rotating shaft of the plurality of shutter blades.

[0007] Furthermore, the shutter driving device is arranged on the air deflector; the linkage mechanism includes a rocker arm, a universal coupling, a connecting rod, a support arm and a pin; the rocker arm is arranged on the driving shaft of the shutter driving device, the rocker arm is movably connected to the universal coupling, the universal coupling is movably connected to the connecting rod, the connecting rod is movably connected to the support arm through a pin, and one end of the support arm is fixed on the shutter blades; the rocker arm drives the connecting rod to telescopic movement through the universal coupling under the drive of the driving shaft, the connecting rod drives the support arm to move through the pin, and the support arm drives the shutter blades to open and close.

[0008] Furthermore, the support arms arranged on the shutter blades include a first support arm and a second support arm, the first support arm and the second support arm are arranged on both sides of the connecting rod, and the pin shaft passes through the first support arm, the second support arm and the connecting rod along the radial direction of the connecting rod.

[0009] Furthermore, the shutter driving device is a stepping motor with an encoder.

[0010] Furthermore, the first support arm and the second support arm are both L-shaped structural members with an obtuse angle.

[0011] Furthermore, the opening area of ​​the air supply port is calculated according to the following formula: in, Indicates the opening area of ​​the air supply port. Indicates the required air supply volume. Indicates the minimum wind speed at the air supply outlet.

[0012] Furthermore, the number of the driven gears is the same as the number of the shutter blades.

[0013] Another aspect of the present invention further provides a tobacco redrying device, comprising the above-mentioned automatic air supply device, a tobacco redrying machine and a host computer; the tobacco redrying machine comprises an inlet, a drying area, a cooling area, a rehumidification area and an outlet; the host computer is used to obtain in real time the inlet flow value, inlet moisture value, drying area temperature setting value, drying area temperature actual value, drying area fan speed, cooling area temperature, cooling area tobacco moisture value, cooling area tobacco moisture left-middle-right extreme difference, rehumidification area steam pressure setting value, rehumidification area steam actual value, outlet The outlet tobacco leaf moisture value, outlet temperature value, outlet temperature target value, outlet tobacco leaf moisture range left, middle and right, ambient temperature, ambient humidity and the air inlet opening value of the automatic air supply device; the collected process data are trained and analyzed by machine learning algorithm, and a tobacco leaf redrying and moisture regaining process control model is established; the required air inlet opening value is calculated by the outlet tobacco leaf moisture value, outlet tobacco leaf moisture range left, middle and right and outlet temperature target value, the air inlet opening value is converted into the stroke value of the shutter blades, and then the shutter drive device is controlled by the lower computer.

[0014] Furthermore, the host computer is also used to collect and centrally summarize the process data in a time-sharing manner according to the conveying speed of the tobacco leaves on the conveyor belt to ensure that the collected process data belongs to the same batch of tobacco leaves.

[0015] The automatic air supply device for a tobacco leaf redrying machine and the tobacco leaf redrying equipment provided by the present invention have the following beneficial effects: (1) An automatic air supply device is added to the rehumidification zone, which can effectively solve the problem of lack of air supply device in the rehumidification zone of the tobacco leaf redrying machine, increase the air volume in the rehumidification zone, and more wind energy reaches the material layer far away from the fan side, thereby reducing the extreme difference in moisture content of the left, middle and right of the tobacco leaves at the outlet of the redrying equipment, and improving the rehumidification quality of the tobacco leaves; (2) The automatic air supply device can realize real-time automatic control, avoiding fluctuations in tobacco processing quality caused by manual adjustment or untimely adjustment; (3) The air inlet of the automatic air supply device is set near the atomizing nozzle. The outside air that is obliquely introduced through the louver can reduce the temperature of the rehumidification zone and prevent the packaging temperature from being too high. The tangential wind has an induced effect on the atomized particles, improving the uniformity of air flow mixing, so that heat and humidity can be more evenly distributed on the surface of the tobacco leaves. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 is a schematic diagram of a gear-driven automatic air supply device for blinds provided by an embodiment of the present application; Figure 2 is a schematic diagram of an automatic air supply device for a swing-rod type blind provided by an embodiment of the present application; Figure 3 It is an overall schematic diagram of a tobacco leaf redrying device provided in one embodiment of the present application; Figure 4 This is a schematic diagram of the internal partitions of a tobacco leaf redrying device provided in one embodiment of the present application; Figure 5 This is a schematic diagram of a control system for tobacco redrying equipment provided in one embodiment of the present application. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. 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.

[0018] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention are also intended to include plural forms, unless the context clearly indicates other meanings.

[0019] It should be understood that although the terms first, second, third, etc. may be used to describe the acquisition modules in the embodiments of the present invention, the acquisition modules should not be limited to these terms. These terms are only used to distinguish the acquisition modules from each other.

[0020] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0021] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present invention are described at the angles shown in the drawings and should not be understood as limiting the embodiments of the present invention. In addition, in the context, it should also be understood that when it is mentioned that an element is formed "on" or "under" another element, it can not only be formed directly "on" or "under" another element, but also be formed "on" or "under" another element indirectly through an intermediate element.

[0022] See also Figure 1 An embodiment of the present application provides an automatic air supply device 100 for a tobacco redrying machine. The automatic air supply device 100 includes a guide cover 101, a gear-driven louver air supply device 102, a louver driving device 103 and a lower computer.

[0023] The air guide hood 101 is provided with an air supply port of a specific size, which is arranged near the atomizing nozzle in the rehumidification zone of the tobacco leaf redrying machine. The size of the air supply port is determined by the required air supply volume and the minimum wind speed of the air supply port. The required air supply volume and the minimum air velocity at the opening The decision can be made according to the following calculation formula:

[0024] The gear-driven shutter-type air supply device 102 is fixed at the above-mentioned air supply port.

[0025] Since the air supply inlet of the automatic air supply device 100 of this embodiment is arranged near the atomizing nozzle, the oblique introduction of external wind can reduce the temperature of the rehumidification zone and prevent the packaging temperature from being too high. The tangential wind of the shutter has an induced effect on the atomized particles, thereby improving the uniformity of air flow mixing and allowing heat and humidity to be more evenly distributed on the surface of the tobacco leaves.

[0026] Furthermore, the gear-driven louver-type air supply device 102 includes a plurality of louver blades 1021 and a linkage mechanism 1022. The plurality of louver blades 1021 are connected to a louver driving device 103 via the linkage mechanism 1022. The louver driving device 103 is used to drive the linkage mechanism 1022 to drive the plurality of louver blades 1021 to rotate, thereby adjusting the opening of the air supply port.

[0027] Furthermore, the gear-driven louver-type air supply device 102 is also provided with a louver side frame 1023, and the louver side frame 1023 is located at the left and right ends of the plurality of louver blades 1021. The louver driving device 103 is arranged on the louver side frame 1023. The linkage mechanism 1022 includes a driving gear 10221 and a driven gear 10222. The driving shaft of the louver driving device 103 passes through the louver side frame 1023 and is transmission-connected with the driving gear 10221. The driving gear 10221 is meshed with the driven gear 10222, and the driven gear 10222 is connected with the rotating shafts of the plurality of louver blades 1021. Preferably, the number of the driven gears 10222 is the same as the number of the louver blades 1021, and each driven gear 10222 is installed on the rotating shaft of the corresponding louver blade 1021.

[0028] Optionally, the shutter driving device 103 is a stepping motor with an encoder, which can of course be replaced by a servo motor.

[0029] Furthermore, the lower computer is used to control the shutter driving device 103 to drive the linkage mechanism 1022. The lower computer can be a PLC controller, a single chip microcomputer, a DSP, a CPLD, a FPGA or other microcontrollers.

[0030] See also Figure 2 Another embodiment of the present application further provides an automatic air supply device 200 for a tobacco leaf redrying machine, the automatic air supply device 200 comprises a guide cover 201, a swing rod type shutter air supply device 202, a shutter driving device 203 and a lower computer. The structure of the guide cover 201 and the air supply port thereon is consistent with that of the automatic air supply device 100, and will not be described in detail here.

[0031] The shutter driving device 203 of the automatic air supply device 200 in this embodiment is arranged on the air guide cover 201. The swing rod type shutter air supply device 202 includes a plurality of shutter blades 2021 and a linkage mechanism 2022. The plurality of shutter blades 2021 are connected to the shutter driving device 203 through the linkage mechanism 2022. The shutter driving device 203 is used to drive the linkage mechanism 2022 to drive the plurality of shutter blades 2021 to rotate, thereby adjusting the opening of the air supply port.

[0032] Furthermore, the linkage mechanism 2022 includes a swing rod 20221, a universal coupling 20222, a connecting rod 20223, a support arm 20224 and a pin 20225. The swing rod 20221 is disposed on the driving shaft of the shutter driving device 203, the swing rod 20221 is movably connected to the universal coupling 20222, the universal coupling 20222 is movably connected to the connecting rod 20223, the connecting rod 20223 is movably connected to the support arm 20224 via the pin 20225, and one end of the support arm 20224 is fixed to the shutter blade 2021. The swing rod 20221 drives the connecting rod 20223 to move telescopically through the universal coupling 20222 under the drive of the driving shaft. The connecting rod 20223 drives the supporting arm 20224 to move through the pin 20225. The supporting arm 20224 drives the shutter blades 2021 to open and close.

[0033] Preferably, the support arm 20224 arranged on the shutter blade 2021 includes a first support arm and a second support arm, and the first support arm and the second support arm are located on both sides of the axis of the connecting rod 20223 to ensure the stability of the linkage, and the pin shaft 20225 passes through the first support arm, the second support arm and the connecting rod 20223 along the radial direction of the connecting rod 20223.

[0034] Preferably, the first support arm and the second support arm are both L-shaped structural members with an obtuse angle. This structure is more conducive to the connecting rod 20223 driving the two support arms to realize the opening and closing action of the shutter blades 2021.

[0035] Optionally, the shutter driving device 203 is a stepping motor with an encoder, which can of course be replaced by a servo motor.

[0036] Furthermore, the lower computer is used to control the shutter driving device 203 to drive the linkage mechanism 2022. The lower computer can be a PLC controller, a single chip microcomputer, a DSP, a CPLD, a FPGA or other microcontrollers.

[0037] See also Figure 3 Another embodiment of the present application further provides a tobacco leaf redrying device 300, comprising any of the automatic air supply devices 301, a tobacco leaf redrying machine 302 and a host computer in the above two embodiments. Figure 4 The interior of the tobacco redrying machine 302 is divided into an entrance, a drying area, a cooling area, a rehumidification area and an exit, wherein multiple drying areas and rehumidification areas can be provided. The flow processing process of tobacco inside the tobacco redrying machine 302 belongs to the prior art and will not be described here.

[0038] See also Figure 5 The control system of the tobacco redrying equipment includes an upper computer 401, a lower computer 402, a process parameter acquisition sensor 403 and a shutter driving device 404 as an actuator.

[0039] The upper computer 401 is used to obtain the inlet flow value, inlet moisture value, drying zone temperature setting value, drying zone temperature actual value, drying zone fan speed, cooling zone temperature, cooling zone tobacco moisture value, cooling zone tobacco moisture left-center-right extreme difference, rehumidification zone steam pressure setting value, rehumidification zone steam actual value, outlet tobacco moisture value, outlet temperature value, outlet temperature target value, outlet tobacco moisture left-center-right extreme difference, ambient temperature, ambient humidity and air supply port opening value of the automatic air supply device through the lower computer 402 (or not through the lower computer 402) and the process parameter acquisition sensor 403 in real time; use the machine learning algorithm to train and analyze the collected process data to establish a tobacco redrying and rehumidification process control model; calculate the required air supply port opening value through the outlet tobacco moisture value, outlet tobacco moisture left-center-right extreme difference and outlet temperature target value, convert the air supply port opening value into the stroke value of the shutter blades, and control the shutter blades by controlling the shutter drive device 404 through the lower computer 402.

[0040] More preferably, the host computer 401 is also used to collect and centrally summarize the process data in a time-sharing manner according to the conveying speed of the tobacco leaves on the conveyor belt, so as to ensure that the collected process data belongs to the same batch of tobacco leaves.

[0041] The operation flow of the apparatus / device in the above embodiment is exemplarily described below.

[0042] Step S101, installing and arranging a shutter air supply device in the moisture regaining area, using PLC to control the operation of the shutter drive device in the moisture regaining area, and connecting the shutter drive device to the control system of the tobacco redrying machine; Step S102, determining the correspondence between the stroke of the shutter driving device and the opening of the air supply port of the shutter air supply device; Step S103, through the PLC control system and the tobacco leaf redrying machine process parameter collection sensor, the tobacco leaf redrying machine inlet flow, inlet moisture, drying zone temperature setting value, drying zone temperature actual value, drying zone fan speed, cooling zone temperature, cooling zone moisture value, cooling zone tobacco leaf moisture left-middle-right extreme difference, rehumidification zone steam pressure setting value, rehumidification zone steam pressure actual value, shutter air supply device air supply port opening, outlet tobacco leaf moisture value, outlet temperature value, outlet tobacco leaf moisture left-middle-right extreme difference, ambient temperature, ambient humidity and automatic air supply device air supply port opening value are collected in real time. Since tobacco leaves are transported on the conveyor belt of the redrying equipment, different parameters have time lags. In order to collect the processing parameters of the same batch of tobacco leaves, the time of data collection of different sensors needs to be considered;

[0043] Step S104, sending the process parameter data acquired by the lower computer to the upper computer, and the upper computer uses a machine learning algorithm to train and analyze the process data of the tobacco redrying equipment to establish a tobacco redrying moisture regain control model; Step S105, the host computer calculates the required air inlet opening using the tobacco leaf redrying and moisture regain control model, and inputs the corresponding shutter blade stroke value information into the shutter drive device through the PLC control system to achieve real-time control of the air inlet opening.

[0044] The above description is only a preferred embodiment of the present invention. Those skilled in the art should understand that the scope of disclosure involved in the present invention is not limited to the technical solution formed by a specific combination of the above technical features, but also should cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present invention (but not limited to) to form a technical solution.

Claims

1. An automatic air supply device for a tobacco leaf redrying machine, characterized in that: include: Air guide hood, shutter-type air supply device, shutter drive device and lower machine; The guide cover is provided with an air supply port, which is arranged close to the atomizing nozzle in the rehumidification zone of the tobacco leaf redrying machine, and the size of the air supply port is determined by the required air supply volume and the minimum wind speed of the air supply port; The shutter type air supply device comprises a plurality of shutter blades and a linkage mechanism, wherein the plurality of shutter blades are connected to the shutter driving device through the linkage mechanism, and the shutter driving device is used to drive the linkage mechanism to drive the plurality of shutter blades to rotate, thereby adjusting the opening of the air supply port; The lower computer is used to control the action of the shutter driving device.

2. The automatic air supply device for a tobacco redrying machine according to claim 1, characterized in that: The shutter-type air supply device is also provided with shutter side frames, and the shutter side frames are located at both ends of the plurality of shutter blades; The shutter driving device is arranged on the shutter side frame; The linkage mechanism includes a driving gear and a driven gear. The driving shaft of the shutter driving device passes through the shutter side frame and is transmission-connected to the driving gear. The driving gear meshes with the driven gear, and the driven gear is connected to the rotating shafts of the plurality of shutter blades.

3. The automatic air supply device for a tobacco redrying machine according to claim 1, characterized in that: The shutter driving device is arranged on the air guide cover; The linkage mechanism includes a rocker arm, a universal coupling, a connecting rod, a support arm and a pin; The swing rod is arranged on the driving shaft of the shutter driving device, the swing rod is movably connected to the universal coupling, the universal coupling is movably connected to the connecting rod, the connecting rod is movably connected to the support arm through a pin shaft, and one end of the support arm is fixed on the shutter blade; The swing arm drives the connecting rod to move telescopically through the universal coupling under the drive of the driving shaft, and the connecting rod drives the supporting arm to move through the pin shaft, and the supporting arm drives the shutter blades to open and close.

4. The automatic air supply device for a tobacco leaf redrying machine according to claim 3, characterized in that: The support arms arranged on the shutter blades include a first support arm and a second support arm, the first support arm and the second support arm are arranged on both sides of the connecting rod, and the pin passes through the first support arm, the second support arm and the connecting rod along the radial direction of the connecting rod.

5. The automatic air supply device for a tobacco redrying machine according to claim 1, characterized in that: The shutter driving device is a stepping motor with an encoder.

6. The automatic air supply device for a tobacco redrying machine according to claim 4, characterized in that: The first support arm and the second support arm are both L-shaped structural members with an obtuse angle.

7. The automatic air supply device for a tobacco redrying machine according to claim 1, characterized in that: Calculate the air inlet opening area according to the following formula: in, Indicates the opening area of ​​the air supply port. Indicates the required air supply volume. Indicates the minimum wind speed at the air supply outlet.

8. The automatic air supply device for a tobacco redrying machine according to claim 2, characterized in that: The number of the driven gears is the same as the number of the shutter blades.

9. A tobacco leaf redrying device, characterized in that: The invention comprises the automatic air supply device for a tobacco redrying machine according to any one of claims 1 to 8, the tobacco redrying machine and a host computer; The tobacco leaf redrying machine comprises an inlet, a drying area, a cooling area, a rehumidification area and an outlet; The host computer is used to obtain in real time the inlet flow value, inlet moisture value, drying zone temperature setting value, drying zone temperature actual value, drying zone fan speed, cooling zone temperature, cooling zone tobacco moisture value, cooling zone tobacco moisture left-center-right extreme difference, rehumidification zone steam pressure setting value, rehumidification zone steam actual value, outlet tobacco moisture value, outlet temperature value, outlet temperature target value, outlet tobacco moisture left-center-right extreme difference, ambient temperature, ambient humidity and air supply port opening value of the automatic air supply device of the tobacco leaf redrying machine; use machine learning algorithms to train and analyze the collected process data, and establish a tobacco leaf redrying and rehumidification process control model; The required air inlet opening value is calculated by the outlet tobacco leaf moisture value, the left-middle-right extreme difference of the outlet tobacco leaf moisture and the outlet temperature target value, and the air inlet opening value is converted into the stroke value of the shutter blades, and then the shutter drive device is controlled by the lower computer.

10. The tobacco leaf redrying equipment according to claim 9, characterized in that: The host computer is also used to collect and centrally summarize process data in different time periods according to the conveying speed of tobacco leaves on the conveyor belt to ensure that the collected process data belongs to the same batch of tobacco leaves.

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