Device for reducing amount of cut tobaccos at dry head and dry tail of thin-plate cut tobacco dryer

Abstract

The utility model discloses a device for reducing the amount of dry-head and dry-tail tobacco shreds of a thin-plate cut-tobacco dryer. The device comprises an air direction switching assembly arranged in a hot air pipeline of the cut-tobacco dryer and a blowing assembly installed on the feed port side of a cut-tobacco drying cylinder. Wherein the wind direction switching assembly comprises a downstream hot blast valve and a countercurrent hot blast valve; the blowing assembly comprises a pressure regulating valve, an electromagnetic valve, a compressed air conveying pipeline and an air nozzle communicated to the interior of a cut-tobacco dryer roller, the air nozzle is connected with the compressed air conveying pipeline, and the compressed air conveying pipeline is connected with a compressed air source sequentially through the electromagnetic valve and the pressure regulating valve; and an original machine PLC (Programmable Logic Controller) of the cut-tobacco drier is respectively connected with the electromagnetic valve and the downstream hot blast valve or the countercurrent hot blast valve through electric signals. The device effectively reduces the amount of dry-head and dry-tail cut tobaccos generated in the production process of the thin-plate cut tobacco dryer, so that the cut tobacco yield is improved, and the material loss is reduced.

Description

Technical Field

[0001] The utility model relates to the field of cigarette manufacturing, in particular to a device for reducing the amount of dry head and dry tail tobacco in a thin plate tobacco drying machine. Background Art

[0002] In the process of cigarette making, the thin-plate tobacco drying machine (such as but not limited to KLD-2) is one of the key equipment in the tobacco production process. It is suitable for low-temperature and low-intensity drying of tobacco, improving and enhancing the appearance quality of tobacco, improving the filling capacity and processing resistance of tobacco to meet the requirements of cigarette making process, and plays an important role in the quality of tobacco.

[0003] The thin-plate tobacco drying machine adopts the downwind drum structure design. The tobacco is fed to the drying machine through the opening in the inlet shroud plate by a vibrating trough conveyor. The tobacco is continuously transported by a rotating drum. The drum wall is equipped with a heated stir-frying plate. When the drum rotates, the stir-frying plate drives the tobacco to rotate together and transports the tobacco forward through the drum slope. Due to the rotation of the drum and its inclination, the tobacco is always in contact with the steam-heated stir-frying plate of the drum. During this process, the tobacco is stirred and evenly heated; in addition, the hot air system uses a fan to send ambient air into a steam-heated heat exchanger, where the air is heated and then introduced into the drum, so that the moisture in the material is converted into steam and discharged into the surrounding external environment, and then the steam is sucked away from the surface of the material by a dehumidification pipeline, thereby controlling the moisture content of the tobacco, improving and enhancing the sensory quality of the leaf, and improving the filling capacity and processing resistance of the leaf, so as to achieve the coordination of the two.

[0004] However, due to the working principle of the thin-plate drying machine, the following phenomena occur in the actual drying process:

[0005] (1) At the beginning of the material stage, the amount of material entering the drum is small. At this time, the small amount of material will quickly dry and dehydrate after contacting the high-temperature drum wall to form dry tobacco;

[0006] (2) At the tail stage, although the steam valve is closed, the wall temperature is still high. At this time, the amount of material is small, which causes the tobacco to dry out quickly, resulting in too low moisture content in the tobacco and the appearance of dry tail tobacco.

[0007] The dry ends and dry tails of tobacco that are below the process standard are all unqualified tobacco, which will increase the material breakage and seriously affect the internal quality and taste of tobacco. Therefore, the dry ends and dry tails of tobacco will be removed from the production line on the vibrating conveyor after the tobacco drying machine. However, due to the process capacity limitations of tobacco drying equipment, there is still no reliable solution to completely eliminate the production of dry ends and dry tails of tobacco. Therefore, it is necessary to study how to minimize the production of dry ends and dry tails of tobacco and explore a suitable solution to reduce the production of dry ends and dry tails of tobacco. Utility Model Content

[0008] In view of the above, the utility model aims to provide a device for reducing the amount of dry head and dry tail tobacco in a thin-plate tobacco drying machine, so as to solve the technical problems mentioned above.

[0009] The technical solution adopted by the utility model is as follows:

[0010] The utility model provides a device for reducing the amount of dried tobacco at the end of a thin-plate tobacco drying machine, comprising: an air direction switching component arranged in a hot air pipeline of the tobacco drying machine, and a blowing component installed at the feeding port side of a tobacco drying cylinder;

[0011] The wind direction switching component includes a downstream hot air valve and a reverse hot air valve; the blowing component includes a pressure regulating valve, a solenoid valve, a compressed air transmission pipeline and an air jet connected to the drum of the toaster, wherein the air jet is connected to the compressed air transmission pipeline, and the compressed air transmission pipeline is connected to the compressed air source in sequence through the solenoid valve and the pressure regulating valve;

[0012] The original PLC of the wire drying machine is respectively connected with the solenoid valve and the downstream hot air valve or the reverse hot air valve by electrical signals.

[0013] In at least one possible implementation manner, a connecting rod mechanism is provided between the downstream hot air valve and the reverse hot air valve to link the two valves.

[0014] In at least one possible implementation, the air jet includes an air amplifier.

[0015] In at least one possible implementation, the device further includes a first timer connected to the original machine PLC electrical signal, and is used to set the duration for keeping the forward hot air valve in a closed state.

[0016] In at least one possible implementation, the device further includes a second timer connected to the original machine PLC electrical signal, for setting a trigger time for starting the spray assembly.

[0017] In at least one possible implementation, the blowing assembly includes three groups of solenoid valves, three groups of compressed air delivery pipelines, and three groups of air jets, and the three groups of air jets are set at different heights on the feed port side.

[0018] In at least one possible implementation manner, the device further includes a third timer connected to the original machine PLC electrical signal, and is used to set the working time of a single solenoid valve.

[0019] In at least one possible implementation manner, the downstream hot air valve and the upstream hot air valve are both butterfly valves.

[0020] Compared with the prior art, the main design concept of the utility model is that in the initial stage of the production of the thin plate wire drying machine, the hot air direction in the cylinder is formed into a headwind, and the material in the head stage will be affected by the positive pressure in the cylinder to increase the amount of tobacco entering the drum per unit time, thereby reducing the probability of a small amount of tobacco contacting the high-temperature cylinder wall, thereby reducing the production of dry head tobacco; in the tail stage, the air amplifier is used to spray the tail material, so that the material can pass through the drum quickly, reducing the time the material is in contact with the frying plate and the cylinder wall, thereby reducing the production of dry tail tobacco. The utility model effectively reduces the amount of dry head and dry tail tobacco produced in the production process of the thin plate wire drying machine, thereby improving the wire output rate and reducing material loss. According to actual tests, after the utility model device is applied to the wire drying process, the average weight of dry head and dry tail tobacco produced in each batch is reduced from 30 kg to 7 kg, which significantly reduces the production of unqualified tobacco. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described below in conjunction with the accompanying drawings, in which:

[0022] Figure 1 A schematic diagram of a wind direction switching assembly provided in an embodiment of the utility model (normal production stage);

[0023] Figure 2 A schematic diagram of a spray assembly provided in an embodiment of the utility model;

[0024] Figure 3 A schematic diagram of a wind direction switching assembly provided in an embodiment of the utility model (head stage). DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0026] The utility model proposes an embodiment of a device for reducing the amount of dried tobacco at the beginning and end of a thin-plate tobacco drying machine. Specifically, Figure 1 and Figure 2As shown, it includes: a wind direction switching component arranged in the hot air pipeline 1 of the wire drying machine, and a blowing component installed on the feeding port side of the wire drying drum for blowing the materials in the final stage of the thin plate wire drying machine production; wherein the wind direction switching component includes a downstream hot air valve 2 and a reverse hot air valve 4 (the above two valves can be selected as butterfly valves); the blowing component mainly includes a pressure regulating valve 5, a solenoid valve 6, a compressed air transmission pipeline 7 and an air jet 8 connected to the wire drying machine drum, wherein the air jet 8 is installed on the frame and connected to the compressed air transmission pipeline 7, and the compressed air transmission pipeline 7 is connected to an external compressed air source via the solenoid valve 6 and the pressure regulating valve 5 in turn.

[0027] In some preferred embodiments, the jet port 8 includes an air amplifier, which can effectively guide natural air and increase the pressure of the injected compressed air.

[0028] Continuing from the above, the original PLC of the tofu drying machine is respectively connected with the solenoid valve 6 and the downstream hot air valve 2 or the reverse hot air valve 4 by electrical signals to realize the function of electrically controlling the valve movement.

[0029] It can be pointed out here that in some preferred embodiments of the present utility model, a connecting rod mechanism 3 is provided between the downstream hot air valve 2 and the upstream hot air valve 4 to enable the two valves to form a linkage. Figure 3 Taking the material head stage as an example, the downstream hot air valve 2 can be closed under the drive of an electrical signal. At this time, the countercurrent hot air valve 4 can be driven to open by the mechanical operation of the connecting rod mechanism 3. The wind direction indicated by the arrow can form a reverse process hot air, so that the material entering the drying drum at the material head stage is affected by the current positive pressure in the drum to slow down the feeding speed, thereby increasing the amount of material entering the drum, thereby avoiding the situation where a small amount of tobacco contacts the high-temperature frying plate and the drum wall, and then reducing the production of dry tobacco. It should be pointed out here that the length and action of the connecting rod structure and the state of triggering the two valves can be pre-calibrated as needed. For example, it can be designed that when the downstream hot air valve 2 is in the closed state, the countercurrent hot air valve 4 is driven by the connecting rod mechanism 3 to open a relatively large amplitude, and when the downstream hot air valve 2 is in the open state, the countercurrent hot air valve 4 is not closed, but is driven by the connecting rod mechanism 3 to open a relatively small amplitude.

[0030] In this regard, considering the material travel speed, the device may further include a first timer connected to the original machine PLC electrical signal, which is used to set the time for keeping the forward hot air valve in the closed state. After the timer is reached (such as 2 minutes), the forward hot air valve can be driven to open. Figure 1 The arrows indicate the hot air flow direction of the process in the normal production stage (not the head and tail stage). In actual operation, the first timer can be implemented by a time delay relay.

[0031] It can be added here that the determination of whether the material is in the head stage or the tail stage can be made with the help of existing original machine parts and signals, such as but not limited to connecting the flow signal of the electronic belt scale material to the device. Corresponding to the above, the device can also include a second timer connected to the original machine PLC electrical signal, which is used to set the trigger time for the start of the blowing component. Specifically, when the signal indicates the tail stage, the timing is performed, and after the second timer setting time (such as 30 seconds) is reached, it indicates that the material has reached the entrance of the drying drum (drum), and at this time, the blowing component can be triggered to blow air into the drum. Similarly, the second timer can also be implemented using a delay relay.

[0032] Therefore, in order to improve the blowing effect at the tail stage, in combination with the diagram, the blowing assembly includes three groups of solenoid valves 6, three groups of corresponding compressed air transmission pipelines 7 and three groups of air jets 8, and the three groups of air jets 8 are set at different heights on the feed port side, so as to provide sufficient and all-round blowing effects. On the basis of this preferred embodiment, the device can also include a third timer connected to the original machine PLC electrical signal, and its function is to set the working time of a single solenoid valve. Here, the three third timers are taken as an example. In actual operation, the first solenoid valve 6 can be closed after blowing for 60 seconds, and the second solenoid valve 6 can be opened, and then the second solenoid valve 6 can be closed after blowing for 60 seconds, and then the third solenoid valve 6 can be opened and closed after blowing for 60 seconds, and the blowing operation is completed.

[0033] In summary, the main design concept of the utility model is that in the initial stage of the production of the thin plate drying machine, the hot air direction in the drum is formed into a headwind, and the material in the head stage will be affected by the positive pressure in the drum to increase the amount of tobacco entering the drum per unit time, thereby reducing the probability of a small amount of tobacco contacting the high-temperature drum wall, thereby reducing the production of dry head tobacco; in the tail stage, the air amplifier is used to spray the tail material, so that the material can pass through the drum quickly, reducing the time the material is in contact with the frying plate and the drum wall, thereby reducing the production of dry tail tobacco. The utility model effectively reduces the amount of dry head and dry tail tobacco produced in the production process of the thin plate drying machine, thereby improving the silk output rate and reducing material loss.

[0034] If the expressions of orientation are mentioned in the embodiments of the present invention, they are relative concepts based on the embodiments. In addition, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, a and b, a and c, b and c, or a and b and c, wherein a, b, c can be single or multiple.

[0035] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings, but the above is only a preferred embodiment of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred methods can be reasonably combined and matched into a variety of equivalent schemes by those skilled in the art without departing from or changing the design concept and technical effects of the present invention; therefore, the present invention is not limited to the scope of implementation as shown in the drawings, and all changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the specification and drawings, should be within the protection scope of the present invention.

Claims

1. A device for reducing the amount of dried tobacco at the beginning and end of a thin-plate tobacco drying machine, characterized in that: include: An air direction switching component arranged in the hot air pipeline of the wire drying machine, and a blowing component installed on the feeding port side of the wire drying cylinder; The wind direction switching assembly includes a downstream hot air valve and a reverse hot air valve; the blowing assembly includes a pressure regulating valve, a solenoid valve, a compressed air transmission pipeline, and an air jet connected to the drum of the toaster, wherein the air jet is connected to the compressed air transmission pipeline, and the compressed air transmission pipeline is connected to the compressed air source in sequence through the solenoid valve and the pressure regulating valve; The original PLC of the wire drying machine is respectively connected with the solenoid valve and the downstream hot air valve or the reverse hot air valve by electrical signals.

2. The device for reducing the amount of dried tobacco at the beginning and end of the thin-plate tobacco drying machine according to claim 1 is characterized in that: A connecting rod mechanism is provided between the downstream hot air valve and the reverse hot air valve to link the two valves.

3. The device for reducing the amount of dried tobacco at the beginning and end of the thin-plate tobacco drying machine according to claim 1 is characterized in that: The air jet includes an air amplifier.

4. The device for reducing the amount of dried tobacco at the beginning and end of the thin-plate tobacco drying machine according to claim 1 is characterized in that: The device also includes a first timer connected to the original machine PLC electrical signal, which is used to set the time length for keeping the downstream hot air valve in a closed state.

5. The device for reducing the amount of dried tobacco at the beginning and end of the thin-plate tobacco drying machine according to claim 1 is characterized in that: The device also includes a second timer connected to the original machine PLC electrical signal, which is used to set the trigger time for starting the spraying component.

6. The device for reducing the amount of dried tobacco at the beginning and end of the thin-plate tobacco drying machine according to claim 1, characterized in that: The spray assembly includes three groups of solenoid valves, three groups of compressed air delivery pipelines and three groups of jet ports, and the three groups of jet ports are arranged at different heights on the feed port side.

7. The device for reducing the amount of dried tobacco at the beginning and end of the thin-plate tobacco drying machine according to claim 6 is characterized in that: The device also includes a third timer connected to the original machine PLC electrical signal and used for setting the working time of a single solenoid valve.

8. The device for reducing the amount of dried tobacco at the beginning and end of a thin-plate tobacco drying machine according to any one of claims 1 to 7, characterized in that: The downstream hot air valve and the upstream hot air valve are both butterfly valves.

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