Primary stem pretreatment device after threshing

Abstract

The utility model discloses a threshed raw stem pretreatment device, which is arranged between a tobacco stem vibrating screen conveyor and a tobacco stem redrying machine of a threshing unit, and comprises lifting feeding equipment, weighing equipment, warming and humidifying equipment and tobacco stem extruding equipment, the feeding end of the lifting feeding device is connected with the discharging end of a tobacco stem vibrating screen conveyor of the threshing unit through a first conveying mechanism, a quantity limiting pipe is arranged at a discharging port of the lifting feeding device, the feeding end of the weighing device is located below the quantity limiting pipe, and the feeding end of the heating and humidifying device is connected with the discharging end of the weighing device. The discharging end of the temperature and humidity increasing device is connected with the feeding end of the tobacco stem extruding device through a second conveying mechanism, and the discharging end of the tobacco stem extruding device is connected with the feeding end of the tobacco stem redrying machine through a third conveying mechanism. Compared with the prior art, the tobacco stem cutting device has the advantages that the problem that moisture inside and outside tobacco stems is poor before stem cutting is solved, and the quality stability and the internal quality of cut stems are improved.

Description

Technical Field

[0001] The utility model relates to a pre-treatment device for original cigarette stems, in particular to a pre-treatment device for original cigarette stems after threshing. Background Art

[0002] Cigarette stems are one of the main raw materials in cigarette factories and play an important role in aspects such as cost reduction, efficiency improvement, tar reduction, harm reduction, and smoke balance of cigarettes. With the development requirements of high-availability cut tobacco for cigarette products, increasing attention has been paid to the processing quality of cigarette stems, especially the stability of cut tobacco quality and the improvement of internal quality. The cigarette stem raw material is the basic guarantee for the quality of cut tobacco, and threshing and redrying are the key to determining the quality of cigarette stem raw materials. The existing cigarette stem raw materials directly dry the original stems after threshing through a cigarette stem redryer. After dehydration, the moisture content of the cigarette stems is usually about 10%. Considering that cigarette stems contain a large amount of cellulose and lignin, with a rigid structure and relatively low moisture content, when the cigarette factory raises the moisture content of the cigarette stems to about 36% to meet the requirements of cut tobacco production, the situation of low internal moisture and high external moisture in the cigarette stem tissue will occur, resulting in uneven moisture content of cut tobacco and a large amount of stem chips in the cut tobacco, which significantly affects the quality of cut tobacco.

[0003] Currently, in order to solve the problem of the internal and external moisture difference of cigarette stems before cutting, cigarette factories usually adopt the following methods: optimizing and adjusting the process parameters of processes such as water washing, temperature increase and moisture regain, and storage of the cut tobacco section. A few factories adopt the method of multiple heating and humidification. These methods will cause adverse effects such as increased equipment investment, increased carbon emissions, and extended production time. At the same time, their effect on reducing the internal and external moisture difference of cigarette stems before cutting is not significant, which is not conducive to large-scale popularization and application. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a pre-treatment device for original cigarette stems after threshing to solve the problem of the internal and external moisture difference of cigarette stems before cutting and achieve the purpose of improving the stability and internal quality of cut tobacco quality.

[0005] The utility model is realized through the following technical solutions:

[0006] A pre-treatment device for original stems after threshing, comprising a vibrating screen conveyor for tobacco stems of a threshing unit and a tobacco stem re-dryer. A pre-treatment device for original stems after threshing is provided between the vibrating screen conveyor for tobacco stems of the threshing unit and the tobacco stem re-dryer. The pre-treatment device for original stems after threshing includes a lifting and feeding device, a weighing device, a temperature and humidity increasing device, and a tobacco stem extrusion device. The feeding end of the lifting and feeding device is connected to the discharging end of the vibrating screen conveyor for tobacco stems of the threshing unit through a first conveying mechanism. A limiting pipe extending downward is provided at the discharging port of the lifting and feeding device. The feeding end of the weighing device is located below the limiting pipe. The feeding end of the temperature and humidity increasing device is connected to the discharging end of the weighing device. The discharging end of the temperature and humidity increasing device is connected to the feeding end of the tobacco stem extrusion device through a second conveying mechanism. The discharging end of the tobacco stem extrusion device is connected to the feeding end of the tobacco stem re-dryer through a third conveying mechanism.

[0007] As a preferred solution of the above device, the second conveying mechanism includes a distributing vibrating conveyor. A first discharging port is opened at the bottom wall of the middle section of the vibrating trough of the distributing vibrating conveyor, and the open end of the vibrating trough of the distributing vibrating conveyor serves as a second discharging port. The tobacco stem extrusion device includes two tobacco stem extruders arranged side by side. The feeding ends of the two tobacco stem extruders are respectively connected to the two discharging ports of the distributing vibrating conveyor through their respective feeding conveyors.

[0008] As a preferred solution of the above device, a moisture meter is provided above the weighing device near the discharging end, and a moisture and temperature meter and a magnet are provided on the second conveying mechanism.

[0009] As a preferred solution of the above device, the weighing device is an electronic belt scale.

[0010] As a preferred solution of the above device, a photoelectric switch is provided inside the limiting pipe.

[0011] As a preferred solution of the above device, the first conveying mechanism includes a first belt conveyor and a second belt conveyor connected perpendicularly. The feeding end of the first belt conveyor is connected to the discharging end of the vibrating screen conveyor for tobacco stems of the threshing unit, and the discharging end of the second belt conveyor is connected to the feeding end of the lifting and feeding device.

[0012] As a preferred solution of the above device, the conveying direction of the first belt conveyor extends in the front-rear direction, the conveying direction of the second belt conveyor extends in the left-right direction and is located in front of the first belt conveyor. The lifting and feeding device, the weighing device, the temperature and humidity increasing device, and the second conveying mechanism are arranged in a row from left to right. The two tobacco stem extruders are arranged side by side in the left-right direction, and the two tobacco stem extruders are located behind the distributing vibrating conveyor and in front of the tobacco stem re-dryer.

[0013] As a preferred solution of the above device, the second conveying mechanism includes a first vibrating conveyor and a distributing vibrating conveyor connected in sequence in the left-right direction.

[0014] As a preferred embodiment of the above device, the third conveying mechanism includes a second vibrating conveyor, a third vibrating conveyor, a third belt conveyor, a fourth belt conveyor, and a fifth belt conveyor that are connected in sequence. The second vibrating conveyor is located below the discharge ports of two tobacco stem extruders. The second vibrating conveyor, the third vibrating conveyor, and the third belt conveyor are connected in sequence from right to left. The fourth belt conveyor conveys from front to back, and the fifth belt conveyor conveys from left to right. The feeding section of the tobacco stem re-dryer is connected to the discharge end of the fifth belt conveyor.

[0015] As a preferred embodiment of the above device, the temperature and humidity increasing device adopts a tunnel-type temperature and humidity increasing device.

[0016] The present utility model has the following advantages compared with the prior art:

[0017] A pre-treatment device for raw tobacco stems after threshing provided by the present utility model adds a pre-treatment device for raw tobacco stems after threshing between the tobacco stem vibrating screen conveyor of the threshing unit and the tobacco stem re-dryer. First, the temperature and humidity of the raw tobacco stems after threshing are increased by a temperature and humidity increasing device, and then the temperature and humidity increased raw tobacco stems are extruded by a tobacco stem extrusion device, and then sent to the tobacco stem re-dryer for re-drying. In this way, the fiber tissue structure of the raw tobacco stems is deformed, so that in the subsequent tobacco stem cutting process, moisture can quickly and efficiently penetrate into the tobacco stem tissue, fundamentally solving the problem of the moisture difference inside and outside the tobacco stems before cutting the tobacco stem shreds. At the same time, it also reduces carbon emissions, shortens the production time, improves the moisture uniformity of the cut tobacco stem shreds, reduces the content of tobacco stem chips in the tobacco stem shreds, and improves the stability of the quality and the inherent quality of the tobacco stem shreds. Description of the Drawings

[0018] Figure 1 is a top view of the present utility model.

[0019] Figure 2 is a front view of the connection of each component before the tobacco stem extrusion device of the present utility model.

[0020] Figure 3 is a side view of the connection part before and after the tobacco stem extrusion device of the present utility model.

[0021] Figure 4 is a front view of the connection of each component after the tobacco stem extrusion device of the present utility model.

[0022] Figure 5 is an electron micrograph of the raw tobacco stems after threshing output by the tobacco stem vibrating screen conveyor of the threshing unit.

[0023] Figure 6 is an electron micrograph of the finished tobacco stems after pre-treatment by the present utility model and after re-drying.

[0024] Reference Numerals in the Figures: 1. Tobacco Stem Vibrating Screen Conveyor of Threshing Unit; 2. Tobacco Stem Re-dryer; 3. Feeding Equipment for Elevation; 4. Weighing Equipment; 5. Temperature and Humidity Increasing Equipment; 6. Tobacco Stem Extrusion Equipment; 7. Limiting Tube; 8. Moisture Meter; 9. Moisture and Temperature Meter; 10. Magnet; 11. First Belt Conveyor; 12. Second Belt Conveyor; 13. First Vibrating Conveyor; 14. Material Dividing Vibrating Conveyor; 15. First Discharge Opening; 16. Second Discharge Opening; 17. Tobacco Stem Extruder; 18. Feed Conveyor; 19. Second Vibrating Conveyor; 20. Third Vibrating Conveyor; 21. Third Belt Conveyor; 22. Fourth Belt Conveyor; 23. Fifth Belt Conveyor. Detailed Embodiment

[0025] The embodiments of the present utility model will be described in detail below. These embodiments are implemented on the premise of the technical solution of the present utility model, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present utility model is not limited to the following embodiments.

[0026] Refer to Figures 1 to 4 , this embodiment discloses a pre-treatment device for original tobacco stems after threshing, including a tobacco stem vibrating screen conveyor 1 of a threshing unit and a tobacco stem re-dryer 2. A pre-treatment device for original tobacco stems after threshing is arranged between the tobacco stem vibrating screen conveyor 1 of the threshing unit and the tobacco stem re-dryer 2. The pre-treatment device for original tobacco stems after threshing includes a feeding equipment for elevation 3, a weighing equipment 4, a temperature and humidity increasing equipment 5, and a tobacco stem extrusion equipment 6. The feeding end of the feeding equipment for elevation 3 is connected to the discharging end of the tobacco stem vibrating screen conveyor 1 of the threshing unit through a first conveying mechanism. A downward-extending limiting tube 7 is provided at the discharging opening of the feeding equipment for elevation 3. An optoelectronic switch is arranged inside the limiting tube 7, which can detect whether there is material passing through the internal channel of the limiting tube 7 and serve as the basis for starting and stopping the feeding equipment for elevation 3 and adjusting its parameters. The weighing equipment 4 is an electronic belt scale, and the feeding end of the weighing equipment 4 is located below the limiting tube 7. The feeding end of the temperature and humidity increasing equipment 5 is connected to the discharging end of the weighing equipment 4, and the discharging end of the temperature and humidity increasing equipment 5 is connected to the feeding end of the tobacco stem extrusion equipment 6 through a second conveying mechanism. The discharging end of the tobacco stem extrusion equipment 6 is connected to the feeding end of the tobacco stem re-dryer 2 through a third conveying mechanism.

[0027] The temperature and humidity increasing equipment 5 adopts a tunnel-type temperature and humidity increasing equipment, and the temperature and moisture of the tobacco stems after threshing are increased through multi-channel steam injection in the cavity of the tunnel-type temperature and humidity increasing equipment, so that the moisture and temperature of the original tobacco stems meet the requirements.

[0028] The feeding equipment for elevation 3 includes a material conveying traveling crane, a feeding bin, and a feeding lifting belt. The material conveying traveling crane adopts a reciprocating cloth-feeding method to evenly spread the material on the feeding bin and lift the material through the feeding lifting belt.

[0029] Above the weighing device 4 near the discharge end, a moisture meter 8 is provided to detect the moisture of the original stem after threshing before entering the temperature and humidity increasing device 5. On the second conveying mechanism, a moisture and temperature meter 9 and a magnet 10 are provided. The moisture and temperature meter 9 is used to detect the moisture and temperature of the original stem after threshing after entering the temperature and humidity increasing device 5 for temperature and humidity increase, and the magnet 10 can adsorb metal substances in the original stem for removal to prevent damage to subsequent equipment during extrusion.

[0030] The first conveying mechanism includes a first belt conveyor 11 and a second belt conveyor 12 that are perpendicularly connected. The feeding end of the first belt conveyor 11 is connected to the discharge end of the tobacco stem vibrating screen conveyor 1 of the threshing unit, and the discharge end of the second belt conveyor 12 is connected to the feeding end of the lifting and feeding device 3.

[0031] The second conveying mechanism includes a distributing vibrating conveyor 14. Specifically, the second conveying mechanism includes a first vibrating conveyor 13 and a distributing vibrating conveyor 14 that are connected in sequence along the left - right direction. At the middle bottom wall of the vibrating trough of the distributing vibrating conveyor 14, a first discharge opening 15 that can be opened or closed is provided, and the end of the vibrating trough of the distributing vibrating conveyor 14 is an open end as the second discharge opening 16. The tobacco stem extrusion device 6 includes two tobacco stem extruders 17 arranged side by side. The feeding ends of the two tobacco stem extruders 17 are respectively connected to the two discharge openings of the distributing vibrating conveyor 14 through their respective feeding conveyors 18.

[0032] The conveying direction of the first belt conveyor 11 extends along the front - back direction, the conveying direction of the second belt conveyor 12 extends along the left - right direction and is located on the front side of the first belt conveyor 11. The lifting and feeding device 3, the weighing device 4, the temperature and humidity increasing device 5, and the second conveying mechanism are arranged in a row from left to right. The two tobacco stem extruders 17 are arranged side by side in the left - right direction, and the two tobacco stem extruders 17 are located behind the distributing vibrating conveyor 14 and in front of the tobacco stem re - dryer 2.

[0033] The third conveying mechanism includes a second vibrating conveyor 19, a third vibrating conveyor 20, a third belt conveyor 21, a fourth belt conveyor 22, and a fifth belt conveyor 23 that are connected in sequence. The second vibrating conveyor 19 is located below the discharge openings of the two tobacco stem extruders 17. The second vibrating conveyor 19, the third vibrating conveyor 20, and the third belt conveyor 21 are connected in sequence from right to left. The fourth belt conveyor 22 conveys from front to back, and the fifth belt conveyor 23 conveys from left to right. The feeding section of the tobacco stem re - dryer 2 is connected to the discharge end of the fifth belt conveyor 23.

[0034] The entire pre - treatment device for the original stem after threshing adopts this layout method, which is compact and can effectively save the occupied space.

[0035] The working process of the pre - treatment device for the original stem after threshing provided in this embodiment is as follows:

[0036] The original cut stems output by the vibrating screen conveyor 1 of the threshing unit are successively fed into the lifting and feeding device 3 through the first belt conveyor 11 and the second belt conveyor 12. The material conveying trolley of the lifting and feeding device 3 spreads the original cut stem material in a reciprocating feeding manner into the feeding bin. After the feeding bin accumulates a certain amount of original cut stem material, the original cut stem material is lifted by the feeding lifting belt according to the process flow set by the electronic belt scale, and then falls into the belt of the electronic belt scale through the limiting pipe 7. It is evenly and stably conveyed to the temperature and humidity increasing device 5 by the electronic belt scale. After being heated and humidified in the temperature and humidity increasing device 5, it is successively conveyed by the first vibrating conveyor 13. During this process, the possible metal substances are removed by the magnet 10, and then conveyed by the distributing vibrating conveyor 14. It respectively falls into the two lower feeding conveyors 18 through the two discharge openings provided by the distributing vibrating conveyor 14, and is respectively fed into the two cut stem extrusion devices 6 by the two feeding conveyors 18. The two cut stem extrusion devices 6 respectively perform extrusion treatment on the original cut stems. The original cut stems after extrusion treatment fall onto the second vibrating conveyor 19 below, and then are successively conveyed by the third vibrating conveyor 20, the third belt conveyor 21, the fourth belt conveyor 22 and the fifth belt conveyor 23 to the cut stem re-dryer 2 for re-drying, and finally form the finished cut stems.

[0037] Among them, the electron micrograph of the original cut stems after threshing output by the vibrating screen conveyor 1 of the threshing unit is shown in Figure 5 , and the electron micrograph of the finished cut stems after being pretreated by the pretreatment device for the original cut stems after threshing and then re-dried is shown in Figure 6 . It can be seen from the figure that the fiber tissue structure of the finished cut stems after being pretreated by the pretreatment device for the original cut stems after threshing has changed, which is beneficial to the rapid penetration of moisture in the subsequent processing, thus solving the problem of the moisture difference inside and outside the cut stems before cutting the stems.

[0038] The pretreatment device for the original cut stems after threshing provided in this embodiment, the settings of the lifting and feeding device 3, the photoelectric switches on the limiting pipe 7 and the electronic belt scale can balance the upstream and downstream processes and adjust the process flow and its stability; the temperature and humidity increasing device 5 enables the original cut stems to have the temperature and moisture required for extrusion, providing a prerequisite for the implementation of the extrusion process; the settings of the moisture meter 8 and the moisture and temperature meter 9 can monitor the moisture of the original cut stems before heating and humidifying, as well as the temperature and moisture of the original cut stems after heating and humidifying in real time; the cut stem extrusion device 6 changes the fiber tissue structure of the original cut stems after extrusion, so that the moisture in the cut stems can quickly penetrate inward in the subsequent processing, improving the moisture uniformity of the cut stem filaments, improving the effect of the filamentous cut stems, reducing the content of cut stem chips in the cut stems, and thus achieving the purpose of improving the stability of the cut stem quality and the internal quality.

[0039] The above is only the preferred embodiment of the present invention, and it is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for pre-processing tobacco stems after threshing, comprising a threshing unit tobacco stem vibrating and screening conveyor and a tobacco stem re-drying machine, characterized in that: A device for pretreating the original stems after threshing is arranged between the tobacco stem vibrating and screening conveyor of the threshing unit and the tobacco stem redrying machine. The device for pretreating the original stems after threshing comprises a lifting and feeding device, a weighing device, a heating and humidifying device, and a tobacco stem extrusion device. The feeding end of the lifting and feeding device is connected with the discharging end of the tobacco stem vibrating and screening conveyor of the threshing unit through a first conveying mechanism. A downwardly extending limiting tube is provided at the discharging port of the lifting and feeding device. The feeding end of the weighing device is located below the limiting tube. The feeding end of the heating and humidifying device is connected with the discharging end of the weighing device. The discharging end of the heating and humidifying device is connected with the feeding end of the tobacco stem extrusion device through a second conveying mechanism. The discharging end of the tobacco stem extrusion device is connected with the feeding end of the tobacco stem redrying machine through a third conveying mechanism.

2. The device for pre-treating the original stems after leaf threshing according to claim 1, characterized in that: The second conveying mechanism includes a material-dividing vibrating conveyor, a first drop-out opening is opened on the bottom wall of the middle section of the vibration trough of the material-dividing vibrating conveyor, and the end of the vibration trough of the material-dividing vibrating conveyor is open as a second drop-out opening; the tobacco stem extrusion equipment includes two tobacco stem extruders arranged side by side, and the feeding ends of the two tobacco stem extruders are connected to the two drop-out openings of the material-dividing vibrating conveyor through their respective feeding conveyors.

3. The device for pre-treating the original stems after leaf threshing according to claim 1, characterized in that: A moisture meter is provided above the weighing device near the discharging end, and a moisture temperature meter and a magnet are provided on the second conveying mechanism.

4. The device for pre-treating the original stems after leaf threshing according to claim 1, characterized in that: The weighing device is an electronic belt scale.

5. The device for pre-treating the original stems after leaf threshing according to claim 1, characterized in that: A photoelectric switch is arranged inside the limiting tube.

6. The device for pre-treating the original stems after leaf threshing according to claim 2, characterized in that: The first conveying mechanism includes a first belt conveyor and a second belt conveyor which are vertically connected to each other. The feed end of the first belt conveyor is connected to the discharge end of the tobacco stem vibrating and screening conveyor of the leaf beating unit, and the discharge end of the second belt conveyor is connected to the feed end of the lifting and feeding equipment.

7. The device for pre-treating the original stems after leaf threshing according to claim 6, characterized in that: The conveying direction of the first belt conveyor extends in the front-to-back direction, the conveying direction of the second belt conveyor extends in the left-to-right direction and is located in front of the first belt conveyor, the lifting and feeding equipment, weighing equipment, heating and humidification equipment, and the second conveying mechanism are arranged in a row from left to right, and the two tobacco stem extruders are arranged side by side in the left-to-right direction, and the two tobacco stem extruders are located behind the material dividing vibrating conveyor and in front of the tobacco stem redrying machine.

8. The device for pre-treating the original stems after leaf threshing as claimed in claim 7, characterized in that: The second conveying mechanism includes a first vibrating conveyor and a material-dividing vibrating conveyor which are connected in sequence along the left-right direction.

9. The device for pre-treating the original stems after leaf threshing according to claim 7, characterized in that: The third conveying mechanism includes a second vibrating conveyor, a third vibrating conveyor, a third belt conveyor, a fourth belt conveyor and a fifth belt conveyor which are connected in sequence. The second vibrating conveyor is located below the discharge ports of the two tobacco stem extruders. The second vibrating conveyor, the third vibrating conveyor and the third belt conveyor are connected in sequence from right to left. The fourth belt conveyor conveys from front to back, and the fifth belt conveyor conveys from left to right. The feeding section of the tobacco stem redrying machine is connected to the discharge end of the fifth belt conveyor.

10. The device for pre-treating the original stems after leaf threshing according to claim 1, characterized in that: The heating and humidifying equipment is a tunnel-type heating and humidifying equipment.

Images