A drum-type stem cutting and screening device

Abstract

The present invention provides a drum-type stem cutting and screening device, which includes a frame, a drum screen arranged in the frame, rolling rings mounted on both ends of the drum screen, and a driving device. The drum screen is tilted so that it is lower on the left and higher on the right. The drum screen includes a material leveling section, a screening section, and a material discharging section that are sequentially connected from right to left; the screening section includes a plurality of wedge-shaped bars arranged in parallel, and each of the wedge-shaped bars is equally spaced and distributed around the axis of the drum screen; the cross-section of the wedge-shaped bar is an isosceles triangle structure, and the tip of the wedge-shaped bar faces the axis of the drum screen; the bottoms of the two ends of the wedge-shaped bar are respectively connected to the rolling rings through screws, and the screws are provided with a top fixing nut and a bottom fixing nut; a material receiving device is provided below the screening section. The present invention can conveniently adjust the spacing between two adjacent wedge-shaped bars according to the shape of the stem and the screening specification requirements, and can better meet different process requirements.

Description

Technical Field

[0001] The invention belongs to the technical field of tobacco processing equipment, and in particular relates to a drum-type stem cutting and screening device. Background Art

[0002] Tobacco stems are one of the main raw materials for tobacco. The diameter of tobacco stems tends to decrease from the base to the tip of the leaf. From the appearance, they look like irregular hammers on the handle of a hammer. Since the stems have an adverse effect on product quality, they need to be removed in production. However, judging from the operation of the stem removal equipment, it is very difficult to fundamentally solve the problem of stems.

[0003] At present, domestic and foreign tobacco processing enterprises generally use vibrating conveyor screens to remove tobacco stems. The main principle is to use the principle of vibration to vibrate and convey tobacco stems containing tobacco stems on the vibrating screen while screening them. Normal tobacco stems fall through the vibrating screen to the lower layer of the screen plate, while the stems with large heads and small bodies are intercepted on the upper layer of the screen plate due to their large geometric shape compared to the tobacco stems. In this way, the stems and tobacco stems can be separated better. However, in this process, the stem parts of many tobacco stems are stuck in the screen holes, while their heads are on the top of the screen plate. Under the action of vibration, the binding force between the tobacco stems and the screen holes becomes stronger and stronger. As the production continues, more and more tobacco stems are blocked in the holes, which seriously affects the screening effect of the vibrating screen. In order to solve this problem, on the one hand, the length and width of the vibrating screen are increased, and on the other hand, the tobacco stems blocked in the screen holes are frequently cleaned manually during the production process. However, it is difficult for the equipment to clean the tobacco stems during the production process, because there are many tobacco stems on the upper layer at the same time, and it is easy to bring out the normal tobacco stems during the cleaning process.

[0004] After decades of development and improvement, various types of stalk screening machines have reached a high level in terms of structure, performance and reliability, and can basically meet the needs of process production. However, from the current requirements of threshing, re-baking and silk making processes for stalk screening machines, there are still common problems: the size of the screen holes of the stalk screening machine is fixed, which makes it only suitable for one specification of screening process requirements. Summary of the invention

[0005] The object of the present invention is to provide a drum-type stem cutting and screening device to solve the above-mentioned technical problems in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A drum-type stem cutting and screening device, which includes a frame, a drum screen arranged in the frame, rolling rings mounted on both ends of the drum screen, and a driving device for driving the rolling rings to rotate, wherein the drum screen is inclined with the left side lower and the right side higher, and the drum screen includes a material leveling section, a screening section, and a material discharging section which are sequentially connected from right to left; the screening section includes a plurality of wedge bars arranged in parallel, each of which is equally spaced and distributed around the axis of the drum screen; the cross-section of the wedge bar is an isosceles triangle structure, and the tip of the wedge bar faces the axis of the drum screen; the bottoms of the two ends of the wedge bar are respectively connected to the rolling rings through screws, and the screws are provided with a top fixing nut located on the inner side of the rolling ring and a bottom fixing nut located on the outer side of the rolling ring; a material receiving device is provided below the screening section.

[0008] Preferably, the material receiving device includes a receiving hopper, a first conveyor, and a second conveyor arranged in sequence from top to bottom, the inlet of the receiving hopper faces the screening section, the outlet of the receiving hopper faces the first conveyor, and the discharge port of the first conveyor faces the second conveyor.

[0009] Preferably, a third conveyor is provided below the outlet of the discharging section.

[0010] Preferably, the driving device includes a roller, a driving motor and a stop wheel arranged on a supporting frame inside the frame, the two sides of the rolling ring are respectively in contact with the rollers, and the driving motor drives the rollers to rotate; the stop wheel is in contact with the end face of the rolling ring away from the entrance of the drum screen.

[0011] Preferably, it also includes a stem head peeling device, which includes a cutter roller bearing seat, a cutter motor, a knife holder, and a cutter. The cutter roller bearing seat is arranged on a support frame inside the frame and is located below the screening section. The middle position of the knife holder is rotatably connected to the cutter roller bearing seat; the cutter motor is used to drive the knife holder to rotate; and the cutter is arranged at both ends of the knife holder.

[0012] Preferably, the cutting knife is detachably connected to the knife holder.

[0013] Preferably, a plurality of threaded holes are respectively provided at both ends of the tool holder, and the threaded holes are evenly distributed along the extension direction of the tool holder; and a plurality of through holes are provided on the cutter for the screw rod sections of the tool pressing bolts to pass through.

[0014] Preferably, it also includes a dust removal device arranged on the top of the frame, the dust removal device includes a dust removal fan and a dust collector, the air intake of the dust removal fan is located above the drum screen, and the air outlet of the dust removal fan is connected to the dust collector through a dust removal pipe.

[0015] Preferably, a plurality of guide plates are arranged on the inner wall of the material leveling section, and the guide plates are arranged obliquely with the left side lower and the right side higher, and the guide plates are evenly distributed on the circumference of the inner wall of the material leveling section.

[0016] Preferably, the inclination angle of the guide plate is 35 degrees to 45 degrees.

[0017] The beneficial effects of the present invention are:

[0018] The drum-type stem cutting and screening device of the present invention comprises a screening section including a plurality of wedge-shaped bars arranged in parallel, the cross section of the wedge-shaped bars being an isosceles triangle structure, and the wedge-shaped bars are equally spaced around the circumference of the drum screen. When the raw tobacco stems enter the screening section, tobacco stems with a diameter smaller than the gap between two connected wedge-shaped bars, i.e. qualified tobacco stems, naturally fall down and are transported to the subsequent production process via the dropping device; tobacco stems with a minimum diameter larger than the gap between two adjacent wedge-shaped bars, i.e. stems, are discharged via the discharging section as the drum screen rotates, thereby achieving the screening of tobacco stems and the removal of stems; at the same time, the wedge-shaped bars of the present invention can effectively lift and screen the tobacco stems; and the wedge-shaped bars are connected to the rolling ring via a screw rod, and a top fixing nut located on the inner side of the rolling ring and a bottom fixing nut located on the outer side of the rolling ring are provided on the screw rod, so that the screw rod can be moved close to or away from the axis of the drum screen by rotating the top fixing nut and the bottom fixing nut, thereby driving the wedge-shaped bars to move close to or away from the axis of the drum screen via the screw rod, and thereby adjusting the gap between two adjacent wedge-shaped bars. It can be seen that the drum-type stem cutting and screening device of the present invention can conveniently adjust the distance between two adjacent wedge-shaped bars according to the shape of the stems and the screening specification requirements, better realize the removal and screening of the stems in the tobacco stems, and can better meet different process requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments, and further describe the specific embodiments of the present invention in detail in conjunction with the drawings, wherein

[0020] Figure 1 A schematic diagram of a drum-type stem cutting and screening device provided in an embodiment of the present invention;

[0021] Figure 2 Another schematic diagram of a drum-type stem cutting and screening device provided in an embodiment of the present invention;

[0022] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0023] Figure 4 A schematic diagram of a cutter and a cutter holder provided in an embodiment of the present invention when connected.

[0024] Markings in the accompanying drawings:

[0025] 1. Frame 2. Feeding vibration trough 3. Material leveling section 4. Guide plate 5. Rolling ring

[0026] 6. Wedge bar 7. First roller 8. Drive motor 9. Stop wheel 10. Cutter roller bearing seat

[0027] 11. Cutter motor 12. Drop hopper 13. First belt conveyor 14. Second belt conveyor

[0028] 15. Second roller 16. Discharging section 17. Third belt conveyor 18. Dust removal fan

[0029] 19. Dust removal duct 20. Inspection door 21. Screw 22. Top fixing nut

[0030] 23. Bottom fixing nut 24. Knife holder 25. Cutter

[0031] 26. Pressing bolt 27. Threaded hole DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present invention, the solution will be further described in detail below in conjunction with specific embodiments.

[0033] like Figures 1 to 4 As shown, an embodiment of the present invention provides a drum-type stem cutting and screening device, which includes a frame 1, a drum screen arranged in the frame, rolling rings 5 ​​mounted on both ends of the drum screen, and a driving device for driving the rolling rings 5 ​​to rotate, wherein the drum screen is inclined with the left side lower and the right side higher, and the drum screen includes a material leveling section 3, a screening section, and a material discharge section 16 connected in sequence from right to left; the screening section includes a plurality of parallel wedge bars 6, each of which is evenly spaced and distributed around the axis of the drum screen; the cross-section of the wedge bar 6 is an isosceles triangle structure, and the tip of the wedge bar faces the axis of the drum screen; the bottoms of the two ends of the wedge bar are respectively connected to the rolling ring 5 through a screw 21, and the screw is provided with a top fixing nut 22 located on the inner side of the rolling ring and a bottom fixing nut 23 located on the outer side of the rolling ring; a material receiving device is provided below the screening section.

[0034] The drum-type stem cutting and screening device provided in the embodiment of the present invention has a screening section including a plurality of wedge-shaped bars arranged in parallel, the cross section of the wedge-shaped bars 6 being an isosceles triangle structure, and the wedge-shaped bars 6 are equally spaced around the circumference of the drum screen. When the raw tobacco stems enter the screening section, the tobacco stems with a diameter smaller than the gap between two adjacent wedge-shaped bars 6, i.e., qualified tobacco stems, fall naturally and are transported to the subsequent production process through the dropping device; the tobacco stems with a minimum diameter larger than the gap between two adjacent wedge-shaped bars 6, i.e., stems, are discharged through the discharging section as the drum screen rotates, and are then transported to the subsequent production process. The screening of tobacco stems and the removal of stem crooks are achieved; at the same time, the wedge-shaped bars of the present invention can effectively lift and screen tobacco stems; and the wedge-shaped bars are connected to the rolling ring through a screw, and the screw is provided with a top fixing nut located on the inner side of the rolling ring and a bottom fixing nut located on the outer side of the rolling ring, so that the screw can be moved closer to or away from the axis of the drum screen by rotating the top fixing nut 22 and the bottom fixing nut 23, thereby driving the wedge-shaped bars closer to or away from the axis of the drum screen through the screw, and further adjusting the gap between two adjacent wedge-shaped bars. It can be seen that the drum-type stem cutting and screening device of the present invention can conveniently adjust the spacing between two adjacent wedge-shaped bars according to the shape of the stem crooks and the screening specification requirements, better achieve the removal and screening of stem crooks in tobacco stems, and better meet different process requirements.

[0035] Furthermore, the receiving device includes a receiving hopper 12, a first conveyor 13, and a second conveyor 14, which are arranged in sequence from top to bottom. The inlet of the receiving hopper faces the screening section, the outlet of the receiving hopper faces the first conveyor, and the outlet of the first conveyor faces the second conveyor. With this solution, the tobacco stems from the screening section will be transported to the subsequent production process via the dropping hopper 12, the first belt conveyor 13, and the second belt conveyor 14.

[0036] Specifically, a third conveyor 17 is provided below the outlet of the discharging section, so that the third conveyor is used to convey the stems and wires falling from the outlet of the discharging section.

[0037] Further, the driving device includes a roller 7, a driving motor 8, and a stop wheel 9 arranged on a support frame in the frame, and the two sides of the roller are in contact with the rollers respectively, and the driving motor drives the rollers to rotate; the stop wheel is blocked with the end face of the roller away from the entrance of the drum screen. With this technical solution, the driving motor drives the roller, and the roller drives the roller 5, so that the drum screen rotates; at the same time, the stop wheel 9 can limit the roller 5 to prevent the roller from moving left and right. It can be understood that since the two rollers are respectively mounted on the two ends of the drum screen, the two rollers are supported by two rollers respectively, and the roller used to support the roller on the right side can be called the first roller 7, and the roller used to support the roller on the left side can be called the second roller 15; since the drum screen is inclined with the left side lower and the right side higher, due to the action of gravity, the roller fixed on the drum screen is not easy to move to the right, and the stop wheel 9 is blocked with the left end face of the roller 5, thereby better avoiding the roller from moving to the left.

[0038] like Figure 3 and Figure 4 As shown, in another embodiment provided by the present invention, the drum-type stem cutting and screening device also includes a stem head peeling device, and the stem head peeling device includes a cutter roller bearing seat 10, a cutter motor 11, a tool holder 24, and a cutter 25. The cutter roller bearing seat is arranged on a support frame in the frame and is located below the screening section. The middle position of the tool holder is rotatably connected to the cutter roller bearing seat; the cutter motor is used to drive the tool holder to rotate; and the cutters are arranged at both ends of the tool holder. By adopting this scheme, the part of the stem with a diameter smaller than the gap between two adjacent wedge-shaped strips 6 naturally droops under the action of gravity, and this part passes through the gap between two adjacent wedge-shaped strips 6. At this time, the high-speed rotating cutter 25 cuts it off, and the cut tobacco stems with a diameter smaller than the gap between two adjacent wedge-shaped strips are mixed with qualified tobacco stems and flow to the subsequent process, and the remaining part of the stem is conveyed out through the discharge area 16 and the third belt conveyor 17; at the same time, since the smaller diameter part of the stem is cut off to become stems, the utilization rate of the tobacco stems is effectively improved, the stem is prevented from blocking the gap between the two wedge-shaped strips, and the problem of stem blocking the sieve holes in the prior art is better avoided.

[0039] In order to facilitate the disassembly of the cutter and the cutter holder, the cutter and the cutter holder are detachably connected.

[0040] like Figure 4As shown, a plurality of threaded holes 27 are respectively provided at both ends of the tool holder, and each of the threaded holes is evenly distributed along the extension direction of the tool holder; the cutter is provided with a plurality of through holes for the screw rod section of the pressure blade bolt 26 to pass through. With this solution, by making the pressure blade bolt 26 cooperate with different threaded holes and through holes, the cutter can be moved away from or close to the bearing seat of the cutter roller, so that the relative installation position of the cutter and the tool holder can be adjusted according to the process requirements and after the gap between the adjacent two wedge strips is adjusted, and then the cutter can cut off the part of the stem that passes through the gap between the adjacent two wedge strips 6. It can be understood that the screw rod section of the pressure blade bolt passes through the through hole and cooperates with the threaded hole to realize the connection between the cutter and the tool holder.

[0041] Furthermore, the drum-type stem cutting and screening device also includes a dust removal device arranged on the top of the frame, the dust removal device includes a dust removal fan 18 and a dust collector, the air suction port of the dust removal fan is located above the drum screen, and the air outlet of the dust removal fan is connected to the dust collector through a dust removal pipe 19, so that the dust generated during the working process can be sucked by the dust removal fan 18 to the dust removal pipe 19, and then discharged into the dust collector. It can be seen that the dust generated during the production process can be sucked away by the dust removal device to ensure a clean environment.

[0042] Specifically, a plurality of guide plates 4 are arranged on the inner wall of the material-scrambling section, and the guide plates 4 are arranged in an inclined manner with the left side lower and the right side higher, and the guide plates 4 are evenly distributed on the circumference of the inner wall of the material-scrambling section, so that the guide plates can be used to scramble the material and bring up the material, which is conducive to making the material enter the screening section evenly. It can be understood that the raw tobacco stems are input from the feed vibration trough 2, enter the material-scrambling section 3, and are guided by the guide plates 4 to continue to move to the left.

[0043] Preferably, the guide plate 4 has an inclination angle of 35 to 45 degrees. It can be understood that the inclination angle is an inclination angle relative to the axis of the drum screen; the material-scraping section, the screening section, and the material-discharging section are coaxially arranged, and the axis of the drum screen is also the axis of the material-scraping section.

[0044] The drum-type stem cutting and screening device provided in the embodiment of the present invention divides the drum screen into three sections to ensure balanced and smooth material feeding, effective separation of stems, and each of the tobacco stems and stems going its own way, which is also more convenient for the connection of subsequent process production equipment; the drum screen is arranged at an angle, and its feed end is higher than the tail end, which is convenient for feeding and discharging; in order to fundamentally improve the production environment of the equipment, dust removal ducts or dust removal ports can be provided on both sides of the upper left and right sides of the frame, and the dust in the tobacco stems can be discharged to the dust collector by the dust removal fan during screening, so as to reduce labor intensity and save manpower; and it can achieve the purpose of continuous and efficient cutting of the stem heads and automatic screening, can meet the process requirements of leaf threshing and re-drying factories and cigarette silk making for stem removal, and has a simple structure and is easy to maintain and use.

[0045] The above are only preferred embodiments of the present invention. It should be pointed out that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. Moreover, after reading the contents of the present invention, relevant technical personnel in the field may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A drum-type stem cutting and screening device, characterized in that: It comprises a frame, a drum screen arranged in the frame, rolling rings sleeved at both ends of the drum screen, and a driving device for driving the rolling rings to rotate. The drum screen is arranged in an inclined manner with the left side lower and the right side higher. The drum screen comprises a material leveling section, a screening section, and a material discharging section which are sequentially connected from right to left; the screening section comprises a plurality of wedge-shaped bars arranged in parallel, each of which is equally spaced and distributed around the axis of the drum screen; the cross section of the wedge-shaped bar is an isosceles triangle structure, and the tip of the wedge-shaped bar faces the axis of the drum screen; the bottoms of both ends of the wedge-shaped bar are respectively connected to the rolling rings through screws, and the screws are provided with a top fixing nut located on the inner side of the rolling ring and a bottom fixing nut located on the outer side of the rolling ring; a material receiving device is provided below the screening section; The material receiving device comprises a receiving hopper, a first conveyor, and a second conveyor which are arranged in sequence from top to bottom, the inlet of the receiving hopper faces the screening section, the outlet of the receiving hopper faces the first conveyor, and the outlet of the first conveyor faces the second conveyor; A third conveyor is arranged below the outlet of the discharging section.

2. The drum-type stem cutting and screening device according to claim 1 is characterized in that: The driving device includes a roller, a driving motor, and a blocking wheel arranged on a supporting frame in the frame. The two sides of the rolling ring are respectively in contact with the rollers, and the driving motor drives the rollers to rotate; the blocking wheel is in contact with the end face of the rolling ring away from the entrance of the drum screen.

3. The drum-type stem cutting and screening device according to claim 1 is characterized in that: It also includes a stem head peeling device, which includes a cutter roller bearing seat, a cutter motor, a knife holder, and a cutter. The cutter roller bearing seat is arranged on a support frame inside the frame and is located below the screening section. The middle position of the knife holder is rotatably connected to the cutter roller bearing seat; the cutter motor is used to drive the knife holder to rotate; and the cutters are arranged at both ends of the knife holder.

4. The drum-type stem cutting and screening device according to claim 3 is characterized in that: The cutting knife is detachably connected to the knife holder.

5. The drum-type stem cutting and screening device according to claim 4 is characterized in that: A plurality of threaded holes are respectively arranged at both ends of the tool holder, and the threaded holes are evenly distributed along the extension direction of the tool holder; and a plurality of through holes are arranged on the cutter for the screw rod sections of the tool pressing bolts to pass through.

6. The drum-type stem cutting and screening device according to claim 1, characterized in that: It also includes a dust removal device arranged on the top of the frame, the dust removal device includes a dust removal fan and a dust collector, the air intake of the dust removal fan is located above the drum screen, and the air outlet of the dust removal fan is connected to the dust collector through a dust removal pipeline.

7. The drum-type stem cutting and screening device according to any one of claims 1 to 6, characterized in that: A plurality of guide plates are arranged on the inner wall of the material leveling section. The guide plates are arranged in an inclined manner with the left side lower and the right side higher. The guide plates are evenly distributed on the circumference of the inner wall of the material leveling section.

8. The drum-type stem cutting and screening device according to claim 7, characterized in that: The inclination angle of the guide plate is 35 degrees to 45 degrees.

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