Screening cylinder and device for removing broken stems

Abstract

The utility model belongs to the technical field of tobacco raw material processing equipment, and discloses a stem crutch and broken stem removing and screening cylinder which comprises a cylinder body and a shoveling plate assembly, the cylinder body is obliquely arranged relative to the horizontal plane, the higher horizontal end of the cylinder body is arranged as a feeding end, and a first screening assembly is arranged on the inner side wall of the cylinder body. The first screening assembly is provided with a plurality of first strip-shaped screening holes. The shoveling plate assembly is arranged on the inner side wall of the cylinder and comprises a plurality of axial shoveling plates parallel to the length direction of the first strip-shaped screen holes and a plurality of inclined shoveling plates inclined to the length direction of the first strip-shaped screen holes, and the inclined shoveling plates and the axial shoveling plates are arranged at intervals. The utility model further discloses a stem crutch and broken stem removing and screening device with the screening barrel, the contact time of tobacco stem raw materials and the screening barrel can be prolonged, the tobacco stems can be effectively guided to be screened out of the screening barrel, and the screening effect of the tobacco stem raw materials is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tobacco raw material processing equipment, in particular to a stem and broken stem removal screening cylinder and a device. Background Art

[0002] Tobacco stems are an important raw material for cigarettes, and usually the weight of tobacco stems accounts for about 25% of the weight of tobacco leaves. In the entire process of making tobacco stem shreds, the raw tobacco stems must first be screened to remove broken stems from the tobacco stems. At the same time, the stems in the tobacco stem raw materials need to be removed as much as possible to improve the quality of subsequent stem shreds processing.

[0003] At present, commonly used equipment includes a rotary stem and broken stem removal device, which separates broken stems, tobacco stems and stems through the rolling of the screen drum, and then removes the broken stems and stems from the tobacco stems. However, traditional equipment only completes the screening of tobacco stem raw materials through the screen drum structure and the rolling action of the screen drum. In traditional operations, the time for the tobacco stem raw materials to flow through the screen drum is too short, which means that the contact time between the tobacco stem raw materials and the screening grid in the screen drum is not sufficient, resulting in insufficient amount of broken stems removed and serious leakage. The screening effect of the entire equipment is not ideal, which has a great impact on the subsequent processing quality of stem shreds. Utility Model Content

[0004] The utility model aims to provide a screening cylinder and device for removing tobacco stems and broken stems, which can increase the contact time between tobacco stem raw materials and the screening cylinder, and can also effectively guide the tobacco stems to be screened out of the screening cylinder, thereby improving the screening effect of the tobacco stem raw materials.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] Provided is a stem-breaking and stem-removing screening cylinder, comprising:

[0007] A cylinder, wherein the central axis of the cylinder is inclined relative to a horizontal plane, an end of the cylinder with a higher horizontal height is set as a feeding end, a first screening component is provided on the inner side wall of the cylinder, and a plurality of first strip-shaped screen holes are provided on the first screening component, and the length of the first strip-shaped screen holes extends along the central axis direction of the cylinder;

[0008] A copying plate assembly is arranged on the inner side wall of the cylinder, and the copying plate assembly includes a plurality of axial copying plates arranged parallel to the length direction of the first strip sieve holes, and a plurality of inclined copying plates arranged at an angle to the length direction of the first strip sieve holes, and the plurality of inclined copying plates and the axial copying plates are arranged at intervals.

[0009] In one embodiment, the inclined lifting plate is adjacent to the feed end of the cylinder, and the axial projection length of the inclined lifting plate along the cylinder accounts for 1 / 5 to 2 / 5 of the axial projection length of the cylinder.

[0010] In one embodiment, the axial copying plate includes a supporting portion, and an extension portion is connected to one end of the supporting portion close to the center of the cylinder along the radial direction of the cylinder, and the extension portion is adjacent to the feed end of the cylinder. The axial projection length of the extension portion along the cylinder accounts for 2 / 5 to 1 / 2 of the axial projection length of the cylinder.

[0011] In one embodiment, the first screening assembly includes a plurality of axial screening rods arranged parallel to the axial direction of the cylinder, and the first strip-shaped screening hole is formed between two adjacent axial screening rods.

[0012] In one of the embodiments, a second screening assembly is further provided on the inner side wall of the cylinder, the second screening assembly is arranged on the side of the cylinder away from the feed end, and the second screening assembly is provided with second strip sieve holes which are arranged perpendicular to the length direction of the first strip sieve holes.

[0013] In one of the embodiments, it further comprises a plurality of radial lifting plates, the lifting plate assembly further comprises a plurality of radial lifting plates, the radial lifting plates are arranged on the second screening assembly, and the radial lifting plates are arranged at an angle of 0 to 20° relative to the length direction of the second strip sieve hole.

[0014] In one embodiment, the radial copying plates are spaced apart from the axial copying plates, the radial copying plates between two adjacent axial copying plates are set as a unit, at least two groups of radial copying plates in one unit are provided, and the radial copying plates of two adjacent groups are spaced apart and staggered along the central axis direction of the cylinder.

[0015] In one of the embodiments, the lifting plate assembly further comprises a retention plate, and the retention plate is arranged on the axial lifting plate and / or the inclined lifting plate.

[0016] In one of the embodiments, the lifting plate assembly further includes a buffer lifting plate, and the buffer lifting plate is disposed at one end of the feeding end, and the buffer lifting plate is disposed at an angle of 5° to 20° with respect to the radial direction of the cylinder.

[0017] A device for removing and screening stalks and broken stems is also provided, comprising the above-mentioned stalk and broken stem removal and screening cylinder, and further comprising:

[0018] An outer cover assembly, the outer cover assembly includes a cover body arranged outside the cylinder, the cover body is provided with a broken stem drop hopper, a tobacco stem drop hopper and a stem tip drop hopper in sequence along the feeding end;

[0019] A support assembly, wherein the outer cover assembly is arranged on the support assembly;

[0020] A driving assembly is connected to the screening drum in a driving manner to drive the screening drum to rotate.

[0021] Beneficial effects of the utility model:

[0022] The utility model discloses a stem and broken stem removal screening cylinder and device, which arranges a plurality of first strip-shaped sieve holes in the cylinder body for screening tobacco stem raw materials, and arranges a plurality of axial copying plates in the cylinder body which are parallel to the length direction of the first strip-shaped sieve holes, so that when tobacco stems in the tobacco stem raw materials rotate with the cylinder body to the axial copying plates, the axial copying plates act to make the tobacco stems parallel to the first strip-shaped sieve holes, so that normal tobacco stems can be screened out through the first strip-shaped sieve holes, which is beneficial to improving the screening effect of tobacco stems.

[0023] Furthermore, a plurality of inclined scissor plates are arranged obliquely in the length direction of the first strip sieve hole, and the plurality of inclined scissor plates are arranged at intervals from the axial scissor plates. Thus, through the cooperation between the inclined scissor plates and the axial scissor plates, the tobacco stems are pre-adjusted in position under the action of the inclined scissor plates, so that when these tobacco stems leave the inclined scissor plates and reach the axial scissor plates, they are more easily adjusted to be parallel to the first strip sieve hole under the action of the axial scissor plates, so that they can quickly pass through the first strip sieve hole to complete screening, thereby improving the effect of tobacco stem screening.

[0024] Furthermore, when the tobacco stem raw material flows from the feed end of the cylinder from a high place to the other end of the cylinder, it is blocked by the axial lifting plate and the inclined lifting plate, and the tobacco stem raw material bypasses from the top and bottom of the lifting plate assembly, and successively rolls and slides over the inner surface of the cylinder rotating along the axial direction, which effectively increases the contact time between the tobacco stem raw material and the first screening assembly, and can also effectively improve the screening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the cylinder (front end side) in the embodiment of the utility model;

[0026] Figure 2 It is a partial structural schematic diagram of the front end of the cylinder in the embodiment of the utility model;

[0027] Figure 3 It is a structural schematic diagram of the cylinder (rear end side) in the embodiment of the utility model;

[0028] Figure 4 It is a plan view of the rear end of the cylinder in the embodiment of the utility model;

[0029] Figure 5 It is a partial structural schematic diagram of the axial copying plate in the embodiment of the utility model;

[0030] Figure 6This is a schematic diagram of the planar layout structure of a radial copy plate in an embodiment of the utility model;

[0031] Figure 7 This is another schematic diagram of the planar layout structure of the radial copying plate in the embodiment of the utility model;

[0032] Figure 8 It is another schematic diagram of the planar arrangement structure of the radial copying plate in the embodiment of the utility model;

[0033] Fig. 9 It is a schematic diagram of the structure of the device for removing and screening the broken stems in the embodiment of the utility model;

[0034] Fig.10 It is a side structural schematic diagram of the stem-breaking and stem-removing and screening device in an embodiment of the utility model.

[0035] In the figure:

[0036] 100, cylinder; 110, feed end; 120, axial screening rod; 130, radial screening rod; 131, second strip sieve hole; 140, outer screen; 150, rear end; 200, copying plate assembly; 210, axial copying plate; 211, support portion; 212, extension portion; 220, inclined copying plate; 230, radial copying plate; 240, retention plate; 250, buffer copying plate; 300, cover; 310, broken stem drop hopper; 320, tobacco stem drop hopper; 330, stem turn drop hopper; 410, first support frame; 420, second support frame; 510, drive motor; 520, drive wheel; 530, support roller. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] like Figures 1 to 5 As shown, a stem-breaking and stem-removing screening cylinder of the present embodiment comprises a cylinder body 100 and a lifting plate assembly 200, wherein the central axis of the cylinder body 100 is arranged obliquely relative to the horizontal plane, the end of the cylinder body 100 with a higher horizontal height is set as a feed end 110, a first screening assembly is arranged on the inner side wall of the cylinder body 100, and a plurality of first strip-shaped sieve holes are arranged on the first screening assembly, and the length of the first strip-shaped sieve holes extends along the central axis direction of the cylinder body 100; the lifting plate assembly 200 is arranged on the inner side wall of the cylinder body 100, and the lifting plate assembly 200 comprises a plurality of axial lifting plates 210 arranged parallel to the length direction of the first strip-shaped sieve holes, and a plurality of inclined lifting plates 220 arranged at an angle to the length direction of the first strip-shaped sieve holes, and the plurality of inclined lifting plates 220 and the axial lifting plates 210 are arranged at intervals from each other.

[0042] In the utility model, the tobacco stem raw materials include broken stems, tobacco stems and stem ends, wherein the broken stems are in granular or small block shape, the tobacco stems are normal tobacco stems, in the form of slender strips of varying lengths, and the stem ends are the connecting parts between the tobacco stems and the tobacco rods on the tobacco leaves, and the diameter thereof gradually changes along the length direction, presenting a shape of a large head and a small body.

[0043] In this embodiment, the feed end 110 of the cylinder 100 is the front end, and the other end of the cylinder 100 is the rear end 150. The tobacco stem raw material enters the cylinder 100 from the feed end 110, and the tobacco stem raw material flows from the high front end to the low rear end 150 under the action of gravity. A plurality of first strip-shaped sieve holes are provided in the cylinder 100 for screening the tobacco stem raw material, and a plurality of axial scissor plates 210 are provided in the cylinder 100 that are parallel to the length direction of the first strip-shaped sieve holes, so that when the tobacco stems in the tobacco stem raw material rotate with the cylinder 100 to the axial scissor plates 210, the tobacco stems are parallel to the first strip-shaped sieve holes through the action of the axial scissor plates 210, so that normal tobacco stems can be screened out through the first strip-shaped sieve holes, which is beneficial to improving the screening effect of tobacco stems.

[0044] Furthermore, a plurality of inclined scissor plates 220 are arranged obliquely in the length direction of the first strip sieve hole, and the plurality of inclined scissor plates 220 are arranged at intervals from the axial scissor plates 210. Thus, through the cooperation between the inclined scissor plates 220 and the axial scissor plates 210, the tobacco stems are pre-adjusted in position under the action of the inclined scissor plates 220, so that when these tobacco stems leave the inclined scissor plates 220 and reach the axial scissor plates 210, they are more easily adjusted to be parallel to the first strip sieve hole under the action of the axial scissor plates 210, so that they can quickly pass through the first strip sieve hole to complete screening, thereby improving the effect of tobacco stem screening.

[0045] Furthermore, when the tobacco stem raw material flows from the feed end 110 of the cylinder 100 from a high place to the other end of the cylinder 100, the tobacco stem raw material is blocked by the axial lifting plate 210 and the inclined lifting plate 220, and bypasses from above and below the lifting plate assembly 200, and successively rolls and slides over the inner surface of the cylinder 100 rotating along the axial direction, which effectively increases the contact time between the tobacco stem raw material and the first screening assembly, and can also effectively improve the screening effect.

[0046] In actual operation, the angle between the central axis of the cylinder 100 and the horizontal plane is set to 3°. At this inclination angle, it can effectively ensure that the tobacco stem raw material can flow from the feed end 110 of the cylinder 100 to the rear end 150 of the cylinder 100 by its own weight, and will not make the flow speed of the tobacco stem raw material too fast, so that the cylinder 100 can fully screen the tobacco stem raw material. Of course, in other actual operations, other inclination angle settings can also be used, and such designs all belong to the protection scope of the present utility model. In particular, the commonly used inclination angle range is between 2.5° and 5°, such as 2.5°, 3°, 4° or 5°, which can effectively ensure the smooth flow of the tobacco stem raw material and the flow speed of the tobacco stem raw material, avoiding insufficient screening due to too fast flow, and avoiding low operation efficiency due to too slow flow. In addition, outside of this embodiment, other inclination angle settings may also be used, which may be less than 2.5° or greater than 5°, such as 2°, 6°, 8° or 10°, etc., and are not limited to the scope of the above embodiments. Such a design also falls within the protection scope of the present utility model.

[0047] In one embodiment, the inclined shoveling plate 220 is adjacent to the feed end 110 of the cylinder 100. After the tobacco stem raw material enters the cylinder 100 from the feed end 110, the inclined shoveling plate 220 can quickly pre-adjust the direction and position of the irregularly oriented tobacco stems, so that the subsequent axial shoveling plate 210 can adjust the tobacco stems to be parallel to the length direction of the first strip sieve hole, thereby improving the tobacco stem screening effect. Specifically, the axial projection length of the inclined shoveling plate 220 along the cylinder 100 accounts for 1 / 5 to 2 / 5 of the axial projection length of the cylinder 100, that is, in actual operation, the length of the inclined shoveling plate 220 arranged within the straight range of the cylinder 100 is approximately 1 / 5 to 2 / 5 of the length of the cylinder 100.

[0048] In actual operation, the inclined lifting plate 220 is set at the front 1 / 5 position on the side of the feeding end 110 of the cylinder 100, so that the inclined lifting plate 220 has sufficient length to pre-adjust the direction and position of the tobacco stems in the tobacco stem raw material entering the cylinder 100, thereby improving the screening effect. At the same time, it can also effectively avoid the inclined lifting plate 220 being too long, resulting in a long screening operation time, which affects the overall efficiency of the screening operation.

[0049] In other actual operations, the length of the inclined copying plate 220 can be set according to the actual working conditions, such as setting the length of the inclined copying plate 220 to 1 / 5, 3 / 10 or 2 / 5 of the length of the cylinder 100. Of course, it is not limited to the above-mentioned values ​​in this embodiment. The length of the inclined copying plate 220 is set to 1 / 10, 1 / 2 or 3 / 5 of the length of the cylinder 100. As long as the inclined copying plate 220 has enough length to ensure the pre-adjustment of the direction and position of the tobacco stems in the tobacco stem raw material, such designs belong to the protection scope of the present utility model.

[0050] In actual operation, the inclined angle of the inclined pick-up plate 220 relative to the first strip-shaped sieve hole is set to 45°, so as to achieve a good pre-adjustment effect on the tobacco stems in all directions, so that the subsequent axial pick-up plate 210 can smoothly adjust the tobacco stems to be parallel to the length direction of the first strip-shaped sieve hole. Of course, in other embodiments and applications, the inclined pick-up plate 220 can also be set to other inclination angles such as 30°, 35°, 40°, 50°, 55° or 60°, etc., as long as it can achieve a certain pre-adjustment effect on the direction and position of the tobacco stems, such designs all belong to the protection scope of the present utility model.

[0051] In one embodiment, the axial lift plate 210 includes a support portion 211, and an extension portion 212 is provided on one side of the support portion 211 close to the feed end 110. The axial projection length of the extension portion 212 along the cylinder 100 accounts for 2 / 5 to 1 / 2 of the axial projection length of the cylinder 100, that is, in actual operation, the setting length of the extension portion 212 is approximately 2 / 5 to 1 / 2 of the length of the cylinder 100.

[0052] In this embodiment, after the tobacco stem raw material just enters the cylinder 100 from the feed end 110, the extension 212 increases the time the tobacco stem raw material stays at the front end, so that the inclined shoveling plate 220 increases the pre-adjustment time of the tobacco stem direction and position. At the same time, by providing the inclined shoveling plate 220 of sufficient length and the axial shoveling plate 210 with the extension 212 at the feed end 110, the tobacco stems can be fully screened at the front of the cylinder 100 after flowing into the cylinder 100, and the tobacco stems flowing into the middle and rear of the cylinder 100 can also be preliminarily adjusted in direction and position, so that the tobacco stems flowing into the middle and rear of the cylinder 100 can be easily adjusted to be parallel to the length direction of the first strip sieve hole under the action of the axial shoveling plate 210, and the tobacco stems are screened out, which is conducive to improving the effect of tobacco stem screening.

[0053] In addition, in actual operation, the axial copy plate 210 is fixed inside the cylinder 100 by welding. Specifically, the operator drills into the cylinder 100 to complete the welding operation. The length of the extension 212 is set to be about 2 / 5 to 1 / 2 of the length of the cylinder 100. Preferably, the length of the extension 212 can be set to be about 2 / 5 or 1 / 2 of the length of the cylinder 100, which is convenient for the welding processing and subsequent maintenance of the operator, and avoids the extension 212 being too long to affect the operator's activity space inside the cylinder 100, resulting in some positions being difficult to process or maintain. Of course, in other actual operations, the length of the extension 212 can be set according to the actual operation situation, and is not limited to the above-mentioned values ​​of this embodiment. The length of the extension 212 can also be set to be about 1 / 5 or 3 / 5 of the length of the cylinder 100. As long as it can ensure that the extension 212 has enough length to ensure the adjustment of the direction and position of the tobacco stems in the tobacco stem raw material, such designs belong to the protection scope of the utility model.

[0054] In one embodiment, the first screening component includes a plurality of axial screening rods 120 arranged parallel to the axial direction of the cylinder 100, and a first strip-shaped screen hole is formed between two adjacent axial screening rods 120. That is, in this embodiment, the length direction of the first strip-shaped screen hole is parallel to the axial direction of the cylinder 100, so that the axial copying plate 210 is arranged to be parallel to the axial direction of the cylinder 100. During the rotation of the cylinder 100, the rotation of the cylinder 100 drives the movement inertia of the tobacco stem raw material to rotate, and the axial copying plate 210 parallel to the axial direction of the cylinder 100 is more likely to block the tobacco stems, so that the tobacco stems are more likely to fit on the axial copying plate 210 and be parallel to the plate surface of the axial copying plate 210, so that the tobacco stems are parallel to the length direction of the first strip-shaped screen hole and can be smoothly screened out from the first strip-shaped screen hole, thereby improving the effect of screening out the tobacco stems.

[0055] In one embodiment, a second screening component is further provided on the inner side wall of the cylinder 100, and the second screening component is arranged on the side of the cylinder 100 away from the feed end 110, and the second screening component is provided with second strip-shaped screen holes 131 arranged perpendicularly to the length direction of the first strip-shaped screen holes. Specifically, the second screening component includes a plurality of radial screening rods 130 perpendicular to the axial direction of the cylinder 100, and the second strip-shaped screen holes 131 are formed between two adjacent radial screening rods 130.

[0056] In this embodiment, after screening in the front and middle sections of the cylinder 100, part of the tobacco stems may not be successfully screened out because their direction and position remain perpendicular or nearly perpendicular to the length direction of the first strip sieve holes. After being adjusted by the front axial lifting plate 210, they still remain perpendicular or nearly perpendicular to the length direction of the first strip sieve holes, resulting in failure to be screened out. At this time, by providing a second strip sieve hole 131 perpendicular to the first strip sieve hole at the rear end 150 of the cylinder 100, the screening of this part of the tobacco stems is facilitated, further avoiding the occurrence of missed screening.

[0057] In practical applications, the axial screening rod 120 and the radial screening rod 130 are both set as small round steel structures, which have the advantages of simple and stable structure, low cost, and convenient processing. A number of small round steels are arranged side by side, wherein a first strip sieve hole or a second strip sieve hole 131 is formed between two adjacent small round steels. Of course, in other applications, round rod structures or square rod structures of other materials can also be used, as long as the first strip sieve hole and the second strip sieve hole 131 are formed between two adjacent axial screening rods 120 and two adjacent radial screening rods 130, respectively, such designs all belong to the protection scope of the present utility model.

[0058] In one embodiment, the pick-up plate assembly 200 further includes a plurality of radial pick-up plates 230, which are disposed on the second screening assembly and are disposed at an angle of 0 to 20° relative to the length direction of the second strip-shaped screen hole 131. Through the plurality of radial pick-up plates 230, the direction and position of the tobacco stems not screened out in the previous stage are further adjusted to be parallel to the length direction of the second strip-shaped screen hole 131 as much as possible, which is conducive to ensuring sufficient screening of the tobacco stems.

[0059] Specifically, by using a radial shoveling plate 230 that is perpendicular to or forms a large angle with the axial shoveling plate 210 at the rear section of the cylinder 100, the tobacco stem raw materials flowing in from the front middle section of the cylinder 100 are subjected to a large impact, that is, directly impacting the plate surface of the radial shoveling plate 230, and the radial shoveling plate 230 has the effect of stir-frying the tobacco stem raw materials. Thus, it is possible to break up the tobacco stem raw material clumps appearing in the front middle section, or impact the tobacco stem raw materials that have always maintained a certain direction and position in the front middle section to change their direction. Finally, through the guidance of the radial shoveling plate 230, the tobacco stems that have not been screened out in the front middle section can be smoothly screened through the second strip sieve holes 131, thereby improving the effect of tobacco stem screening.

[0060] In one embodiment, if Figure 6As shown, the radial scooping plates 230 and the axial scooping plates 210 are arranged at intervals, and the radial scooping plates 230 between two adjacent axial scooping plates 210 are set as a unit. There are at least two groups of radial scooping plates 230 in one unit, and the two adjacent groups of radial scooping plates 230 are arranged at intervals and staggered along the central axis direction of the cylinder 100. The radial scooping plates 230 and the axial scooping plates 210 mutually form impacts in two different directions on the tobacco stem raw materials, and the rotation of the cylinder 100 increases the movement amplitude of the tobacco stems. Finally, the tobacco stems flow along the axial direction of the cylinder 100 to the rear end 150 of the cylinder 100 under the action of gravity, and pass through the two groups of radial scooping plates 230 arranged at intervals and staggered, and are screened out from the second strip-shaped sieve holes 131 between the radial scooping plates 230 as much as possible, thereby improving the screening effect of the tobacco stems.

[0061] Furthermore, if Figure 7 As shown, a group of radial lifting plates 230 in one unit is arranged at an angle along the axial feeding direction of the cylinder 100 on one side close to the adjacent group of radial lifting plates 230. The inclined arrangement of the radial lifting plates 230 enables the tobacco stems on one group of radial lifting plates 230 in one unit to flow smoothly onto the corresponding lifting plates of another group. In particular, Figure 8 As shown, in some embodiments, there are three groups of radial shoveling plates 230 in one unit, and the two sides of the radial shoveling plates 230 in the middle group are respectively inclined along the axial direction of the cylinder 100 to facilitate the flow of tobacco stems. Of course, in other embodiments, the number of radial shoveling plates 230 in one unit can be set according to actual conditions, not limited to the two and three groups described in this embodiment, and only one group or more than three groups can be set. As long as the radial shoveling plates 230 can further assist in screening the tobacco stem raw materials to improve the tobacco stem screening effect, such designs belong to the protection scope of the present utility model.

[0062] In practical applications, the inclination angle of the radial lifting plate 230 is generally set to be 5° with the length direction of the second strip sieve hole 131, so that under the action of the radial lifting plate 230, the tobacco stems are as parallel to the second strip sieve holes 131 as possible, and are screened out from the second strip sieve holes 131, and the smoothness of the flow of the tobacco stem raw material can be guaranteed as much as possible.

[0063] In one embodiment, the pick-up plate assembly 200 further includes a retention plate 240, which is arranged on the axial pick-up plate 210 and / or the inclined pick-up plate 220. Specifically, in this embodiment, the retention plate 240 is arranged at the extension 212 of the axial pick-up plate 210 and the end of the inclined pick-up plate 220, and the retention plate 240, the axial pick-up plate 210 and the inclined pick-up plate 220 respectively form a structure with an inverted L-shaped or hook-shaped cross section. By setting the retention plate 240, when the tobacco stem raw material slides to the end on the extension 212 of the axial pick-up plate 210 and the inclined pick-up plate 220, the retention plate 240 plays a certain blocking role on the tobacco stem raw material, so that the tobacco stem raw material stays in the cylinder 100 for a longer time, further ensuring the adequacy of the tobacco stem raw material screening, thereby further improving the overall screening effect.

[0064] In one embodiment, the pick-up plate assembly 200 further includes a buffer pick-up plate 250, which is arranged at one end of the feed end 110, and the buffer pick-up plate 250 is inclined at an angle of 5° to 20° with the radial direction of the cylinder 100. After the tobacco stem raw material enters the cylinder 100 from the feed end 110, the tobacco stem raw material is first blocked and buffered by the buffer pick-up plate 250, so as to reduce the initial speed of the tobacco stem raw material, so that the flow speed of the tobacco stem raw material in the cylinder 100 is reduced, and the tobacco stem raw material is ensured to have sufficient contact time with the cylinder 100, so as to ensure the screening effect. In addition, through the inclined setting of the buffer pick-up plate 250, the tobacco stem raw material flows slowly and smoothly into the screening area coordinated by the inclined pick-up plate 220 and the axial pick-up plate 210 under the action of the buffer pick-up plate 250, which plays a certain guiding role.

[0065] In actual operation, when the tobacco stem raw material enters the cylinder 100 from the feed end 110 by means of a conveyor belt or direct dumping, the feed speed may be too fast, causing part of the tobacco stems to directly enter the middle and rear sections of the cylinder 100 without being screened by the coordinated adjustment of the inclined lifting plate 220 and the axial lifting plate 210, resulting in insufficient screening of the tobacco stem raw material. By providing a buffer lifting plate 250, it is helpful to slow down the initial feed speed of the tobacco stem raw material and ensure that the tobacco stem raw material has sufficient contact time with the cylinder 100, thereby avoiding the above-mentioned problem of insufficient screening and improving the screening effect.

[0066] like Figures 8 to 9As shown, a device for removing and screening tobacco stems and broken stems is also provided, including the above-mentioned tobacco stem and broken stem removal and screening cylinder, and also including an outer cover assembly, the outer cover assembly including a cover body 300 arranged on the outside of the cylinder body 100, so as to protect the cylinder body 100. In addition, the cover body 300 is provided with a broken stem drop hopper 310, a tobacco stem drop hopper 320 and a stem drop hopper 330 in sequence along the material end of the cylinder body 100, which are respectively used to realize the discharge of broken stems, tobacco stems and stems in sequence. In addition, an outer layer screen 140 is also provided on the outer side wall of the cylinder body 100, and the outer layer screen 140 is set as a waist-shaped mesh plate to realize the separation of broken stems and tobacco stems.

[0067] Specifically, after the tobacco stem raw material enters the cylinder 100 from the feed end 110, the broken stems and normal strip-shaped tobacco stems can smoothly pass through the screening of the first strip-shaped sieve hole or the second strip-shaped sieve hole 131 of the inner layer of the cylinder 100, and enter the outer screen 140 of the outer layer of the cylinder 100, and then the broken stems and tobacco stems are screened by the screening of the outer screen 140, and the broken stems pass through the outer screen 140, and are screened into the broken stem drop hopper 310, completing the screening and dropping of the broken stems. Normal tobacco stems cannot pass through the outer screen 140, and slide along the surface of the outer screen 140 into the tobacco stem drop hopper 320, completing the screening and dropping of the tobacco stems. The stems and large pieces of matter that cannot be screened out by the first strip sieve holes and the second strip sieve holes 131 directly slide in the cylinder 100 to the rear end 150 of the cylinder 100, and fall into the stem drop hopper 330, completing the screening and dropping of the stems, thereby ultimately achieving the separate screening of broken stems, tobacco stems and stems, with a good screening effect.

[0068] It also includes a support assembly, and an outer cover assembly is arranged on the support assembly. Specifically, the support assembly includes a first support frame 410 and a second support frame 420. Both sides of the outer cover assembly are respectively arranged on the first support frame 410 and the second support frame 420. The side of the barrel 100 where the feed end 110 is provided is arranged on the side close to the first support frame 410. The horizontal support height of the first support frame 410 is higher than that of the second support frame 420, so that the height of the side of the barrel 100 where the feed end 110 is provided is higher than that of the other side, so that the tobacco stem raw material can flow from the front end of the barrel 100 to the rear end 150 of the barrel 100 under the action of gravity.

[0069] The invention also includes a driving assembly, which is connected to the screening drum to drive the drum 100 to rotate. Specifically, the driving mechanism includes a driving motor 510, a driving wheel 520 and a supporting roller 530, which are respectively arranged at the front end and the rear end 150 of the drum 100 and are connected to the drum 100 in a driving manner, and the driving motor 510 is arranged on the first supporting frame 410 and is connected to the driving wheel 520 in a driving manner, so that the driving motor 510 drives the driving wheel 520 to rotate, so that the driving wheel 520 drives the drum 100 to rotate. Of course, in actual operation, different driving structures and methods can be adopted according to actual operation conditions and requirements, such as adopting gears, pulleys and other structures to realize transmission, or adopting a structure that uses vibration to drive the drum 100 to rotate, etc. As long as the driving drum 100 can be driven to rotate, such designs all belong to the protection scope of the present utility model.

[0070] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A stem-crushing and stem-removing screening drum, characterized in that: include: A cylinder (100), wherein the central axis of the cylinder (100) is arranged to be inclined relative to a horizontal plane, an end of the cylinder (100) with a higher horizontal height is set as a feeding end (110), a first screening component is arranged on the inner side wall of the cylinder (100), and a plurality of first strip-shaped screen holes are arranged on the first screening component, and the length of the first strip-shaped screen holes extends along the central axis direction of the cylinder (100); A lifting plate assembly (200) is arranged on the inner side wall of the cylinder (100), and comprises a plurality of axial lifting plates (210) arranged parallel to the length direction of the first strip sieve holes, and a plurality of inclined lifting plates (220) arranged at an angle to the length direction of the first strip sieve holes, wherein the plurality of inclined lifting plates (220) and the axial lifting plates (210) are arranged at intervals.

2. The stem crushing and sieving drum according to claim 1, characterized in that: The inclined lifting plate (220) is adjacent to the feed end (110) of the cylinder (100), and the axial projection length of the inclined lifting plate (220) along the cylinder (100) accounts for 1 / 5 to 2 / 5 of the axial projection length of the cylinder (100).

3. The stem crushing and sieving drum according to claim 1 or 2, characterized in that: The axial lifting plate (210) comprises a supporting portion (211), one end of the supporting portion (211) close to the center of the cylinder (100) in the radial direction of the cylinder (100) is connected to an extension portion (212), the extension portion (212) is adjacent to the feed end (110) of the cylinder (100), and the axial projection length of the extension portion (212) along the cylinder (100) accounts for 2 / 5 to 1 / 2 of the axial projection length of the cylinder (100).

4. The stem crushing and sieving drum according to claim 1, characterized in that: The first screening component comprises a plurality of axial screening rods (120) arranged axially parallel to the cylinder (100), and the first strip-shaped screening holes are formed between two adjacent axial screening rods (120).

5. The stem crushing and sieving drum according to claim 1, characterized in that: A second screening component is also provided on the inner side wall of the cylinder (100), and the second screening component is arranged on a side of the cylinder (100) away from the feed end (110). The second screening component is provided with second strip sieve holes (131) which are arranged perpendicular to the length direction of the first strip sieve holes.

6. The stem crushing and sieving drum according to claim 5, characterized in that: The lifting plate assembly (200) further comprises a plurality of radial lifting plates (230), wherein the radial lifting plates (230) are arranged on the second screening assembly, and the radial lifting plates (230) are arranged at an angle of 0 to 20 degrees relative to the length direction of the second strip-shaped screen holes (131).

7. The stem crushing and sieving drum according to claim 6, characterized in that: The radial lifting plates (230) are arranged at intervals from the axial lifting plates (210); the radial lifting plates (230) between two adjacent axial lifting plates (210) are set as a unit; at least two groups of radial lifting plates (230) are provided in one unit; and two adjacent groups of radial lifting plates (230) are arranged alternately and at intervals along the central axis direction of the cylinder (100).

8. The stem crushing and sieving drum according to any one of claims 1 to 2 and 4 to 7, characterized in that: The lifting plate assembly (200) further comprises a retention plate (240), wherein the retention plate (240) is arranged on the axial lifting plate (210) and / or the inclined lifting plate (220).

9. The stem crushing and sieving drum according to any one of claims 1 to 2 and 4 to 7, characterized in that: The lifting plate assembly (200) further comprises a buffer lifting plate (250), wherein the buffer lifting plate (250) is arranged at the feed end (110), and the buffer lifting plate (250) is arranged at an angle of 5° to 20° with respect to the radial direction of the cylinder (100).

10. A device for removing and screening broken stems, characterized in that: The stem-crushing and stem-removing screening cylinder according to any one of claims 1 to 9 further comprises: An outer cover assembly, the outer cover assembly comprising a cover body (300) arranged outside the cylinder (100), the cover body (300) being provided with a broken stem drop hopper (310), a tobacco stem drop hopper (320) and a stem drop hopper (330) in sequence along the feeding end (110); A support assembly, wherein the outer cover assembly is arranged on the support assembly; A driving assembly is connected to the screening drum in a driving manner to drive the screening drum to rotate.

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