Roller screen roller for screening threshed tobacco flakes

Abstract

A roller screen roller for screening threshed tobacco sheets comprises a carrier roller, flange plates are fixed to the two ends of the carrier roller, a rotating shaft is fixed in the carrier roller in a penetrating mode, a plurality of shifting forks are arranged outside the carrier roller, each shifting fork comprises a circular ring, six fork teeth are evenly fixed to the circular ring in the radial direction, and a through hole and a screw hole are formed in the circular ring in the axial direction. Two through holes are formed in the axial direction of the flange plates, the two flange plates and the shifting forks are fixed together through the first lead screw and the second lead screw, and specifically, the first lead screw sequentially passes through the through hole of the flange plate on the left side, the screw holes or the through holes of all the shifting forks and the through hole of the flange plate on the right side and is finally in threaded fit with the nut. Compared with the prior art, the tobacco leaf screening device has the technical effects that the screw rod is matched with the screw hole, the size of the screening seam can be conveniently adjusted through the screw rod, and the specific numerical value of three-level classification of different tobacco leaves is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of tobacco manufacturing, and particularly relates to a roller screen for screening tobacco flakes after threshing. Background Art

[0002] Threshing and redrying tobacco shape control equipment is used during tobacco processing to control and sort the shape and size of tobacco leaves after threshing and destemming. This type of equipment plays an important role in improving tobacco processing quality and meeting the specific requirements of the tobacco industry for tobacco raw materials.

[0003] like Figure 1 The leaf threshing and re-roasting sheet shape control equipment includes an upper screen 80 and a lower screen 81. The upper screen 80 and the lower screen 81 have the same structure, both including multiple rollers 82. Each roller 82 is equipped with a fixed fork 83. The fork 83 has six fork tines 84 evenly fixed in the radial direction. The forks 83 of two adjacent rollers 82 overlap, and the gap between the two adjacent forks 83 is the screen gap. The screen gap of the upper screen 80 is wider, and it is a primary screen; the screen gap of the lower screen 81 is narrower, and it is a secondary screen.

[0004] During use, tobacco leaves 90 (including large pieces 91, medium pieces 92, and small pieces 93) enter the leaf beating and redrying sheet shape control equipment, and the rollers 82 of the upper screen 80 and the lower screen 81 rotate counterclockwise. The large pieces 91 in the tobacco leaves 90 cannot enter the screen gaps of the upper screen 80 and continue to move forward, while the medium pieces 92 and small pieces 93 can pass through the screen gaps of the upper screen 80 and enter the lower screen 81; the medium pieces 92 in the tobacco leaves 90 cannot enter the screen gaps of the lower screen 81 and continue to move forward, while the small pieces 93 can pass through the screen gaps of the lower screen 81 and continue to fall. In this way, three-level separation of the tobacco leaves 90 is achieved.

[0005] However, different tobacco leaves have different requirements for the specific numerical values ​​of the three-level classification, and the spacing between the fixed forks 83 on the roller 82 (that is, the size of the screen gap) needs to be adjusted. Currently, such adjustment is difficult. Utility Model Content

[0006] The technical problem to be solved by the utility model is: how to design a roller screen roller for screening tobacco flakes after threshing, in which the size of the screen gap can be adjusted.

[0007] The technical solution of the utility model is specifically as follows:

[0008] A roller screen roller for screening tobacco flakes after leaf threshing, comprising a roller, both ends of which are fixed with flanges, a fixed rotating shaft passing through the roller, a plurality of shift forks arranged outside the roller, the shift fork comprising a circular ring, six fork teeth evenly fixed in the radial direction of the circular ring, a through hole and a screw hole provided in the axial direction of the circular ring, two through holes provided in the axial direction of the flange, the two flanges and the plurality of shift forks are fixed together by a first screw rod and a second screw rod, specifically: the first screw rod passes through the through hole of the flange on the left, the screw holes or through holes of all the shift forks, and the screw holes or through holes of the right flange in sequence. The through hole of the flange on the side, and finally cooperate with the nut thread, the screw rod and the screw hole are all threaded, and are clearance fit with the through hole, and are clearance fit with the through hole of the flange, wherein the first screw rod is staggered through the screw hole and the through hole of the shift fork; the second screw rod passes through the through hole of the flange on the left side, all the through holes or screw holes of the shift fork, and the through hole of the flange on the right side in turn, and finally cooperates with the nut thread, the screw rod and the screw hole are all threaded, and are clearance fit with the through hole, and are clearance fit with the through hole of the flange, wherein the first screw rod is staggered through the screw hole and the through hole of the shift fork.

[0009] The roller and the shift fork are connected through a flat key and a keyway.

[0010] Compared with the prior art, the technical effect of the present invention is that the present invention is provided with a screw rod and a screw hole, and the size of the screen gap can be easily adjusted through the screw rod, meeting the "specific values ​​of different tobacco leaves for the three-level classification". BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the prior art.

[0012] Figure 2 It is a schematic diagram of the present utility model.

[0013] Figure 3 Schematic diagram of the top view of the shift fork.

[0014] Figure 4 It is a schematic diagram of the utility model in use.

[0015] Figure 5 for Figure 4 An enlarged diagram in the upper right corner of . DETAILED DESCRIPTION

[0016] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments thereof.

[0017] like Figure 2-3 A roller screen roller for screening tobacco leaves after leaf threshing comprises a roller 10, both ends of which are fixed with flanges 11, and a fixed rotating shaft 12 is passed through the roller 10.

[0018] The roller 10 is provided with a plurality of forks 20. The fork 20 includes a ring 25. Six fork teeth 21 are evenly fixed in the radial direction of the ring 25. A through hole 23 and a screw hole 22 are provided in the axial direction of the ring 25. Two through holes are provided in the axial direction of the flange 11. The two flanges 11 and the plurality of forks 20 are fixed together by a first screw rod 31 and a second screw rod 32. Specifically:

[0019] The first screw rod 31 passes through the through hole of the flange 11 on the left, the screw holes 22 or the through hole 23 of all the shift forks 20, the through hole of the flange 11 on the right, and finally is threadedly engaged with the nut 33. The screw rod 30 is threadedly engaged with the screw hole 22, has a clearance fit with the through hole 23, and has a clearance fit with the through hole of the flange 11. Among them, the first screw rod 31 passes through the screw hole 22 and the through hole 23 of the shift fork 20 alternately, and the specific order is: the screw hole 22 of the first shift fork 20, the through hole 23 of the second shift fork 20, the screw hole 22 of the third shift fork 20, the through hole 23 of the fourth shift fork 20... and so on.

[0020] The second screw rod 32 passes through the through hole of the flange 11 on the left, the through holes 23 or the screw holes 22 of all the shift forks 20, the through hole of the flange 11 on the right, and finally is threadedly engaged with the nut 33. The screw rod 30 is threadedly engaged with the screw hole 22, has a clearance fit with the through hole 23, and has a clearance fit with the through hole of the flange 11. Among them, the first screw rod 31 passes through the screw hole 22 and the through hole 23 of the shift fork 20 alternately, and the order is: the through hole 23 of the first shift fork 20, the screw hole 22 of the second shift fork 20, the through hole 23 of the third shift fork 20, the screw hole 22 of the fourth shift fork 20... and so on.

[0021] In order to ensure rotation stability, the roller 10 and the shift fork 20 are connected through a flat key and a keyway.

[0022] Its working principle is:

[0023] Assembly, including the following steps:

[0024] S1. Put all the forks 20 outside the roller 10 and adjust the distance between two adjacent forks 20 (that is, the screen gap) to the design requirements;

[0025] S2. Screw the first screw rod 31 through the through hole of the left flange 11, all the screw holes 22 or through holes 23 of the shift fork 20, and the through hole of the right flange 11, and finally engage with the nut 33 to complete the fastening of the first screw rod 31;

[0026] S3. Screw the second screw rod 32 through the through hole of the left flange 11, all the through holes 23 or screw holes 22 of the shift fork 20, and the through hole of the right flange 11, and finally engage with the nut 33 to complete the fastening of the first screw rod 31;

[0027] S4. End.

[0028] When using, see Figure 1 The flange 11 and the two screw rods 30 are the rollers of the prior art. When the external force drives the half shaft 11 to rotate, the half shaft 11 drives the shift fork 20 through the flange 11 and the two screw rods 30 to achieve the three-level separation of tobacco leaves, which will not be repeated here.

[0029] When the size of the screen gap needs to be adjusted, take the example of enlarging the gap, see Figure 4-5 :

[0030] S1. Loosen the two nuts 33 and simultaneously screw the first screw 31 or the second screw 32. The screw rotates (without axial displacement). All the forks 20 of the roller 10 will move axially as a whole ( Figure 4 The middle is moving to the left, see reference numeral 61).

[0031] S2. The distance between the "fork tine 21 of the fork 20 after the roller 10 moves" and the "fork tine 21 of the fork 20 corresponding to the left side of the adjacent roller 10" (see the figure mark d1, hereinafter referred to as the left distance) will become smaller; the distance between the "fork tine 21 of the fork 20 after the roller 10 moves" and the "fork tine 21 of the fork 20 corresponding to the right side of the adjacent roller 10" (see the figure mark d2, hereinafter referred to as the right distance) will become larger.

[0032] S3. Fix the two nuts 33.

[0033] In the above step S2, when the left distance d1 becomes smaller, the sieve gap cannot screen the "larger tobacco leaves", and the screening efficiency is slightly reduced; however, when the right distance d2 becomes larger, the sieve gap can screen the "larger tobacco leaves".

[0034] In this way, although the screening efficiency is slightly reduced, it becomes convenient to adjust the size of the screen gap.

[0035] For other contents, please refer to the prior art.

[0036] The above description is only the preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be regarded as the scope of protection of the present invention.

Claims

1. A roller screen for screening tobacco flakes after threshing, comprising a roller (10), both ends of which are fixed with flanges (11), and a fixed rotating shaft (12) passing through the roller (10), characterized in that: A plurality of shift forks (20) are provided outside the roller (10), and the shift forks (20) include a circular ring (25), and six fork teeth (21) are evenly fixed in the radial direction of the circular ring (25). A through hole (23) and a screw hole (22) are provided in the axial direction of the circular ring (25), and two through holes are provided in the axial direction of the flange (11). The two flanges (11) and the plurality of shift forks (20) are fixed together by a first screw rod (31) and a second screw rod (32), specifically: The first screw rod (31) passes through the through hole of the left flange (11), all the screw holes (22) or through holes (23) of the shift fork (20), the through hole of the right flange (11), and finally is threadedly engaged with the nut (33). The screw rod (30) is threadedly engaged with the screw hole (22), is clearance-engaged with the through hole (23), and is clearance-engaged with the through hole of the flange (11). The first screw rod (31) is staggered through the screw hole (22) and the through hole (23) of the shift fork (20); The second screw rod (32) passes through the through hole of the left flange (11), all the through holes (23) or screw holes (22) of the shift fork (20), the through hole of the right flange (11), and finally is threadedly engaged with the nut (33). The screw rod (30) is threadedly engaged with the screw hole (22), has a clearance fit with the through hole (23), and has a clearance fit with the through hole of the flange (11). The first screw rod (31) passes through the screw hole (22) and the through hole (23) of the shift fork (20) in an alternating manner.

2. The roller screen for screening tobacco flakes after threshing according to claim 1, characterized in that: The roller (10) and the shift fork (20) are connected via a flat key and a keyway.

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