CN203304176U - Tobacco stalk multi-stage refining and screening device - Google Patents

Abstract

The utility model discloses a multi-stage thinning and screening device for tobacco stems, which comprises a screening drive device, a feed inlet, a crushed material outlet, and a sieve tool, and the sieve tool is driven by the screening drive device; Grate-shaped sieves, square-hole sieves, oval long-hole sieves, and round-hole sieves are arranged in sequence from bottom to bottom. The sieves include baffles, screens, and sieve feeding outlets; The sieve of the grate-shaped sieve corresponds to the sieve of the square-hole sieve; the sieve of the square-hole sieve corresponds to the debris collection tank, and the outlet of the sieve corresponds to the sieve of the elliptical long-hole sieve; The screen mesh of the long-hole sieve corresponds to the screen mesh of the round-hole sieve, and the screen mesh of the round-hole sieve corresponds to the debris collection tank. The utility model is equipped with different sieves in layers to effectively separate and screen the stem heads, overlong stems, long stems, short stems, broken stems, and broken foam of the tobacco stems after threshing and re-roasting and destemming. Unified, it is easier to meet the needs of the silk-making process, and it is convenient for the classification, packaging, storage and transportation of tobacco stems.

Description

A multi-stage thinning and screening device for tobacco stems

technical field

The utility model belongs to the technical field of tobacco processing equipment, and in particular relates to a tobacco stem multi-stage thinning and screening device which can separate different shapes of tobacco stem materials such as stem heads, broken stems, long and short stems, and stem foam.

Background technique

Compared with tobacco leaves, tobacco stems have lower tar content, their physical structure is similar to that of tobacco leaves, and they have strong fire-holding ability and low cost. In traditional tobacco production, tobacco stems are usually treated as waste. In order to adapt to the development trend of "harm reduction and tar reduction", tobacco stem raw materials are usually added in current cigarette production. For this reason, how to deal with tobacco stems, making it more adaptable to tobacco production has become a research hotspot in the tobacco industry. Domestic rebaking enterprises usually only have a specification parameter of 20mm for tobacco stem processing, that is, long tobacco stems > 20mm are long. The existing tobacco stem screening equipment is based on this design, and only two layers of screens are used to screen the length Stems, broken stems, and broken foam. On the one hand, the size of the sieve is simple and single. Without further refining the screening specifications of tobacco stems, it is impossible to effectively remove stem heads, excessively long stems and other materials that are not conducive to the subsequent processing of tobacco stems, which will affect the quality of tobacco after screening. The uniformity of stems; on the other hand, the shredding equipment used by domestic cigarette companies is from abroad, and they are all designed on the basis of inches. The current screens for tobacco stems are not screened with inches as the standard. At the same time, because the current short stem screen uses a metal woven square screen, some short stems will directly fall into the broken stem groove, resulting in poor purity of the packaged tobacco stems, so that the packaged tobacco stems cannot be well cleaned after screening. Adapt to the subsequent production of cut stems. For this reason, it is very necessary for the full utilization of tobacco stems to develop a multi-stage thinning and screening device for tobacco stems that can separate different forms of tobacco stem materials such as stem heads, broken stems, long and short stems, and stem foam.

Utility model content

The purpose of the utility model is to provide a tobacco stem multi-stage thinning and screening device capable of synchronously separating different shapes of tobacco stem materials such as stem heads, overlong stems, broken stems, long and short stems, and stem foam.

The purpose of this utility model is achieved in this way, including a screening drive device, a feed inlet, a crushed material outlet, a sieve tool, and the screening drive device drives the sieve tool; the sieve tool is a bar grate arranged in sequence from high to low Shaped sieve, square hole sieve, oval long hole sieve, round hole sieve, the sieve includes baffle, screen and sieve feeding outlet; the feed inlet corresponds to the screen of the bar grate sieve, the bar grate The screen of the sieve corresponds to the screen of the square-hole sieve; the screen of the square-hole sieve corresponds to the debris collection tank, and the outlet of the sieve corresponds to the screen of the elliptical long-hole sieve; the screen of the elliptical long-hole sieve Corresponds to the screen mesh of the round hole sieve, and the screen mesh of the round hole sieve corresponds to the debris collection tank.

The utility model is equipped with different sieves in layers, which can effectively separate and screen the stem head, overlong stem (>101.6mm), long stem, short stem, broken stem and broken foam of the tobacco stem after threshing and re-roasting and destemming , improve the screening efficiency of flue-cured tobacco stems and long stems, and effectively improve the screening efficiency of long stems while ensuring the pass rate of large and medium pieces. Packaging, storage and transportation.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model (not including the screening driving device);

Fig. 2 is a schematic cross-sectional view along A-A direction of Fig. 1;

Fig. 3 is the right view diagram of Fig. 1;

Fig. 4 is the screen mesh schematic diagram of bar grate sieve;

Fig. 5 is the screen mesh schematic diagram of square hole sieve;

Fig. 6 is the sieve schematic diagram of oval slotted sieve;

Fig. 7 is the screen mesh schematic diagram of circular hole sieve;

Among them: 1- feed inlet, 2- crushed material outlet, 3- sieve feeding outlet, 4- crushed material collection tank, 5- grate sieve, 6- square hole sieve, 7- oval long hole sieve , 8-round hole sieve.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings, but the utility model is not limited in any way. Any changes or improvements made based on the teaching of the utility model all belong to the protection scope of the utility model.

As shown in Figure 1, the tobacco stem multi-stage thinning and screening device of the present utility model includes a screening drive device, a feed inlet 1, a crushed material outlet 2, a sieve, and the screening drive device drives the sieve; The sieves are grate-shaped sieves 5, square-hole sieves 6, elliptical long-hole sieves 7, and round-hole sieves 8 arranged in sequence from high to low. The screen cloth of feed inlet 1 is corresponding bar grate shape sieve tool 5, and the screen cloth of bar grate shape sieve tool 5 is corresponding the screen cloth of square hole sieve tool 6; The sieve feeding outlet 3 corresponds to the screen mesh of the elliptical long-hole sieve 7; .

The grate spacing of the grate-shaped sieve 5 is 7~8mm, the sieve hole of the square hole sieve 6 is 2~2.5mm×2~2.5mm, and the sieve hole diameter of the round hole sieve 8 is 3~3.5 mm. mm.

The grate spacing of the grate-shaped sieve 5 is 7.3mm, the sieve hole of the square-hole sieve 6 is 2.36mm×2.36mm, and the sieve diameter of the round-hole sieve 8 is 3.18mm.

The sieve hole of the elliptical long-hole sieve 7 is an elliptical long hole of 3~5mm×20~32mm.

The sieve of the elliptical long-hole sieve 7 includes two types of elliptical long holes, the screen hole of the incoming material end is 3.2mm×32mm, and the screen hole of the discharge end is 4.76mm×20.64mm.

The distribution ratio of the sieve holes at the incoming material end and the sieve holes at the discharge end is 1:1.

The screen cloth of described square-hole sieve tool 6 is metal weaving screen cloth.

The sieve of the round hole sieve 8 is a punched hole sieve, the horizontal spacing of the sieve holes is 4mm, and the vertical spacing is 2.8mm.

The sieve of the elliptical long-hole sieve 7 is a punched hole sieve, and the horizontal spacing of the sieve holes is 4 mm, and the vertical spacing is 3.24 mm.

The sieve is inclined downward towards the discharge end.

Working principle of the utility model:

The screening of tobacco stems in the prior art adopts a secondary sieve, and the sieved tobacco stem raw materials are often mixed with stem heads, have a high content of too long stems, and have poor uniformity. The four-stage sieve set in layers of the utility model finely and sieves the tobacco stems of different specifications respectively after threshing, re-roasting and destemming. As shown in Figure 4, the sieve for primary screening is a grate-shaped screen. The grate-shaped screen is designed according to the size of the tobacco stem head and the overlong stem, which can effectively screen the stem head and the overlong stem. Rejection, reduce the quantity of this type of tobacco stems in the finished product, and provide high-quality raw materials for stem shredding. As shown in Figure 5, the sieve for the secondary screening is a square hole screen, which is set up to screen out broken stems and reduce the mixing of broken stems into the next-stage materials. As shown in Figure 6, the sieve for the third-stage screening is an oval long-hole sieve, with a sieve hole of 3~5mm×20~32mm, which is convenient to sieve the tobacco stems that meet the production needs (length); the current leaf threshing Most of the re-baking adopts formula threshing, which is to mix different parts and grades of tobacco leaves. The processed tobacco stems have certain differences due to different parts. In order to adapt to this situation, two specifications of sieve holes are used The upper tobacco stem and the middle and lower tobacco stem) can better screen the tobacco stems of the required specifications. As shown in Figure 7, the sieve for the fourth-stage screening is a round-hole screen, which can further screen out broken stems. The round holes formed by punching can reduce the short stems from being screened out and improve the utilization rate of raw materials.

Working process of the present utility model:

The tobacco stems after threshing and re-roasting and destemming enter the grate-shaped sieve 5 through the feed inlet 1, and the stem heads and overlong stems are separated by the grate and left on the sieve, and are sieved by the grate-shaped sieve 5. The feeding outlet 3 is separated, and other tobacco stem materials enter the screen of the square hole sieve 6 through the grate bar; the broken stems in the tobacco stem material are screened out by the square hole sieve 6, and fall into the debris collection tank 4, and the other tobacco stems The stalk material remains on the sieve, and enters the sieve of the elliptical long-hole sieve 7 through the sieve feeding outlet 3 of the square-hole sieve 6; the sieve material of the elliptical long-hole sieve 7 is tobacco stems that meet the production length requirements , through the sieve outlet 3 of the elliptical long-hole sieve 7 into the collection device, and the material under the elliptical long-hole sieve 7 falls into the round-hole sieve 8 (there will also be a very small amount of too long stems falling into it); The round-hole sieve 8 sieves, the broken stems and fines fall into the debris collection tank 4, and the sieved material of the round-hole sieve 8 is sent to the collection device through the sieve feeding outlet 3 (also qualified tobacco stem material) .

Example 1

Taking the processing of Qujing 1 K326 B3F tobacco as an example, the sieving device of the prior art and the device of the utility model are used to sieve the packaged finished product: (1) After sieving by the original sieving device, the packaged product is greater than 20mm The long-stem rate is 85.61%, the long-stem rate greater than 50.8mm is 28.41%, the over-long stem rate is greater than 101.6mm is 10.17%, and the short-stem rate is 4.22%. (2) After screening by the device of the present utility model, the percentage of long stems larger than 25.4 mm in the packaged finished product is 95.49%, the rate of long stems larger than 50.8 mm is 40.17%, the rate of excessively long stems larger than 101.6 mm is 3.21%, and the rate of short stems The rate is 1.3%.

Example 2

Taking the processing of Qujing 2 cloud 87 C3F tobacco as an example, the sieving device of the prior art and the device of the utility model are used to sieve the packaged product: (1) after the screening by the original sieving device, the packaged product is greater than The long-stem rate of 20mm is 86.24%, the long-stem rate of greater than 50.8mm is 29.77%, the rate of over-long stems greater than 101.6mm is 9.65%, and the rate of short-stem is 4.11%. (2) After screening by the device of the present utility model, the percentage of long stems larger than 25.4 mm in the packaged finished product is 97.22%, the rate of long stems larger than 50.8 mm is 42.17%, the rate of excessively long stems larger than 101.6 mm is 1.62%, and the rate of short stems The rate is 1.16%.

Carry out a month's production test according to the method same as embodiment 1, 2, show through statistics: after adopting the sieving device screening of prior art, in the tobacco stem raw material, the long stem rate greater than 20mm is 85.44%, greater than 50.8mm The long-stem rate of tobacco stems is 28.98%, the rate of over-long stems greater than 101.6mm is 10.04%, and the rate of short-stems is 4.52%; 96.14%, the long-stem rate greater than 50.8mm was 41.38%, the rate of over-long stems greater than 101.6mm was 2.24%, and the rate of short-stem was 1.62%. Apparently, all the indicators of the sieved tobacco stem raw materials are significantly improved.

Features of the utility model:

1. The utility model adjusts the screening specification of the original long stem from 20mm to 25.4mm (1 inch), improving the adaptability of the raw material to the imperial shredding equipment;

2. The four-stage sieve of the utility model has more refined screening, which can effectively separate and sieve stem heads, overlong stems, long stems, short stems, broken stems, and broken foam. Better indicators;

3. The uniformity of the tobacco stems screened by the device of the utility model is significantly improved, and the overall tobacco stems are relatively uniform in size and shape, which meets the requirements of the silk-making process.

Claims (10)

1. A multi-stage thinning and screening device for tobacco stems, comprising a screening drive device, a feed inlet (1), a crushed material outlet (2), and a sieve, and the screening drive device drives the sieve, which is characterized in that: The described sieves are grate-shaped sieves (5), square-hole sieves (6), elliptical long-hole sieves (7), and round-hole sieves (8), which are arranged in sequence from high to low. plate, screen and sieve feeding outlet (3); the feed inlet (1) corresponds to the screen of the grate-shaped sieve (5), and the screen of the grate-shaped sieve (5) corresponds to the square-hole sieve (6 ) screen; the screen of the square hole sieve (6) corresponds to the debris collection tank (4), and its sieve feeding outlet (3) corresponds to the screen of the elliptical long-hole sieve (7); the elliptical long-hole sieve The sieve of (7) corresponds to the sieve of the round hole sieve (8), and the sieve of the round hole sieve (8) corresponds to the debris collection tank (4). 2. The tobacco stem multi-stage thinning and screening device according to claim 1, characterized in that: the distance between the bars of the grate-shaped sieve (5) is 7-8mm, and the distance between the bars of the grate-shaped sieve (6) The sieve hole is 2 ~ 2.5mm * 2 ~ 2.5mm, and the sieve diameter of the round hole sieve (8) is 3 ~ 3.5mm. 3. The multi-stage thinning and screening device for tobacco stems according to claim 1 or 2, characterized in that: the distance between the bars of the grate-shaped sieve (5) is 7.3 mm, and the square-hole sieve (6 ) is 2.36mm×2.36mm, and the diameter of the round hole sieve (8) is 3.18mm. 4. The device for multi-stage thinning and screening of tobacco stems according to claim 1, characterized in that: the sieve hole of the elliptical long-hole sieve (7) is an elliptical long hole of 3~5mm×20~32mm. 5. The multi-stage thinning and screening device for tobacco stems according to claim 1 or 4, characterized in that: the sieve of the elliptical long-hole sieve (7) includes two types of elliptical long holes, and the incoming material The sieve hole at the end is 3.2mm×32mm, and the sieve hole at the discharge end is 4.76mm×20.64mm. 6. The tobacco stem multi-stage thinning and screening device according to claim 5, characterized in that: the distribution ratio of the sieve holes at the incoming material end and the sieve holes at the discharge end is 1:1. 7. The tobacco stem multi-stage thinning and screening device according to claim 1 or 2, characterized in that: the screen mesh of the square-hole sieve (6) is a metal woven screen mesh. 8. The tobacco stem multi-stage thinning and screening device according to claim 1 or 2, characterized in that: the screen of the round hole sieve (8) is a punched hole screen, and the horizontal spacing of the screen holes is 4mm , The vertical spacing is 2.8mm. 9. The multi-stage thinning and screening device for tobacco stems according to claim 1 or 4, characterized in that: the screen of the elliptical long-hole sieve (7) is a screen with punched holes, and the horizontal distance between the screen holes is 4mm, and the vertical spacing is 3.24mm. 10. The tobacco stem multi-stage thinning and screening device according to claim 1, characterized in that: said sieve is inclined downward toward the discharge end.

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