CN1233435A

CN1233435A - Apparatus for supplying tobacco to cigarette rod making machine

Info

Publication number: CN1233435A
Application number: CN 99105336
Authority: CN
Inventors: U·海特曼
Original assignee: Hauni Maschinenbau GmbH
Current assignee: Koerber Technologies GmbH
Priority date: 1998-04-30
Filing date: 1999-04-30
Publication date: 1999-11-03
Anticipated expiration: 2019-04-30
Also published as: DE19819441A1; JPH11332542A; EP0953298A1; PL332766A1; CN1118252C

Abstract

The invention relates to an apparatus for supplying tobacco to cigarette rod making machine. The device has a pneumatic conveying conduit through which the tobacco passes from the stocker to the air separator recur to airflow. The separator has a tobacco separating zone with a tobacco outlet and an air exhausting area connected to the tobacco outlet by air suction pipe. The tobacco separating zone is designed a sieving room with a plurality sieving walls which is surrounded by air exhausting chamber having air permeability connected to the air-pressure pipe. After separating the tobacco, the air is flowing into the air exhausting chamber through sieving wall from the sieving room. The inlet and outlet for the chamber are axially aligned.

Description

The apparatus for supplying tobacco of cigarette machine

The present invention relates to a kind of pneumatic feeding device of tobacco leaf of the cigarette machine supply chopping to tobacco processing, have a pneumatic conveying pipeline and an air separator that links to each other with the pneumatic conveying pipeline.Air separator has the tobacco leaf Disengagement zone and the air extraction district that links to each other with source of suction once aspirating air pipe of a band tobacco export.

The device of the above-mentioned type is used for supplying tobacco leaf from accumulator as required to the measurer of cigarette machine.In order in cigarette machine, to make cigarette, to use tobacco leaf usually.Tobacco leaf is mixed by the tobacco leaf fiber of the different length of different cultivars, and by certain prescription preliminary treatment.It is cigarette bundle and the uniform density of the cigarette that is become by the cigarette tractotomy and the important prerequisite of hardness that maintenance mixes with it uniformly until the density of the tobacco leaf of cigarette bundle.Also its density is the same to have material impact for the product quality of being produced with keeping in the good and mixing uniformly of tobacco leaf.

Disclose a kind of device of the above-mentioned type corresponding to DE35 42 598 C2 of US4 685 476, this device has a tobacco leaf separation chamber and an air extraction chamber that is spaced from by the screening wall above it.Carry air upwards to extract out, and in the tobacco leaf separation chamber, assemble tobacco leaf by screening wall and air extraction chamber, fill up in the tobacco leaf separation chamber back by base plate to the measurer feed that is connected with cigarette machine.Monitoring and the speed of selecting to carry air best are so that avoid the damage of tobacco leaf fiber and the change of tobacco leaf density by constant as far as possible transport condition.But, because in this device, it is very dark that exhaust tube inserts the air extraction chamber, air is just extracted out to a side by the screening wall, therefore, in these chambers, produce powerful air-swirl, and the different component of tobacco leaf mixture is produced different effects, thereby cause the obviously inhomogeneous of tobacco leaf, it is unfavorable that the product quality of being produced is brought.

The objective of the invention is to, the device of another kind of the above-mentioned type is provided, especially to the cigarette machine feed time, also can farthest reduce or avoid the inhomogeneous of tobacco leaf.

According to the present invention, this purpose is to realize like this in the device of the above-mentioned type, be that the tobacco leaf Disengagement zone is designed to be connected the screening chamber with a plurality of ventilative screening walls on the pneumatic conveying pipeline, the air extraction district is designed to surround in a plurality of sides by spacing the air extraction chamber of screening chamber.Carry the extraction of air to reduce the formation of eddy current when extracting the conveying air out, thereby reduced the inhomogeneous of tobacco leaf, finally improved the quality of product in a plurality of sides of screening chamber.In addition, compare, carry many sides extractions of air to reduce the conveying air effect, thereby avoided the formation that the tobacco leaf of production process is rolled into a ball after the influence at the pressure that is accumulating on the indoor tobacco leaf of screening with known only deflating in a side.

Means described in the claim 2～5 make carries air farthest and equably to flow into the air extraction chamber from the screening chamber.Thereby tobacco leaf in the screening chamber in good condition with carry the air flow point from, and do not influence its uniformity.The particularly important is the feature of claim 3 therewith relatively, it causes screening the air stream of the maximum symmetry in the transition region of chamber and air extraction chamber; The feature of claim 4 allows that air flows into the air extraction chamber along the axis of pneumatic conveying pipeline from the screening chamber, and the feature of claim 5 makes and carries the most direct approach in air stream edge, no eddy current ground from screening the chamber to pump-line deflection.

Claim 6 comprises the feature that device can take out the tobacco leaf of gathering simply from the screening chamber.For this reason, a diapire of screening chamber is made of a diapire of air extraction chamber, and this diapire designed to be used the exit plate of tobacco leaf and is operated the tobacco leaf that is used to export gathering.This structure can make the diapire according to the screening chamber of claim 7 not constitute as ventilative sliding panel as the screening wall.Help as this structure of the diapire of sliding panel that tobacco leaf is all even to be filled up the screening chamber fully and make tobacco leaf become easy from the output of screening chamber.

Structure of the present invention according to claim 8 has enlarged the charge of screening the chamber in a simple manner, has realized the economic transactions of this device.The feature of claim 9 provides the possibility of observing from the outside and controlling screening chamber filler.Claim 10 and 11 feature have been improved with the filler of tobacco leaf to the screening chamber.

Improvement structure of the present invention according to claim 12 to 14 has guaranteed the certain air stream between the inwall of screening chamber and air extraction chamber at utmost filling the screening chamber of tobacco leaf at the latest.This air stream preferably is adjusted to can take away dust that is deposited on the wall and the cleaning clocklike that is used for the inwall of air extraction chamber in each filler process.According to claim 12, it is in the conveyance conduit half that the cross section between screening chamber and the air extraction chamber is chosen in the indoor air velocity of the screening of filling up tobacco leaf.Measure with

claim

13 and 14 can make the indoor air velocity of air extraction roughly keep constant.

According to the structure of apparatus of the present invention of claim 15 to 17 process in can visual inspection apparatus, especially screen the filler state of chamber.Wherein be used for clean window according to the air stream that claim 12 to 14 produced.The measurer that the feature of claim 18 makes the tobacco leaf input that will assemble be connected with cigarette machine becomes easy.

The invention has the advantages that, the tobacco leaf of pneumatic conveying screening indoor and at utmost non-vortex air flow point from, thereby with the damage of tobacco leaf with inhomogeneously reduce to minimum.Thereby product density that adopts the present invention to bring to make and hardness by tobacco leaf evenly, thereby improved quality.

Further specify the present invention by means of accompanying drawing below.Wherein:

Fig. 1 has the diagrammatic cross-section fragmentary of measurer of the cigarette machine of feeding device of the present invention;

Fig. 2 is by the schematic sectional view of another program of apparatus of the present invention;

Fig. 3 does not have measurer according to the vertical view of the feeding device of the present invention of Fig. 1;

Fig. 4 is according to the schematic sectional view of the another scheme of device of the present invention;

The side view of Fig. 4 device that Fig. 5 looks along arrow V.

Fig. 1 represents the cutaway view of measurer 1 of VE100 type of cigarette machine of applicant's the Protos type with feeding device 2.The structure example of measurer is as having done complete description in applicant's US-S4651758.Accumulate in the tobacco supply container 3 in batches in the feeding device 2, in container 3, constitute tobacco leaf storing 4 by tobacco leaf fiber.The horizontal level of tobacco leaf storing 4 can be with the not shown detector detector monitors of a raster mode for example.If the horizontal level of tobacco leaf storing 4 drops to below the certain value, then further supply tobacco leaves to container 3 from feeding device 2.Take out tobacco leaf and flow to the accumulator that another is positioned at paddle formula roller 6 belows and does not have expression in the drawings by means of paddle formula roller 6 from container 3.Take out the tobacco leaf of one deck chopping and it is conveyed into storing well 9 from the abrupt slope conveyer belt 8 of this another accumulator, in storing well 9, form tobacco leaf post 11 thus with a belt scraping plate 7.For example form the tobacco leaf bundle that manufacturing cigarette is used by tobacco leaf contained in the tobacco leaf post 11 by disclosed mode among the US-PS4651758.

Feeding device 2 has an air separator 37 and a tobacco leaf Disengagement zone and an aspirating chamber 19 as screening chamber 12 formations.The pneumatic conveying pipeline 13 that the tobacco leaf of chopping is used is carried in access one in this tobacco leaf Disengagement zone, connects an aspirating air pipe 21 (Fig. 3,5) on aspirating chamber 19.Especially can find out from Fig. 1 and 3, the sidewall 14 and the 14a of screening chamber, a last ancient piece of jade, round, flat and with a hole in its centre 16 and front bulkhead 17 are made of ventilative screening wall.Conveyance conduit 13 passes aft bulkhead 18 about central authorities greatly and feeds the screening chamber.Advantageously, the end of conveyance conduit before feeding screening chamber 12 is linearly extended, because avoided the additional deflection of tobacco leaf like this.The additional deflection of tobacco leaf is owing to the different centrifugal force that acts on the different tobacco leaf particles causes inhomogeneous.If it also is favourable that conveyance conduit 12 feeds screening chamber 12 by one towards horizontal predetermined angle as shown in Figure 5 with being directed upwards towards.Guaranteed especially even filling by this measure to very long screening chamber 12.The size of the inclination alpha of conveyance conduit 13 is preferably selected according to the length of screening chamber 12.

Side, the top and end face of screening chamber are surrounded by air extraction chamber 19.Air extraction chamber 19 is connected with a not shown low pressure source or source of suction through aspirating air pipe 21.Can regulate the speed of carrying air with a choke block 22 that is arranged in the aspirating air pipe 21.Wall 23, the 23a and 24 of air extraction chamber 19 breathe freely, and as shown in figs. 1 and 3, can be made of for example light transmissive material of acryl glass.Like this, the operating personnel of machine just can observe the process in the feeding device from the outside.

In the embodiment of Fig. 1 device, the last ancient piece of jade, round, flat and with a hole in its centre 24 of air extraction chamber 19 and front bulkhead 23 can swingingly be hinged on the housing around balance staff 26.So just can open feeding device, interfere this device from the outside.

Screening chamber 12 and air extraction chamber 19 have a public ventilative base plate 27.Base plate 27 is hinged on the housing on balance staff 28 and can opens or close by means of operating mechanism 29 pneumatic or that surge when needed.Operating mechanism 29 can be the swingingly rack-mounted pneumatic or lift cylinder of surging, and its operating parts 31 is hinged on the bar 32 that links to each other with base plate 27.

In the embodiment of device shown in Figure 2, the wall 23 of air chamber, 23a and 24 are made by lighttight material, and base plate 27 is printing opacities.In order to see the inside of feeding device from the outside, the top of the antetheca 33 of measurer is made by the acryl of printing opacity or other light transmissive material.Even in this case,

air chamber walls

23 and 24 also can around balance staff for example balance staff 26 be hinged on the housing swingably.

Screening wall 14, the air chamber walls 23 that 14a is adjacent with each, the size of the spacing A (Fig. 1) between the 23a and 24 are made, and the conveying air that flows out by the screening wall when filling up screening chamber 12 is at least substantially crossed cavity flow between screening wall and the air chamber walls to pump-line to be enough to take away the velocity flow that sticks to the dust on the air chamber walls.By this mode, the air space that constitutes as window in the embodiment in figure 1 is cleaned to such an extent that can see the inside of feeding device at least.The inlet region that spacing A between screening wall and the adjacent air space is preferably in the screening chamber is very big, makes screening wall and adjacent air chamber walls 23, cross-sectional area that the cross-sectional area F1 (referring to Fig. 3) between the 23a and 24 is conveyance conduit 13 two times.Cross section F constantly increases towards the side of bleeding of air extraction chamber 19.End in the screening chamber, the cross-sectional area F2 between screening wall and air chamber walls 23, the 23a and 24 is the cross-sectional area of conveyance conduit 13 three times (referring to Fig. 3).

Before feeder process began, feeding device was empty, and base plate 27 is being closed.Then, begin feeder process by starting, thereby in feeding device and pneumatic conveyance conduit 13, have the air of conveying stream to flow through, screen chamber 12 and the never illustrated accumulator of tobacco leaf is transported to that link to each other, the not shown air-breathing air source of aspirating air pipe 21.To carry the speed v of cavity to be adjusted to for example v=17 meter per second by means of the choke block in the aspirating air pipe 21 22.Screening chamber 12 still was empty when the filler process began, therefore, carry air can to around by

screening wall

14,14a, 16 and end wall 17 flow out, wherein carry the flow direction of air to remain on as much as possible, thereby avoid to make the formation of tobacco leaf by the uneven air-swirl of undesirable mode towards aspirating air pipe 21.To this favourable also having by screening the aspirating air pipe 21 and the conveyance conduit 13 mutual adjustings to a line of chamber 12.Conveyance conduit 13 before feeding screening chamber 12 linear structure and its help intact filling screening chamber 12 and do not have the bigger inhomogeneous of tobacco leaf towards horizontal incline direction with angle [alpha].If screening chamber 12 further feed and filling up, as for example shown in Figure 3, the major part of then carrying air flows out and flows through to screen between chamber and air chamber walls 23, the 23a and 24 from screening chamber side direction shown in the arrow among Fig. 3 34 and flows to aspirating air pipe 21.Because the adjacent wall 23 of screening chamber and air extraction chamber, the cross-sectional area F that the cross-sectional area F1 between the 23a and 24 is conveyance conduit 13 two times, therefore, the speed of the conveying air here is approximately half of conveyance conduit, but also be enough to all the time be deposited on the air chamber walls 23, dust on the 23a and 24 takes away and imports aspirating air pipe.The continuous change of the cross-sectional area of intermediate cavity from entrance side to the side of bleeding between screening chamber and the air extraction chamber is big indoor owing to the there constantly increases the increase that the tobacco leaf of assembling makes flow resistance corresponding to screening haply.The tobacco leaf of assembling makes increasing conveying air flow out and flow through the intermediate cavity between screening chamber and the air extraction chamber from the screening chamber.

The roughly symmetric arrangement of screening chambers 12 in the air extraction chamber 19, the side end face of especially bleeding in a plurality of sides have the layouts that the structure of screening chamber of screening wall and conveyance conduit 13 and aspirating air pipe 21 aim at mutually makes that having best non-vortex air in feeding device flows, and can begin steadily and in good condition from air stream, to isolate tobacco leaf in distolateral 17 downstream of screening chamber 12, the inhomogeneities of tobacco leaf does not appear.Make the wall intense clear of air extraction chamber when air stream constantly fills up in the screening chamber simultaneously owing to the said structure of feeding device, because most of air of carrying flows through the intermediate cavity between screening chamber and the air extraction chamber and takes away the dust that is deposited on the wall with the wall of higher relatively speed along air extraction chamber 19.Like this, in each filler process, strong cleaning has been made in the inboard of the wall 23 of air extraction chamber, 23a and 24.If these walls are designed to window then especially favourable.

In case tobacco leaf is filled up in the screening chamber, carry circulation of air to cross to close source of suction and interrupt.The tobacco leaf that accumulates in the screening chamber 12 is supplied with tobacco leaf accumulator 4 by opening base plate 27 then, in case its horizontal level drops to below the predetermined value.

Another program of having represented feeding device among Fig. 2 with chain-dotted line.The bottom surface 36 of wherein screening the chamber also is designed to screening face.Between the bottom surface 27 of bottom surface 36 of screening the chamber and air extraction chamber, form an intermediate cavity in such a way.Portion of air can be passed through this intermediate cavity sucking-off.Bottom surface 36 can be opened by means of operating mechanism 29 together with the base plate 27 of air extraction chamber, supplies with measurer so that will accumulate in the indoor tobacco leaf of screening.

Figure 4 and 5 are represented the another scheme of feeding device.The bottom side of wherein screening chamber 12 is designed to groove 36.Groove 36 has ventilative sidewall and makes progress towards screening chamber 12 openings.The front side wall 38 of groove 36 is designed to window.The exit plate 27 of screening chamber is as diapire.Exit plate 27 can be made by light transmissive material equally, and like this, the antetheca 33 of the printing opacity that the filler process of screening chamber can be by exit plate and machine is observed.Groove 36 has enlarged the volume of screening chamber 12, can hold more tobacco leaf, thereby can operate economically.

Claims

1. to the pneumatic feeding device of the tobacco leaf of the cigarette machine supply chopping of tobacco processing, have pneumatic conveyance conduit and and be connected air separator on the pneumatic conveying pipeline, this air separator has the tobacco leaf Disengagement zone and the air extraction district that links to each other with source of suction once aspirating air pipe of a band tobacco export, it is characterized in that, the tobacco leaf Disengagement zone is designed to be connected a plurality of ventilative screening walls (14 of being with on the pneumatic conveying pipeline (13), 14a, 16,17) screening chamber (12), air extraction district are designed to surround with spacing (A) the air extraction chamber (19) of a plurality of sides of screening chamber (12).

2. device as claimed in claim 1, it is characterized in that, screening chamber (12) has first end wall (18) and second opposed end wall (17) and is connected described end wall and surrounds the sidewall (14,14a, 16,27) of the inner chamber that screens the chamber, the sidewall that a plurality of sidewalls are designed to breathe freely (14,14a, 16).

3. device as claimed in claim 2 is characterized in that, pneumatic conveying pipeline (13) feeds screening chamber (12) about central authorities by first end wall (18) greatly.

4. as claim 2 or 3 described devices, it is characterized in that, screening chamber (12) be designed to screen wall with first end wall (18) second opposed end wall (17), and be provided with the adjacent end wall compartment of terrain of air extraction chamber (19).

5. as described device one of in the claim 1～4, it is characterized in that the outlet opening of conveyance conduit (13) is aimed at aspirating air pipe (21) by screening chamber (12) point-blank.

6. as described device one of in the claim 1～5, it is characterized in that, the diapire (27) of screening chamber (12) is made of the diapire of air extraction chamber (19), and described diapire is designed to and will accumulates in the exit plate that the tobacco leaf supply company that screens in the chamber (12) is connected to the measurer (1) of cigarette machine.

7. as described device one of in the claim 1～6, it is characterized in that the sliding surface that the inner surface of the diapire (27) of screening chamber (12) is designed to breathe freely.

8. as described device one of in the claim 1～7, it is characterized in that the bottom side of screening chamber (12) is designed to the groove (36) with gas permeable wall.

9. device as claimed in claim 8 is characterized in that, window is made and be designed to the ventilative antetheca (38) of at least one of groove (36) by the material of printing opacity.

10. as described device one of in the claim 1～9, it is characterized in that, conveyance conduit (13) feed screening chamber (12) before straight line extend.

11., it is characterized in that conveyance conduit (13) tilts to extend upward towards the screening wall (16) of going up of screening chamber feeding screening chamber (12) before as described device one of in the claim 1～10.

12. as described device one of in the claim 1～11, it is characterized in that the cross-sectional area (F1) that screens the intermediate cavity between chamber (12) and air extraction chamber (19) in the scope of first end face (18) of screening chamber is approximately two times of cross-sectional area (F) of conveyance conduit (13).

13. as described device one of in the claim 1～12, it is characterized in that, the cross-sectional area of the intermediate cavity between screening chamber (12) and air extraction chamber (19) from first end face (18) of screening chamber to constantly increase of second end face (17).

14. as described device one of in the claim 1～13, it is characterized in that the cross-sectional area that screens the intermediate cavity between chamber (12) and air extraction chamber (19) in second end face (17) scope of screening chamber is approximately three times of cross-sectional area (F) of conveyance conduit (13).

15. as described device one of in the claim 1～14, it is characterized in that, at least one wall of air extraction chamber (19) (23,23a, 24; 27) has a window of making by light transmissive material.

16. as described device one of in the claim 1～14, it is characterized in that, at least one wall of air extraction chamber (19) (23,23a, 24; 27) make by light transmissive material fully basically.

17. device as claimed in claim 16 is characterized in that, at least one wall of being made by light transmissive material (23,24) of air extraction chamber (19) is hinged on the air extraction chamber (19) swingably round balance staff (26).

18., it is characterized in that at least two mutual opposed end walls of screening chamber (12) (14,14a) are dispersed setting towards tobacco export as described device one of in the claim 1～17.