WO2010051969A1 - Équipement et procédé d'amenée de tabac haché entre une unité de chargement du tabac et une machine de transformation du tabac - Google Patents

Équipement et procédé d'amenée de tabac haché entre une unité de chargement du tabac et une machine de transformation du tabac Download PDF

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Publication number
WO2010051969A1
WO2010051969A1 PCT/EP2009/007871 EP2009007871W WO2010051969A1 WO 2010051969 A1 WO2010051969 A1 WO 2010051969A1 EP 2009007871 W EP2009007871 W EP 2009007871W WO 2010051969 A1 WO2010051969 A1 WO 2010051969A1
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WO
WIPO (PCT)
Prior art keywords
tobacco
sensor
buffer
cut tobacco
conveyor
Prior art date
Application number
PCT/EP2009/007871
Other languages
German (de)
English (en)
Inventor
Karsten Eckert
Dietmar Zielke
Frank Weimann
Original Assignee
Hauni Maschinenbau Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41595079&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2010051969(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hauni Maschinenbau Ag filed Critical Hauni Maschinenbau Ag
Priority to CN200980144367.8A priority Critical patent/CN102209475B/zh
Priority to EP09744974.8A priority patent/EP2369949B1/fr
Priority to PL09744974T priority patent/PL2369949T3/pl
Publication of WO2010051969A1 publication Critical patent/WO2010051969A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/39—Tobacco feeding devices
    • A24C5/397—Tobacco feeding devices with means for regulating the tobacco quantity
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
    • A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
    • A24C5/39—Tobacco feeding devices
    • A24C5/392—Tobacco feeding devices feeding pneumatically

Definitions

  • the invention relates to a device for supplying cut tobacco from a tobacco feeding unit to a tobacco processing machine, with a conveyor, which is connectable with at least one tobacco feeding unit and with at least one tobacco processing machine and provided for the promotion of cut tobacco, an adjusting means for influencing the Conveying speed of the cut tobacco in the conveyor, a sensor device and a control device which is connected to the sensor device and the adjusting means and provided for controlling the actuating means in response to a signal output by the sensor device for controlling the conveying speed to a predetermined value.
  • the invention relates to a method for supplying cut tobacco from a tobacco feeding unit to a tobacco processing machine, preferably a cigarette manufacturing machine, in which cut tobacco conveyed via a conveyor of at least one tobacco feeding unit to at least one tobacco processing machine, the conveying speed of the cut tobacco in the conveyor via an actuating means and affects Adjusting means in response to a signal output by a sensor device for the purpose of controlling the conveying speed is controlled to a predetermined value.
  • the tobacco supply usually takes place via tubular delivery lines, through which the tobacco is sucked by means of an air flow into a pre-storage or intermediate storage of the cigarette manufacturing machine.
  • This intermediate storage device which is also referred to as a lock, is usually located at the inlet of the cigarette manufacturing machine or forms an interface between a delivery line and the actual cigarette manufacturing machine.
  • the tobacco feed is usually carried out discontinuously, with the intermediate store being filled with tobacco in batches by conveying air. Such a loading phase typically takes about 20 to 30 seconds. If the buffer is full, the air delivery is switched off. After the cache has been emptied into the cigarette manufacturing machine and thereby the tobacco has been transferred to the cigarette manufacturing machine to be forwarded to cigarette production, a new filling cycle of the buffer is initiated by turning on the air stream.
  • the air ratios for tobacco production between the tobacco feeding unit and the cigarette making machine are adjusted so that sufficient tobacco is carried through the air to always supply the cigarette making machine safely.
  • the tobacco velocity depends essentially directly on the air velocity.
  • changes in the delivery line system for example in the case of a conversion or repair, changes in air conditions due to leaks in the cache
  • changes in the air generation system for example, by wear of the fan and load changes in the air by switching on or off further cigarette making machines, the air technology not decoupled from each other
  • the air velocity is undesirably affected, which has a negative effect especially after a single adjustment of the air velocity.
  • two pressure measuring points arranged one behind the other in the direction of flow are arranged on the conveying line and form between them a measuring path along which the pressure drop of the air flow is measured and fed as a differential pressure measured value to the control unit.
  • a further measuring point with a pressure sensor is arranged on the conveying line, wherein a system vacuum value measured therewith is fed to the regulating unit for the purpose of compensating the differential pressure measuring value.
  • the problem with this concept is mainly that the measured air velocity is proportional to the tobacco velocity only in a certain working range, and falling below the airspeed below a certain minimum value leads to the sudden stoppage of the tobacco flow, while at high air velocities there is a risk of destroying the tobacco.
  • control systems for a suction conveyor system based on a capacitive tobacco speed measuring system are known from the prior art.
  • DE 10 2006 011 742 B3 discloses such a system in which an adjustable control flap for controlling the air flow is arranged in the intake manifold and has a control unit connected to the control flap and a capacitive sensor connected to the control unit which controls the speed of the tobacco in the delivery line measures.
  • this concept can not rule out that if the tobacco flow rate changes at a constant tobacco velocity, which leads to a reduced tobacco throughput, the cigarette manufacturing machine receives too little tobacco.
  • a device for feeding cut tobacco from a tobacco feeding unit to a tobacco processing machine having a conveyor connectable to at least one tobacco feeding unit and to at least one tobacco processing machine and for conveying cut tobacco Adjusting means for influencing the conveying speed of the Thomastabaks in the conveyor, at least one sensor device and a control device which is connected to the sensor device and the adjusting means and provided for controlling the actuating means in response to a signal output by the sensor device for the purpose of controlling the conveying speed to a predetermined value , characterized in that the sensor device is designed for measuring the mass flow or the volume flow of the cut tobacco.
  • neither the velocity of the conveying medium, which is usually air, nor the tobacco velocity, but rather the mass flow or the volume flow of the cut tobacco are detected according to the invention for controlling the conveying speed.
  • the measurement according to the invention of the mass flow or of the volume flow the increase of the mass or the volume of the tobacco over the time can be determined exactly and according to the invention the quantity measurement takes place via a mass and / or volumetric flow measurement.
  • Volume and mass are directly related to the specific weight of the tobacco, the specific weight of the tobacco being significantly dependent on the humidity of the tobacco.
  • the invention provides a stable system capable of compensating for disturbances without adversely affecting tobacco velocity.
  • the invention allows simple and reproducible settings. At this point, for the sake of completeness, it should be noted that the term “conveying speed” is understood to mean the speed of the cut tobacco.
  • a preferred embodiment of the invention in which the conveyor has a buffer for the temporary storage of cut tobacco, is characterized in that the sensor device comprises a sensor arrangement for measuring the level of the buffer and an evaluation unit, which from the rate of increase of the level to the mass or volume flow of the cut tobacco.
  • This embodiment provides in a particularly simple way a way to determine the mass or volume flow of the cut tobacco by measuring over a period of the level of the buffer, which requires only structurally simple sensor, and from the increase in the level within a certain period of mass - or volume flow of the cut tobacco for the purpose of actual value detection for the feed control is determined.
  • the quantity measurement takes place on the filling level in the buffer.
  • the sensor arrangement has a plurality of sensors, which are arranged approximately in the direction of the increase in the filling level of the buffer next to or behind one another, wherein these sensors are preferably approximately in a row.
  • a particularly preferred embodiment of this sensor arrangement is characterized in that at least five discrete sensors or at least five sensor elements are provided in an integrally constructed sensor arrangement and in particular the respective distance between the discrete sensors or sensor elements does not exceed one fifth of the total length of the buffer ,
  • a particularly fine-level level detection and control is given in particular if the respective distance between the discrete sensors or sensor elements is less than 50 mm.
  • Particularly advantageous for such a measurement are optical sensor units, each consisting of a light source and a photosensor.
  • the buffer is formed so that the increase of the level takes place approximately in the horizontal direction.
  • a pneumatically operated conveyor has been found that can be easily fill despite about horizontal extent of the cache.
  • a horizontal arrangement of the intermediate memory has the advantage of a low design.
  • the buffer may also be constructed such that the increase in the filling level takes place approximately in the vertical direction.
  • the individual sensors or sensor elements of a sensor arrangement used in this modified embodiment should be arranged one above the other substantially vertically and / or offset relative to the vertical.
  • Such a buffer forms expediently at the same time the storage of a pre-distributor of a cigarette manufacturing machine.
  • the buffer can optionally be part of the conveyor and in this case preferably sit in the area of their outlet, or be part of a downstream tobacco processing machine and in this case preferably sit in the area of their inlet or be provided as an interface between the conveyor and tobacco processing machine.
  • the conveyor operates substantially pneumatically and has a pneumatic conveying line and at least one adjustable throttle valve provided as actuating means for controlling the air flow in the pneumatic conveying line.
  • the throttle valve may be arranged upstream of the buffer or downstream of the buffer in a suction pipe, which is connected to an outlet of the buffer.
  • an electrical or pneumatic actuator can be provided in each case, with this actuator preferably being designed as a controlled drive and further as an electromotive or pneumatic servo drive for a precisely stepless and rapid angular adjustment of the throttle.
  • a further preferred embodiment of the invention is characterized in that the control device is designed to control the actuating means in dependence not only on a signal output from the sensor device, but additionally of at least one process variable of the tobacco processing machine for controlling the conveying speed to a predetermined value.
  • at least one process variable of the tobacco processing machine as additional auxiliary actual size becomes Fed control loop.
  • the control loop can be additionally supported in particular by measurement and / or control data from the tobacco processing machine. It is particularly advantageous to use the strand speed of the tobacco processing machine as the process variable, so that, for example, in the case of a drop in the strand speed, the throttling of the supplied mass or mass immediately results. Volumetric flow of cut tobacco can be reacted.
  • control device in addition to controlling the tobacco feeding unit.
  • a further preferred embodiment of the invention is characterized in that the control device is designed to control the actuating means in dependence not only on a signal output by the sensor device, but also by a proportional to the conveying air velocity signal which a known air speed sensor in the delivery line and / or in a suction tube is sandwichesges- shares.
  • the control circuit is fed an additional Hilfsisty which received for the purpose of optimization in the scheme and / or can be used for diagnostic purposes and also as an indicator to the operator of the cigarette manufacturing machine can be provided.
  • the control device processes, in addition to the signal emitted by the sensor device, which images the respective current fill level of the buffer, also the signal proportional to the transport air velocity and / or the at least one process variable of the tobacco processing machine such that a continuous optimization of the conveying air flow in terms of a gentle and safe uninterrupted tobacco promotion is given.
  • the control device can be designed self-learning. If, for example, an interruption of the tobacco stream occurs due to falling below a certain conveying air velocity, then the regulating device and / or a downstream controller stores the signal values available at the time of undershooting as limit values so as not to fall below these limits again at the conveying air flow velocity.
  • a volume or mass measurement is used as the basis for the regulation of a pneumatic charging device
  • the conveying device in such a case preferably as a belt conveyor and / or is designed as a screw conveyor.
  • a belt conveyor can convey the cut tobacco directly into a buffer which contains a sensor arrangement according to the invention, wherein discrete sensors or sensor elements provided for this purpose are preferably arranged one above the other.
  • a deviating sensor arrangement and in particular this upstream of the intermediate store, such a sensor arrangement preferably being in the form of a scale, in particular a belt scale.
  • a method for supplying cut tobacco from a tobacco feeding unit to a tobacco processing machine wherein cut tobacco is conveyed to at least one tobacco processing machine via a conveyor of at least one tobacco feeding unit, controlling the conveying speed of the cut tobacco the delivery device is influenced by an adjusting means and the adjusting means is controlled in dependence on a signal output by a sensor device for controlling the conveying speed to a predetermined value, characterized in that the mass flow or the volume flow of the Thomastabaks is measured by the sensor device.
  • FIG. 1 is a schematic block diagram of a tobacco feed system with a control system according to a first embodiment using a tobacco feeding station according to a first embodiment;
  • Figure 2 is a schematic block diagram of a tobacco feeding system with a control system according to the first embodiment using a tobacco feeding station according to a second embodiment
  • Figure 3 is a schematic block diagram of a tobacco feeding system with a control system according to a second embodiment using a tobacco feeding station according to the first embodiment
  • FIG. 4 is a schematic block diagram of a tobacco feed system with a control system according to the second embodiment using a tobacco feed system
  • Figure 5 schematically shows in block diagram a tobacco feeding system with a control system according to a third embodiment using a tobacco feeding station according to the first embodiment.
  • FIG. 1 schematically shows a tobacco feed station 2.
  • This tobacco feeding station 2 has a chamber 4 for receiving cut tobacco 6 (hereinafter usually abbreviated to "tobacco") .
  • the lower end of the chamber 4 is delimited by an endless belt conveyor 8, which is set in circulating motion by a drive device 10 Tobacco 6 resting on the belt conveyor 8 is conveyed to one end of the belt conveyor 8, from where it passes into an underlying hopper 12 and from there into a tubular outlet 14 connected to the lower end of the hopper 12.
  • the tobacco loading station points 2 computing wheels 16, which are rotated by the drive means 10 in rotation and return excess tobacco in the chamber 4.
  • the tobacco 6 is transported by means of a conveying device 20, which will be explained in greater detail below, to a tobacco processing machine, not shown in the figures, which is a cigarette manufacturing machine for the presently described embodiment.
  • the conveyor 20 operates pneumatically and has a pneumatic tubular delivery line 22 which is connected with its inlet at the outlet 14 of the tobacco feeding station 2 and with its outlet to a tubular inlet 24 of a buffer 26.
  • a pneumatic tubular delivery line 22 In the delivery line 22 there is a negative pressure, so that a corresponding suction air flow can promote the tobacco from the outlet 14 of the tobacco feeding station 2 in the buffer 26.
  • the intermediate storage means 26, which may also be referred to as a lock, is subdivided in the illustrated embodiment into an upper first chamber 28 and a lower second chamber 30, these two chambers 28, 30 being separated from one another by a sieve 32. As can also be seen from FIG.
  • the buffer 26 is arranged horizontally, and thus the two chambers 28, 30 and the screen 32 extend in the horizontal direction.
  • the inlet 24 leads into the upper first chamber 28, in which the tobacco collects, which is blown in the direction of arrow X coming from the pneumatic conveying line 22 and the inlet 24 into the first chamber 28.
  • the first chamber 28 fills successively from the distal first end wall 28a (in FIG. 1) toward the opposite (in FIG. 1 left) proximal second end wall 28b and thus in a direction opposite to the arrow X.
  • the buffer 26 operates doing so in the manner of a cyclone by the transport air flows from the pneumatic feed line 22 through the wire 32 into the lower second chamber 30 and passes through a suction pipe 34 in the direction of the arrow Y to the suction side of a fan, not shown. In this way, the tobacco 6 collected in the first chamber 28 is separated from the transport air.
  • the air delivery in the conveyor system 20 is switched off and interrupted in this way the influx of further tobacco.
  • the buffer 26 is emptied into the cigarette manufacturing machine, not shown, and thereby the tobacco 6 spent in the cigarette making machine to be forwarded to cigarette production before a new filling cycle of the buffer 26 is initiated by turning on the air flow again.
  • the loading of tobacco is thus discontinuous by the buffer 26 is intermittently filled with tobacco 6.
  • Such a loading phase typically lasts about 20 to 30 seconds.
  • the buffer 26 thus forms an interface between the conveyor 20 and the actual cigarette making machine and may either be part of the conveyor 20 and in this case preferably sit in the area of the outlet of the pneumatic conveyor line 22, as Figure 1 reveals, or be part of the downstream cigarette making machine and in this case preferably sitting in the area of their inlet.
  • a throttle valve 36 is provided in the illustrated embodiment as an actuator, which is located in the intake pipe 34 downstream of the intermediate schen acronym 26 sits and is opened or closed by a servomotor 38.
  • a servomotor 38 it is also conceivable to influence the air velocity in the delivery line 22 or in the intake pipe 34 by other types of actuators or alternatively by direct control of the fan, not shown.
  • the servomotor 38 for the throttle valve 36 is controlled by a control unit 40 which generates a corresponding control signal and transmits it via a line 42 to the servomotor 38 in order to be able to set the rotational position and thus the opening width of the throttle valve 36 to a desired value.
  • the amount of subsidized tobacco 6 is determined or evaluated and used as a significant actual size for the control by the control unit 40.
  • the increase of the filling level with tobacco 6 in the first chamber 28 of the intermediate store 26 is measured.
  • an elongated sensor arrangement 44 is provided, which extends in the longitudinal direction substantially over the entire length of the first chamber 28.
  • the sensor arrangement 42 is assigned to the first chamber 28 and arranged on or within it.
  • the sensor assembly 44 measures the continuous increase in fill level of the first chamber 28 of the buffer 26 with tobacco 6.
  • the air flow entering the first chamber 28 of the buffer 26 in the direction of the arrow X causes the increase in level to be approximately opposite in the horizontal direction the arrow X takes place, so the first chamber 28 is filled in the horizontal direction of Figure 1 from right to left with tobacco 6, the elongated sensor assembly 44 is aligned horizontally.
  • the sensor arrangement 44 has a plurality of sensors, not shown in detail in the figures, which are arranged approximately in the direction of increasing the filling level of the buffer 26 next to or behind one another, these sensors preferably being approximately in a row.
  • optical sensor units each consisting of a light source and a photosensor.
  • the sensor arrangement 44 for measuring the weight of the tobacco 6 accumulated in the first chamber 28 of the intermediate store 26.
  • the sensor arrangement 44 is connected via a line 46 to the control unit 40 and transmits to this a signal indicating the current level of the first chamber 28 of the buffer 26. Since during the filling of the first chamber 28 of the buffer 26 with tobacco 6, the level increases substantially continuously, this increase in the level in the output from the sensor assembly 44 measurement signal is expressed accordingly.
  • the change in the measurement signal from the sensor arrangement 44 due to the increase in the fill level of the first chamber 28 of the buffer 26 is used in the control unit 40 for determining the actual mass or volume flow of the tobacco 6 in the delivery line 22.
  • the determination of the instantaneous value of the mass or volume flow of the tobacco 6 in the conveyor 20 takes place via the level measurement.
  • Volume and mass are directly related to the specific weight of the tobacco.
  • the amount of tobacco can also be evaluated from the determination of the mass or volume flow when required.
  • the determined instantaneous value of the mass or volume flow is therefore used as the actual value for the control by comparing this value with a desired value and as a result of this comparison, the control unit 40 via the servomotor 38, the opening position of the throttle valve 36 sets or changed accordingly.
  • the speed of the air flow in the delivery line 22 is adjusted or changed accordingly. Since primarily the speed of the air flow in the delivery line 22 influences the mass or volume flow of the tobacco 6, the mass or volume flow of the tobacco 6 is regulated by the control concept described above. Thus, with the control concept described above, a direct control of the mass or volume flow of the tobacco 6 takes place.
  • the speed of the air flow is additionally measured and fed to the control unit 40 as an additional actual value or auxiliary actual value.
  • a corresponding sensor 48 is housed in the suction tube 34 in the illustrated embodiment and connected via a line 50 to the control unit 40, this sensor 48, for example, the differential pressure, dynamic pressure or impeller principle or as a photoelectric sensor using the Karmaschen Whirlwind effect can be formed.
  • at least one process variable from the downstream cigarette maker which is not shown in the figures, may be fed to the control unit 40 as a further auxiliary variable, as indicated by the dashed line 52 in FIG.
  • control circuit can be additionally supported, in particular by measuring and / or control data from the cigarette manufacturing machine, which can lead to further optimization of the control if necessary. It is particularly advantageous to use the machine speed of the cigarette manufacturing machine as the process variable or, in the event that the cigarette manufacturing machine is designed as a stranding machine, the strand speed, so that, for example, in the case of a sinking of the machine or line speed, immediately with the throttling of the supplied mass or Volume flow of the tobacco and thus with the throttling of the operation of the conveyor 20 can be reacted.
  • control unit 40 may be advantageous for the control unit 40 to generate and transmit a further signal for controlling the tobacco feed station 2, as is schematically indicated in FIG. 1 by the dashed line 54. With this additional control signal on the line 54, the control unit 40 controls the drive device 10 and thus the rotational speed of the belt conveyor 8 in the tobacco-feeding station 2.
  • the tobacco feed system shown in FIG. 2 differs from the feed system of FIG. 1 only by the use of a differently constructed tobacco feed station 100, as is known, for example, from EP 0 568 868 B1.
  • the embodiment of the tobacco feeding station 100 shown in FIG. 2 has an input hopper 104 through which the tobacco is introduced. Below the tapered lower outlet opening 104a of the input hopper 104 sits a horizontally extending and gently sloping distributor disc 108 in a chamber 110. The tobacco exiting the outlet port 104a of the input hopper 104 strikes the central portion of the underlying distributor disc 108.
  • the distributor disc 108 is exposed to vibration, which, in conjunction with gravity, causes the tobacco to move from the central area to the peripheral edge of the distributor disc 108.
  • a plurality of suction tubes 114 are arranged at a distance from one another, which suck in the tobacco distributed through the distributor disc 108 and convey it into the delivery line 22.
  • the suction tubes 114 are adjustable in their height and thus in their distance from the distributor disc 108 or to the bottom 110a of the chamber 110, for which purpose corresponding actuators are provided, which in FIG. These are not shown.
  • the control unit 40 controls in the embodiment shown in Figure 2 via the line 54, the actuators for the height adjustment of the suction pipes 114th
  • FIG. 3 shows a further exemplary embodiment of a tobacco charging system, which differs from the system according to FIG. 1 in that, instead of a sensor arrangement for measuring the filling level assigned to the first chamber 28 of the buffer 26, a direct measurement of the mass or volume flow of the tobacco 6 upstream of the Latch 26 takes place.
  • a corresponding sensor 144 is provided in the illustrated embodiment at the inlet 24 of the buffer 26.
  • this sensor 144 can be designed, for example, as a microwave sensor or as a high-frequency sensor.
  • FIG. 4 shows another embodiment of a tobacco feeding system, which differs from the tobacco feeding system according to FIG. 3 only in that a tobacco feeding station corresponding to the tobacco feeding station 100 shown in FIG. 2 is used, the structure and operation of which has been described above with reference to FIG.
  • the control concept described above uses, with the measurement of the mass flow or the volume flow of the tobacco, an optimal measurement, with which it is possible to keep the tobacco speed in the delivery line 22 as low as possible without, on the other hand, too little tobacco in the downstream cigarette making machine arrives.
  • the signal indicating the mass or volume flow is processed in the control unit 40 to optimize the air flow in the delivery line 22.
  • the supply of the amount of tobacco is controlled by the air throttling via the throttle valve 36 so that the tobacco velocity is as low as possible and the amount of tobacco supplied is only slightly larger than the amount of tobacco consumed by the cigarette making machine, so that a discontinuous Beschi- ckung with the longest possible loading phases results.
  • FIG. 5 shows a further embodiment of a tobacco feeding system, which, although a tobacco feeding station according to the tobacco feeding station 2 shown in FIGS. 1 and 3, the structure and operation of which has previously been described with reference to FIG. 1, and a control unit corresponding to the control unit 40 described above however, differs from the above-described embodiments by another structure of the conveyor and the buffer. Et al There is an essential difference in that the embodiment according to FIG. 5 does not work pneumatically and thus the conveyor 220 and the buffer 226 are not part of a pneumatic system.
  • the conveying device 220 in the exemplary embodiment shown there has a conveying screw 214 and a belt conveyor 222.
  • the screw conveyor 214 is arranged directly below the outlet 14 of the funnel 12 of the tobacco feeding station 2 and conveys the tobacco 6 emerging from the funnel 12 via the outlet 14 to the belt conveyor 222, which has a circulating conveyor belt.
  • the pulley 236 (right-hand side in FIG. 5) is driven by a motor 238, which is usually an electric motor.
  • the screw conveyor 214 is oriented approximately at right angles to the belt conveyor 222, as Figure 5 reveals, after which the screw conveyor 214 is perpendicular to the plane and the belt conveyor 222 is shown lying in the drawing plane. In principle, however, other orientations between the auger 214 and the belt conveyor 222 are of course conceivable.
  • the belt conveyor 222 conveys the tobacco 6 via an inlet 224 into a buffer store 226.
  • the belt conveyor 222 protrudes with its discharge-side end a little through the inlet 224 in the buffer 226.
  • the here also alternatively to be designated as a lock buffer 226 has the same extent Function as the buffer 26 previously described with reference to Figure 1, as that it forms an interface between the conveyor 220 and the actual cigarette making machine, which is also not shown in this embodiment, and either be part of the conveyor 220 or be part of the downstream cigarette making machine and in this case preferred in the range whose inlet can sit.
  • the temporary storage 226 serves for the batchwise storage of tobacco 6 in the course of a discontinuous charging with tobacco.
  • the tobacco 6 accumulates on a bottom 226a of the buffer 226, and the filling of the buffer 226 with tobacco 6 thus takes place in the vertical direction.
  • the inlet 224 is provided at the top of the buffer 226.
  • the tobacco 6 falls from the belt conveyor 222 due to the influence of gravity in the direction of the bottom 226a of the buffer 226.
  • the buffer 226 forms a container which is filled with tobacco 6 by the tobacco 6 falls due to the influence of gravity on the bottom 226a of the buffer 226 and piled up from there.
  • the buffer 226 according to Figure 5 does not extend in the horizontal direction, but is arranged substantially upright in the illustrated embodiment.
  • an elongated sensor arrangement 244 is provided, which is arranged substantially upright, but otherwise in terms of construction and function of the sensor arrangement 44, which has been shown in Figures 1 and 2 and described with reference to those figures, so that reference is made to avoid repetition.
  • the sensor assembly 244 is connected via a line 246 to the control unit 40 and transmits to this a signal indicating the current level of the chamber 228 of the buffer 226.
  • the belt conveyor 222 is driven by the motor 238, which is controlled by the control unit 40.
  • the motor 238 is connected via a line 242 to the control unit 40.
  • the control unit 40 controls the rotational speed of the motor 238, which has a direct effect on the conveying speed of the belt conveyor 222 and thus the speed of movement of the tobacco 6 in the direction of the arrow Z.
  • a high speed of the motor 238 and thus a high conveying speed of the belt conveyor 222 causes a high mass or volume flow of the tobacco 6, while a low speed of the motor 238 and thus a low conveyor speed speed of the belt conveyor 222 has a low mass or volume flow of tobacco 6 result.
  • a further sensor 344a is provided, which has an elongated shape and is arranged between the two strands of the circulating conveyor belt.
  • This further sensor 344a is designed as a weight sensor and determines the weight of the tobacco 6.
  • the sensor 344a transmits its signal to an evaluation unit 344b, which also receives a further signal via a line 348, which indicates the rotational speed of the motor 238. From the weight signal from the sensor 344a and the speed signal from the motor 238, the evaluation unit 344b determines the mass or volume flow of the tobacco 6 and transmits a corresponding signal via a line 346 to the control unit 40.
  • the sensor 344a and the evaluation 344b together form another Sensor arrangement for determining the mass or volume flow of the tobacco 6.
  • two sensor arrangements are therefore used to determine the mass or volume flow of the tobacco 6, namely the sensor arrangement 244 and the sensor arrangement 344a, 344b.
  • the sensor arrangement 244 and the sensor arrangement 344a, 344b.
  • control unit 40 For further details on the operation of the control by the control unit 40 reference is made to the description made with reference to FIG 1.
  • the buffer 226 is shown in Figure 5 without an outlet. In fact, however, there is an outlet for transferring the tobacco 6 from the buffer 226 to the cigarette making machine previously mentioned but not shown in the drawings.
  • two arithmetic wheels 250 which are arranged within the chamber 228 of the buffer 226 in the lower region, are shown by way of example in FIG.
  • the conveying screw 220 also includes the conveying screw 214.
  • the conveying screw 214 Alternatively, it is also conceivable to dispense with the conveying screw 214 and the cut tobacco from the outlet 14 of the tobacco feeding station 2 directly onto the belt conveyor 222 to drop.
  • the motor 238 is to be provided for driving such a screw conveyor.
  • the drive of the screw conveyor 214 must be controlled by the control unit 40 accordingly.
  • the control unit 40 may be self-learning. If, for example, an interruption of the tobacco flow occurs if the value falls below a certain predetermined minimum value for the mass flow or volume flow, the control unit 40 stores this value as a limit which is observed for the future regulation so that it no longer falls below it. In this way, a so-called. Stuttering is prevented. In contrast, limited tobacco stream breaks may be in the ordinary range and are dependent on the design of the entire batching plant, such as the duration and phase of the feed process. from the pipe lengths; These characteristics can be learned by the control unit and taken into account so that the control does not oscillate.

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Abstract

L'invention concerne un équipement d'amenée de tabac haché entre une unité de chargement du tabac (2) et une machine de transformation du tabac, de préférence une machine de fabrication de cigarettes, avec un dispositif de transport (20) qui peut être relié à au moins une unité de chargement du tabac (2) et à au moins une machine de transformation du tabac et qui est conçu pour transporter du tabac haché (6), avec un moyen de réglage (36) pour agir sur la vitesse de transport du tabac haché (6) dans le dispositif de transport (20), avec un dispositif capteur (44) et un dispositif de régulation (40) qui est raccordé au dispositif capteur (44) et au moyen de réglage (36) et qui est conçu pour commander le moyen de réglage (36) en fonction d'un signal fourni par le dispositif capteur (44) afin de réguler la vitesse de transport à une valeur prédéterminée. L'invention est caractérisée en ce que le dispositif capteur (44) est conçu pour mesurer le débit massique ou le débit volumique du tabac haché (6).
PCT/EP2009/007871 2008-11-07 2009-11-03 Équipement et procédé d'amenée de tabac haché entre une unité de chargement du tabac et une machine de transformation du tabac WO2010051969A1 (fr)

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CN110648345A (zh) * 2019-09-24 2020-01-03 中国烟草总公司郑州烟草研究院 一种基于光场成像的输送带上烟丝物料流量检测方法及系统
CN113086559A (zh) * 2021-04-12 2021-07-09 河南中烟工业有限责任公司 一种贮丝柜出料流量控制装置及控制方法

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EP2369949A1 (fr) 2011-10-05
DE102008056296A1 (de) 2010-05-12

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