EP2806757B1 - Pneumatic conveying installation - Google Patents
Pneumatic conveying installation Download PDFInfo
- Publication number
- EP2806757B1 EP2806757B1 EP14713380.5A EP14713380A EP2806757B1 EP 2806757 B1 EP2806757 B1 EP 2806757B1 EP 14713380 A EP14713380 A EP 14713380A EP 2806757 B1 EP2806757 B1 EP 2806757B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- conveying
- throttle
- conveyed
- regulating
- lines
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
- 238000009434 installation Methods 0.000 title claims 6
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 241000208125 Nicotiana Species 0.000 claims description 7
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
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
- A24C5/392—Tobacco feeding devices feeding pneumatically
Definitions
- the invention relates to a pneumatic conveying system according to the preamble of claim 1 and a method for operating a pneumatic conveying system according to the preamble of claim 4.
- Such conveyors are primarily used to promote cut tobacco.
- the promotion is usually carried out as suction through lines with downstream compressor, in particular fan, which generates a pressure difference in the pipe system.
- another conveyor can be used in the pressure or suction operation. Due to the pressure difference between the material entry into the delivery line and the introduced into the delivery line separator for separating the conveying air from the conveyed material, the air and thus the conveyed material is moved in the line system. At the separator, the conveyed material is separated from the air flow.
- the compressor will generate the vacuum for a plurality of delivery lines formed as communicating tubes.
- the individual delivery pipelines are equipped with an individual control system, as for example DE 10 2006 011 742 B1 is known.
- control units The task of these control units is to comply with specified target flow rates, taking into account the ever-changing parameters such as pipe length, type of recording of the conveyed material in the conveyor system and product properties of the transported material.
- the control units generate by means of a throttle device an air resistance, which leads to a reduction in the promotion responsible pressure gradient between material entry point in the delivery pipe and the separator leads.
- the degree of throttling By the degree of throttling, the desired conveying speed of the conveying air and thus of the conveyed material is achieved.
- the conveyor i.
- the fan is operated at a power that is chosen so large that the pressure difference in the piping system always remains so large that regardless of the positions of the respective throttle a certain minimum conveying speed is maintained.
- the conveyor regularly generates a negative pressure in the conveyor system, since it is usually downstream of the separator.
- the conveyor usually generates a significantly higher vacuum than is actually required by the conveyor system.
- the electrical energy consumption of the conveyor is thereby higher than necessary.
- Object of the present invention is therefore to provide a pneumatic conveyor system and a method for operating a pneumatic conveyor system, with which the energy consumption of the conveyor during operation is significantly reduced.
- the invention makes use of the fact that the information on the current degree of throttling is available at each control unit.
- the pressure generation of the conveyor which may be a suction conveyor or a pressure conveyor can be varied according to the invention, whereby an influence on the energy consumption of the system is possible.
- R min minimum throttle degrees
- a control and regulating device is now provided which is capable of varying the power of the conveyor in a form such that at least one of the control units operates in the range of R min .
- Rmin means that the throttle in question is regulated so that it does not open as much as possible.
- the regulation according to the invention ensures that the conveying device always picks up only the required energy.
- a plurality of delivery lines 10, 11, 12 are provided, which are each loaded in a task area 1 with the conveyed.
- separating devices 2 are integrated, which separate the conveyed, in particular cut tobacco, from the conveying air.
- a common compressor (generally conveying device) 4 is connected downstream of the delivery lines 10, 11, 12.
- the plant shown is designed as a suction conveyor, but also a separation device 2 upstream pressure conveyor would work according to the invention.
- each a control unit 31, 32, 33 Downstream of the separation devices 2 are each a control unit 31, 32, 33, which regulate a throttle device (not shown in detail) with throttle.
- a throttle device not shown in detail
- information about the open position of the respective throttle valves that is to say the respective degree of throttling, are consequently available and can be read out.
- This information can be transmitted to a control and regulation device 5 via associated interfaces, which are shown here as signal lines 315, 325, 335, but can also operate wirelessly.
- the control unit 5 compares the degrees of throttling of the individual control units 31, 32, 33 with the (possibly in each case) predetermined minimum throttling degrees R min .
- the power consumption of the conveyor device 4 is changed until the current degree of throttling (at least) of a throttle device is in the range R min .
- the degree of throttling is adjusted by varying the power consumption of the conveyor 4 by means of the control and regulating unit 5 so that the degree of throttling of the relevant control unit 31, 32, 33 settles to R min .
Landscapes
- Air Transport Of Granular Materials (AREA)
- Manufacturing Of Cigar And Cigarette Tobacco (AREA)
Description
Die Erfindung betrifft eine pneumatische Förderanlage nach dem Oberbegriff des Anspruchs 1 und ein Verfahren zum Betreiben einer pneumatischen Förderanlage nach dem Oberbegriff des Anspruchs 4.The invention relates to a pneumatic conveying system according to the preamble of claim 1 and a method for operating a pneumatic conveying system according to the preamble of claim 4.
Solche Förderanlagen dienen in erster Linie dazu, Schnitttabak zu fördern. Die Förderung erfolgt in der Regel als Saugförderung durch Leitungen mit nachgeschaltetem Verdichter, insbesondere Ventilator, der in dem Rohrsystem einen Druckunterschied erzeugt. Allgemein kann auch eine andere Fördereinrichtung im Druck- oder Saugbetrieb eingesetzt werden. Durch den Druckunterschied zwischen dem Materialeintrag in die Förderleitung und dem in die Förderleitung eingebrachten Abscheider zum Trennen der Förderluft vom Fördergut, wird die Luft und damit das Fördergut in dem Leitungssystem bewegt. Am Abscheider wird das Fördergut vom Luftstrom separiert. In der Regel wird der Verdichter den Unterdruck für mehrere Förderleitungen, die als kommunizierende Röhren ausgebildet sind, erzeugen. Die einzelnen Förderrohrleitungen sind dabei mit einem individuellen Regelsystem ausgerüstet, wie dies z.B. aus
Die Aufgabe dieser Regeleinheiten ist, unter Beachtung der sich stets ändernden Parameter wie Rohrleitungslänge, Art der Aufnahme des Fördergutes in die Förderanlage und Produkteigenschaften des Fördergutes spezifisch vorgegebene Soll-Fördergeschwindigkeiten einzuhalten. Die Regeleinheiten erzeugen mittels einer Drosseleinrichtung einen Luftwiderstand, der zu einer Reduzierung des für die Förderung verantwortlichen Druckgefälles zwischen Materialeintragsstelle in das Förderrohr und dem Abscheider führt. Durch den Grad der Drosselung wird die gewünschte Fördergeschwindigkeit der Förderluft und damit des Fördergutes erreicht.The task of these control units is to comply with specified target flow rates, taking into account the ever-changing parameters such as pipe length, type of recording of the conveyed material in the conveyor system and product properties of the transported material. The control units generate by means of a throttle device an air resistance, which leads to a reduction in the promotion responsible pressure gradient between material entry point in the delivery pipe and the separator leads. By the degree of throttling, the desired conveying speed of the conveying air and thus of the conveyed material is achieved.
Die Fördereinrichtung, d.h. insbesondere der Ventilator, wird dabei mit einer Leistung betrieben, die so groß gewählt ist, dass der Druckunterschied im Rohrleitungssystem immer so groß bleibt, dass unabhängig von den Stellungen der jeweiligen Drosselklappen eine gewisse Mindestfördergeschwindigkeit aufrechterhalten wird. In der Praxis erzeugt die Fördereinrichtung regelmäßig einen Unterdruck im Fördersystem, da sie normalerweise dem Abscheider nachgeschaltet ist.The conveyor, i. In particular, the fan is operated at a power that is chosen so large that the pressure difference in the piping system always remains so large that regardless of the positions of the respective throttle a certain minimum conveying speed is maintained. In practice, the conveyor regularly generates a negative pressure in the conveyor system, since it is usually downstream of the separator.
In der Praxis erzeugt die Fördereinrichtung in der Regel einen deutlich höheren Unterdruck als vom Fördersystem tatsächlich benötigt wird. Die elektrische Energieaufnahme der Fördereinrichtung ist dadurch höher als erforderlich.In practice, the conveyor usually generates a significantly higher vacuum than is actually required by the conveyor system. The electrical energy consumption of the conveyor is thereby higher than necessary.
Dies beruht bei vielen Systemen darauf, dass die Fördereinrichtungen schlichtweg mit konstanter Leistung ungeregelt betrieben werden. Die überschüssige Energie wird dabei regelmäßig durch Regelklappen, die dem Tabakabscheider nachgeschaltet werden, vernichtet. Es existieren zwar Förderanlagen mit Fördereinrichtungen, deren Leistung einstellbar oder regelbar ist, jedoch muss auch bei diesen Anlagen der Sollwert der Regelung der Fördereinrichtung bzw. der Einstellwert der Fördereinrichtung derart hoch gewählt sein, dass über den gesamten Regelungsbereich der geregelten Drosselungen der einzelnen Förderleitungen sichergestellt ist, dass nirgendwo im System die geforderte Tabakmindestgeschwindigkeit unterschritten werden kann. Dies bedeutet, dass auch bei einer geregelten Fördereinrichtung diese immer einen Unterdruck erzeugen muss, der so groß ist, dass alle zur Regelung der Fördergeschwindigkeit eingesetzten Drosseleinrichtungen über ihren gesamten Einstellbereich unabhängig voneinander und gleichzeitig arbeiten können, ohne dass an irgendeiner Stelle der Förderanlage die geforderte Mindestfördergeschwindigkeit unterschritten wird.This is due to many systems that the conveyors are simply operated unregulated with constant power. The excess energy is regularly destroyed by control valves, which are connected downstream of the tobacco separator. Although there are conveyors with conveyors whose performance is adjustable or regulated, but must be selected so high in these systems, the target value of the control of the conveyor or the set value of the conveyor that is ensured over the entire control range of controlled throttling of the individual delivery lines that nowhere in the system the required minimum tobacco speed can be fallen below. This means that even with a controlled conveyor this must always generate a negative pressure that is so great that all throttling devices used to control the conveying speed can operate independently and simultaneously over their entire adjustment without the required minimum conveying speed at any point of the conveyor is fallen short of.
Aufgabe der vorliegenden Erfindung ist es daher, eine pneumatische Förderanlage und ein Verfahren zum Betreiben einer pneumatischen Förderanlage anzugeben, mit denen die Energieaufnahme der Fördereinrichtung im Betrieb deutlich reduziert wird.Object of the present invention is therefore to provide a pneumatic conveyor system and a method for operating a pneumatic conveyor system, with which the energy consumption of the conveyor during operation is significantly reduced.
Gelöst wird diese Aufgabe durch eine pneumatische Förderanlage mit den Merkmalen des Anspruchs 1 sowie ein Verfahren zum Betreiben einer pneumatischen Förderanlage mit den Merkmalen des Anspruchs 4. Vorteilhafte Ausführungsformen finden sich in den Unteransprüchen.This object is achieved by a pneumatic conveying system with the features of claim 1 and a method for operating a pneumatic conveying system with the features of claim 4. Advantageous embodiments can be found in the subclaims.
Die Erfindung macht sich zu Nutze, dass die Informationen über den aktuellen Drosselgrad an jeder Regeleinheit verfügbar sind. Die Druckerzeugung der Fördereinrichtung, bei der es sich um eine Saugfördereinrichtung oder auch eine Druckfördereinrichtung handeln kann, kann erfindungsgemäß variiert werden, wodurch ein Einfluss auf die Energieaufnahme des Systems möglich wird.The invention makes use of the fact that the information on the current degree of throttling is available at each control unit. The pressure generation of the conveyor, which may be a suction conveyor or a pressure conveyor can be varied according to the invention, whereby an influence on the energy consumption of the system is possible.
Für die Regeleinheiten sind minimale Drosselgrade (Rmin) definiert, die im Betrieb nicht unterschritten werden sollen, damit die Geschwindigkeit in den einzelnen Leitungen nach oben beschränkt ist. Es entspricht Rmin der maximal zulässigen Öffnungsstellung der Drosselklappe einer zugehörigen Drosselvorrichtung.For the control units minimum throttle degrees (R min ) are defined, which should not be underrun during operation, so that the speed in the individual lines is limited to the top. It corresponds to R min of the maximum permissible opening position of the throttle valve of an associated throttle device.
Erfindungsgemäß ist nun eine Steuer- und Regeleinrichtung vorgesehen, die in der Lage ist, die Leistung der Fördereinrichtung in einer Form zu variieren, so dass mindestens eine der Regeleinheiten im Bereich von Rmin arbeitet. Im Bereich von Rmin bedeutet, dass die betreffende Drosselklappe so geregelt wird, dass sie möglichst nicht stärker öffnet.According to the invention, a control and regulating device is now provided which is capable of varying the power of the conveyor in a form such that at least one of the control units operates in the range of R min . In the range of Rmin means that the throttle in question is regulated so that it does not open as much as possible.
Durch die erfindungsgemäße Regelung wird sichergestellt, dass die Fördervorrichtung immer nur die benötigte Energie aufnimmt.The regulation according to the invention ensures that the conveying device always picks up only the required energy.
Dies kann zum Beispiel derart umgesetzt werden, dass die aktuellen Betriebszustände, insbesondere die Ist-Werte der Drosselgrade, der Regeleinheiten etwa mittels eines Bussystems an eine zentrale Steuer- und Regeleinrichtung übermittelt werden. Es erfolgt dort die Evaluierung der gemeldeten Daten und Ermittlung des Sollwertes für die Fördereinrichtung. Im Falle eines Ventilators als Fördereinrichtung kann mittels eines Frequenzumrichters der Elektromotor, der den Ventilator antreibt, in der Drehzahl angepasst werden.This can be implemented, for example, in such a way that the current operating states, in particular the actual values of the throttle degrees, of the control units are transmitted to a central control and regulation device, for example, by means of a bus system. It is there the evaluation of the reported data and determination of the setpoint for the conveyor. In the case of a fan as a conveyor means of a frequency converter, the electric motor that drives the fan can be adjusted in speed.
Die Erfindung wird anhand der Figur nachfolgend näher erläutert.The invention will be explained in more detail with reference to the figure.
Dort sind in einem Blockschaltbild die wesentlichen Komponenten der erfindungsgemäßen pneumatischen Förderanlage, insbesondere Schnitttabakförderanlage, dargestellt.There, in a block diagram, the essential components of the pneumatic conveyor system according to the invention, in particular Schnitttabakförderanlage shown.
Es sind eine Mehrzahl Förderleitungen 10, 11, 12 vorgesehen, die jeweils in einem Aufgabebereich 1 mit dem Fördergut beschickt werden. In den Förderleitungen 10, 11, 12 sind Trennvorrichtungen 2 integriert, die das Fördergut, insbesondere Schnitttabak, von der Förderluft trennen. Zum Erzeugen des Druckgefälles ist den Förderleitungen 10, 11, 12 ein gemeinsamer Verdichter (allgemein Fördereinrichtung) 4 nachgeschaltet. Die gezeigte Anlage ist als Saugförderanlage ausgestaltet, aber auch eine den Trenneinrichtungen 2 vorgeschalteter Druckförderer würde erfindungsgemäß arbeiten können.There are a plurality of
Den Trennvorrichtungen 2 nachgeschaltet sind jeweils eine Regeleinheit 31, 32, 33, die eine (nicht näher gezeigte) Drosselvorrichtung mit Drosselklappe regeln. In den Regeleinheiten 31, 32, 33 sind folglich Informationen über die Öffnungsstellung der jeweiligen Drosselklappen, also der jeweilige Drosselungsgrad, verfügbar und auslesbar. Diese Informationen können über zugehörige Schnittstellen, die hier als Signalleitungen 315, 325, 335 dargestellt sind, aber auch drahtlos funktionieren können, an eine Steuer- und Regeleinrichtung 5 übermittelt werden. Die Steuer- und Regeleinheit 5 vergleicht die Drosselungsgrade der einzelnen Regeleinheiten 31, 32, 33 mit den (ggf. jeweils) vorgegebenen minimalen Drosselungsgraden Rmin. Nun wird die Leistungsaufnahme der Fördervorrichtung 4 verändert, bis der momentane Drosselungsgrad (wenigstens) einer Drosselvorrichtung im Bereich Rmin liegt. Im Bereich bedeutet, dass der Drosselungsgrad durch Variieren der Leistungsaufnahme der Fördereinrichtung 4 mittels der Steuer- und Regeleinheit 5 so eingeregelt wird, dass der Drosselungsgrad der betreffenden Regeleinheit 31, 32, 33 sich um Rmin einpendelt.Downstream of the separation devices 2 are each a
Claims (5)
- Pneumatic conveying installation, in particular cut tobacco conveying installation, to convey a material, in particular cut tobacco, in a gas flow, having a plurality of conveying lines (10, 11, 12) loaded with material to be conveyed in the gas flow, in particular air flow, and in particular at least one separating device (2) for each of the conveying lines (10, 11, 12), wherein the separating device (2) is integrated into each of the conveying lines (10, 11, 12) and is designed so that the material to be conveyed is separated and the residual gas flow substantially separated from the material to be conveyed is forwarded in the conveying line, wherein a regulating unit (31, 32, 33) is arranged downstream of each separating device (2) in the conveying line, the regulating unit (31, 32, 33) having a throttle device, and regulating so that by setting a throttle level above or equal to a predefined minimum value (Rmin) a predefined conveying speed is set in the respective conveying line (10, 11, 12), wherein the conveying installation has a shared conveying means (4) to convey the material to be conveyed through the conveying lines (10, 11, 12),
characterised in that
the conveying installation has a control and regulating means (5) communicating with the conveying means (4) and being designed to detect the momentary throttle levels of the throttle devices and to vary the conveying power of the conveying means (4), wherein the control and regulating means (5) is further designed to vary the conveying power of the conveying means (4) so that the throttle level of at least one throttle device is in the region of the minimum throttle level (Rmin). - Device according to claim 1,
characterised in that
the control and regulating means (5) is connected to the regulating units (31, 32, 33) to read the operating states, in particular the actual values of the throttle levels, of the regulating units. - Device according to claim 1 or 2,
characterised in that
the conveying means has a compressor arranged downstream of the regulating units (31, 32, 33). - Device according to claim 1 or 2,
characterised in that
the conveying means (4) is a pressure conveyer. - Method for operating a pneumatic conveying installation, in particular according to one of the preceding claims, wherein a material to be conveyed, in particular cut tobacco, is conveyed in a gas flow, in particular air, via a shared conveying means (4) in conveying lines (10, 11, 12) and the material conveyed is separated in separating devices (2) and the residual gas flow is further conveyed, wherein the conveying speed is regulated b y setting a throttle level of throttle devices provided in the conveying lines (10, 11, 12) above or equal to a predefined minimum value (Rmin),
characterised in that
the momentary throttle levels of the throttle devices are constantly detected and the conveying power of the conveying device (4) is regulated so that the throttle level of at least one of the throttle devices is in the region of the predefined minimum value (Rmin).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013004634.3A DE102013004634A1 (en) | 2013-03-15 | 2013-03-15 | Pneumatic conveyor system |
PCT/EP2014/000688 WO2014139683A1 (en) | 2013-03-15 | 2014-03-14 | Pneumatic conveying installation |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2806757A1 EP2806757A1 (en) | 2014-12-03 |
EP2806757B1 true EP2806757B1 (en) | 2015-10-07 |
Family
ID=50390039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14713380.5A Active EP2806757B1 (en) | 2013-03-15 | 2014-03-14 | Pneumatic conveying installation |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2806757B1 (en) |
CN (1) | CN105007766B (en) |
DE (1) | DE102013004634A1 (en) |
WO (1) | WO2014139683A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108451009B (en) * | 2018-04-19 | 2023-11-24 | 江苏高创风电设备有限公司 | Wire feeding wind speed shifting level adjusting system |
CN108438911B (en) * | 2018-04-19 | 2023-11-21 | 江苏高创风电设备有限公司 | Air supplementing pressure channeling level adjusting system |
DE102021118548A1 (en) | 2021-07-19 | 2023-01-19 | CiTEX Holding GmbH | Suction conveying device and method for suction conveying of bulk material |
CN115381133B (en) * | 2022-08-30 | 2023-07-18 | 湖南核三力技术工程有限公司 | Continuous stable uniform-speed wind power wire feeding method and system for multiple wire collecting boxes |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3860031A (en) * | 1966-09-19 | 1975-01-14 | Amf Inc | Pneumatic tobacco feed system |
DE3712046C2 (en) * | 1987-04-09 | 1998-09-17 | Hauni Werke Koerber & Co Kg | Feeding device for extruders of the tobacco processing industry |
CN2568001Y (en) * | 2002-08-27 | 2003-08-27 | 常州市智思机械制造有限公司 | Wind speed stabilizer of pneuamtic wire feeder |
DE10332869B4 (en) * | 2003-07-19 | 2006-03-30 | Riedel Filtertechnik Gmbh | Method for operating a suction conveyor and suction conveyor |
DE10352119A1 (en) * | 2003-11-04 | 2005-06-09 | Focke & Co.(Gmbh & Co. Kg) | Method and device for sifting tobacco |
DE102006011742B3 (en) | 2006-03-13 | 2007-08-16 | Roether, Friedemann, Dr.-Ing. | Regulating transport quantity of pneumatically transported light material, especially tobacco or tea, involves varying suction pipe cross-section with control flap by demand/actual value equalization of absolute speed of light material |
CN201061255Y (en) * | 2007-07-13 | 2008-05-21 | 江苏智思机械集团有限公司 | Wind velocity regulation stabilizing device for wind power thread-feeding system |
DE102008056296A1 (en) * | 2008-11-07 | 2010-05-12 | Hauni Maschinenbau Ag | Apparatus and method for feeding cut tobacco from a tobacco feeding unit to a tobacco processing machine |
DE102010054098A1 (en) * | 2010-12-10 | 2012-06-14 | Riedel Filtertechnik Gmbh | Control arrangement for a cigarette manufacturing machine and method for regulating the transport of the cigarette filler |
CN202077564U (en) * | 2011-05-11 | 2011-12-21 | 王烽 | Pneumatic conveying system for cut tobaccos |
CN202104214U (en) * | 2011-06-17 | 2012-01-11 | 陈裕文 | Closed-loop frequency-variable control device for shred supply part high-pressure ventilation fan of cigarette rolling and tipping unit |
-
2013
- 2013-03-15 DE DE102013004634.3A patent/DE102013004634A1/en not_active Withdrawn
-
2014
- 2014-03-14 EP EP14713380.5A patent/EP2806757B1/en active Active
- 2014-03-14 WO PCT/EP2014/000688 patent/WO2014139683A1/en active Application Filing
- 2014-03-14 CN CN201480013482.2A patent/CN105007766B/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE102013004634A1 (en) | 2014-09-18 |
EP2806757A1 (en) | 2014-12-03 |
CN105007766A (en) | 2015-10-28 |
WO2014139683A1 (en) | 2014-09-18 |
CN105007766B (en) | 2017-10-31 |
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