EP0864519B1 - Dispositif pour guider une bande de façon flottante - Google Patents

Dispositif pour guider une bande de façon flottante Download PDF

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Publication number
EP0864519B1
EP0864519B1 EP98104394A EP98104394A EP0864519B1 EP 0864519 B1 EP0864519 B1 EP 0864519B1 EP 98104394 A EP98104394 A EP 98104394A EP 98104394 A EP98104394 A EP 98104394A EP 0864519 B1 EP0864519 B1 EP 0864519B1
Authority
EP
European Patent Office
Prior art keywords
web
flow
nozzle
nozzles
section
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.)
Expired - Lifetime
Application number
EP98104394A
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German (de)
English (en)
Other versions
EP0864519A1 (fr
Inventor
Carl Prof. Dr.-Ing. Kramer
Eckehard Dr.-Ing. Fiedler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kramer Carl Profdr-Ing
Original Assignee
Kramer Carl Profdr-Ing
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Publication date
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Priority claimed from DE19710142A external-priority patent/DE19710142B4/de
Application filed by Kramer Carl Profdr-Ing filed Critical Kramer Carl Profdr-Ing
Publication of EP0864519A1 publication Critical patent/EP0864519A1/fr
Application granted granted Critical
Publication of EP0864519B1 publication Critical patent/EP0864519B1/fr
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/63—Continuous furnaces for strip or wire the strip being supported by a cushion of gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • B65H2406/112—Means using fluid made only for exhausting gaseous medium producing fluidised bed for handling material along preferably rectilinear path, e.g. nozzle bed for web

Definitions

  • the invention relates to a device for floating guidance and stabilization of strips, preferably metal strips, for the purpose of heat treatment of the genus specified in the preamble of claim 1.
  • the tapes are blown with treatment gas suspended from below and possibly also from above while doing so heat treated at the same time.
  • the heat treatment can heat and hold to annealing temperature and subsequent cooling for metallurgical reasons or also for the purpose of surface treatment, e.g. B. drying one Coating the tape.
  • Such devices are usually made of individual, one behind the other Sections constructed and included, such as DE-OS 2446983 or DE 4010280 A1 shows, for each section, a flow guide with at least one fan and across Floating nozzle systems arranged above and below the belt for the belt run, with which the tape is used for the purpose of convective heat exchange blow the gas circulated by the fan and at the same time through the acting Flow forces is stabilized.
  • the device according to DE-OS 2446983 is arranged laterally by only one Fan per section achieved a particularly compact design, but there one fan that supplies both upper and lower floating nozzles is one easy adjustment of the load capacity, e.g. B. to adapt to the weight of the floating to leading band, not by changing the fan speed possible because it affects the upper and lower nozzle systems in the same way would.
  • the device according to DE-OS 2446983 has the disadvantage that that the backflow of the treatment gas inflated onto the belt only after one side towards the fan. This creates a backflow from the belt and inflow in the nozzle fins for a heat exchange in the Cross current, which z. B. in a heating zone in which the gas from the belt flows out colder than it is inflated onto the belt, a decrease in temperature of the inflated gas along the nozzle rib from that facing away from the fan Side to the fan side.
  • the device according to DE 4010280 A1 avoids this disadvantage by mutual inflow to the nozzle fins within a section, required but four fans per section and is therefore only for systems for floating Run very wide tapes where appropriate because of the larger ones to be blown Area and the higher gas volume flow required thereby this higher technical effort is worthwhile.
  • a big disadvantage of this device with side supplied nozzle fins is that complex guide vane systems for recirculation the nozzle outflow must be used perpendicular to the belt surface, which, in addition to costs, cause noticeable pressure drops.
  • DE-A 19 623 303 discloses a device for drying material webs with a housing, inside of which by means of blowers and blow nozzle boxes each After the temperature zone, hot to slightly tempered air is blown against the material web becomes.
  • the circulating air fan motors are in one chamber for preheating the fresh air arranged with inlet and outlet openings so that the fresh air this chamber flows through and absorbs the thermal energy from the cooling of the electric motors.
  • the air flow emerging from the circulating air blowers, see for example FIG. 1, immediately undergoes a 90 ° bend, which results in relatively poor efficiency results. No information is given on the outflow of the circulated air.
  • the invention is therefore based on the object of a device of the specified To create genus that avoids the disadvantages described.
  • a technically relatively inexpensive, compact device in which the bilateral adjustment of the flow to the weight of a Band or the regulation of the load capacity in a simple manner by changing the Fan speed is possible.
  • a radial fan preferably a drum rotor radial fan, is shown in each zone with axis vertical to the belt level above and below the belt the ceiling or the bottom of a section of the device.
  • the discharge cross-section of the spiral casing of the radial fan is oriented in such a way that the blowout into a channel piece of at least the length of about a hydraulic Diameter, essentially parallel to the belt run.
  • This section of duct is connected to an end wall of a section of the device a flow deflection by 180 °, i.e. against the blow-out direction of the radial fan, on.
  • a flow deflection by 180 ° i.e. against the blow-out direction of the radial fan
  • another flow channel which is also parallel to the belt run and over the extends the entire length of the section.
  • This channel forms in connection with the 180 ° deflection and the 360 ° spiral housing with subsequent exhaust duct, in viewed vertical longitudinal central section of the device, the shape of a horizontal lying U, whose two legs are parallel to the belt run.
  • the nozzle field is arranged on the tape facing side of the flow channel adjoining the 180 ° deflection.
  • This nozzle field can be from the usual, the state of Technically appropriate floating nozzles, but preferably from a floating nozzle field with nozzle surfaces, which have the shape of the axial section of a truncated cone or a barrel, the base of the truncated cone or the largest diameter of the barrel is in the middle of the floating nozzle.
  • nozzle openings are partially grouped around outflow openings. These outflow openings are formed by the inlet cross-section in channels, which the flow channel penetrate perpendicular to the band plane.
  • the Backflow from the belt to the fan partly through these flow channels, where the division of the backflow into the portion that is lateral to the belt flows back, and takes place in the proportion, which by the above, the Flow channel penetrating backflow channels the load capacity characteristic of Floating nozzle field determined.
  • the major part of the outflow takes place on both sides the device and comes out of the room to the side of the flow channel in the area between the two U-legs, towards which the suction opening the centrifugal fan is oriented.
  • heating devices are at least a side wall of the outer case installed and protrude into the space between the Legs into the U-shaped flow guide.
  • the electrical heating register is either in the range of Deflection of the U-shaped flow guide installed or on the suction side in front of the Fan arranged.
  • the cooler for the circulating gas in the area of the U-shaped deflection installed the cross section of the to increase the installation area Flow guidance - viewed from the fan - to the cooler inlet cross-section can expand. It is also the arrangement of the cooler on the suction side in front of the Fan possible.
  • the floating nozzles can be via the flow channel from which they are supplied will survive laterally.
  • the device shown in Figure 1 is used for floating guidance and stabilization from narrow to medium-wide metal bands. This means metal straps with a width between about 800 mm and 1200 mm.
  • This device has, see Figure 1, four heating zones 2 and two cooling zones 3. Volume 1 is running from right to left horizontally through the device. In the end, behind the last one Cooling zone 3, the device is through a water cup 4 through which the belt 1 is guided by means of an immersion roller. Before entering the first Heating or furnace zone are the usual roles for controlling the belt position and the Belt tension arranged.
  • the gas jet seal 12 at the inlet should a mixture of the protective gas atmosphere, which is preferably an extremely low one Avoid oxygen content with the ambient air.
  • the gas jet seal 12 at the outlet of the device advantageously prevents this Penetration of water vapor from the housing of the water cup 4 into the cooling zone 3, whereby the dew point of the protective gas atmosphere is raised disadvantageously would.
  • Each zone 2, 3 of the device has two U-shaped flow guides 50 and 5u or 6o and 6u above the belt (5o, 60) or below the belt (5u, 6u).
  • In the legs of this U facing away from volume 1 are heating or furnace fans 7 or cooling zone fans 8 installed.
  • the outlet direction 19 of the fan 7, 8 in a U-shaped flow guide 5o or 5u, 6o or 6u points against the Connection of the two legs of the U.
  • Flow arrow 21 is indicated in Figure 2, a change in the direction of flow 180 ° into the entry of a flow channel 25, which is the second U-leg represents and from which nozzle fins 11 are supplied with treatment gas.
  • each fan 7, 8 is the straight blow-out section 20 of the Length about a hydraulic diameter in the, in the illustration in figure 2 shown, upper U-leg up to the flow deflection 21 available.
  • connection points are located in two adjacent sections the leg of the U-shaped flow plate 29 on opposite one another Ends of the two sections, so that the side view is about Form of an inverted iron results.
  • the oven or heating zones 2 are in the area between the two legs of the U for the example shown in the figures indirectly gas-heated radiant tubes 9 arranged.
  • the cooling zones 3 with gas flow in a closed circuit contain one in each U in the junction between the two U-legs arranged cooler 10.
  • This cooler 10 can be used as a finned or finned tube cooler or be carried out in another usual design.
  • a heating zone 2 In cross section through a heating zone 2 ( Figure 3) are rooms 13 to the side of the U-shaped flow guide 5o and 5u can be seen. These rooms 13 are in usually through manholes, which can be screwed gas-tight; accessible and allow easy inspection and cleaning of the device and easy access for maintenance work.
  • the radial fan 7 is driven in the example shown by a belt drive.
  • the motor 15, the fan 7 on the side of the device is advantageous relocated because then only the V-belts to remove the fan 7 must be dismantled and the heavy motor 15 with its electrical connections can remain on the system.
  • an auxiliary motor 18 can also be seen, which is driven by a Emergency generator is driven and the fan 7 continues to rotate offset if, e.g. B. by a power failure, an unintentional downtime occurs. This auxiliary motor 18 then prevents the fan 7 stops and is damaged at high temperatures inside the furnace could.
  • the structure of the cooling zone 3, which is shown in cross section in Figure 4, corresponds essentially the structure of the heating zone 2.
  • the fan 8 is also by a laterally arranged motor 16 driven by a belt drive. Inspection and inspection rooms 14 result from the area between the U-shaped Flow guide 6o or 6u and the outer housing.
  • the device can be equipped with various floating nozzle systems.
  • Figure 2 shows the equipment with floating nozzle ribs 11 according to the state of the Technology. These nozzle ribs 11 are with slot nozzles or perforated nozzles or one Combined with perforated and slotted nozzles, they run across the belt run and have the same width across the entire working width. If on both sides of the band 1 floating nozzles 11 are arranged, these are expedient offset by half the pitch, as in the prior art generally known, in the case of thin, moving with little pull through the device Tapes 1 can impress a transverse wave form that stabilizes the tape run.
  • the outflow of the gas stream inflated from the nozzle ribs 11 onto the belt can take place through return flow channels 24 which are located between the nozzle ribs 11 are trained.
  • the gas flows laterally out of these return flow channels 24
  • Flow channel 25 between the nozzle surface and flow plate 29 over, which shown in Figure 2 with decreasing in the flow direction in the channel 25 height is.
  • the outflow occurs Gas flow into the suction area 22 of the radial fan 7, namely into 360 ° spiral housing.
  • Nozzle surfaces whose Width extends transversely to the tape running direction indicated by the arrow 27 in FIG changed, are lined up one behind the other in the tape running direction. These nozzle areas are framed by slot nozzles 17 in part of their circumference. The nozzle surfaces themselves are equipped with perforated nozzles.
  • the nozzle surfaces have an elongated, tapered shape when viewed from above, such as through an axial section of a truncated cone or a barrel is formed, the base of the truncated cone or the largest diameter of the barrel lies in the middle of the floating nozzle 11.
  • the slot nozzles 17 extend over the entire circumference of the nozzle surfaces except for their blunt ends, as can be seen in Figure 5.
  • the nozzle openings are expediently in groups arranged around the return flow channels penetrating the flow channel, which are preferably only present in the central region of the flow channel.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Ventilation (AREA)
  • Toys (AREA)
  • Advancing Webs (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Drying Of Solid Materials (AREA)

Claims (12)

  1. Dispositif pour guider et stabiliser des bandes (1) de façon flottante, de préférence des bandes métalliques (1), en vue du traitement thermique avec au moins une section de soufflage (2, 3)
    a) avec des buses à suspension (11) en vue d'un soufflage au moins unilatéral de la bande (1) avec un gaz de traitement et
    b) avec un ventilateur radial (7, 8) disposé sur le côté soufflage de la bande (1) avec un carter en spirale à 360° (22) pour alimenter les buses à suspension (11) avec les caractéristiques suivantes :
    c) le ventilateur radial (7, 8) est installé sur chaque côté de soufflage avec l'ouverture d'aspiration intérieure dans le sens de circulation de la bande respectivement à une extrémité longitudinale de chaque section de soufflage (2, 3) ;
    d) le ventilateur radial (7, 8) est installé de sorte qu'il souffle dans un sens (19) qui est essentiellement parallèle au sens de circulation de la bande (27) ;
    e) une partie de canal droite (20) d'environ la longueur d'un diamètre hydraulique se raccorde à la section de soufflage du ventilateur radial (7, 8) ;
    f) l'écoulement de la partie de canal droite (20) est renversé (21) à respectivement l'autre extrémité longitudinale de chaque section de soufflage (2, 3) en forme de U par rapport à la bande (1), de sorte qu'il s'opère à nouveau dans le secteur des buses à suspension (11), dans le sens opposé à l'écoulement (19) du ventilateur radial (7, 8), essentiellement parallèlement au sens de circulation de la bande (27) dans un canal d'écoulement (25) et
    g) le retour d'écoulement de la bande (1) a lieu tout d'abord parallèlement au plan de bande à chaque fois dans un espace (13, 14) latéralement à côté du guidage d'écoulement (50, 5u ; 60, 6u) et de cet espace (13, 14) dans le secteur entre l'écoulement du ventilateur radial (7, 8) et l'écoulement près des buses à suspension (11) et vers la section d'aspiration du ventilateur radial (7, 8).
  2. Dispositif selon la revendication 1 avec soufflage bilatéral, caractérisé en ce que les guidages d'écoulement (50, 5u ; 60, 6u) sont orientés des deux côtés de la bande (1) dans le même sens, qu'ils sont donc disposés en symétrie de miroir par rapport à la bande (1).
  3. Dispositif selon au moins l'une des revendications 1 ou 2, caractérisé en ce que chaque ventilateur radial (7, 8) est un ventilateur à rotor cylindrique.
  4. Dispositif selon au moins l'une des revendications 1 à 3, caractérisé en ce que les espaces (13, 14) disposés respectivement des deux côtés de la bande (1) et du guidage d'écoulement, entourés par le bâti extérieur du dispositif sont accessibles et praticables pour des travaux d'inspection et d'entretien.
  5. Dispositif selon l'une ou plusieurs des revendications 1 à 4, caractérisé en ce qu'en cas de chauffage du dispositif avec des brûleurs, des installations de chauffage (9) sont incorporées dans au moins une paroi latérale du bâti extérieur et dépassent dans l'espace entre les tronçons d'écoulement parallèles opposés ou qu'en cas de chauffage électrique le registre de tirage électrique est incorporé dans la région du renversement en forme de U.
  6. Dispositif selon au moins l'une des revendications 1 à 5, caractérisé en ce que dans des sections, qui sont réalisées en tant que zones de refroidissement (3) avec circuit d'écoulement fermé, le refroidisseur (10) pour le gaz de circulation est incorporé dans la région du renversement en forme de U, la section du guidage d'écoulement (60), (6u) s'étendant - vu du ventilateur radial (8) - pour l'agrandissement de la surface de montage vers la section d'entrée du refroidisseur.
  7. Dispositif selon au moins l'une des revendications 1 à 6, caractérisé en ce qu'au début et à la fin du dispositif composé d'au moins une section de soufflage (2, 3) des joints à jet gazeux (12) sont installés à l'ouverture d'entrée de la bande et de sortie de la bande.
  8. Dispositif selon au moins l'une des revendications 1 à 7, caractérisé en ce que pour le guidage flottant de la bande (1) des buses à suspension (11) équipées de buses à fentes (14) et / ou de buses à trous (20) sont utilisées, qui présentent une largeur inégale au-dessus de la largeur de bande, que des canaux de renversement d'écoulement (24) sont formés entre les buses à suspension (11), à travers lesquels du gaz soufflé peut s'écouler latéralement sur la bande (1) et qu'en particulier les buses à suspension (11) dépassent latéralement au-dessus du canal d'écoulement (25), à partir duquel elles sont alimentées.
  9. Dispositif selon la revendication 8, caractérisé en ce que chaque buse à suspension (11) disposée transversalement par rapport à la bande (1) présente deux fentes de buses extérieures (17) bordant sa surface de buse en forme de section axiale d'un double cône tronqué ou d'un tonneau, la base du double cône tronqué ou le plus grand diamètre du tonneau se trouvant au centre de la buse à suspension (11) et qu'en particulier les rayons (28) d'une buse à suspension (11) qui émergent des deux fentes de buses (17) sont inclinés les uns par rapport aux autres.
  10. Dispositif selon au moins l'une des revendications 8 ou 9, caractérisé en ce que des buses à trous (20) sont disposées entre les fentes de buses (17) d'une buse à suspension (11).
  11. Dispositif selon au moins l'une des revendications 1 à 10, caractérisé en ce que le canal d'écoulement (25), qui, vu en coupe médiane longitudinale verticale du dispositif, constitue le montant en U voisin de la bande (1), est muni sur son côté orienté vers la bande (1) d'une surface de buse, qui présente des canaux de retour d'écoulement (24) qui pénètrent dans la zone centrale dans le canal d'écoulement verticalement par rapport à la bande, autour desquels les ouvertures de buses se groupent.
  12. Dispositif selon au moins l'une des revendications 1 à 11, caractérisé en ce que la bande (1) à stabiliser circule inclinée par rapport à l'horizontale.
EP98104394A 1997-03-12 1998-03-11 Dispositif pour guider une bande de façon flottante Expired - Lifetime EP0864519B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19710142A DE19710142B4 (de) 1997-03-12 1997-03-12 Vorrichtung zur Wärmebehandlung schwebend geführter Bänder - Schwebeofen
DE19710142 1997-03-12

Publications (2)

Publication Number Publication Date
EP0864519A1 EP0864519A1 (fr) 1998-09-16
EP0864519B1 true EP0864519B1 (fr) 2003-06-25

Family

ID=7823075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98104394A Expired - Lifetime EP0864519B1 (fr) 1997-03-12 1998-03-11 Dispositif pour guider une bande de façon flottante

Country Status (3)

Country Link
EP (1) EP0864519B1 (fr)
AT (2) ATE207844T1 (fr)
DE (2) DE59801910D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007018453U1 (de) 2006-11-06 2008-08-14 Otto Junker Gmbh Vorrichtung zur schwebenden Führung von bahnförmigem Material
EP1699721B2 (fr) † 2003-12-10 2011-11-30 Otto Junker GmbH Dispositif de guidage flottant d'un materiau en bande

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2821285B1 (fr) 2001-02-23 2003-11-28 Saint Gobain Seva Dispositif de soufflage d'un fluide sur au moins une face d'un element mince, et unite de soufflage associe
DE10303228B3 (de) * 2003-01-28 2004-04-15 Kramer, Carl, Prof. Dr.-Ing. Vorrichtung zur Wärmebehandlung metallischer Bänder im Durchlauf
DE102010006349A1 (de) 2010-01-27 2011-07-28 WSP GmbH, 52074 Heißgasventilator
CN103397291B (zh) * 2013-08-23 2015-04-29 武汉科技大学 阻碍镀锌带钢保温段热气流上升的装置及其使用方法
CN108787906A (zh) * 2018-08-16 2018-11-13 艾伯纳工业炉(太仓)有限公司 一种辊底式铝合金热成型炉
CN113335979A (zh) * 2021-06-17 2021-09-03 深圳吉阳智能科技有限公司 一种气流悬浮装置以及锂电池生产设备
CN116067158B (zh) * 2023-02-07 2023-07-04 无锡爱德旺斯科技有限公司 一种气浮烘箱

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE543931A (fr) *
DE976048C (de) * 1953-09-04 1963-01-31 Krantz Soehne H Duesentrockner fuer bahnfoermiges Gut, insbesondere fuer Gewebebahnen
DE2446983C2 (de) * 1974-10-02 1985-09-19 Kramer, Carl, Prof. Dr.-Ing., 5100 Aachen Vorrichtung zur beidseitigen Beblasung eines bahnförmigen Materials
DE19623303B4 (de) * 1996-06-11 2005-08-11 Deppe, Oliver, Dipl.-Ing. Vorrichtung zum Trocknen von Materialbahnen mit Frischluftvorwärung, wahlweise mit kompakten Umluftgebläsen und Leitdüsenstationen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1699721B2 (fr) † 2003-12-10 2011-11-30 Otto Junker GmbH Dispositif de guidage flottant d'un materiau en bande
DE202007018453U1 (de) 2006-11-06 2008-08-14 Otto Junker Gmbh Vorrichtung zur schwebenden Führung von bahnförmigem Material

Also Published As

Publication number Publication date
DE59801910D1 (de) 2001-12-06
DE59808779D1 (de) 2003-07-31
ATE243648T1 (de) 2003-07-15
EP0864519A1 (fr) 1998-09-16
ATE207844T1 (de) 2001-11-15

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