Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F26—DRYING
  • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
  • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
  • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
  • F26B13/101—Supporting materials without tension, e.g. on or between foraminous belts
  • F26B13/104—Supporting materials without tension, e.g. on or between foraminous belts supported by fluid jets only; Fluid blowing arrangements for flotation dryers, e.g. coanda nozzles
• • 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

Definitions

• the invention relates to a device for the floating guidance of sheet-like material, in particular metal strips, by means of a gas with at least one unit, in each of which a floating nozzle field with nozzle ribs from which the gas flows onto the sheet-like material is arranged on both surfaces of the sheet-like material , and each floating nozzle field is supplied with gas by a radial fan assigned to it, which is arranged laterally offset in a spiral housing with respect to the web-shaped material with respect to the respective floating nozzle field, via a flow channel system, with both radial fans in the unit on the in relation to the web-shaped material are arranged on the same side.
• Each radial fan blows out into a flow channel running parallel to the transport direction of the metal strip, which after two deflections at the respective front end of the device merges into a parallel channel section with the opposite direction of flow. After a further deflection, the blowing gas flows from this channel section into the nozzle ribs of the respective floating nozzle field on the rear side thereof.
• the heating tube that is effective for heat transfer, for example by the heating tube additionally having a heating loop at its end protruding into the device, that is to say, in a plan view, for example in the form of a P-shape is.
• a multi-stage guidance or treatment of the web material can be achieved in that the device according to the invention consists of several units arranged one behind the other in the transport direction of the web material. If heat treatment of the web-like material is provided in such a system, at least one of the units is equipped with at least one heating element, which can be designed in the manner described above, for example as a heating tube. If the web-like material is to be cooled again after heating, it can accordingly be provided that the unit following the heating unit is equipped with cooling elements for controlled cooling of the web-like material.
• the invention is explained in more detail below with reference to a drawing which represents only one exemplary embodiment. Show it:.
• FIG. 1 shows a device for the horizontal floating guidance and heat treatment of metal strips by means of a gas in a schematic lateral section
• FIG. 4 shows the device from FIG. 1 in plan view according to arrow IV from FIG. 3.
• the device for floating guidance and heat treatment of metal strip shown in FIG. 1 comprises a cuboid housing 1 with an inlet slot 1 a and an outlet slot 1 b, through which the metal strip B to be treated is introduced into the device or out of it.
• the metal strip B is acted upon by gas from an upper and a lower nozzle field 2, 3 and is thus guided in a floating manner.
• the nozzle fields 2, 3 each comprise a number of nozzle ribs 2a, 3a, from which the gas flows onto the belt B, and each have two outflow channels 2b, 3b arranged between two nozzle ribs 2a, 3a, via which the to the Strip surfaces of the reflected gas streams flow back into a suction chamber 4.
• the cuboid suction chamber 4 is arranged behind the floating nozzle fields in the view in FIG. 1 and extends over the entire length of the device.
• the metal strip B guided by the device is heat-treated at the same time.
• three heating elements 7, 8 are arranged above or below the floating shower fields 2, 3, which heat the gas streams before entering the nozzle ribs, as will be described in more detail below.
• the spiral housings 5a, 6a are shaped such that the gas flows emerging from them expand to the entire length of the floating shower fields 2, 3.
• Such a divergent gas flow enables a particularly uniform distribution of the gas to the individual nozzle ribs, so that consequently the nozzle ribs 2a, 3a arranged at the ends of the floating shower fields 2, 3 are supplied with the same volume flow as that at the level of the radial fans 5, 6.
• a curved flow guide plate 5b, 6b is also provided within the spiral housing 5a, 6a, which essentially halves the gas flow generated by the respective radial fan 5, 6 and shown by arrows in FIG. 3. This also contributes to an equalization of the gas flows.
• the relatively voluminous spiral housings 5a, 6a can nevertheless be arranged in a space-saving manner with respect to the length and height of the device on one longitudinal wall thereof.
• they are preferably point-symmetrical with respect to the center of the connecting line of the
• the spiral housings 5a, 6a are part of two U-shaped flow channel systems S1, S2, via which the gas flows generated by the radial fans 5, 6 into the nozzle ribs 2a, 3a of the floating nozzle fields 2 , 3 arrive.
• the gas streams first emerge from the spiral housings 5a, 6a in a plane perpendicular to the surface of the web-shaped material and then flow through double deflection by approximately 90 ° into the nozzle ribs 2a, 3a of the floating shower fields 2, 3 their respective rear side.
• the U-shaped flow channel systems S1, S2 are delimited on the outside by the housing wall 1 and on the inside by the wall of the suction space 4.
• the gas flows flow horizontally and transversely to the direction of transport of the metal strip B, flowing around the heating elements 7, 8 arranged both above and below the floating shower fields 2, 3.
• the heating elements 7, 8 are preferably designed as heating tubes heated from the inside by combustion gases, which extend transversely to the direction of transport of the belt B and parallel to its surface. Furthermore, the heating elements 7, 8 each have a heating loop at their ends projecting into the device in order to increase their effective surface area, so that, as shown in FIG.
• the gas streams heated by the heating elements 7, 8 flow into the nozzle ribs 2a, 3a of the floating shower fields 2, 3 via their respective rear sides and finally onto the strip surface via nozzles (not shown) provided in the nozzle ribs 2a, 3a. There, the gas flows are reflected into the outflow channels 2b, 3b, from where they enter the openings 4b in the side wall of the suction space 4b. The gas collected in the suction space is in turn sucked in by the radial fans 5, 6 via the intake ports 4a and accelerated again.
• the device shown in Figures 1 to 4 consists of one unit.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Heat Treatment Of Strip Materials And Filament Materials (AREA)
• Furnace Details (AREA)
• Train Traffic Observation, Control, And Security (AREA)
• Advancing Webs (AREA)
• Coating With Molten Metal (AREA)

Applications Claiming Priority (2)

Publications (3)

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Family Applications (1)

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• 2003
  • 2003-12-10 DE DE10358142A patent/DE10358142A1/de not_active Ceased
• 2004
  • 2004-11-18 WO PCT/EP2004/013091 patent/WO2005056448A1/fr active IP Right Grant
  • 2004-11-18 AT AT04797984T patent/ATE384020T1/de not_active IP Right Cessation
  • 2004-11-18 DE DE502004005996T patent/DE502004005996D1/de active Active
  • 2004-11-18 EP EP04797984A patent/EP1699721B2/fr not_active Not-in-force

Non-Patent Citations (1)

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