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
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
  • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
  • F23C3/002—Combustion apparatus characterised by the shape of the combustion chamber the chamber having an elongated tubular form, e.g. for a radiant tube
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
  • F23D14/12—Radiant burners
  • F23D14/126—Radiant burners cooperating with refractory wall surfaces
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23D—BURNERS
  • F23D91/00—Burners specially adapted for specific applications, not otherwise provided for
  • F23D91/02—Burners specially adapted for specific applications, not otherwise provided for for use in particular heating operations
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
  • F23M9/00—Baffles or deflectors for air or combustion products; Flame shields
  • F23M9/003—Baffles or deflectors for air or combustion products; Flame shields in flue gas ducts
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
  • F23M9/00—Baffles or deflectors for air or combustion products; Flame shields
  • F23M9/08—Helical or twisted baffles or deflectors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F27—FURNACES; KILNS; OVENS; RETORTS
  • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
  • F27D99/00—Subject matter not provided for in other groups of this subclass
  • F27D99/0001—Heating elements or systems
  • F27D99/0033—Heating elements or systems using burners
  • F27D99/0035—Heating indirectly through a radiant surface
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
  • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
  • F23C2900/03009—Elongated tube-shaped combustion chambers

Definitions

• the invention relates to a device for heat treatment of metal strip with at least one jet pipe unit, the three in a common, parallel to the sheet metal axial plane lying tubes, namely connectable to a burner center tube and two connected at both ends to the central tube via pipe bends outer tubes , And with a with the two pipe bends between the central tube on the one hand and the two outer tubes on the other hand connected to the bearing journal on the opposite side of the burner tube unit.
• the bearing of the radiant tube unit is to be designed in such a way that the thermal expansions of the tubes in the axial direction are taken into account.
• the central tube between the burner and the outer tubes is held axially in a pivot bearing, while at the opposite end of the jet tube unit, a usually hollow bearing pin, which is welded to the two connecting the ends of the central tube to the ends of the outer tubes pipe bends, axially displaceable in supported by a support.
• the invention is therefore based on the object, a device of the type described for the heat treatment of metal bands in such a way that the thermal expansion in the region of the central tube connecting the outer tubes pipe bends can be considered when connecting the journal to these elbows.
• the invention solves this problem by the fact that the bearing pin is arranged on a gusset bridging bridge between the two pipe bends with two sides on both sides of the axis of the central tube extending, inclined at an acute angle to the axis of the central tube sections.
• the bridge By the bridge bridging the gusset area between the two pipe bends an advantageous condition for the absorption of thermal expansion in the area of the pipe bends is created, so that the connection between see the journals and the bridge can be kept largely tension-free.
• the bridge prevents direct heat transfer from the pipe bends to the bearing journals, which reduces the heat load on the bearing journal.
• the bridge has two sides of the axis of the central tube extending, under a pointed winding to the axis of the central tube inclined sections, so that by an angle change of each other at a staggered angle sections the bridge due to bending stresses occurring in the elastic region a sufficient length compensation at a thermal expansion of the pipe bends is possible.
• FIG. 1 shows a device according to the invention for the heat treatment of metal strips in sections in the area of the jet tube unit in a simplified side view
• the apparatus for heat treatment of metal strips at least one nozzle unit 1, which a Middle tube 2 and two with the central tube 2 lying in a common axial plane, parallel outer tubes 3 comprises.
• the outer tubes 3 are fluidly connected to the central tube 2 in each case via end pipe bends 4.
• the hot exhaust gases flowing into the central pipe 2 from a burner connected to an extension 5 of the center pipe 2 are thus partially recirculated via the two outer pipes 3.
• a dash-dotted lines indicated sheet metal strip 6 is heated, which is guided parallel to the common axial plane of the tubes 2, 3, in a feed direction 7, which extends transversely to the tube axes.
• the jet pipe unit 1 is mounted on both sides of the tubes 2 and 3, so that there is a largely uniform distribution of the weight load on the two supports. While the extension 5 of the central tube 2 receiving, not shown for reasons of clarity bearing 8 axially sets the jet pipe unit 1, supports the opposite support 8, the jet pipe unit 1 axially slidably from.
• the jet pipe unit 1 carries at the opposite end of the extension 5 of the central tube 2 a usually tubular bearing pin 9 which is axially displaceably supported in a corresponding receptacle of the support 8. Due to the high exhaust gas temperatures within the tubes 2, 3, these tubes are subjected to a corresponding thermal expansion, whereby the thereby necessary axial length compensation is ensured via the bearing pin 8 displaceable in the bearing 8.
• the bearing pin 9 is not attached directly to the pipe bends 4, but arranged on a bridge 10, which bridges the gusset region 11 between the two pipe bends 4. Thermal expansion of the pipe bends 4 can thus be compensated via this bridge.
• the bridge 10 is formed for this purpose by two portions 12 which extend at an acute angle to the axis of the central tube 2 and together form an obtuse angle.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Materials Engineering (AREA)
• Thermal Sciences (AREA)
• Crystallography & Structural Chemistry (AREA)
• Physics & Mathematics (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Heat Treatment Of Articles (AREA)
• Combustion Of Fluid Fuel (AREA)
• Heat Treatment Of Strip Materials And Filament Materials (AREA)
• Air Supply (AREA)
• Tunnel Furnaces (AREA)
• Feeding And Controlling Fuel (AREA)

Priority Applications (8)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43302228

Family Applications (1)

Country Status (12)

Cited By (1)

Families Citing this family (5)

Citations (3)

Family Cites Families (7)

• 2009
  • 2009-10-13 AT AT0161009A patent/AT508264B1/de not_active IP Right Cessation
• 2010
  • 2010-08-30 JP JP2012533429A patent/JP5542945B2/ja not_active Expired - Fee Related
  • 2010-08-30 CA CA2776760A patent/CA2776760A1/en not_active Abandoned
  • 2010-08-30 KR KR1020127009320A patent/KR20120099399A/ko not_active Application Discontinuation
  • 2010-08-30 US US13/501,556 patent/US20120223466A1/en not_active Abandoned
  • 2010-08-30 MX MX2012003805A patent/MX2012003805A/es active IP Right Grant
  • 2010-08-30 RU RU2012119519/06A patent/RU2506496C2/ru not_active IP Right Cessation
  • 2010-08-30 EP EP10760210A patent/EP2488790A1/de not_active Withdrawn
  • 2010-08-30 WO PCT/AT2010/000313 patent/WO2011044596A1/de active Application Filing
  • 2010-08-30 CN CN201080046114XA patent/CN102597621A/zh active Pending
  • 2010-09-01 TW TW099129385A patent/TW201113480A/zh unknown
• 2012
  • 2012-03-20 ZA ZA2012/02059A patent/ZA201202059B/en unknown

Patent Citations (3)

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