CA2776760A1 - Device for heat-treating sheet metal strips - Google Patents

Device for heat-treating sheet metal strips Download PDF

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Publication number
CA2776760A1
CA2776760A1 CA2776760A CA2776760A CA2776760A1 CA 2776760 A1 CA2776760 A1 CA 2776760A1 CA 2776760 A CA2776760 A CA 2776760A CA 2776760 A CA2776760 A CA 2776760A CA 2776760 A1 CA2776760 A1 CA 2776760A1
Authority
CA
Canada
Prior art keywords
pipe
middle pipe
bridge
elbows
pipes
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.)
Abandoned
Application number
CA2776760A
Other languages
French (fr)
Inventor
Robert Ebner
Eduard Morbitzer
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.)
Ebner Industrieofenbau GmbH
Original Assignee
Ebner Industrieofenbau GmbH
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
Application filed by Ebner Industrieofenbau GmbH filed Critical Ebner Industrieofenbau GmbH
Publication of CA2776760A1 publication Critical patent/CA2776760A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00Combustion apparatus characterised by the shape of the combustion chamber
    • F23C3/002Combustion apparatus characterised by the shape of the combustion chamber the chamber having an elongated tubular form, e.g. for a radiant tube
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12Radiant burners
    • F23D14/126Radiant burners cooperating with refractory wall surfaces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D91/00Burners specially adapted for specific applications, not otherwise provided for
    • F23D91/02Burners specially adapted for specific applications, not otherwise provided for for use in particular heating operations
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23MCASINGS, 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
    • F23M9/00Baffles or deflectors for air or combustion products; Flame shields
    • F23M9/003Baffles or deflectors for air or combustion products; Flame shields in flue gas ducts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23MCASINGS, 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
    • F23M9/00Baffles or deflectors for air or combustion products; Flame shields
    • F23M9/08Helical or twisted baffles or deflectors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00Subject matter not provided for in other groups of this subclass
    • F27D99/0001Heating elements or systems
    • F27D99/0033Heating elements or systems using burners
    • F27D99/0035Heating indirectly through a radiant surface
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23CMETHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/03009Elongated tube-shaped combustion chambers

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)

Abstract

The invention relates to a device for heat-treating sheet metal strips (6), comprising at least one steel pipe unit (1), which has three pipes lying in a common axial plane parallel to the sheet metal strip (6), namely a middle pipe (2) that can be connected to a burner and two outer pipes (3) that are connected at both ends to the middle pipe (2) by means of pipe bends (4), and a bearing journal (9) on the side of the steel pipe unit opposite the burner, the bearing journal being connected to the two pipe bends (4) between the middle pipe (2) on the one side and the two outer pipes (3) on the other side. In order to consider the thermal expansion that occurs in the area of the pipe bends (4), the bearing journal (9) is arranged on a bridge (10) that bridges a spandrel (11) between the two pipe bends (4), the bridge having two sections (12) that extend on either side of the axis of the middle pipe (2) and that are angled at an acute angle from the axis of the middle pipe (2).

Description

Device for heat-treating sheet metal strips 1. Field of the Invention The invention relates to a device for heat-treating sheet metal strips having at least one radiator pipe unit, which has three pipes located in a common axial plane parallel to the sheet-metal strip, namely one middle pipe connectable to a burner and two outer pipes connected at both ends to the middle pipe via pipe elbows, and having a bearing pin, which is connected to the two pipe elbows between the middle pipe on one side and the two outer pipes on the other side, on the side of the radiator pipe unit opposite to the burner.
2. Description of the Prior Art For heat-treating sheet metal strips (DE 20 2008 009 065 U1), providing radia-tor pipe units which can be heated with the aid of burners is known, which have two outer pipes originating from a middle pipe connected to the burner, located parallel to the middle pipe in a common axial plane, so that with the aid of the outer pipes connected terminally via pipe elbows to the middle pipe, a partial stream of the hot exhaust gases of the burner flowing in the middle pipe can be guided in the circuit in each case. The sheet-metal strip to be treated, which is conveyed parallel to the common axial plane of the pipes of the radiator pipe unit having a feed direction extending transversely to the pipe axes, is heated via the thermal radiation emitted from the pipes of the radiator pipe unit. Be-cause of the high temperatures of the radiator pipes, the mounting of the radia-tor pipe unit is to be designed so that the thermal expansions of the pipes in the axial direction are taken into consideration. For this purpose, the middle pipe is axially fixed between the burner and outer pipes in a pivot bearing, while at the opposite end of the radiator pipe unit, a typically hollow bearing pin, which is welded onto the two pipe elbows connecting the ends of the middle pipe to the ends of the outer pipes, is supported so it is axially displaceable in a support.
However, because thermal expansions occur not only in the direction of the pipe axes, but rather also in the area of the pipe elbows transversely thereto, a significant strain of the weld seams results between the bearing pin and the pipe elbows, which results in the danger of cracking, in particular because the strength of the steels used is reduced because of the high temperature strain.
SUMMARY OF THE INVENTION

The invention is therefore based on the object of implementing a device of the type mentioned at the beginning for heat-treating sheet metal strips in such a manner that the thermal expansions in the area of the pipe elbows connecting the metal pipe to the outer pipes can be taken into consideration when attach-ing the bearing pin to these pipe elbows.

The invention achieves the stated object in that the bearing pin is arranged on a bridge, which bridges a gusset between the two pipe elbows, having two sections extending on both sides of the axis of the middle pipe and inclined at an acute angle to the axis of the middle pipe.

Through the bridge which bridges the gusset area between the two pipe el-bows, an advantageous condition is provided for accommodating thermal expansions in the area of the pipe elbows, so that the connection between the bearing pin and the bridge can be kept substantially tension-free. In addition, a direct heat transfer from the pipe elbows to the bearing pin is suppressed by the bridge, whereby the thermal strain of the bearing pin is reduced. In order that thermal expansions in the area of the two pipe elbows can advantageously be accommodated via the bridge, the bridge has two sections extending on both sides of the axis of the middle pipe and inclined at an acute angle to the axis of the middle pipe, so that through an angle change of the sections of the bridge inclined to one another at an obtuse angle, because of bending strains occurring in the elastic range, a sufficient length compensation is possible upon a thermal expansion of the pipe elbows.

Particularly simple design conditions result in this context if the bridge is im-plemented as symmetrical to the axis of the metal pipe, because in this case the coaxial mounting of the radiator unit to the middle pipe can be ensured in a simple manner.

BRIEF DESCRIPTION OF THE DRAWING

The object of the invention is shown as an example in the drawing. In the fig-ures Figure 1shows a device according to the invention for heat-treating sheet metal strips in detail in the area of the radiator pipe unit in a simplified side view and Figure 2 shows the radiator pipe unit in detail in the area of the bearing pin in a partially cutaway side view in a larger scale.

DESCRIPTION OF THE PREFERRED EMBODIMENT

As can be inferred from Figure 1, the device for heat-treating sheet metal strips has at least one radiator pipe unit 1, which comprises a middle pipe 2 and two parallel outer pipes 3 located in a common axial plane with the middle pipe 2.
The outer pipes 3 each have a flow connection to the middle pipe 2 via terminal pipe elbows 4. The hot exhaust gases flowing from a burner, which is attached to an extension 5 of the middle pipe 2, into the middle pipe 2 are therefore partially guided in the circuit via the two outer pipes 3. A sheet-metal strip 6, which is indicated by dot-dash lines, and which is guided parallel to the com-mon axial plane of the pipes 2, 3, in a feed direction 7 which extends trans-versely to the pipe axes, is heated with the aid of the radiant heat emitted from the pipes 2, 3.

The radiator pipe unit 1 is mounted on both sides of the pipes 2 and 3, so that a substantially uniform distribution of the weight load on the two supports results.
While the support 8, which accommodates the extension 5 of the middle pipe 2 and is not shown for reasons of clarity, axially fixes the radiator pipe unit 1, the opposing support 8 supports the radiator pipe unit 1 so it is axially displaceable.
For this purpose, the radiator pipe unit 1 carries, on the end of the middle pipe 2 opposite to the extension 5, a typically tubular bearing pin 9, which is sup-ported so it is axially displaceable in a corresponding receptacle of the support 8. Because of the high exhaust gas temperatures inside the pipes 2, 3, these pipes are subjected to a corresponding thermal expansion, the axial length compensation thus required being ensured via the bearing pin 9, which is displaceable in the support 8. However, not only the pipes 2, 3, but rather also the pipe elbows 4 are subject to a thermal strain, which causes a thermal ex-pansion of the pipe elbows in the elbow longitudinal direction. In order that these thermal expansions in the area of the pipe elbows 4 can also be taken into consideration, the bearing pin 9 is not fastened directly on the pipe elbow 4, but rather is arranged on a bridge 10, which bridges the gusset area 11 between the two pipe elbows 4. Therefore, thermal expansions of the pipe elbows 4 can be compensated for via this bridge.

According to Figure 2, the bridge 10 is formed for this purpose by two sections 12, which extend at an acute angle to the axis of the middle pipe 2 and enclose an obtuse angle with one another. If the distance of the weld seams between the sections 12 and the pipe elbows 4 changes because of thermal expansions of the pipe elbows 4, these length changes can be readily compensated for by elastic bending and a change of the angle of the sections 12 connected thereto.
This means that the weld seams between the sections 12 of the bridge 10 and the bearing pin 9 remain substantially free of tensions as a result of the thermal expansion of the pipe elbows 4, which avoids the danger otherwise occurring to the connection of the bearing pin 9 to the pipe elbows 4. In addition, the direct heat transfer from the pipe elbows 4 to the bearing pin 9 is interrupted via the sections 12 of the bridge 10 and therefore a lesser thermal strain of the bearing pin 9 can be expected.

Claims (2)

1. A device for heat-treating sheet metal strips (6) having at least one radiator pipe unit (1), which has three pipes located in a common axial plane parallel to the sheet-metal strip (6), namely one middle pipe (2) attachable to a burner and two outer pipes (3) connected at both ends to the middle pipe (2) via pipe elbows (4), and having a bearing pin (9), connected to the two pipe elbows (4) between the middle pipe (2) on one side and the two outer pipes (3) on the other side, on the side of the radiator pipe unit opposite to the burner, characterized in that the bearing pin (9) is arranged on a bridge (10), which bridges a gusset (11) between the two pipe elbows (4), having two sections (12) which extend on both sides of the axis of the middle pipe (2) and are in-clined at an acute angle to the axis of the middle pipe (2).
2. The device according to Claim 1, characterized in that the bridge (10) is implemented symmetrically to the axis of the middle pipe (2).
CA2776760A 2009-10-13 2010-08-30 Device for heat-treating sheet metal strips Abandoned CA2776760A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT0161009A AT508264B1 (en) 2009-10-13 2009-10-13 DEVICE FOR HEAT TREATMENT OF TAPE BANDS
ATA1610/2009 2009-10-13
PCT/AT2010/000313 WO2011044596A1 (en) 2009-10-13 2010-08-30 Device for heat-treating sheet metal strips

Publications (1)

Publication Number Publication Date
CA2776760A1 true CA2776760A1 (en) 2011-04-21

Family

ID=43302228

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2776760A Abandoned CA2776760A1 (en) 2009-10-13 2010-08-30 Device for heat-treating sheet metal strips

Country Status (12)

Country Link
US (1) US20120223466A1 (en)
EP (1) EP2488790A1 (en)
JP (1) JP5542945B2 (en)
KR (1) KR20120099399A (en)
CN (1) CN102597621A (en)
AT (1) AT508264B1 (en)
CA (1) CA2776760A1 (en)
MX (1) MX2012003805A (en)
RU (1) RU2506496C2 (en)
TW (1) TW201113480A (en)
WO (1) WO2011044596A1 (en)
ZA (1) ZA201202059B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202008009065U1 (en) * 2008-07-04 2008-10-09 WS Wärmeprozesstechnik GmbH Radiant heating arrangement with delay compensation
AT508264B1 (en) * 2009-10-13 2010-12-15 Ebner Ind Ofenbau DEVICE FOR HEAT TREATMENT OF TAPE BANDS
AT508368B1 (en) 2009-10-13 2011-01-15 Ebner Ind Ofenbau DEVICE FOR HEAT TREATMENT OF TAPE BANDS
US9381787B2 (en) * 2012-10-26 2016-07-05 Hamilton Sundstrand Corporation Generally wye shaped elbow for cabin air flow system
CN104995470B (en) * 2013-01-02 2017-12-22 马西米亚诺·比松 Supporting arrangement for radiant tube
DE102020100748A1 (en) * 2020-01-14 2021-07-15 Loi Thermprocess Gmbh Device for supporting at least two radiant heating tubes in an oven room and an industrial oven

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU84040A1 (en) * 1982-03-26 1983-11-17 Cockerill Sambre Sa IMPROVED SUPPORTS OF ANNEALING OVEN HEATING BODY
FR2643447B1 (en) * 1989-02-17 1991-10-04 Stein Heurtey RADIANT TUBE SYSTEM FOR HEATING OVENS
JP2579773Y2 (en) * 1993-02-25 1998-08-27 中外炉工業株式会社 Thermal storage radiant tube system
JP3549981B2 (en) * 1996-05-08 2004-08-04 新日本製鐵株式会社 Furnace support structure of radiant tube with alternating heat storage
JP3855369B2 (en) * 1997-05-26 2006-12-06 Jfeスチール株式会社 Radiant tube support device
JP2002317905A (en) * 2001-04-23 2002-10-31 Nippon Steel Corp In-furnace support structure of regenerative alternating combustion type radiant tube
FR2920439B1 (en) * 2007-09-03 2009-11-13 Siemens Vai Metals Tech Sas METHOD AND DEVICE FOR THE CONTROLLED OXIDATION / REDUCTION OF THE SURFACE OF A CONTINUOUSLY STRAY STEEL BAND IN A RADIANT TUBE OVEN FOR ITS GALVANIZATION
CN201246745Y (en) * 2008-05-28 2009-05-27 烟台百思特炉管厂 Suspension type bearing W type radiant tube apparatus in gas type heating furnace
DE202008009065U1 (en) * 2008-07-04 2008-10-09 WS Wärmeprozesstechnik GmbH Radiant heating arrangement with delay compensation
AT508264B1 (en) * 2009-10-13 2010-12-15 Ebner Ind Ofenbau DEVICE FOR HEAT TREATMENT OF TAPE BANDS

Also Published As

Publication number Publication date
ZA201202059B (en) 2013-05-29
WO2011044596A1 (en) 2011-04-21
US20120223466A1 (en) 2012-09-06
KR20120099399A (en) 2012-09-10
MX2012003805A (en) 2012-05-08
AT508264A4 (en) 2010-12-15
AT508264B1 (en) 2010-12-15
JP5542945B2 (en) 2014-07-09
JP2013507598A (en) 2013-03-04
RU2506496C2 (en) 2014-02-10
EP2488790A1 (en) 2012-08-22
RU2012119519A (en) 2013-11-20
TW201113480A (en) 2011-04-16
CN102597621A (en) 2012-07-18

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Legal Events

Date Code Title Description
EEER Examination request
FZDE Discontinued

Effective date: 20150902