US3620513A - Method and machine for the rapid heating of tubes - Google Patents

Method and machine for the rapid heating of tubes Download PDF

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Publication number
US3620513A
US3620513A US887520A US3620513DA US3620513A US 3620513 A US3620513 A US 3620513A US 887520 A US887520 A US 887520A US 3620513D A US3620513D A US 3620513DA US 3620513 A US3620513 A US 3620513A
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US
United States
Prior art keywords
tube
furnace
burner
open
exhaust gasses
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
US887520A
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English (en)
Inventor
Hans-Joachim Wernicke
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.)
Messer Griesheim GmbH
Original Assignee
Messer Griesheim 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
Priority claimed from DE19681817032 external-priority patent/DE1817032C3/de
Application filed by Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Application granted granted Critical
Publication of US3620513A publication Critical patent/US3620513A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • 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

Definitions

  • Marmorek [31] P18170316 [54] FOR THE RAPID ABSTRACT A method and machine for rapidly heating an 4 cl im 1 D F open-ended tube in a furnace provides for placing the tube on a a support inside a tunnel furnace and projecting the flame ofa [52] US. Cl 263/4 burner through one of the tube ends into the interior of the [51] Int. Cl F27b 3/02 tube. The burner thus will act as an injector drawing the ex- [50] Field of Search A 263/4, 5 R. haust gases. that exit at the other tube end around to return 52 outside the tube and to reenter the tube at the one end.
  • the invention relates to methods and machinery for the rapid heating of tubes or the like, such as drums, in a furnace. More particularly, the invention relates such method and machinery of the type that is used for quickly heating tube blooms which subsequently will be rolled in rolling mills.
  • Such tube blooms are rolled in tube-rolling mills, for instance in reduction rolling mills; before the rolling, however, the blooms will need to be heated to the necessary rolling temperature; and that rolling temperature varies with the composition of the material of the tube.
  • Such heating is carried out rapidly in continuous heating furnaces.
  • gas burners have been provided in such continuous heating furnaces and the combustion gases of these burners been applied to the exterior of the tube, or the tube has been heated on the exterior electrically. During such heating, the tubes are moved longitudinally.
  • roller-type heating furnaces which are traversed by the tubes.
  • the invention accordingly has among its principal objects to provide means and machinery for economically carrying out quick heating of tubes and tubelike structures such as forged or welded drums.
  • the instant invention provides for introducing the burner flame into one of the open ends of the tube to heat the tube from the inside thereby acting as an injector causing the exhaust gases that exit from the other end to turn around and to reenter the tube interior at the aforesaid one end through which the burner projects.
  • an amount of suitably cooled heating gases will be withdrawn through a chimney continuously, in accordance with the amount of combustion gases being produced during the respective time period.
  • the combustion gasses are introduced into the aforesaid longitudinal central axis of the tube, so that the tube itself will act as an injector nozzle and will cause the heating gas to turn around for subsequent reentry at the burner end, without need for any additional outside energy means for guiding the gasses.
  • such guide means may be provided for aiding the turnaround of the exiting gases and for aiding their reentry.
  • This danger to a large extent is avoided by the instant invention, in that the surface which obtains most of the heat is the internal surface which is under compressive stress.
  • the single view is a vertical sectional view of a furnace containing atube, in accordance with the invention.
  • the tube 1 is shown inside a'tunnel furnace 2.
  • the tube 1 is supported on a preferably movable support, such as a truck 3 that can be moved in axially opposite directions, as indicated by the straight arrows in the drawing.
  • the tube can be rotated about its longitudinal axis, by means of conventional well-known rotating mechanisms.
  • One end side of the furnace 2 is formed as a movable door 4, through which the furnace 2 is charged.
  • the opposite end side defines a chimney 5 through which the burner 6 projects into the chamber of the furnace 2.
  • the combustion gasses are blown into the aforesaid longitudinal central axis of the tube 1.
  • the discharge nozzle of the burner 6 is positioned inside the tube 1 near its end side. In this manner, the burner acts as an injector and sucks in the exhaust gasses that exit at the far end (the right-hand side end of the drawing) of the tube 1 in order to provide for the reentry thereof at the end through which the burner 6 projects (the left-hand side end of the drawing), as shown by the U-shaped arrows in the drawing.
  • the turning about and subsequent reentry of the exhaust gasses may be aided by means of guide means, such as shaped elements 7.
  • This heating on the interior combined with the guiding of the exhaust gasses will provide for a rapid and uniform heating of the wall of the tube 1.
  • burners particularly oxygen fuel jet beam torches, as their closely concentrated beam that exits from the torch nozzle at a high impulse is particularly suitable for generating the desired aforesaid injector effect.
  • These type burners or torches provide for the combustion of combustible gas and oxygen in almost any desired ratio, for instance almost stoichiometrically, and in ideal flame guidance. Therefore, they enable the control of scaling at the external surface of the tube, which can be kept very low or be eliminated altogether.
  • tubes 1 may be positioned parallel to each other and be heated simultaneously. lnstead of placing them horizontally as shown in the drawing, they may be placed in other positions, for instance vertically.
  • said burner acting as an injector sucking said exiting exhaust gasses to turn around and to reenter the tube through said one open end, and the step of returning said exhaust gasses prior to their reentry along the exterior of the tube.
  • said burner acting as an injector sucking said exiting exhaust gasses to turn around and to reenter the tube through said one open end, and the steps of rotating said tube during at least a part of the heating operation
  • a machine for rapidly heating an open-ended tube comprising in combination a tunnel-shaped furnace including two end walls, one end wall being movable for the passage of said tube, and including a chimney near the other end wall,
  • a burner including combustion gas discharge means inside said furnace positionable to project with its flamedischarging portion into the interior of said tube within said furnace through one of the open tube ends, and guide means for directing the exhaust gasses exiting from the other tube end to flow alongside the exterior of the tube for subsequent reentry of the exhaust gasses into the tube interior through said one end.
  • a machine for rapidly heating an open-ended tube comprising in combination,
  • a tunnel-shaped furnace including two end walls, one end wall being movable for the passage of said tube, and including a chimney near the other end wall,

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Gas Burners (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Tunnel Furnaces (AREA)
US887520A 1968-12-27 1969-12-23 Method and machine for the rapid heating of tubes Expired - Lifetime US3620513A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681817032 DE1817032C3 (de) 1968-12-27 Tunnelofen zur Schnellerwarmung von warmzuverformenden metallischen Rohren

Publications (1)

Publication Number Publication Date
US3620513A true US3620513A (en) 1971-11-16

Family

ID=5717410

Family Applications (1)

Application Number Title Priority Date Filing Date
US887520A Expired - Lifetime US3620513A (en) 1968-12-27 1969-12-23 Method and machine for the rapid heating of tubes

Country Status (6)

Country Link
US (1) US3620513A (de)
AT (1) AT297076B (de)
BE (1) BE742967A (de)
FR (1) FR2027179A1 (de)
GB (1) GB1299186A (de)
NL (1) NL163267C (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3752642A (en) * 1969-03-10 1973-08-14 Garrett Corp Apparatus for brazing
US3905759A (en) * 1973-05-08 1975-09-16 Ceraver Tunnel kiln for heat treatment of cylindrical products
US3958921A (en) * 1974-03-07 1976-05-25 Mannesmann Aktiengesellschaft Multiple chamber heating unit
US4444559A (en) * 1982-06-28 1984-04-24 International Business Machines Corporation Process and apparatus for unsoldering solder bonded semiconductor devices
US4854863A (en) * 1987-12-02 1989-08-08 Gas Research Institute Convective heat transfer within an industrial heat treating furnace
US4963091A (en) * 1989-10-23 1990-10-16 Surface Combustion, Inc. Method and apparatus for effecting convective heat transfer in a cylindrical, industrial heat treat furnace
US5228850A (en) * 1989-10-23 1993-07-20 Surface Combustion, Inc. Industrial furnace with improved heat transfer
US5478985A (en) * 1993-09-20 1995-12-26 Surface Combustion, Inc. Heat treat furnace with multi-bar high convective gas quench
EP1802914A1 (de) * 2004-10-22 2007-07-04 Sandvik Intellectual Property AB Verfahren zur verbrennung mit hilfe von brennern in industrieöfen und brenner dafür

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US745432A (en) * 1903-04-04 1903-12-01 Alford Alvin Gohn Barrel-heater.
US1445220A (en) * 1920-07-14 1923-02-13 Gen Motors Res Corp Furnace
US1556011A (en) * 1925-10-06 Wheel pit
US3185454A (en) * 1963-03-26 1965-05-25 Kamalian Neubar Device for handling a rocket motor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1556011A (en) * 1925-10-06 Wheel pit
US745432A (en) * 1903-04-04 1903-12-01 Alford Alvin Gohn Barrel-heater.
US1445220A (en) * 1920-07-14 1923-02-13 Gen Motors Res Corp Furnace
US3185454A (en) * 1963-03-26 1965-05-25 Kamalian Neubar Device for handling a rocket motor

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3752642A (en) * 1969-03-10 1973-08-14 Garrett Corp Apparatus for brazing
US3905759A (en) * 1973-05-08 1975-09-16 Ceraver Tunnel kiln for heat treatment of cylindrical products
US3958921A (en) * 1974-03-07 1976-05-25 Mannesmann Aktiengesellschaft Multiple chamber heating unit
US4444559A (en) * 1982-06-28 1984-04-24 International Business Machines Corporation Process and apparatus for unsoldering solder bonded semiconductor devices
US4854863A (en) * 1987-12-02 1989-08-08 Gas Research Institute Convective heat transfer within an industrial heat treating furnace
US4963091A (en) * 1989-10-23 1990-10-16 Surface Combustion, Inc. Method and apparatus for effecting convective heat transfer in a cylindrical, industrial heat treat furnace
US5074782A (en) * 1989-10-23 1991-12-24 Surface Combustion, Inc. Industrial furnace with improved heat transfer
US5127827A (en) * 1989-10-23 1992-07-07 Surface Combustion, Inc. Industrial furnace with improved heat transfer
US5228850A (en) * 1989-10-23 1993-07-20 Surface Combustion, Inc. Industrial furnace with improved heat transfer
US5478985A (en) * 1993-09-20 1995-12-26 Surface Combustion, Inc. Heat treat furnace with multi-bar high convective gas quench
US5550858A (en) * 1993-09-20 1996-08-27 Surface Combustion, Inc. Heat treat furnace with multi-bar high convective gas quench
EP1802914A1 (de) * 2004-10-22 2007-07-04 Sandvik Intellectual Property AB Verfahren zur verbrennung mit hilfe von brennern in industrieöfen und brenner dafür
US20080085485A1 (en) * 2004-10-22 2008-04-10 Sandvik Intellectual Property Ab Method Of Combustion With The Aid Of Burners In Industrial Furnaces,And A Burner To This End
US7993130B2 (en) * 2004-10-22 2011-08-09 Sandvik Intellectual Property Ab Method of combustion with the aid of burners in industrial furnaces, and a burner to this end
EP1802914A4 (de) * 2004-10-22 2012-01-04 Sandvik Intellectual Property Verfahren zur verbrennung mit hilfe von brennern in industrieöfen und brenner dafür

Also Published As

Publication number Publication date
GB1299186A (en) 1972-12-06
NL6918512A (de) 1970-06-30
NL163267B (nl) 1980-03-17
AT297076B (de) 1972-03-10
NL163267C (nl) 1980-08-15
DE1817032A1 (de) 1970-07-09
DE1817032B2 (de) 1977-02-24
BE742967A (de) 1970-05-14
FR2027179A1 (de) 1970-09-25

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