DE1817032A1 - Method and device for rapid heating of pipes with burners - Google Patents

Method and device for rapid heating of pipes with burners

Info

Publication number
DE1817032A1
DE1817032A1 DE19681817032 DE1817032A DE1817032A1 DE 1817032 A1 DE1817032 A1 DE 1817032A1 DE 19681817032 DE19681817032 DE 19681817032 DE 1817032 A DE1817032 A DE 1817032A DE 1817032 A1 DE1817032 A1 DE 1817032A1
Authority
DE
Germany
Prior art keywords
pipe
burner
pipes
burners
rapid heating
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.)
Granted
Application number
DE19681817032
Other languages
German (de)
Other versions
DE1817032B2 (en
DE1817032C3 (en
Inventor
Wernicke Dr-Ing Hans-Joachim
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
Application filed by Messer Griesheim GmbH filed Critical Messer Griesheim GmbH
Priority claimed from DE19681817032 external-priority patent/DE1817032C3/en
Priority to DE19681817032 priority Critical patent/DE1817032C3/en
Priority to AT1107269A priority patent/AT297076B/en
Priority to NL6918512.A priority patent/NL163267C/en
Priority to BE742967D priority patent/BE742967A/xx
Priority to FR6943342A priority patent/FR2027179A1/fr
Priority to GB62584/69A priority patent/GB1299186A/en
Priority to US887520A priority patent/US3620513A/en
Publication of DE1817032A1 publication Critical patent/DE1817032A1/en
Publication of DE1817032B2 publication Critical patent/DE1817032B2/en
Publication of DE1817032C3 publication Critical patent/DE1817032C3/en
Application granted granted Critical
Expired 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
    • C21D9/08Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • 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

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)
  • Tunnel Furnaces (AREA)
  • Gas Burners (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Description

HESSER GRIBSHEIIi CI-ISH . HG 4-67 HESSER GRIBSHEIIi CI-ISH. HG 4-67

Kennwort: Rohrinrienervärnung 1817032Password: Rohrinrienervärnung 1817032

Erfinder: Dr. ¥ernickeInventor: Dr. ¥ ernicke

Verfahren und Torrichtung zur Schnellerwärmung von Rohren mit brennernProcedure and door direction for rapid heating of pipes with burners

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Sohnellerwärmung von Rohren oder Trommeln in einem Ofen»The invention relates to a method and a device for Heating of pipes or drums in a furnace »

. Rohrluppen, die in Rohrwalzwerken, z.B. Streckreduzierwalzwerken, gewalzt werden sollen, müssen zuvor auf die der Werkstoff zusammensetzung entsprechende Walztemperatur erwärmt werden. Dies geschieht durch Schnellerwärmung in DurchlaufÖfen mit Gasbrennern, deren Brenngase das Röhr von außen beaufschlagen oder durch elektrische Erwärmung. Die Rohre werden dabei längs bewegt. Oder es werden Rollherdöfen benutzt, die die. Tube blanks that are used in tube rolling mills, e.g. stretch-reducing mills, are to be rolled, must first be on the material Composition is heated to the corresponding rolling temperature will. This is done by rapid heating in continuous ovens with gas burners, the combustion gases of which act on the tube from the outside or by electrical heating. The pipes are moved lengthways. Or roller hearth ovens are used, which

Rohre quer durchlaufen. Bei Rohren großer Durchmesser und insbesondere bei großen Wandstärken läßt sich dieses Verfahren nur mit großem Aufwand an Ofenvolumen durchführen, damit besonders bei großen Wandstärken eine gleichmäßige Erwärmung gewährleistet ist. Das Walzen großer Rohrdurchmesser, die auch große V/andotärken des Vornaterials erfordern, ist technisch gelöst, nicht aber die wirtschaftliche Erwärmung auf Y/alztemperatur. .Run through pipes across. For pipes of large diameters and in particular In the case of large wall thicknesses, this process can only be carried out with a great deal of effort in terms of furnace volume, and therefore especially Even heating is guaranteed for large wall thicknesses. The rolling of large pipe diameters that too Requiring large thicknesses of the front material is technical solved, but not the economic warming to normal temperature. .

Der Erfindung liegt die Aufgabe zugrunde, ein Schnellerwärmungsverfahren für Rohre und geschmiedete oder geschweißte Trommeln zu schaffen, mit dessen Hilfe es'möglich ist, auch dickwandige Rohre großer Durchmesser einwandfrei zu erwärmen.The invention is based on the object of a rapid heating method for tubes and forged or welded drums to create, with the help of which it’s possible, even thick-walled ones To heat pipes of large diameter perfectly.

Es wurde nun gefunden, daß can ein derartiges Verfahren durchführen kann, wenn gemäß der Erfindung die Brennerflamme in ein Rohrende hineingerichtot wird, das Rohr von innen erhitzt und ala Injektor wirkend das am Rohrende austretende Abgas durch Ansaugen umwälzt.It has now been found that such a method can be carried out if, according to the invention, the burner flame is in The end of the pipe is poured in, the pipe is heated from the inside and ala Acting as an injector, the exhaust gas exiting at the end of the pipe circulates by suction.

• ■ - 2 -• ■ - 2 -

009828/0781009828/0781

Eg ist vorteilhaft, bei der Erwärmung da3 Rohr nur in Längsrichtung hin- und hergehen·-] zu bev/egen und dabei auch zu drehen, da dann der Brenner nicht nitbewegt werden muß. Eine der ilonge der ständig neu entstehenden Brenngase entsprechende Menge abgekühlter Heizgase wird laufend abgezogen. Es ist wichtig zur Durchführung des Verfahrens, dafl die Brenngase in die Rohrachse eingeblasen werden/ d^rnit das Rohr selbst als Injektordüse wirkt und die Heizgasumwülzung ohne zusätzliche Fremdenergie erfolgt. Es ist selbstverständlich möglich, das Verfahren mit nur einem Brenner auszuführen, sofern die Rohrabmessungen dies zulassen. Ein besonderer Vorteil liegt in der guten Ausnutzung des Wärmeinhaltes der Abgase durch den gleichzeitig von innen und außen erfolgenden durch die schnell strömenden Heizgase bewirkten Wärmeübergang.Eg it is advantageous when the pipe is heated only in the longitudinal direction to move back and forth -] to move and turn, because then the burner does not have to be moved. One of the ilonge corresponding to the constantly emerging fuel gases The amount of cooled heating gases is continuously withdrawn. It is important to carry out the procedure that the fuel gases are blown into the pipe axis / the pipe itself acts as an injector nozzle and the hot gas circulation without additional External energy takes place. It is of course possible to carry out the process with only one burner, provided the pipe dimensions allow this. A particular advantage is the good utilization of the heat content of the exhaust gases by the at the same time Heat transfer from inside and outside caused by the rapidly flowing heating gases.

Ein weiterer Vorteil des Verfahrens besteht darin, da3 im Gegensatz zur Sehnellerw.Hrmung von außen her die Gefahr der Bildung von WKrmerissen erheblich verringert wird, da die am stärksten erwärmte Seite, die Innenseite, unter Druckspannung steht. V/eitere Vorteile sind die geringe Wärmebelastung den Ofenmauerwerkes durch die Abschirmung der Flarrraenc trab lung und deren Absorption durch die Rohrinnenwand und die Möglichkeit, die Brenner so zu stellen, daß die Rohroberfläche nicht direkt von der Flamme getroffen wird, wobei die auf das Rohr Übertragene Wärmemenge nicht verringert wird.Another advantage of the method is that in contrast the danger of formation from the outside against the tendon wave of working cracks is considerably reduced, since the am most heated side, the inside, under compressive stress stands. Other advantages are the low heat load Furnace masonry through the shielding of the floor panels and their absorption through the inner wall of the pipe and the possibility of placing the burner so that the pipe surface does not is hit directly by the flame, with the falling on the pipe The amount of heat transferred is not reduced.

Die Zeichnung veranschaulicht ein vereinfachtes Ausführungsbeispiel der Erfindung im Längsschnitt.The drawing illustrates a simplified embodiment of the invention in longitudinal section.

Das zu erwärmende Rohr 1 befindet sich in einem tunnelförmigen Ofen 2. Es ist auf Rollwagen 3 gelagert und kann in Achsrichtung hin- und herbewegt werden. Außerdem kann es um seine Ach3e gedreht werden. Eine Stirnseite des Ofene 2 ist al3 Schv/cn'.ctür h ausgebildet, durch welche der Ofen beschickt wird. Die andere Stirnseite bildet den Kamin 5* durch welchen der Brenner 6 in den Ofenraum ragt. Die Brenngase werden in dia Rohrachse ein» geblasen. Dor Bronner 6 wirkt somit als Injrlctor» und saugt di© an der Rohraußonceltc zurückströmenden Brenngase an, um sie erneut durch das Rohr innere zu schicken. Die Strömung© verhii It-The pipe 1 to be heated is located in a tunnel-shaped furnace 2. It is mounted on trolleys 3 and can be moved back and forth in the axial direction. It can also be rotated around its axis. One end face of the Ofene 2 is formed al3 SChv / h cn'.ctür through which the furnace is charged. The other face forms the chimney 5 * through which the burner 6 protrudes into the furnace space. The fuel gases are blown into the pipe axis. Dor Bronner 6 thus acts as Injrlctor "and sucks di © at the Rohraußonceltc flowing back fuel gases in order to send them again inside through the tube. The current © Verhii It-

009828/0701009828/0701

»AD“AD

nissc sind durch Pfeile angedeutet. Die Umlenkung der Brenngase wird durch Formstücke 7 begünstigt. Durch den umlaufenden Brenngas3trom wird eine schnelle und ßlcichn'jßiso Urwärniunc der Rohrwand erreicht. Lurch don Kumin 5 wird laufend eine Brenncastnonge ab^ezo^en, die der durch den Brenner 6 zußeführten entspricht. nissc are indicated by arrows. The diversion of the fuel gases is favored by fittings 7. Through the encircling Fuel gas flow is a quick and easy primal heat reached the pipe wall. Lurch don Kumin 5 is continuously becoming one Brenncastnonge from ^ ezo ^ en, which corresponds to that fed through the burner 6.

Vor allem geeignet für das Verfahren sind Hdchgeschwlndigkeitsbrenner, insbesondere Säuerstoff-Brennstoff-otrahlbrenner, da deren scharf gebündelter, mit hohem Impuls austretender Strahl zur Erzeugung der gewünschten Injektorwirkung besonders geeignet ist. Da bei diesen Brennern iJrenngas und Sauerstoff in Jedem beliebigen Verhältnis, z. 3. nahezu-stöchiometrisch und in idealer fr^lammenführunr; verbrannt worden können, kann auch die Verzunderung der Rohroberflache beherrscht und daher gering gehalten oder ganz ausgeschlossen werden.High-speed burners are particularly suitable for the process, in particular oxygen fuel jet burners, because their sharply focused jet, exiting with high momentum, is particularly important for generating the desired injector effect suitable is. As with these burners there is fuel gas and oxygen in any ratio, e.g. 3. almost stoichiometric and in ideal leadership; could be burned can also master the scaling of the pipe surface and can therefore be kept to a minimum or excluded altogether.

Es sind mannigfache Abwandlungen von diesem Schema möglich. So können z. B. mehrere Rohre parallel gelagert und gleichzeitig erhitzt werden. Sie können auch senkrecht gestellt werden.There are many possible modifications to this scheme. So z. B. several pipes are stored in parallel and heated at the same time. They can also be placed vertically will.

9.12.1968
Ba/ΐΐΓ
December 9, 1968
Ba / ΐΐΓ

009828/0 7 81 BAD009828/0 7 81 BA D

«•ι..«• ι ..

Claims (1)

MESSER GRIESHEIH GMBH - ^ MESSER GRIESHEIH GMBH - ^ MG 467MG 467 AnsprücheExpectations 1. Verfahren zur Schnellerwärmung τοη Rohren mit mindeetene einem Brenner in einem Ofen, dadurch gekennzeichnet, dafl die Brennerflamae in ein Bohrende hineingeriohtet wird, das Rohr von innen erhitzt und ale Injektor wirkend das am Rohrende austretende Abgas durch Ansaugen umwälzt.1. A method for rapid heating τοη tubes with at least one burner in a furnace, characterized in that the burner flame is riohtet into a drill end, the tube is heated from the inside and ale injector the exhaust gas exiting at the end of the pipe circulates by suction. 2. Vorrichtung zur Durchführung- dee Verfahrene nach Anspruch 1, bestehend aus einem tunnelfurmigen Ofen, dessen eine Stirnseite als TUr und dessen andere Stirnseite ale Kamin ausgebildet ist und in dessen Innern sich das zu erwärmende Rohr befindet, daduroh gekennzeichnet, dafl entweder in2. Device for performing the method according to claim 1, consisting of a tunnel-shaped furnace, one end of which is designed as a door and the other end of which is designed as a chimney and inside which is the one to be heated Tube is located, which is marked either in der TUr (4) oder in der Kaminvand (5) Brenner (6) installiert eind, deren Brennflammen in dae Rohrinnere gerichtet eind.The door (4) or burner (6) is installed in the chimney wall (5), the flame of which is directed into the inside of the pipe. 20.12.1968 Ba/PuDecember 20, 1968 Ba / Pu 009828/0781009828/0781 ORIGINALORIGINAL
DE19681817032 1968-12-27 1968-12-27 Tunnel furnace for rapid heating of metal pipes that are to be hot-formed Expired DE1817032C3 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE19681817032 DE1817032C3 (en) 1968-12-27 Tunnel furnace for rapid heating of metal pipes that are to be hot-formed
AT1107269A AT297076B (en) 1968-12-27 1969-11-26 Method and device for rapid heating of pipes with burners
NL6918512.A NL163267C (en) 1968-12-27 1969-12-10 TUNNULATE OVEN.
BE742967D BE742967A (en) 1968-12-27 1969-12-11
FR6943342A FR2027179A1 (en) 1968-12-27 1969-12-15
GB62584/69A GB1299186A (en) 1968-12-27 1969-12-23 Method of and apparatus for heating hollow, substantially cylindrical metal bodies by means of burners
US887520A US3620513A (en) 1968-12-27 1969-12-23 Method and machine for the rapid heating of tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681817032 DE1817032C3 (en) 1968-12-27 Tunnel furnace for rapid heating of metal pipes that are to be hot-formed

Publications (3)

Publication Number Publication Date
DE1817032A1 true DE1817032A1 (en) 1970-07-09
DE1817032B2 DE1817032B2 (en) 1977-02-24
DE1817032C3 DE1817032C3 (en) 1977-10-13

Family

ID=

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0703300A1 (en) * 1994-09-23 1996-03-27 Reynolds Wheels International Ltd. A method and equipment for bringing metal alloy ingots, billets and the like to the semisolid or semiliquid state in readiness for thixotropic forming

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0703300A1 (en) * 1994-09-23 1996-03-27 Reynolds Wheels International Ltd. A method and equipment for bringing metal alloy ingots, billets and the like to the semisolid or semiliquid state in readiness for thixotropic forming
US5665302A (en) * 1994-09-23 1997-09-09 Reynolds Wheels International Ltd. Method and equipment for bringing metal alloy ingots, billets and the like to the semisolid or semiliquid state in readiness for thixotropic forming
US5869811A (en) * 1994-09-23 1999-02-09 Reynolds Wheels International Ltd. Method and equipment for bringing metal alloy ingots, billets and the like to the semisolid or semiliquid state in readiness for thixotropic forming

Also Published As

Publication number Publication date
NL6918512A (en) 1970-06-30
AT297076B (en) 1972-03-10
BE742967A (en) 1970-05-14
FR2027179A1 (en) 1970-09-25
NL163267C (en) 1980-08-15
DE1817032B2 (en) 1977-02-24
US3620513A (en) 1971-11-16
GB1299186A (en) 1972-12-06
NL163267B (en) 1980-03-17

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
EF Willingness to grant licences
8339 Ceased/non-payment of the annual fee