DE1817032A1 - Method and device for rapid heating of pipes with burners - Google Patents
Method and device for rapid heating of pipes with burnersInfo
- 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
Links
- 238000000034 method Methods 0.000 title claims description 12
- 238000010438 heat treatment Methods 0.000 title claims description 10
- 239000002737 fuel gas Substances 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 241000024188 Andala Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 238000009785 tube rolling Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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
- C21D9/08—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
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/ΐΐΓDecember 9, 1968
Ba / ΐΐΓ
009828/0 7 81 BAD009828/0 7 81 BA D
«•ι..«• ι ..
Claims (1)
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)
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)
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 |