EP0536521A1 - Four à longerons mobiles - Google Patents
Four à longerons mobiles Download PDFInfo
- Publication number
- EP0536521A1 EP0536521A1 EP92114498A EP92114498A EP0536521A1 EP 0536521 A1 EP0536521 A1 EP 0536521A1 EP 92114498 A EP92114498 A EP 92114498A EP 92114498 A EP92114498 A EP 92114498A EP 0536521 A1 EP0536521 A1 EP 0536521A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- walking beam
- support
- webs
- fixed
- furnace according
- 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
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Classifications
-
- 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
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/02—Skids or tracks for heavy objects
- F27D3/022—Skids
- F27D3/024—Details of skids, e.g. riders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path
- F27B9/201—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path walking beam furnace
Definitions
- the invention relates to a walking beam furnace with fixed beams and walking beams arranged in a housing with its longitudinal axis parallel to the feed direction.
- Walking beam furnaces and pacemaker furnaces have long been known for conveying annealing material, in particular slabs during annealing. They are preferred for use in rolling mills because they have a more uniform heating and damage-free transport of the annealing material than e.g. B. ensure push furnaces.
- the annealing material When transported through the furnace, the annealing material is deposited on the fixed beam for a few minutes after each stroke. On the one hand, these transport breaks allow the annealing material to remain sufficiently in the furnace and, on the other hand, the lifting beams return to their lowered starting position. Since the shape and load-bearing capacity of the lifting and fixed beams must be preserved even at high furnace temperatures, they usually consist of pipes through which coolant flows. When the annealing material remains on the cooled fixed beam, however, temperature differences of up to 150 ° C, so-called cooling shadows, occur at the contact points of the annealing material.
- Differences in temperature of the annealing material affect the Surface quality, the dimensional accuracy and the technological properties of the annealing material, so that the rolling mill strives to reduce the inevitable temperature differences in the annealing material to below 30 ° C.
- German Offenlegungsschrift 34 40 126 describes a continuous furnace in which the beam sections essentially having a common longitudinal axis alternately consist of fixed beam sections and walking beam sections, and the fixed beam sections following the first fixed beam section are angled laterally at their ends facing the beginning of the furnace and are guided past the adjacent walking beam sections are.
- This known walking beam has proven itself, but still results in cooling shadows which should be reduced as much as possible in the case of particularly high demands on the quality of the finished product produced from the annealing material.
- the invention has for its object to improve the walking beam furnace of the type mentioned in such a way that on the individual lifting and fixed beams change in the feed direction support point of the annealing material, without it being necessary, the dimensions of the fixed beams and walking beams and their Change distances in order not to have to accept restrictions on the dimensions of the annealing material to be charged.
- a walking beam of the type mentioned that, according to the invention, supporting webs extending at an angle to the longitudinal axis are attached to the walking beam and / or the fixed beam. These supporting webs are so narrow that they only run obliquely across the width of the lifting or fixed beams, but this results in a sufficient displacement of the support points, which leads to a more uniform temperature distribution in the annealing material.
- several successive supporting webs can be attached to a walking beam and / or fixed beam, so that there is a relatively large angle for the supporting webs and thus the support points change to a sufficiently large extent with each step.
- Successive support webs can be at the same angle to the longitudinal axis and adjacent ends of the support webs can be offset from one another in the longitudinal axis.
- successive support webs can have the same or different, oppositely directed angles to the longitudinal axis and can adjoin adjacent ends of the support webs.
- both the walking beam and the fixed beam can be divided into sections in the feed direction and alternating walking beam and fixed beam sections in the longitudinal axis.
- This arrangement allows the support points to be moved in addition to the walking achieved by the sloping supporting webs, with the alternating of the walking beam and fixed beam sections making it possible to achieve relatively large distances between the cooling shadows, which in addition are the smaller values that result from the result in inclined supporting webs, to move back and forth.
- the lifting and fixed beams or sections can advantageously consist of cooled pipes, on the upper side of which an axial longitudinal web with lateral locking projections is welded.
- the supporting webs can accordingly have at least at their end areas overlapping the longitudinal webs support feet, at least one of the support feet at one end area having projections underneath the locking projections.
- the longitudinal webs thus serve to hold the supporting webs, which are secured by the extensions engaging under the locking projections.
- each support web can also have a support foot that extends across the longitudinal webs in the center, with the longitudinal web in the region of the central support foot and / or a support foot at one end region protruding laterally, protruding into the region of the support feet, to prevent longitudinal displacement Projections can be arranged. While the locking projections are intended to prevent the supporting webs from falling or tipping over from the longitudinal webs, the further projections serve to prevent longitudinal displacement.
- the supporting webs can therefore be placed in a simple manner on the lifting or fixed beams by first placing and displacing a somewhat inclined supporting web with a support foot at one end region such that this support foot has the corresponding locking projections engages, after which the obliquely held supporting web is lowered, so that the central support foot and / or a support foot at the other end region in the longitudinal direction is enclosed on both sides by the projections preventing the longitudinal displacement.
- each supporting web consists of a straight part which connects the supporting feet and rests on the corresponding longitudinal web and a part which projects vertically from it, in each case obliquely from one supporting foot side at one end to the other support foot side at the other end extending support part. In this way, the supporting web is given considerable structural strength, which can carry high loads with little material.
- each support part consists of end regions parallel to the longitudinal web in the region of the end support feet and an oblique intermediate region connecting these end regions.
- a further measure for reducing the temperature differences in the area of the cooling shadows contributes to the fact that the lifting and fixed beams or sections have a highly heat-resistant insulation which only leaves the upper area of the supporting webs free.
- a walking beam furnace 1 essentially consists of a fire-proof housing 2 with ceiling and side burners 3.
- Continuous fixed beams 4 and continuous walking beams 5 are shown in the upper half of FIG. 1. Both are supported on the furnace floor with uprights (not shown). With regard to these details and the drive of the walking beam 4, reference is made to German Offenlegungsschrift 34 40 126.
- Fig. 1 fixed and walking beams are shown, which are divided into fixed beam sections 6 to 9 and walking beam sections 10 to 13. These sections 6 to 9 and 10 to 13 become shorter towards the end of the furnace, so that the points of contact change more frequently in the direction of transport.
- the fixed beam sections 7, 8, 9 following the first fixed beam section 6 are cranked on one side, so that their end facing the beginning of the furnace laterally passes the adjacent walking beam sections 10, 11, 12 and so the freedom of movement of the walking beam sections 10 to 13 and the full load capacity of the fixed beam sections 6 to 9 is guaranteed.
- the fixed beam sections 6 to 9 and the walking beam sections 10 to 13 alternate with one another in the feed direction in the longitudinal axis.
- the fixed beam sections 6 to 9 and the walking beam sections 10 to 13 are alternately arranged in the longitudinal axis, an additional compensation of the temperature difference is achieved, since the annealing material rests on the walking beam sections 10 to 13 only during transport, on the fixed beam sections 6 to 9 lingers for a long time.
- the angle of the supporting webs 14 to the longitudinal axis can in each case be the same and the same direction, it may be necessary for structural reasons when arranging the supporting webs 14 on the fixed beam sections 6 to 9 and the walking beam sections 10 to 13 some consecutive support webs 14 provide the same or different, but opposite angle to the longitudinal axis, so that adjacent ends of the support webs 14 in this Bump area together.
- the fixed beams 4, the walking beams 5 and the fixed beam sections 6 to 9 and the walking beam sections 10 to 13 consist of horizontal, cooled tubes 15, on the upper side of which an axial longitudinal web 16 is welded.
- This axial longitudinal web 16 serves as a holder for the supporting webs 14.
- Latching projections 17, 18 are welded to the axial longitudinal webs 16 at regular intervals.
- the supporting webs 14 have support feet 19, 21 in the end regions and a further support foot 20 approximately in the middle. These support feet 19 to 21 overlap the longitudinal web 16, the support foot 19 having lower, lateral extensions 22 which engage under the locking projections 17.
- the locking projections 18 are arranged in the region of the central support foot 20 and are in each case on opposite sides of this support foot 20.
- the locking projections 17 serve to prevent lifting of the supporting web 14 from the longitudinal web 16, while the locking projections 18 block a longitudinal displacement of the supporting web 14.
- a support web 14 can be placed obliquely with its support foot 19 over the longitudinal web 16 so that it engages over it and can be moved axially until the lateral locking projections 17 are gripped by the extensions 22. If the support web 14 is now completely lowered onto the longitudinal web 16, the support foot 20 reaches the area between the latching projections 18 and is thereby axially fixed. The supporting web 14 is now secured against axial displacement as well as against falling and tipping over from the longitudinal web 16.
- Each support web 14 has a straight part 23 resting on the longitudinal web 16, which connects the support feet 19, 20, 21 to one another.
- the end regions 25, 26 and the intermediate region 27 form the support part 24 on the support web 14.
- the distance between the end region 25 and the end region 26 is approximately in the order of magnitude of the diameter of the cooled tube 15, so that due to the oblique course of the supporting part 24 of the supporting webs 14 there is no increase in the dimensions of the fixed beams 4 and walking beams 5 or 5 the fixed beam sections 6 to 9 and walking beam sections 10 to 13 enter.
- the cooling tube 15 can be coated with a highly heat-resistant insulation 28, from which only the supporting part 24 of the supporting webs 14 protrudes, so that the tubes 15 are not excessively heated and the annealing material is cooled only in the area of the bearing surface on the supporting parts 24. This also helps to reduce the temperature difference in the cooling shadow of the annealing material.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4133698 | 1991-10-11 | ||
| DE19914133698 DE4133698A1 (de) | 1991-10-11 | 1991-10-11 | Hubbalkenofen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0536521A1 true EP0536521A1 (fr) | 1993-04-14 |
| EP0536521B1 EP0536521B1 (fr) | 1997-07-23 |
Family
ID=6442495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19920114498 Expired - Lifetime EP0536521B1 (fr) | 1991-10-11 | 1992-08-26 | Four à longerons mobiles |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0536521B1 (fr) |
| CA (1) | CA2077137A1 (fr) |
| DE (1) | DE4133698A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0660061A1 (fr) * | 1993-12-21 | 1995-06-28 | TECHINT ITALIMPIANTI DEUTSCHLAND GmbH | Four à longerons mobiles |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19504633A1 (de) | 1994-08-19 | 1996-02-22 | Macgregor Conver Gmbh | Kuppelstück zur lösbaren Verbindung von Containern |
| DE102018129446B4 (de) * | 2018-11-22 | 2024-03-14 | Saint-Gobain Industriekeramik Rödental GmbH | Balken für Balkenförderofen |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR585475A (fr) * | 1924-09-06 | 1925-03-02 | Friedrich Siemens A G | Rail de glissement à refroidissement d'eau pour fours à réchauffer |
| DE3434356A1 (de) * | 1984-09-19 | 1985-02-21 | Engels, Paul, 4030 Ratingen | Aufsatzstuecke fuer gekuehlte tragrohre |
| FR2569262A1 (fr) * | 1984-08-17 | 1986-02-21 | Stein Heurtey | Four a longerons mobiles pour le rechauffage de produits siderurgiques |
| EP0183955A2 (fr) * | 1984-11-02 | 1986-06-11 | ITALIMPIANTI Società Italiana Impianti p.a. | Four à longerons mobiles |
| DE8901064U1 (de) * | 1989-02-01 | 1989-04-20 | Reining Heisskühlung GmbH & Co. KG, 4330 Mülheim | Aufsatzstück für kühlmitteldurchströmte Tragrohre in Wärmeöfen, insbesondere Hubbalkenöfen |
-
1991
- 1991-10-11 DE DE19914133698 patent/DE4133698A1/de active Pending
-
1992
- 1992-08-26 EP EP19920114498 patent/EP0536521B1/fr not_active Expired - Lifetime
- 1992-08-28 CA CA 2077137 patent/CA2077137A1/fr not_active Abandoned
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR585475A (fr) * | 1924-09-06 | 1925-03-02 | Friedrich Siemens A G | Rail de glissement à refroidissement d'eau pour fours à réchauffer |
| FR2569262A1 (fr) * | 1984-08-17 | 1986-02-21 | Stein Heurtey | Four a longerons mobiles pour le rechauffage de produits siderurgiques |
| DE3434356A1 (de) * | 1984-09-19 | 1985-02-21 | Engels, Paul, 4030 Ratingen | Aufsatzstuecke fuer gekuehlte tragrohre |
| WO1986001884A1 (fr) * | 1984-09-19 | 1986-03-27 | Ruhrgas Aktiengesellschaft | Systeme porteur et supports pour produits chauffees |
| EP0183955A2 (fr) * | 1984-11-02 | 1986-06-11 | ITALIMPIANTI Società Italiana Impianti p.a. | Four à longerons mobiles |
| DE8901064U1 (de) * | 1989-02-01 | 1989-04-20 | Reining Heisskühlung GmbH & Co. KG, 4330 Mülheim | Aufsatzstück für kühlmitteldurchströmte Tragrohre in Wärmeöfen, insbesondere Hubbalkenöfen |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0660061A1 (fr) * | 1993-12-21 | 1995-06-28 | TECHINT ITALIMPIANTI DEUTSCHLAND GmbH | Four à longerons mobiles |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2077137A1 (fr) | 1993-04-12 |
| DE4133698A1 (de) | 1993-04-15 |
| EP0536521B1 (fr) | 1997-07-23 |
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