US3792965A - Walking beam furnace - Google Patents
Walking beam furnace Download PDFInfo
- Publication number
- US3792965A US3792965A US00202814A US3792965DA US3792965A US 3792965 A US3792965 A US 3792965A US 00202814 A US00202814 A US 00202814A US 3792965D A US3792965D A US 3792965DA US 3792965 A US3792965 A US 3792965A
- Authority
- US
- United States
- Prior art keywords
- hearth
- walking
- walking beams
- beams
- lifting
- 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
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Classifications
-
- 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 tunnel furnace
- 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 tunnel furnace walking beam furnace
- F27B9/202—Conveyor mechanisms therefor
Definitions
- ABSTRACT A furnace of the walking beam type in which the portion of the hearth located between two walking beams can be lifted above the level assumed by the walking beams during the feeding movement in order to permit the feed of the charge to be interrupted without the necessity for stopping the feeding movement of 2 Claims, 1 Drawing Figure [5 6] References Cited UNITED STATES PATENTS 3,662,876 5/1972 Hollis 198/219 3,565,241 2/1971 Race 198/219 3,554,505 l/1971 Deimpulss ..432/122 the beams 3,567,198 3/1971 Gentry ..432/34- I13 mi l 11 1 WALKING BEAM FURNACE This invention relates to a walking beam furnace and its object is to produce a furnace at which the feed of the charges within some part of the furnace can be interrupted without requiring the feeding movements of the walking beam
- the invention is characterized in that the hearth portion located between two walking beams at least to a part of the furnace length can be lifted above the level assumed by the walking beams during the feeding movement.
- the walking beam furnace comprises a hearth zone 1 with walls 2, 3 and a roof (not shown). Beneath the hearth zone 1 a machine room 4 is located which includes the drive mechanisms 5 and 6 for the walking beams 7 and 8.
- the walking beams 7 and 8 can in a usual way carry out reciprocating movements such, that the beams in their forward movement are lifted to lift the charges 9 from the hearth plane.
- the hearth comprises four longitudinal ridges 10, 11, 12 and 13, of which the ridges 10 and 11 are located each on one side of the walking beam 8 and the ridges 12 and 13 each on one side of the walking beam 7.
- the walking beams move forwards and rear wards and, respectively, upwards and downwards, with gaps between the sides of the ridges and the outsides of the walking beams.
- the drive mechanisms 5 and 6 for the walking beams are constructed in a conventional way and will not be described in greater detail in the present invention.
- the two central ridges 11 and 12 located between the walking beams are according to the invention adapted to be lifted to a certain height above their normal position.
- the level said ridges are adapted to assume lies above the level, which the walking beams 7 and 8 can assume during their forward movement.
- the ridges 11 and 12 have been lifted to their highest level, they thereby lift the charges supported thereon, so that the walking beams do not reach up to and cannot catch the charges, which thereby remain lying on the ridges 11 and 12 and are not advanced in the furnace.
- the ridges 11 and 12, i.e., the hearth between the walking beams is formed so as to be liftable along the entire lengths of the furnace or along a part thereof, according to the effect desired.
- the hearth is lifted by means of a mechanism 14, which may include hydraulic pistons, beams or wheels against which the hearth rests.
- the operation of the liftable and lowerable hearth preferably is so controlled that the hearth is lifted immediately prior to or simultaneously with the lifting of the walking beams, and that the hearth is lowered as soon as the walking beams have been lowered.
- the charge 9 at the stay-time in a certain position in the furnace normally will abut the entire hearth and thereby be held straight. If the charge would rest only on the lifted ridges 11 and 12, this would involve the risk that the ends of the charge would be curved. It is to be observed, therefore, that the liftable and lowerable hearth is not a walking beam, but only performs an upward and downward movement without moving the charges forward in the furnace.
- the liftable and lowerable hearth can be caused to perform a certain number of lifting and lowering movements, so that the walking beams at their feeding movements actuate only those charges, which are not affected by the liftable and lowerable hearth, i.e., those charges which are located before or behind the liftable and lowerable hearth portion.
- the hearth such as to be liftable and lowerable along the entire hearth length, but this is generally not required, as it is particularly desired that the hearth in the preheating zone can be lifted between the walking beams and the charges here are given a longer stay-time.
- a walking beam furnace which comprises an elongated oven hearth
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Tunnel Furnaces (AREA)
Abstract
A furnace of the walking beam type in which the portion of the hearth located between two walking beams can be lifted above the level assumed by the walking beams during the feeding movement in order to permit the feed of the charge to be interrupted without the necessity for stopping the feeding movement of the beams.
Description
United States Patent [1 1 Bengtsson WALKING BEAM FURNACE [75] Inventor: Ake Bengtsson, Huddinge, Sweden [73] Assignee: Aktiebolaget Tabougnar,
Stockholm, Sweden [22] Filed: Nov. 29, 1971 [21] Appl. No.: 202,814
[30] Foreign Application Priority Data [58] Field of Search. 263/6 A, 6 R; 198/219; 4.32/6, 432/9, 33, 34, 45, 122, 121; 34/151 [451 Feb. 19,1974
Primary Examiner-John .l. Camby Assistant Examiner-Henry C. ,Yuen Attorney, Agent, or Firm-Pierce, Scheffler & Parker [57] ABSTRACT A furnace of the walking beam type in which the portion of the hearth located between two walking beams can be lifted above the level assumed by the walking beams during the feeding movement in order to permit the feed of the charge to be interrupted without the necessity for stopping the feeding movement of 2 Claims, 1 Drawing Figure [5 6] References Cited UNITED STATES PATENTS 3,662,876 5/1972 Hollis 198/219 3,565,241 2/1971 Race 198/219 3,554,505 l/1971 Dessants ..432/122 the beams 3,567,198 3/1971 Gentry ..432/34- I13 mi l 11 1 WALKING BEAM FURNACE This invention relates to a walking beam furnace and its object is to produce a furnace at which the feed of the charges within some part of the furnace can be interrupted without requiring the feeding movements of the walking beams to be stopped. The invention is characterized in that the hearth portion located between two walking beams at least to a part of the furnace length can be lifted above the level assumed by the walking beams during the feeding movement. An embodiment of the invention is described in the following, with reference to the accompanying drawing showing a cross-section through a walking beam furnace without showing the roof or upper portion of the invention.
The walking beam furnace comprises a hearth zone 1 with walls 2, 3 and a roof (not shown). Beneath the hearth zone 1 a machine room 4 is located which includes the drive mechanisms 5 and 6 for the walking beams 7 and 8. The walking beams 7 and 8 can in a usual way carry out reciprocating movements such, that the beams in their forward movement are lifted to lift the charges 9 from the hearth plane. In the embodiment shown, the hearth comprises four longitudinal ridges 10, 11, 12 and 13, of which the ridges 10 and 11 are located each on one side of the walking beam 8 and the ridges 12 and 13 each on one side of the walking beam 7. The walking beams move forwards and rear wards and, respectively, upwards and downwards, with gaps between the sides of the ridges and the outsides of the walking beams. The drive mechanisms 5 and 6 for the walking beams are constructed in a conventional way and will not be described in greater detail in the present invention.
The two central ridges 11 and 12 located between the walking beams are according to the invention adapted to be lifted to a certain height above their normal position. The level said ridges are adapted to assume lies above the level, which the walking beams 7 and 8 can assume during their forward movement. When, thus, the ridges 11 and 12 have been lifted to their highest level, they thereby lift the charges supported thereon, so that the walking beams do not reach up to and cannot catch the charges, which thereby remain lying on the ridges 11 and 12 and are not advanced in the furnace. The ridges 11 and 12, i.e., the hearth between the walking beams, is formed so as to be liftable along the entire lengths of the furnace or along a part thereof, according to the effect desired. The hearth is lifted by means of a mechanism 14, which may include hydraulic pistons, beams or wheels against which the hearth rests. The operation of the liftable and lowerable hearth preferably is so controlled that the hearth is lifted immediately prior to or simultaneously with the lifting of the walking beams, and that the hearth is lowered as soon as the walking beams have been lowered.
Owing to the fact that the hearth, i.e., the ridges l1 and 12, are not lifted before the lifting of the beams has taken place, the charge 9 at the stay-time in a certain position in the furnace normally will abut the entire hearth and thereby be held straight. If the charge would rest only on the lifted ridges 11 and 12, this would involve the risk that the ends of the charge would be curved. It is to be observed, therefore, that the liftable and lowerable hearth is not a walking beam, but only performs an upward and downward movement without moving the charges forward in the furnace. The hearth having been lowered to the same level as the other ridges 10 and 13, the charge in a usual way will rest over the entire hearth and can be reached by the walking beams 7 and 8 for forward movement in the furnace. According to the desired stay-time in a certain place or position in the furnace, the liftable and lowerable hearth can be caused to perform a certain number of lifting and lowering movements, so that the walking beams at their feeding movements actuate only those charges, which are not affected by the liftable and lowerable hearth, i.e., those charges which are located before or behind the liftable and lowerable hearth portion.
It is possible, of course, to design the hearth such as to be liftable and lowerable along the entire hearth length, but this is generally not required, as it is particularly desired that the hearth in the preheating zone can be lifted between the walking beams and the charges here are given a longer stay-time.
What 1 claim is:
1. A walking beam furnace, which comprises an elongated oven hearth;
a pair of walking beams disposed at opposite sides of the hearth;
means for periodically raising said walking beams above the plane of the hearth and advancing them when raised, thereby effecting forward feeding movement of a charge supported thereon and thereafter retracting and lowering said walking beams to the plane of the hearth;
at least one portion of the hearth length located between said walking beams being vertically liftable; and
means for intermittently vertically lifting said liftable portion of the hearth, during the feeding movement of said walking beams, above the level assumed by the walking beams when lifted thereby raising but not forwardly feeding charge supported on said liftable portion.
2. A walking beam furnace according to claim 1, in which said lifting means is adapted to effect lifting of said hearth portion in connection with or immediately prior to the lifting of the walking beams.
Claims (2)
1. A walking beam furnace, which comprises an elongated oven hearth; a pair of walking beams disposed at opposite sides of the hearth; means for periodically raising said walking beams above the plane of the hearth and advancing them when raised, thereby effecting forward feeding movement of a charge supported thereon and thereafter retracting and lowering said walking beams to the plane of the hearth; at least one portion of the hearth length located between said walking beams being vertically liftable; and means for intermittently vertically lifting said liftable portion of the hearth, during the feeding movement of said walking beams, above the level assumed by the walking beams when lifted thereby raising but not forwardly feeding charge supported on said liftable portion.
2. A walking beam furnace according to claim 1, in which said lifting means is adapted to effect lifting of said hearth portion in connection with or immediately prior to the lifting of the walking beams.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1617970 | 1970-11-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3792965A true US3792965A (en) | 1974-02-19 |
Family
ID=20301837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00202814A Expired - Lifetime US3792965A (en) | 1970-11-30 | 1971-11-29 | Walking beam furnace |
Country Status (5)
Country | Link |
---|---|
US (1) | US3792965A (en) |
DE (1) | DE2159109A1 (en) |
ES (1) | ES397534A1 (en) |
FR (1) | FR2116136A5 (en) |
GB (1) | GB1314670A (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4009774A (en) * | 1972-11-07 | 1977-03-01 | Lutz David E | Conveyor |
US4116619A (en) * | 1977-05-26 | 1978-09-26 | Btu Engineering Corporation | Multiple beam furnace |
EP0007464A1 (en) * | 1978-07-15 | 1980-02-06 | Smit Ovens Nijmegen B.V. | Walking-beam type furnace with supporting plates |
US4212633A (en) * | 1978-11-16 | 1980-07-15 | Abar Corporation | Vacuum electric furnace |
US4217095A (en) * | 1977-05-23 | 1980-08-12 | Tetsuya Tokitsu | Reheating furnace for use in a hot rolling line |
US4585411A (en) * | 1983-07-06 | 1986-04-29 | Italimpianti Societa Italiana Impianti P.A. | Method and walking beam furnace for the intermediate heating of pipes in hot rolling mills |
US4828489A (en) * | 1986-12-30 | 1989-05-09 | Francesco Albonetti | High speed firing method and kiln, in particular for ceramic materials such as tiles and the like |
DE3843002A1 (en) * | 1988-12-08 | 1990-06-13 | Didier Eng | Method and heating furnace for heating billets, ingots, slabs, sheets and similar products to be heated |
US4975048A (en) * | 1988-08-16 | 1990-12-04 | Sharp Kabushiki Kaisha | Heating apparatus |
EP0412421A2 (en) * | 1989-08-08 | 1991-02-13 | Pacesetter AB | Self-oscillating transmitter |
US5139418A (en) * | 1990-03-13 | 1992-08-18 | Stein Heurtey | Device for discharging and transferring steelworks products |
DE4411216A1 (en) * | 1994-03-31 | 1995-10-05 | Loi Ind Ofenanlagen | Travelling furnace kiln |
CN101586917B (en) * | 2008-05-21 | 2012-07-04 | 通化钢铁股份有限公司 | Cooling water beams of heating furnace |
US20130157210A1 (en) * | 2009-10-20 | 2013-06-20 | Tubos De Acero De Mexico, S.A. | Device and method for transversely moving tubular material inside a furnace |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3633374A1 (en) * | 1986-10-01 | 1988-04-14 | Ruhrgas Ag | SIMPLE STEPS FOR HEAT TREATMENT OF SHEETS |
IT1227500B (en) * | 1988-11-25 | 1991-04-12 | Heurtey Italiana Spa | HEATING OVEN, MAINTENANCE AND STORAGE OF STEEL PRODUCTS. |
IT1248166B (en) * | 1991-05-21 | 1995-01-05 | Danieli Off Mecc | REFRACTORY LONGHERONI OVEN WITH CENTRAL LOADING FOR HEATING AND ACCUMULATION OF HOT PRODUCTS. |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1761199A (en) * | 1926-09-18 | 1930-06-03 | Libbey Owens Glass Co | Sheet-glass-handling apparatus |
US2875995A (en) * | 1956-01-17 | 1959-03-03 | Ferguson Equipment Corp | Heat treating furnace |
FR1206789A (en) * | 1958-05-16 | 1960-02-11 | Stein & Roubaix | Improvements to deck ovens |
US3373980A (en) * | 1966-02-28 | 1968-03-19 | Tabougnar Ab | Walking beam furnace for effecting different feed speeds of the charge |
US3450394A (en) * | 1967-01-30 | 1969-06-17 | Salem Brosius Canada Ltd | Walking beam furnace |
US3480264A (en) * | 1967-01-31 | 1969-11-25 | Koppers Wistra Ofenbau Gmbh | Metallurgical walking beam furnace |
US3544094A (en) * | 1967-04-15 | 1970-12-01 | Koppers Wistra Ofenbau Gmbh | Metallurgical walking beam furnace |
US3554505A (en) * | 1967-12-20 | 1971-01-12 | Heurtey Sa | Walking beam furnaces |
US3565241A (en) * | 1968-10-07 | 1971-02-23 | Clark Automation Inc | Walking beam transfer apparatus |
US3567198A (en) * | 1969-11-14 | 1971-03-02 | Granco Equipment | Retriever means for walking beam furnace |
US3662876A (en) * | 1969-09-12 | 1972-05-16 | Newall Eng | Conveyor systems |
-
1971
- 1971-11-29 FR FR7142626A patent/FR2116136A5/fr not_active Expired
- 1971-11-29 US US00202814A patent/US3792965A/en not_active Expired - Lifetime
- 1971-11-29 DE DE19712159109 patent/DE2159109A1/en not_active Withdrawn
- 1971-11-30 ES ES397534A patent/ES397534A1/en not_active Expired
- 1971-11-30 GB GB5551971A patent/GB1314670A/en not_active Expired
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1761199A (en) * | 1926-09-18 | 1930-06-03 | Libbey Owens Glass Co | Sheet-glass-handling apparatus |
US2875995A (en) * | 1956-01-17 | 1959-03-03 | Ferguson Equipment Corp | Heat treating furnace |
FR1206789A (en) * | 1958-05-16 | 1960-02-11 | Stein & Roubaix | Improvements to deck ovens |
US3373980A (en) * | 1966-02-28 | 1968-03-19 | Tabougnar Ab | Walking beam furnace for effecting different feed speeds of the charge |
US3450394A (en) * | 1967-01-30 | 1969-06-17 | Salem Brosius Canada Ltd | Walking beam furnace |
US3480264A (en) * | 1967-01-31 | 1969-11-25 | Koppers Wistra Ofenbau Gmbh | Metallurgical walking beam furnace |
US3544094A (en) * | 1967-04-15 | 1970-12-01 | Koppers Wistra Ofenbau Gmbh | Metallurgical walking beam furnace |
US3554505A (en) * | 1967-12-20 | 1971-01-12 | Heurtey Sa | Walking beam furnaces |
US3565241A (en) * | 1968-10-07 | 1971-02-23 | Clark Automation Inc | Walking beam transfer apparatus |
US3662876A (en) * | 1969-09-12 | 1972-05-16 | Newall Eng | Conveyor systems |
US3567198A (en) * | 1969-11-14 | 1971-03-02 | Granco Equipment | Retriever means for walking beam furnace |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4009774A (en) * | 1972-11-07 | 1977-03-01 | Lutz David E | Conveyor |
US4217095A (en) * | 1977-05-23 | 1980-08-12 | Tetsuya Tokitsu | Reheating furnace for use in a hot rolling line |
US4116619A (en) * | 1977-05-26 | 1978-09-26 | Btu Engineering Corporation | Multiple beam furnace |
EP0007464A1 (en) * | 1978-07-15 | 1980-02-06 | Smit Ovens Nijmegen B.V. | Walking-beam type furnace with supporting plates |
US4212633A (en) * | 1978-11-16 | 1980-07-15 | Abar Corporation | Vacuum electric furnace |
US4585411A (en) * | 1983-07-06 | 1986-04-29 | Italimpianti Societa Italiana Impianti P.A. | Method and walking beam furnace for the intermediate heating of pipes in hot rolling mills |
US4828489A (en) * | 1986-12-30 | 1989-05-09 | Francesco Albonetti | High speed firing method and kiln, in particular for ceramic materials such as tiles and the like |
US4975048A (en) * | 1988-08-16 | 1990-12-04 | Sharp Kabushiki Kaisha | Heating apparatus |
DE3843002A1 (en) * | 1988-12-08 | 1990-06-13 | Didier Eng | Method and heating furnace for heating billets, ingots, slabs, sheets and similar products to be heated |
EP0412421A2 (en) * | 1989-08-08 | 1991-02-13 | Pacesetter AB | Self-oscillating transmitter |
EP0412421A3 (en) * | 1989-08-08 | 1991-09-11 | Siemens Elema Ab | Self-oscillating transmitter |
US5139418A (en) * | 1990-03-13 | 1992-08-18 | Stein Heurtey | Device for discharging and transferring steelworks products |
DE4411216A1 (en) * | 1994-03-31 | 1995-10-05 | Loi Ind Ofenanlagen | Travelling furnace kiln |
DE4411216B4 (en) * | 1994-03-31 | 2005-03-24 | Loi Thermprocess Gmbh | Walking beam furnace |
CN101586917B (en) * | 2008-05-21 | 2012-07-04 | 通化钢铁股份有限公司 | Cooling water beams of heating furnace |
US20130157210A1 (en) * | 2009-10-20 | 2013-06-20 | Tubos De Acero De Mexico, S.A. | Device and method for transversely moving tubular material inside a furnace |
US9127887B2 (en) * | 2009-10-20 | 2015-09-08 | Tubos De Acero De Mexico, S.A. | Device and method for transversely moving tubular material inside a furnace |
Also Published As
Publication number | Publication date |
---|---|
FR2116136A5 (en) | 1972-07-07 |
DE2159109A1 (en) | 1972-05-31 |
GB1314670A (en) | 1973-04-26 |
ES397534A1 (en) | 1975-03-16 |
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