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US3887064A - Walking beam conveyor in a furnace - Google Patents

Walking beam conveyor in a furnace Download PDF

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Publication number
US3887064A
US3887064A US410238A US41023873A US3887064A US 3887064 A US3887064 A US 3887064A US 410238 A US410238 A US 410238A US 41023873 A US41023873 A US 41023873A US 3887064 A US3887064 A US 3887064A
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US
United States
Prior art keywords
work
beams
supporting
heat tunnel
uppermost position
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
US410238A
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English (en)
Inventor
Heinz Brockmann
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.)
BROBU INDUSTRIE OFENBAU
Brobu Industrie-Ofenbau & Co KG GmbH
Original Assignee
BROBU INDUSTRIE OFENBAU
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 BROBU INDUSTRIE OFENBAU filed Critical BROBU INDUSTRIE OFENBAU
Application granted granted Critical
Publication of US3887064A publication Critical patent/US3887064A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F27B9/202—Conveyor mechanisms therefor
    • F27B9/205—Conveyor mechanisms therefor having excentrics or lever arms

Definitions

  • ABSTRACT A furnace having an elongated heat tunnel through which work passes to be heated therein.
  • a pair of vertically reciprocally movable sets of beams extends longitudinally of the heat tunnel and forms a surface for supporting the work.
  • At least one set of beams is simultaneously movable in the transport direction, and one set of beams is at all times situated at maximum vertical height so that the work moves only horizontally through the furnace.
  • the invention relates to a walking beam conveyor structure for heating work travelling through a heat furnace or tunnel having at least two sets of beams vertically reciprocally movably mounted to move the work in a feed direction through the heat tunnel or furnace.
  • Such walking beam conveyors in heat tunnels and furnaces are already known; these walking beam conveyors have generally, in addition to a set of movable beams, a set of stationary beams. The work is moved through the furnace or tunnel in a stepwise manner by the movable set of beams.
  • the work is transported by means of a first set of beams lifting the work off the second set of stationary beams, and again depositing the work on the stationary beams at a horizontal distance from the position at which the work was lifted off the stationary beams, and the movable set of beams then return to this lifting-off position.
  • the heating of the work produces a layer of scales which is destroyed by the constant lifting and lowering of the work.
  • This causes the scales to fall between the stationary and movable beams and can easily cause a malfunctioning of the movable beams driving means unless the scales are removed periodically which causes frequent down-times of the entire installation.
  • scales accumulate on the movable and stationary beams and cause the work pieces to be unevenly supported thereon.
  • this object is attained by having at least one set of beams at its highest vertical position at all times during the movement of the work through the furnace or tunnel.
  • the supporting beams of each set then take over the work from the other set of supporting beams.
  • the work thus taken over by one set of supporting beams or one supporting beam is transported horizontally without undergoing any vertical movement in the transport direction through the oven or furnace, a horizontal distance corresponding to one operational cycle of the apparatus.
  • the apparatus transports the work through the oven or furnace without lifting or lowering the work.
  • the supporting beams of the prior art walking beam conveyors, on the other band do undergo vertical as well as horizontal movements.
  • the fact that the work does not undergo any vertical movement as it travels through the furnace reduces the amount of scales produced in a walking beam conveyor, and also reduces the wear of the supporting beams.
  • the output of the driving mechanism for lifting and lowering the supporting beams can be substantially smaller, since the movement of the work in the vertical direction is eliminated.
  • the supporting beams are moved reciprocally without imparting the horizontal movement in the transportation direction to the work pieces, and are reciprocally moved in the vertical direction only while maintaining the work pieces at all times at the same height.
  • the alternate contacting of the work piece by the two sets of supporting beams produces a temperature equalization between the two contacting surfaces of the work piece and the two sets of supporting beams respectively, on the one hand, and the remainder of the surface of the work piece, on the other hand.
  • the supporting beams are formed preferably as supporting bridges, having water-cooled pipes.
  • the supporting beams are formed from special fire clay material and can be moved completely or partially outwardly of the furnace for waiting or taking over work from preconnected transportation and conveying means.
  • FIG. 1 illustrates a cross-sectional, elevational view of a first embodiment of a walking beam conveyor in a furnace, which is adapted for the heating from above and below of work being transported through the furnace;
  • FIG. 2 is a cross-sectional, elevational view of a second embodiment of the invention wherein the walking beam conveyor in the furnace is illustrated, which is adapted for heating the work pieces being transported therethrough only from above.
  • the oven grate consists of the supporting beams 2 and 3, having water-cooled pipes 10 which extend in the transportation direction of the oven.
  • the beams 2 and 3 are mounted on separate supporting structures.
  • the supporting structure for the beams 3 can also impart onto the supporting beams 3 a movement in the transportation direction of the oven.
  • the supporting beams 2 are mounted on supporting structure 4 which is reciprocally, vertically movable by means of the lifting mechanism 5.
  • the supporting beams 3 are also rigidly mounted on a supporting structure 6, while the supporting structure 4 is not horizontally movable; the supporting structure 6 has this additional horizontal moving capability by virtue of the rollers 7 on which the supporting structure 6 is movably mounted.
  • the rollers 7 are themselves reciprocally, vertically movable by means of a lifting mechanism 3. All of the gaps present in the floor of the oven are sealed off by means of water-seals 9, so that the lower space of the oven remains relatively cool.
  • the supporting beams 2 and 3 are alternately raised and lowered.
  • One set of beams remains at the uppermost vertical position until the other set of beams have reached their uppermost vertical position.
  • the work pieces Due to the horizontal movement of the supporting beams 3, the work pieces are moved through the oven in a horizontal direction at the level of the uppermost vertical position of the supporting beams. After a horizontal step-wise movement has been carried out by the supporting beams 3, the latter after supporting beams 2 have reached the uppermost vertical position, can re turn to their starting position.
  • the supporting beams 2 and 3 are alternately raised and lowered to effect temperature equalization between the contacting surfaces with the supporting beams 2 and 3 and a work piece, on the one hand, and the remainder of the surfaces of the work piece, on the other hand.
  • the interruption of the work piece movement can be caused by employing different conventional commonly adjusted driving mechanisms, which by switching off the driving means for the supporting beams 3 for moving these beams in a horizontal direction, can thereby produce a vertical reciprocal movement only of the supporting beams 2 and 3 by maintaining the operation of the vertical movement driving means for the supporting beams 2 and 3.
  • FIG. 2 illustrates a walking beams conveyor in a fur nace 11, wherein the work is only heated from above in the oven 1.
  • the driving means for the oven can have a cover made of a special fire clay material and thus the beams do not require water-cooling means. Consequently, the supporting beams in FIG. 2 are designated with the reference numeral 30 because they are formed differently than the supporting beams 2 and 3 of FIG. 1.
  • the embodiment of FIG. 2 corresponds in every other respect to the embodiment of FIG. 1.
  • the individual parts of FIG. 2 are therefore designated with the same reference numbers as the corresponding parts of FIG. 1.
  • the supporting beams 2 can also be provided with a driving mechanism for moving them in a horizontal direction. If the supporting beams 3 are only movable in a horizontal direction, the work piece is moved horizontally through the oven in a step-wise manner with intermittent periods of rest, and intermittent periods of horizontal movements. If, on the other hand, the supporting beams 3 are also movable in a horizontal direction, the work piece is moved through the oven 1 in a continuous quasi-uniform movement and of course, the work piece travels more quickly through the oven.
  • a heat tunnel having a walking beam conveyor arrangement for transporting work through said heat tunnel in a horizontal feed direction
  • the conveyor arrangement comprises, in combination, a first vertically reciprocable work-supporting beam, a second horizontally reciprocable work-supporting beam, each of the first and second beams having a substantially horizontal work-contacting surface, and actuating means for relatively moving the first and second beams in timed relation in alternate engagement with the work to advance the work through the heat tunnel
  • the improvement wherein the second beam is provided with facilities for vertical reciprocation to a height chosen such that the uppermost position of its work-supporting surface is substantially level with the uppermost position of the work-supporting surface of the first beam
  • the actuating means includes facilities for maintaining the work-supporting surface of each of the first and second beams in its uppermost position when in contact with the work.
  • the walking beam conveyor arrangement as set forth in claim 1, wherein said actuating means are adapted to be selectively disconnected from said first beam so that said first and second beams only move vertically reciprocally and the movement of the work in the feed direction through said heat tunnel is thereby interrupted.
  • the walking beam conveyor arrangement as set forth in claim 2, including watercooling means operatively connected to each said first and second beams for cooling the associated workcontacting surface.
  • the walking beam conveyor arrangement as set forth in claim 2, wherein said first and second beams are at least partially movable outside of said heat tunnel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Resistance Heating (AREA)
US410238A 1972-10-30 1973-10-26 Walking beam conveyor in a furnace Expired - Lifetime US3887064A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2253105A DE2253105A1 (de) 1972-10-30 1972-10-30 Durchlaufofen mit senkbalkenfoerderer

Publications (1)

Publication Number Publication Date
US3887064A true US3887064A (en) 1975-06-03

Family

ID=5860384

Family Applications (1)

Application Number Title Priority Date Filing Date
US410238A Expired - Lifetime US3887064A (en) 1972-10-30 1973-10-26 Walking beam conveyor in a furnace

Country Status (8)

Country Link
US (1) US3887064A (sv)
JP (1) JPS4977245A (sv)
AT (1) AT345874B (sv)
BE (1) BE802828A (sv)
DE (1) DE2253105A1 (sv)
FR (1) FR2205184A5 (sv)
IT (1) IT996148B (sv)
SE (1) SE393400B (sv)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3993432A (en) * 1975-12-15 1976-11-23 Lee Wilson Engineering Of Canada Cleaning device for walking beam furnace
US4212633A (en) * 1978-11-16 1980-07-15 Abar Corporation Vacuum electric furnace
US4648837A (en) * 1984-11-02 1987-03-10 Italimpianti S.P.A. Walking beam furnace
US4741695A (en) * 1985-08-09 1988-05-03 Chugai Ro Co., Ltd. Walking beam type reheating furnace
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
US4838785A (en) * 1988-07-05 1989-06-13 Cameron Forge Company Walking beam furnace insulation
US4863376A (en) * 1987-02-24 1989-09-05 Italimpianti S.P.A. Walking beam furnace
US4919254A (en) * 1988-02-01 1990-04-24 Bricmont & Associates, Inc. Walking beam apparatus and method
US4975048A (en) * 1988-08-16 1990-12-04 Sharp Kabushiki Kaisha Heating apparatus
US5139418A (en) * 1990-03-13 1992-08-18 Stein Heurtey Device for discharging and transferring steelworks products
WO1994008189A1 (en) * 1992-10-01 1994-04-14 Btu International Walking hearth furnace
WO2018019920A1 (en) * 2016-07-28 2018-02-01 Autotech Engineering, Aie Conveying through furnaces
US20210246525A1 (en) * 2020-02-10 2021-08-12 Benteler Automobiltechnik Gmbh Furnace for partially heating metal components

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2056070A (en) * 1933-11-15 1936-09-29 Paul S Menough Heating furnace
US3450394A (en) * 1967-01-30 1969-06-17 Salem Brosius Canada Ltd Walking beam furnace
US3512628A (en) * 1968-07-09 1970-05-19 Multifastener Corp Walking beam conveyor and method
US3633885A (en) * 1970-03-20 1972-01-11 Btu Eng Corp Movable hearth furnace
US3749550A (en) * 1971-12-16 1973-07-31 Loftus Engineering Corp Walking beam furnace

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2056070A (en) * 1933-11-15 1936-09-29 Paul S Menough Heating furnace
US3450394A (en) * 1967-01-30 1969-06-17 Salem Brosius Canada Ltd Walking beam furnace
US3512628A (en) * 1968-07-09 1970-05-19 Multifastener Corp Walking beam conveyor and method
US3633885A (en) * 1970-03-20 1972-01-11 Btu Eng Corp Movable hearth furnace
US3749550A (en) * 1971-12-16 1973-07-31 Loftus Engineering Corp Walking beam furnace

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3993432A (en) * 1975-12-15 1976-11-23 Lee Wilson Engineering Of Canada Cleaning device for walking beam furnace
US4212633A (en) * 1978-11-16 1980-07-15 Abar Corporation Vacuum electric furnace
US4648837A (en) * 1984-11-02 1987-03-10 Italimpianti S.P.A. Walking beam furnace
US4741695A (en) * 1985-08-09 1988-05-03 Chugai Ro Co., Ltd. Walking beam type reheating furnace
US4820150A (en) * 1985-08-09 1989-04-11 Chugai Ro Co., Ltd. Walking beam type reheating furnace
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
US4863376A (en) * 1987-02-24 1989-09-05 Italimpianti S.P.A. Walking beam furnace
US4919254A (en) * 1988-02-01 1990-04-24 Bricmont & Associates, Inc. Walking beam apparatus and method
US4838785A (en) * 1988-07-05 1989-06-13 Cameron Forge Company Walking beam furnace insulation
US4975048A (en) * 1988-08-16 1990-12-04 Sharp Kabushiki Kaisha Heating apparatus
US5139418A (en) * 1990-03-13 1992-08-18 Stein Heurtey Device for discharging and transferring steelworks products
WO1994008189A1 (en) * 1992-10-01 1994-04-14 Btu International Walking hearth furnace
US5314330A (en) * 1992-10-01 1994-05-24 Btu International Walking hearth furnace
WO2018019920A1 (en) * 2016-07-28 2018-02-01 Autotech Engineering, Aie Conveying through furnaces
CN109564064A (zh) * 2016-07-28 2019-04-02 自动工程公司 传送通过炉
CN109564064B (zh) * 2016-07-28 2020-12-25 自动工程有限公司 传送通过炉
US11293695B2 (en) 2016-07-28 2022-04-05 Autotech Engineering S.L. Conveying through furnaces
US20210246525A1 (en) * 2020-02-10 2021-08-12 Benteler Automobiltechnik Gmbh Furnace for partially heating metal components
US11788164B2 (en) * 2020-02-10 2023-10-17 Benteler Automobiltechnik Gmbh Furnace for partially heating metal components

Also Published As

Publication number Publication date
ATA611073A (de) 1977-01-15
JPS4977245A (sv) 1974-07-25
FR2205184A5 (sv) 1974-05-24
DE2253105A1 (de) 1974-05-09
IT996148B (it) 1975-12-10
AT345874B (de) 1978-10-10
BE802828A (fr) 1973-11-16
SE393400B (sv) 1977-05-09

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