US3791535A - Furnace moving system - Google Patents

Furnace moving system Download PDF

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Publication number
US3791535A
US3791535A US00320141A US3791535DA US3791535A US 3791535 A US3791535 A US 3791535A US 00320141 A US00320141 A US 00320141A US 3791535D A US3791535D A US 3791535DA US 3791535 A US3791535 A US 3791535A
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US
United States
Prior art keywords
furnace
platform
pit
base
air
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
US00320141A
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English (en)
Inventor
T Baker
R Kieding
H Huthsing
R Burdick
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ROLAIR SYST Inc
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ROLAIR SYST Inc
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 ROLAIR SYST Inc filed Critical ROLAIR SYST Inc
Application granted granted Critical
Publication of US3791535A publication Critical patent/US3791535A/en
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60V—AIR-CUSHION VEHICLES
    • B60V3/00—Land vehicles, waterborne vessels, or aircraft, adapted or modified to travel on air cushions
    • B60V3/02—Land vehicles, e.g. road vehicles
    • B60V3/025—Land vehicles, e.g. road vehicles co-operating with a flat surface, e.g. transporting loads on platforms

Definitions

  • ABSTRACT A system for moving 40-ton melting furnaces from the furnace pit to the rebuilding shop and return. A furus. 214/1 'R, 180/125, 214/1 BE,
  • nace with base and superstructure, with a plurality of air bearings in the base for moving the furnace on an 51 int.
  • This invention relates to large melting furnaces such as are used in the production of aluminum, glass and the like, which may handle melts in the order of 40-tons and higher and weigh in excess of 250,000 pounds. More particularly, the invention is related to a system for moving such furnaces between the operating location in a furnace pit and a rebuilding location in a remotely located shop area.
  • a typical melting furnace includes a steel cage or framework and a lining of refractory brick and appropriate auxiliary equipment.
  • the large furnaces have an operating life in the order of three-years, after which it is necessary to remove the brick, rework or rebuild the frame and auxiliary equipment, and then rebuild the inner structure with new refractory brick. This is accomplished at the present time by taking the furnace out of production, permitting it to cool in position in the production line, and removing the refractory material at the location on the production line.
  • the framework'or cage may then be partially disassembled and transported to the shop area. After reworking, the frame and equipment are transported back to the production site and assembled. The new brick work is installed,therefractory material is cured, and the furnace is ready to resume production.
  • the rebuilding operation usually requires several weeks and as a result, the production site is out of operation for this length of time. With the present invention, the lost production time is reduced to a few days.
  • the present invention provides for removing an entire furnace from the production site, transporting it to a shop where it can be rebuilt, and immediately moving a stand-by furnace into place at the production site.
  • the present invention provides for moving the completed furnace on a plurality of air bearings between the shop and the furnace pit.
  • a platform is provided in the pit for receiving the furnace with the platform being movable vertically to raise the furnace from the pit bottom to the floor level.
  • Another lifting mechanism is provided for raising the furnace from the platform for inserting and removing the air bearings.
  • compressed air is delivered toan air bearing to inflate the bearing and raise the load, and to generate a film of air between the bearing and the ground surface, resulting in a very low friction between the load and the ground.
  • FIG. 1 is a perspective view of a production site showing a furnace being moved to a pit;
  • FIG. 2 is a view similar to that of FIG. 1 showing the furnace being moved into position on the platform of the pit;
  • FIGS. 3, 4 and 5 are views taken along the line 3 of FIG. 2, showing three steps in the lowering of the furnace into the pit.
  • a typical large melting furnace 10 is being moved along a roadway ill from a rebuilding shop to a pit 12 at the production site. Similar furnaces l3 and 14 are in position and in use at similar pit locations.
  • the furnace 10 may be conventional in design with a base and a steel frame superstructure 21 with a refractory brick lining 22.
  • a door 23 with appropriate door opening mechanism is provided at one end.
  • Various auxiliary equipment required for the operation of the furnace may be attached thereto and are not identified separately in the drawing.
  • the furnace base 20 includes receptacles indicated generally at 25 for slidingly receiving air bearings 26.
  • air bearings 26 In the embodiment illustrated four air bearings are provided at each side, but of course any number of air bearings may be used depending upon the load and the rating of the individual bearings.
  • the air bearings may be installed and removed in the conventional manner as illustrated in the aforementioned copending application Ser. No. 180,666. In an alternative configuration, the bearings may be mounted in a transporter or platform, with the entire transporter being inserted and removed at the furnace base.
  • the furnace base includes means for distributing air to each of the air bearings from an air supply line which is connected to any suitable source of air under pressure.
  • the bearings When the air supply is connected to the bearings, the bearings are inflated, raising the furnace from the ground surface, and floating the furnace of a film of air between the bearings and the ground surface.
  • the large load When in this condition, the large load has low friction and is readily moved along the roadway 11, typically by tractors 31 connected to the furnace by frame units 32 at the front and rear.
  • a -ton capacity furnace will weigh 250,000 pounds and will have substantial inertia, and a pair of tractors provide the necessary forces for starting and stopping movement and for guiding the furnace during movement.
  • the furnace pit 40 is set in the ground at the production site, typically in a concrete foundation 41.
  • a platform 42 is positioned in the pit and a lifting system, typically a set of hydraulic jacks 43, is mounted in the bottom of the pit for raising and lowering the platform 42.
  • the platform is shown in the raised position in FIGS. 14, and in the lowered position in FIG. 5, with the platform resting on the base of the pit so that the pit floor carries the weight of the loaded furnace during production.
  • a second lifting system is provided for raising and lowering the furnace with respect to the platform and typically may comprise another set of hydraulic jacks 45 mounted in the bottom of the pit, with the upper ends of the jacks 45 moving through openings in the platform 42 for directly engaging the furnace base.
  • the platform 42 is raised to the upper position flush with the roadway 11 by the jacks 43.
  • the furnace 10 is floated into position on the platform 42, as illustrated in FIG. 2.
  • the air supply to the air bearings may be turned off.
  • the jacks 45 are then raised, moving through the platfrom 42 and engaging the furnace base to raise the furnace above the platfrom, as
  • FIG. 3 The air bearings may then be removed, after which the jacks 45 are actuated to lower the furnace onto the platform, as illustrated in FIG. 4.
  • the jacks 43 are then actuated to lower the platform and furnace to the bottom of the pit, as illustrated in FIG. 5.
  • the furnace is now ready for connection and production.
  • the jacks 43 and 45 may be permanently installed in the pit or alternatively, may be removable so that one set of jacks 43 and one set of jacks 45 may be used in conjunction with several production locations.
  • the brick. work in a furnace is highly susceptible to cracking, particularly at the mortar joints, when the structure is subjected to stress. Movement of such a large unit on wheels or skids or similar moving devices produces the undesirable furnace stresses as a result of 2 5 roadway bumps and shocks.
  • the present furnace moving system with the load floating on an air film from a plurality of diaphragms provides air cushioning of the road shock and substantially eliminates the risk of cracked joints in the rebuilt furnace.
  • a furnace platform positioned in said pit and engagable with said base for supporting said furnace; first lifting means for raising and lowering said platform in said pit;
  • distribution means in said furnace base for directing air under pressure to each of said air bearings for raising said furnace base from said platform when said air bearings are inflated floating said furnace on an air film.
  • furnace base includes receptacle means for slidingly receiving said air bearings, permitting removal and insertion of air bearings when said furnace is raised from said platform by said second lifting means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
US00320141A 1973-01-02 1973-01-02 Furnace moving system Expired - Lifetime US3791535A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US32014173A 1973-01-02 1973-01-02

Publications (1)

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US3791535A true US3791535A (en) 1974-02-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00320141A Expired - Lifetime US3791535A (en) 1973-01-02 1973-01-02 Furnace moving system

Country Status (2)

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US (1) US3791535A (enrdf_load_stackoverflow)
JP (1) JPS564827B2 (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4375960A (en) * 1980-02-27 1983-03-08 Elkem A/S Means for transporting/rotating the pot of a smelting furnace
GB2162229A (en) * 1984-07-24 1986-01-29 Aero Go Limited Improvements relating to scaffolding
US4772176A (en) * 1987-07-20 1988-09-20 Montgomery Harold S Handling of palletized goods in a warehouse or the like
US5058654A (en) * 1990-07-06 1991-10-22 Outboard Marine Corporation Methods and apparatus for transporting portable furnaces
US6164229A (en) * 1999-05-27 2000-12-26 The United States Of America As Represented By The Secretary Of The Navy Air bearing pontoon system for shipping containers
US6494313B1 (en) * 2001-07-10 2002-12-17 William Bernard Trescott Stackable open front grocery and goods bin with compressed air cushion mobility
US20110258837A1 (en) * 2008-12-23 2011-10-27 Xoma Technology Ltd. Flexible manufacturing system
US20160238279A1 (en) * 2015-02-13 2016-08-18 Corning Incorporated Methods of processing a furnace
CN106080696A (zh) * 2016-06-30 2016-11-09 钟彩凤 一种筒膜放置运送机构
US9803888B2 (en) 2012-03-12 2017-10-31 Maximum Air Llc HVAC base and return air system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6010181U (ja) * 1983-06-29 1985-01-24 株式会社東芝 冷凍機
JPS61161715U (enrdf_load_stackoverflow) * 1985-03-29 1986-10-07
JPS61161714U (enrdf_load_stackoverflow) * 1985-03-29 1986-10-07
JPS632123U (enrdf_load_stackoverflow) * 1986-06-20 1988-01-08
JPH03195890A (ja) * 1989-12-26 1991-08-27 Sumitomo Light Metal Ind Ltd 金属溶炉の更新工法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3185238A (en) * 1960-10-03 1965-05-25 Douglas Aircraft Co Inc Pneumatic loadlifting and translating means
US3419164A (en) * 1966-01-12 1968-12-31 Robert A. O'neill Method and apparatus for handling aircraft passengers, baggage and freight
GB1214813A (en) * 1966-12-23 1970-12-02 Adrianus Egidius Quirinu Hezik A method and an apparatus for displacing a heavy load to a foundation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3185238A (en) * 1960-10-03 1965-05-25 Douglas Aircraft Co Inc Pneumatic loadlifting and translating means
US3419164A (en) * 1966-01-12 1968-12-31 Robert A. O'neill Method and apparatus for handling aircraft passengers, baggage and freight
GB1214813A (en) * 1966-12-23 1970-12-02 Adrianus Egidius Quirinu Hezik A method and an apparatus for displacing a heavy load to a foundation

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4375960A (en) * 1980-02-27 1983-03-08 Elkem A/S Means for transporting/rotating the pot of a smelting furnace
GB2162229A (en) * 1984-07-24 1986-01-29 Aero Go Limited Improvements relating to scaffolding
US4772176A (en) * 1987-07-20 1988-09-20 Montgomery Harold S Handling of palletized goods in a warehouse or the like
US5058654A (en) * 1990-07-06 1991-10-22 Outboard Marine Corporation Methods and apparatus for transporting portable furnaces
US6164229A (en) * 1999-05-27 2000-12-26 The United States Of America As Represented By The Secretary Of The Navy Air bearing pontoon system for shipping containers
US6494313B1 (en) * 2001-07-10 2002-12-17 William Bernard Trescott Stackable open front grocery and goods bin with compressed air cushion mobility
US20110258837A1 (en) * 2008-12-23 2011-10-27 Xoma Technology Ltd. Flexible manufacturing system
US10294658B2 (en) * 2008-12-23 2019-05-21 Xoma (Us) Llc Flexible manufacturing system
US9803888B2 (en) 2012-03-12 2017-10-31 Maximum Air Llc HVAC base and return air system
US20160238279A1 (en) * 2015-02-13 2016-08-18 Corning Incorporated Methods of processing a furnace
CN106080696A (zh) * 2016-06-30 2016-11-09 钟彩凤 一种筒膜放置运送机构

Also Published As

Publication number Publication date
JPS564827B2 (enrdf_load_stackoverflow) 1981-02-02
JPS506507A (enrdf_load_stackoverflow) 1975-01-23

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