EP0397231A1 - Roller for transporting hot objects - Google Patents

Roller for transporting hot objects Download PDF

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Publication number
EP0397231A1
EP0397231A1 EP90201022A EP90201022A EP0397231A1 EP 0397231 A1 EP0397231 A1 EP 0397231A1 EP 90201022 A EP90201022 A EP 90201022A EP 90201022 A EP90201022 A EP 90201022A EP 0397231 A1 EP0397231 A1 EP 0397231A1
Authority
EP
European Patent Office
Prior art keywords
roller
core
elements
roller according
hot objects
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.)
Withdrawn
Application number
EP90201022A
Other languages
German (de)
English (en)
French (fr)
Inventor
Cornelis Franciscus Jacobus De Haan
Ferdinand Albert Schuurmans
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.)
Hoogovens Industrial Ceramics BV
Original Assignee
Hoogovens Industrial Ceramics BV
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 Hoogovens Industrial Ceramics BV filed Critical Hoogovens Industrial Ceramics BV
Publication of EP0397231A1 publication Critical patent/EP0397231A1/en
Withdrawn legal-status Critical Current

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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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/14—Supports for linings
    • F27D1/141—Anchors therefor
    • 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
    • F27D3/026—Skids or tracks for heavy objects transport or conveyor rolls for furnaces; roller rails

Definitions

  • the invention relates to a roller for transporting hot objects which the roller contacts and to a conveyor for hot objects comprising a plurality of the rollers.
  • roller for transporting hot objects has a cylindrical steel core and a plurality of cylindrical elements with central holes which slide onto the core with a slight clearance.
  • a roller of this type is shown in FR-A-793 942.
  • the cylindrical elements are discs made of material containing asbestos and are pressed together at their outer peripheries to reduce wear.
  • Such a roller in practice is used for example in a furnace at a temperature of about 1200°C for transporting stainless material with a width of about 1500 mm and a thickness of about 12.7 mm.
  • the known roller wears rather badly and also presents health hazards.
  • roller for hot objects is disclosed in DE-C-996 177.
  • the surface of the roller is provided by an outer sleeve of ceramic material, specifically SiC, and between the sleeve and the steel core is a filling of cement.
  • the roller is thus a unitary body.
  • the defect of such a roller is that the bending caused by the weight of the supported object is liable to introduce tensile stresses in the ceramic sleeve, which may crack.
  • FR-A-1462 443 describes a roller in which annular elements are mounted on a metal shaft.
  • the elements are of low density refractory material in the form of asbestos fibers and diatomaceous earth, and have a very thin enamel surface at their periphery. This construction is unsuitable for heavy loads or high temperatures, being intended for the handling of glass ampules containing liquids for pharmaceutical use. If heavy loads are applied, the resultant bending of the roller would cause stress between the elements, resulting in cracking of the enamel.
  • the purpose of the invention is to create a roller suitable for high temperatures and heavy loads which need not have any asbestos in it, but which compares well in price and service life with the known high temperature roller first mentioned. above.
  • the present invention provides a roller as set out in claim 1.
  • a roller in accordance with the invention with an outer jacket of industrial ceramic material, such as for example Si3N4 or SiC or a combination of the two, such as for example Si3N4 with about 4-8% SiC, is resistant to use at very high temperature, such as for example 1200°C, and is very resistant to wear.
  • the use of annular spacing discs between the load-contacting elements achieves correct spacing and avoids stresses due to bending of the roller.
  • the spacing discs are circular with a diameter less than the outside diameter of the annular elements, preferably less than half the latter diameter, and a central hole with a diameter larger than the external diameter of the core. This helps reduce tensile stresses in the industrial ceramic material as the roller bends under the effect of the weight of the hot objects to be transported.
  • the annular elements preferably have preformed inner sleeves defining their contact holes.
  • Anchoring projections may extend outwardly from the inner sleeve into the filling. This means on the one hand that the component has a pre-determined dimension, while on the other there is a fixed connection between the inner sleeve and the refractory material.
  • the outer jacket of the industrial ceramic material may be attached to the refractory material which forms the filling.
  • the outer jacket it is preferable for the outer jacket to be of a pre-formed sleeve of industrial ceramic material which is subsequently filled with a filling of refractory material in thick liquid form or in the form of a mass.
  • the filling may then take a solid form through the action of a binder such as a chemical or hydraulic binder.
  • the refractory filling material is preferably a refractory concrete.
  • the combination of an outer jacket of wear resistant industrial ceramic material and a filling of a relatively inexpensive material is very attractive in price.
  • the outer jacket is preferably provided on its inside with keying projections and/or recesses extending axially and/or circumferentially. This prevents the sleeve from rotating and/or displacing axially relative to the refractory filling material.
  • Fig. 1 shows a roller 1 comprising a cylindrical steel core 2 with a plurality of cylindrical load-contacting annular elements 3 which slide axially onto the core and which are retained by the end discs 4 and 5.
  • the furnace wall is schematically indicated at 6.
  • the roller is taken through the furnace wall 6 with the aid of a seal, for example a labyrinth seal (not shown in the drawing).
  • the drawing shows the core 2 as hollow; it is cooled by means of air flowing through it in the direction of arrow 7.
  • each annular element 3 has an outer jacket 8 in the form of a preformed sleeve 9 of industrial ceramic material i.e. engineering quality ceramic such as Si3N4 containing 4-­8% SiC, and a filling 10 of refractory material such as refractory concrete.
  • the element 3 slides onto the core 2 with a slight clearance.
  • Retaining the filling 10 at the inner side is a preformed sleeve made e.g. of steel, which is provided externally with anchors 15 which extend into the filling 10.
  • Spacing means in the form of annular discs 12, 13, e.g. of metal, are fitted between the neighboring components. These discs 12, 13 have an outside diameter which is much less than that of the outer jacket 8 and a hole with a diameter which is a little larger than the core 2.
  • Each annular element 3 has for example a length/diameter ratio lying between 0.5 and 2. This means that, generally speaking, the tensile stresses in the industrial ceramic material resulting form the weight of the objects transported are acceptable.
  • the external sleeve 9 is provided internally with axially and circumferentially extending projections 14 for preventing the sleeve from rotating or displacing on the filling 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
EP90201022A 1989-05-08 1990-04-24 Roller for transporting hot objects Withdrawn EP0397231A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8901148 1989-05-08
NL8901148A NL8901148A (nl) 1989-05-08 1989-05-08 Rol.

Publications (1)

Publication Number Publication Date
EP0397231A1 true EP0397231A1 (en) 1990-11-14

Family

ID=19854612

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90201022A Withdrawn EP0397231A1 (en) 1989-05-08 1990-04-24 Roller for transporting hot objects

Country Status (2)

Country Link
EP (1) EP0397231A1 (nl)
NL (1) NL8901148A (nl)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993016343A1 (en) * 1992-02-12 1993-08-19 Metallamics, Inc. Intermetallic alloys for use in the processing of steel
EP0633815A1 (en) * 1992-02-24 1995-01-18 Bricmanage Inc IMPROVEMENT FOR AN INSULATING OVEN CYLINDER AND MANUFACTURING METHOD THEREOF.
EP0982555A1 (en) * 1998-08-21 2000-03-01 Kubota Corporation Slab transport roller
DE19923114A1 (de) * 1999-05-19 2000-11-23 Johannes Stark Rolle für einen Warmbehandlungsofen
TWI505998B (zh) * 2009-05-14 2015-11-01 Corning Inc 模組化拉引滾軸及其製造與使用方法
DE102017208710A1 (de) 2016-09-27 2018-03-29 Sms Group Gmbh Kühlbare Ofenrolle und Verfahren zum Betrieb einer solchen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR793942A (fr) * 1934-11-10 1936-02-04 Saint Gobain Perfectionnement aux rouleaux servant au déplacement d'objets à haute température
DE966177C (de) * 1947-08-06 1957-07-11 Gas Machinery Company Walze zum Foerdern von Werkstuecken in industriellen Waermoefen
US3077058A (en) * 1957-12-30 1963-02-12 Universal Oil Prod Co Insulated chamber
FR1462443A (fr) * 1965-11-05 1966-04-15 Applic Thermiques Et Ind Perfectionnements aux transporteurs à rouleaux d'articles en verre, notamment aux transporteurs d'ampoules allongées en verre
US3860387A (en) * 1973-11-09 1975-01-14 Bricmont & Ass Inc Roller for supporting a workpiece in a furnace or the like

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR793942A (fr) * 1934-11-10 1936-02-04 Saint Gobain Perfectionnement aux rouleaux servant au déplacement d'objets à haute température
DE966177C (de) * 1947-08-06 1957-07-11 Gas Machinery Company Walze zum Foerdern von Werkstuecken in industriellen Waermoefen
US3077058A (en) * 1957-12-30 1963-02-12 Universal Oil Prod Co Insulated chamber
FR1462443A (fr) * 1965-11-05 1966-04-15 Applic Thermiques Et Ind Perfectionnements aux transporteurs à rouleaux d'articles en verre, notamment aux transporteurs d'ampoules allongées en verre
US3860387A (en) * 1973-11-09 1975-01-14 Bricmont & Ass Inc Roller for supporting a workpiece in a furnace or the like

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993016343A1 (en) * 1992-02-12 1993-08-19 Metallamics, Inc. Intermetallic alloys for use in the processing of steel
US5824166A (en) * 1992-02-12 1998-10-20 Metallamics Intermetallic alloys for use in the processing of steel
US5983675A (en) * 1992-02-12 1999-11-16 Metallamics Method of preparing intermetallic alloys
EP0633815A1 (en) * 1992-02-24 1995-01-18 Bricmanage Inc IMPROVEMENT FOR AN INSULATING OVEN CYLINDER AND MANUFACTURING METHOD THEREOF.
EP0633815A4 (en) * 1992-02-24 1995-02-01 Bricmanage, Inc. Improvement in an insulated furnace roller and method of manufacture.
EP0982555A1 (en) * 1998-08-21 2000-03-01 Kubota Corporation Slab transport roller
DE19923114A1 (de) * 1999-05-19 2000-11-23 Johannes Stark Rolle für einen Warmbehandlungsofen
DE19923114C2 (de) * 1999-05-19 2001-12-13 Johannes Stark Rolle für einen Warmbehandlungsofen
TWI505998B (zh) * 2009-05-14 2015-11-01 Corning Inc 模組化拉引滾軸及其製造與使用方法
DE102017208710A1 (de) 2016-09-27 2018-03-29 Sms Group Gmbh Kühlbare Ofenrolle und Verfahren zum Betrieb einer solchen
WO2018059940A1 (de) 2016-09-27 2018-04-05 Sms Group Gmbh Kühlbare ofenrolle und verfahren zum betrieb einer solchen

Also Published As

Publication number Publication date
NL8901148A (nl) 1990-12-03

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