US3552729A - Slideway construction - Google Patents

Slideway construction Download PDF

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Publication number
US3552729A
US3552729A US767581A US3552729DA US3552729A US 3552729 A US3552729 A US 3552729A US 767581 A US767581 A US 767581A US 3552729D A US3552729D A US 3552729DA US 3552729 A US3552729 A US 3552729A
Authority
US
United States
Prior art keywords
slideway
rider
shoe
surface portion
extending
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
US767581A
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English (en)
Inventor
Gunter Hepp
Christian Brockmann
Hans Christoph Pohl
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.)
Koppers Wistra Ofenbau GmbH
EOn Ruhrgas AG
Original Assignee
Koppers Wistra Ofenbau GmbH
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
Priority claimed from DE19671583381 external-priority patent/DE1583381A1/de
Application filed by Koppers Wistra Ofenbau GmbH filed Critical Koppers Wistra Ofenbau GmbH
Application granted granted Critical
Publication of US3552729A publication Critical patent/US3552729A/en
Assigned to RUHRGAS AG, D-4300 ESSEN, GERMANY reassignment RUHRGAS AG, D-4300 ESSEN, GERMANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WISTRA GMBH THERMOPROZESSTECHNIK
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/20—Supporting arrangements, e.g. for securing water-tube sets

Definitions

  • a support rail in a slideway for pusher furnaces includes at least one elongated tubular support member having a longitudinally extending surface portion thereon. A pair of raised ribs are rigid with the support member and extend longitudinally thereof at opposite sides of the surface portion. An elongated rider shoe of polygonal cross section has longitudinally extending wider and narrower surfaces and is supported with one of the narrower surfaces on the surface portion of a tubular member, resting loosely thereon between the ribs which support it.
  • the present invention relates generally to slideways, and more specifically to slideways such as find use in pusher furnaces and the like.
  • slideways especially'in pusher furnaces and for similar applications, is well known. They are provided to facilitate transportation of materials which are to be treated through the various zones of the furnace. Their use makes it possible to have the material to be treated exposed substantially at all sides, that is at its upper side and at its lower side and at its lateral sides, whereby the treatment is mademore uniform and can be carried more quickly.
  • slideways which are known in the art consist of a tubular member through which a coolingfluid such as water is circulated, and supported on this tubular member connected therewith are so-called slide shoes on which the material to be treated slides along.
  • slide shoes Located intermediate the tubular member and'the slide shoes, which latter consist of highly in order to be able to maintain these surfaces at such high temperatures, it is necessary to utilize materials for the rider shoes which are very highly resistant to heat and which are, ac-- cordingly, particularly expensive. Thisis evidently a disadvantage.
  • a further disadvantage is the fact that in known constructions the rider shoes either directly embrace the cooled tubular support member or are located in atrou'gh consisting of the tubular support member and supporting rails which are so welded to the support member as to extendlaterally along the same. In either case, the construction is always such in theprior art that there is an extensive heat exchange between the Based on these considerations it is an object of this invention to overcome the aforementioned disadvantages of existing constructions. More particularly it, is an object of the present invention to provide a slideway construction not pos- Y sessed of the aforementioned disadvantages.
  • a further object of the invention is to provide such a slideway construction which is simple but highly effective in eliminating the development of dark strips on material being treated and sliding on the slideway,abut which is at the same time very economical in its construction.
  • An additional object of the invention is to provide such a slideway construction wherein the rider shoes are much lighter than is known from prior art constructions and may have any desired configuration, being also-capable-of assuming any desired contact surface temperature.
  • a slideway which is particularly suitable for pusher furnaces but also for other applications, of at least one elongated tubular support element which is internally cooled and has a longitudinally extending surface portion.
  • a pair of raised ribs is rigid with the tubular support element and extends longitudinally thereof at opposite sides of this surface portion.
  • At least one elongated rider shoe or polygonal gross section has cross section has longitudinally extending wider and narrower surfaces. The rider shoe is positioned between and supported by the guide ribs and loosely rests on the surface portion of the tubular support elemen with one of its narrower surfaces.
  • transversely extending members may be provided on the tubular element, for instance by being welded thereon, and extending into recesses in the abutment surface of the rider shoe to relieve the stresses exerted upon the latter in longitudinal direction by the advancing material being treated.
  • the underside or abutment face of the rider shoe may be provided with depressions or recesses in which thermally insulating material may .be located which-is not subjected to any weight or pressures.
  • These depressions or recesses may be so configurated, for instance they may be of swallowtail or dovetail configuration, that each rider shoe rests on the surface portion of the tubular element only with a plurality of contact portions or feet rather than with its entire abutting surface.
  • the tubular support element will be insulated in suitable manner which is already known from the art.
  • the width of the rider shoe may be selected in dependence upon the load carrying ability of the material used at the temperature which exists at the contact surface with which the rider shoe contacts the material being advanced along the contact surface.
  • the height and the width of the rider shoe have a predetermined relationship which can be readily determined by those skilled in the art, so as to assure that the contact surface will reach the desired elevated temperatures. If the rider shoe is of relatively small width it will be of massive construction, but if it is of greater width its underside will be recessed so that there will be a groove or depression extending in longitudinal direction of the rider shoe.
  • the construction may be provided with a rail which is advantageously welded to the surface portion of the tubular support member intermediate the lateral ribs and which is located in the longitudinally extending recess or groove.
  • This rail need not be continuous.
  • the lateral ribs are welded to the longitudinally extending surface portion of the tubular member, the latter being given any desired cross-sectional configuration, for instance polygonal, and the relationship of their height and thickness is so selected that maximum permissible temperatures within each rib will not be exceeded at any operational temperature of the furnace. This guarantees that the ribs always have the strength necessary for reliably retaining the rider shoes.
  • the welded connection between the ribs and the tubular support member facilitates the desired cooling effect upon the ribs.
  • the rider shoes advantageously will have a length on the order of I meter. This makes it possible for each rider shoe to absorb the longitudinally directed thrust of the material being treated despite the thermal expansion of the rider shoes, and the lateral thrust decreases as the material moves from one to the next consecutive rider shoe. In other words, the thrust cannot build up because the buildup is interrupted.
  • the rider shoes may be provided with one or more transverse bores, for instance near midway between their opposite ends, and a bolt may be extended through such a bore and secured to lugs which are welded to the tubular support member at opposite sides of the rider shoe.
  • FIG. I is a transverse section through a construction embodying our invention.
  • FIG. 2 is a longitudinal section through the embodiment shown in FIG. 1; I
  • FIG. 3 is a transverse section through a construction according to another embodiment of our invention.
  • FIG. 4 is a longitudinal section through the embodiment of FIG.3.
  • reference numeral indicates thetubular support element which may be of any desired crosssectional configuration, not being limited-to;;th.e one shown herein.
  • a cooling fluid usually water, is circulated through the element 1 to cool the same.
  • the cross -sec-' tional configuration of the rider shoe 2in this embodiment is clearly visible. It will be seen that the ride lfoe 2 rests with a narrower surface portion on the longitud ally extending surface portion of the element 1.
  • ribs 3 Located at opposite sides of the rider shoewelded to the: tubular element 1 are two ribs 3 extending in longitudinal direction of the element 1 and the rider shoe 2 is located between them so as to be supported thereby against lateral movement.
  • a rail 7 welded to the tubular support element 1 and the abutment surface or tinderside of the rider shoe 2 is provided with a longitudinally a tending recess or groove 6 in which the rail 7 is locatedQTher rail 7 need not be continuous, as has'been pointed out earlier.
  • Reference numeral 4 indicates an abutment member'which' is also welded onto the tubular element l, but extending transversely of the elongation thereof, and which extends into a depression 5 in the underside of the rider shoe 2 so as to secure the latter against longitudinal advancement when the material to be treated moves over its contact surface, that is to withstand the longitudinal thrust.
  • a transverse bore thro ugh which a bolt 9 extends. The opposite ends of the bolt 9are secured in lugs which are welded to the tubular element 1 at opposite lateral sides of the rider shoe 2.
  • FIGS. 1 and 2 illustrate, the entire construction with the exception of the upper exposed portion of the rider shoe 2 is surrounded with insulating material 1 which is already known in the art and which need not be further described.
  • the manner of insulating is also known, it may be applied in form of blocks or in form of compacted insulating material. It should be noted, however, that at the opposite lateral sides of the rider shoe 1 the insulating material does not quite contact the lateral faces of the rider shoe so that a gap exists between each lateral face and the adjacent insulating material.
  • the rider shoe in the illustrated embodiment is provided with longitudinally extending projections 15 which overlie each of these gaps and which are tapered in cross-sectional configuration in the manner of a gable roof.
  • the rider shoe 2 consists in its entirety of material which is highly resistant to heat..
  • material being treated which must consist'of such highly heat resistant material
  • the rider shoe be of two-piece construction.
  • the lower part of the rider shoe that is the one which is closer to the tubular support member and farther from the material being treated, may con sist of less expensive material which is not as resistant to heat: Naturally, the two parts must then be suitably secured to one; another.
  • FIGS. 3 and 4 This embodiment is illustrated in FIGS. 3 and 4 wherein the reference numerals which are identical with thoseof FIGS: I ⁇ and 2 identify elements which are identical with the elements:- shown in FIGS. 1 and 2.
  • the main difference h'eie is the com struction of the rider shoe which, as is evident, consists of an upper part 2a and lower part 2b.
  • the upper part 2a consists of K highly heat-resistant material whereas the lower part 2b con sists of material which is less resistant to heat than that'of'thew then secure the strips to that portion with which they are not integral, thereby connecting the portions 2:: and 2b to one another.
  • strips-the portions 12 may be configurated as tongues or the like.
  • the juxtaposed abutment surfaces of the ;two portions may be provided with interengaging projections and depressions, here identified as teeth 14 of substantially trapezoidal configuration.
  • rider shoe as applied herein is not intended to designate a particular type or configuration of element on which the material to be treated will slide. Rather, and contrary to any general connotation the term may have, it is intended to be generic to all types of such sliding elements on which the material to be treated is to slide along.
  • the combination comprising at least one elongated tubular support element having a longitudinally extending surface portion; a pair of raised ribs rigid with said tubular support element and extending longitudinally thereof at opposite sides of said surface portion; at least one elongated rider shoe of polygonal cross section having longitudinally extending wider and narrower surfaces, said rider shoe being positioned between and supported by said guide ribs and loosely resting on said surface portion with one of said narrower surfaces; at least one longitudinally extending groove provided in said one narrower surface; and a guide rail provided on saidsurface portion, rigid therewith and extending longitudinally thereof intermediate said ribs, said guide rail extending into said-groove for stabilizing said rider shoe.
  • tubular element in a slideway as defined in claim I. said tubular element being internally cooled.
  • said rider shoe having opposite ends and being provided with at least one transverse hole intermediate said ends; and further comprising bolt means extending through said hole and rigidly connecting said rider shoe with said tubular element.
  • said rider shoe being of substantially U-shaped cross section with the open side of the U-shape facing said surface portion and constituting said groove into which said rail extends.
  • said rail comprising at least two longitudinally aligned sections.
  • said one narrower surface being provided with a plurality of recesses whereby only spaced parts of said one narrower surface contact said surface portion; and thermally insulating material received in said recesses.
  • said thermally insulatand in part embedding said rider shoe, the latter being exposed to the extend requisite for enabling free sliding movement of a supported article on a supporting surface of the rider shoe.
  • said insulating means comprising an insulating substance extending toward but out of contact with said rider'shoe so that gaps exist between opposite lateral sides of the latter and the insulating Y substance; and further comprising longitudinally extending ridges provided on said rider shoe projecting laterally thereof and each overlying one of said gaps.
  • said rider shoe consisting of a lower part and an upper part, said upper part consisting of material which has higher resistance to heat than said lower part; and means rigidly connecting said parts to one another.
  • said means comprising connecting strips rigid with opposite lateral sides of one of said parts and overlying opposite lateral sides of the other part, and releasable connecting elements connecting said strips with said other part.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chain Conveyers (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
US767581A 1967-09-30 1968-10-01 Slideway construction Expired - Lifetime US3552729A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671583381 DE1583381A1 (de) 1967-09-30 1967-09-30 Gekuehlter Gleitbalken,insbesondere fuer Stossoefen

Publications (1)

Publication Number Publication Date
US3552729A true US3552729A (en) 1971-01-05

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ID=5679486

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Application Number Title Priority Date Filing Date
US767581A Expired - Lifetime US3552729A (en) 1967-09-30 1968-10-01 Slideway construction

Country Status (4)

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US (1) US3552729A (enrdf_load_stackoverflow)
AT (1) AT291324B (enrdf_load_stackoverflow)
FR (1) FR1579440A (enrdf_load_stackoverflow)
GB (1) GB1204015A (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3642261A (en) * 1969-07-16 1972-02-15 British Iron Steel Research Furnace skids and beams
US3706448A (en) * 1970-03-23 1972-12-19 British Iron Steel Research Skids or beams for furnaces
JPS4942104U (enrdf_load_stackoverflow) * 1972-07-21 1974-04-13
US4056351A (en) * 1975-02-07 1977-11-01 Koppers-Wistra-Ofenbau Gmbh Workpiece-engaging element for furnaces
US4080152A (en) * 1975-01-11 1978-03-21 Fried Krupp Huttenwerke Ag Bracing tube for pusher type or rocker bar furnaces
US4253826A (en) * 1979-09-10 1981-03-03 Campbell Frank Jun Truncated triangular skid pipe
US4290457A (en) * 1979-11-02 1981-09-22 Campbell Frank Jun Truncated triangular insulator
US4354824A (en) * 1981-04-02 1982-10-19 Cameron Iron Works, Inc. Method and device for reducing heat flow from a workpiece to a skip pipe
US4689009A (en) * 1984-11-24 1987-08-25 Ruhrgas Aktiengesellschaft Skid system for carrying a furnace charge

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1351487A (fr) * 1962-12-10 1964-02-07 Stein & Roubaix Perfectionnements aux fours et aux produits traités dans de tels fours

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1351487A (fr) * 1962-12-10 1964-02-07 Stein & Roubaix Perfectionnements aux fours et aux produits traités dans de tels fours

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3642261A (en) * 1969-07-16 1972-02-15 British Iron Steel Research Furnace skids and beams
US3706448A (en) * 1970-03-23 1972-12-19 British Iron Steel Research Skids or beams for furnaces
JPS4942104U (enrdf_load_stackoverflow) * 1972-07-21 1974-04-13
US4080152A (en) * 1975-01-11 1978-03-21 Fried Krupp Huttenwerke Ag Bracing tube for pusher type or rocker bar furnaces
US4056351A (en) * 1975-02-07 1977-11-01 Koppers-Wistra-Ofenbau Gmbh Workpiece-engaging element for furnaces
US4253826A (en) * 1979-09-10 1981-03-03 Campbell Frank Jun Truncated triangular skid pipe
US4290457A (en) * 1979-11-02 1981-09-22 Campbell Frank Jun Truncated triangular insulator
US4354824A (en) * 1981-04-02 1982-10-19 Cameron Iron Works, Inc. Method and device for reducing heat flow from a workpiece to a skip pipe
US4689009A (en) * 1984-11-24 1987-08-25 Ruhrgas Aktiengesellschaft Skid system for carrying a furnace charge

Also Published As

Publication number Publication date
FR1579440A (enrdf_load_stackoverflow) 1969-08-22
AT291324B (de) 1971-07-12
GB1204015A (en) 1970-09-03

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Owner name: RUHRGAS AG, D-4300 ESSEN, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WISTRA GMBH THERMOPROZESSTECHNIK;REEL/FRAME:004368/0463