US3572674A - Tiltable support frame for a metallurgical vessel - Google Patents

Tiltable support frame for a metallurgical vessel Download PDF

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Publication number
US3572674A
US3572674A US824839A US3572674DA US3572674A US 3572674 A US3572674 A US 3572674A US 824839 A US824839 A US 824839A US 3572674D A US3572674D A US 3572674DA US 3572674 A US3572674 A US 3572674A
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Prior art keywords
vessel
supporting rods
pair
supporting
set forth
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US824839A
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English (en)
Inventor
Friedrich Wilhelm Bornscheuer
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Mannesmann Demag AG
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Demag AG
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4633—Supporting means

Definitions

  • the present invention is directed to a support structure for a metallurgical vessel, such as a converter used in steel production, and in particular, it is directed to a support frame which laterally encloses the converter but does not come in contact with it. Further, the frame and the converter are tiltable about a horizontal axis by means of pivot members attached to the frame.
  • the present invention is directed to an arrangement for supporting the vessel in such a manner that all of its thermal deformation, that is both the permanent and the reversible deformation, can take place to the greatest extent possible without obstruction or limitation. Further, in the invention the compulsive forces developed are small and can be absorbed without any problems. Another characteristic of the invention is its ability to adapt to the displacement of the attachment points between the supporting frame structure and the vessel without any interruptions in operation and in accordance with the permanent deformations which take place during operation.
  • the metallurgical vessel is positioned within the supporting frame by employing a minimum of limiting force to its deformability.
  • This feature of the invention is accomplished by the use of flexible supporting rods located at spaced positions about the periphery of the vessel and extending between the vessel and the carrying frame. In connecting the supporting rods between the vessel and the frame the axes of the rods are arranged perpendicular to one of the directions in which the vessel deforms under thermal stress. Accordingly, the basic concept of the invention is to provide a connection between the vessel and the supporting or carrying frame in which the free deformability of the vessel is limited to the least extent possible.
  • Another feature of the invention is the slender configura tion of the flexible supporting rods which gives them the property of soft springs, as contrasted to the known claw support structure, mentioned above, which is built of a rigid arrangement of plates and stiffening components.
  • the supporting rods are formed of a multiplicity of individual wires either a sheathed or unsheathed cable having a reduced modulus elasticity can be used. If the individual wires are not twisted, that is, their rectilinear axes are disposed in parallel relationship to one another, the moment of inertia of the rods is greatly reduced. Where such cables are used as the supporting rods, they provide considerable advantages over bolts having full wall cross sections, though such bolts.
  • the carrying frame can include a basketlike structure formed of individual beams for supporting the vessel at it base.
  • Another feature of the invention is to secure the vessel to 1 the carrying frame, at least in part, by means of the flexiblev .1 supporting rods which are secured to the vessel in a tangential manner. Tangentially acting forces yield the least stress in the vessels shell.
  • Yet another feature of the invention is the employment 0 fixed or movable attachment heads for fastening the flexible supporting rods to the periphery of the vessel.
  • the supporting rods can be prestressed. Varying conditions apply to the prestress forces depending on the location of the attachment heads on the vessel.
  • the reinforcement rings can be located adjacent the mouth of the vessel which is an area in which very high thermal stresses are developed. However, the reinforcement rings are also suited for use about the vessel in any location where it is desired to introduce punctiform loads.
  • the transfer of the total load from the vessel to the carrying frame can be accomplished in several different positions on the vessel.
  • Such transfer of load can be accomplished by providing a pair of tangentially arranged rods on opposite sides of the vessel extending transversely to the vessel center line and to the tilting axis of the carrying frame, and by employing another pair of similarly oriented supporting rods in spaced relationship to the first part and located about the periphery of the vessel or connecting the bottom of the carrying frame with the bottom of the vessel.
  • the transverse supporting rods extending between the carrying frame and the attachment heads on the vessel transfer identical percentages of the total load P, if the prestressing force V of the supporting rods is correspondingly great.
  • the invention is based upon the use of the flexible supporting rods.
  • the supporting rods In its original support position within the carrying frame the supporting rods are disposed at diametrically opposed attachment points, however, their position changes rapidly after deformation of the vessel takes place. Under such deformation the shape of the rods then resembles a somewhat slender S-shaped configuration. In addition to the elongation developed within the supporting rods, they are also subjected to bending stress.
  • Another feature of the invention is the ability of the supporting rods, based on their length dimensions, to influence the additional stress which takes place during operation based on the oblique attitude of the rods, since when longer rods are used they will be subjected to smaller additional stresses.
  • an analogous fastening mode to the one described above can be employed using supporting rods which extend in the vertical direction.
  • the vessel is then supported by a plurality of ang" larly spaced stressed longitudinally extending rods.
  • Yet another characteristic of the invention is the ability to afford complete prestress of the supporting rods used in transmitting the load between the vessel and the carrying frame.
  • the prestress of the supporting rods in the inverted position is selected as equal to or greater than the gross weight of the vessel.
  • the supporting rods are relaxed successively in the blast or normal position of the vessel by means of hydraulic presses, are shifted to the new positions, and then brought back to the desired prestress conditions.
  • Oblong holes may be provided in the bearing surfaces for accommodating this purpose.
  • any permanent twisting of the bearing points at the attachment heads can be overcome by means of suitably beveled shims fitted in place after the tensioning of the support rods is removed.
  • FIG. 1 is an elevation view of a converter vessel supported within a carrying frame illustrating one embodiment of the present invention
  • FIG. 2 is a bottom view of the vessel and carrying frame shown in FIG. 1;
  • FIG. 3 is an elevation view of the converter vessel and another embodiment of the carrying frame embodying the present invention.
  • FIG. 4 is a top view of the arrangement illustrated in FIG. 3;
  • FIG. 5 illustrates a detail of the arrangement disclosed in FIG. 3 showing a member utilized for suspending the vessel within the carrying frame;
  • FIG. 6 is an elevation view of the converter vessel and still another embodiment of the carrying frame according to the present invention.
  • FIG. 7 is a top view of the arrangement shown in FIG. 6;
  • FIG. 8 is a side elevational view of the arrangement shown in FIG. 6;
  • FIG. 9 is a side view of a supporting rod.
  • FIG. 10 is an enlarged perspective view of one end of a supporting rod similar to the one illustrated in FIG. 9.
  • FIG. 1 a converter or metallurgical vessel 1 is shown in its normal upright position disposed within a carrying frame 2.
  • the vessel is constructed of a central cylindrical section, afrustoconically-shaped bottom section and a frustoconicallyshaped mouth section.
  • Extending laterally from the carrying frame 2 are pivot pins 3 and 4 for mounting the frame within a stationary tilting frame, which has not been shown so that the invention can be exhibited more clearly.
  • the vessel 1 can be tilted about its horizontal axis 5 from its normal upright position shown in FIG. 1 to a belly position, that is, through 90 where its normally vertical axis is in the horizontal position, and then continuing the tilting action the vessel can be inverted a full 180 so that its mouth end is directed downwardly.
  • a plurality of flexible supporting rods Positioned about the outer periphery of the vessel are a plurality of flexible supporting rods which form the connection between the vessel 1 and the carrying frame 2.
  • the supporting rods have a minimum bending resistance to assist in the indirect transmission of load from the vessel into the carrying frame.
  • the rods are of an elongated slender design and can be formed of a multiplicity of individual high-strength wires. Where individual wires are used the supporting rods may be in the form of sheathed or unsheathed cables where the wires each have a rectilinear axis and are disposed in parallel relationship with one another.
  • the carrying frame 2 consists of a bottom frame 7 having an approximately square configuration, see FIG. 2, and a rod system which extends laterally about the central portion of the vessel.
  • upright members 9 extend upwardly and are connected at their upper ends to the bottom part of the rod system 10.
  • the rod system 10 is composed of supports 11 to which the pivot pins 3 and 4 are connected and struts 12 which interconnect the supports 11 and one another. Additional struts 13 extend downwardly and connect the rod system to the bottom frame 7. In its normal upright position the axis 14 of the vessel is in the vertical position and the weight of the vessel rests on the bottom frame 7 of the carrying frame.
  • other supporting rods 16 extend in pairs on opposite sides of the vessel transversely of the tilting axis of the vessel and arranged in a plane extending perpendicularly to the vertical axis 14 of the vessel.
  • a pair of reinforcing rings 2!, 22 extend transversely about the vessel spaced apart in the vertical direction.
  • One pair of the supporting rods 16 extend between the reinforcing rings in tangential arrangement with the vessel and are connected to the vessel intermediate their ends. At their ends the rods 16 are secured by hearing clamps -20 to the carrying frame 2.
  • another pair of supporting rods 16 extend between bearing clamps 19 secured to the bottom frame 7 and are attached to the bottom of the vessel 1.
  • the vessel 1 When the vessel 1 is tilted from its normal upright position as shown in FIG. 1 to its inverted position, it passes through 180 and when it reaches the 90 point it is in the so-called belly position. As the vessel is tilted the melt contained within it changes position and the masonry lining becomes heated to considerably higher temperatures. In both of the vertical positions of the vessel and in the belly position it is required that the vessel be permitted to deform to the greatest degree possible without any obstruction or hindrance which might cause defects or failures in the vessel structure. As indicated above,
  • the vessel is supported by a number of supporting rods 15 angularly spaced about the base of the vessel in two pairs of diametrically opposite positions.
  • the load is carried by-the two pairs of supporting rods 16, one located adjacent the mouth of g the vessel and the other positioned at its base.
  • the I rods can be prestressed to support the vessel properly in its various tilted positions to assure that the different deformations caused by the thermal stressing are not hindered or obstructed by the carrying frame.
  • FIG. 3 another embodiment of the carrying frame is shown in which a different arrangement of the flexible supporting rods 15 and 16 is indicated.
  • the vessel 1 has the same configuration as in FIG. 1, however, the carrying frame does not extend above the cylindrical portion into the vicinity of the mouth portion of the vessel.
  • the carrying frame 2 consists of a frame member 23 of polygonal shape which laterally encloses the central portion of the vessel.
  • the frame member 23 is constructed of relatively rigid members fonned of channels or flat rod sections.
  • the bottom frame 7 Positioned below the frame member 23 is the bottom frame 7 which is secured to the bottom of the frame member 23 by means of the upright members 9.
  • Encircling the vessel above and below the position of the pivot pins 3 and 41 are two pairs of reinforcing rings 21,22.
  • the height of the frame member 23 depends on the position of the two pairs of reinforcing rings since the frame member 23 provides the end bearing support for the supporting rods 16 which extend between each pair of the reinforcing rings.
  • the supporting rods 16 extend tangentially to the vessel 1 and transversely of the tilting axis of the vessel. The prestressing force of the tangentially arranged supporting rods 16 is absorbed by the frame member 23.
  • the bottom frame 7 is comprised of a base plate 25 at its lower end and the vessel, in its normal position, rests on the base plate and is supported by the bottom frame.
  • an annular plate member 26 is located at the upper end of the bottom frame and has a cutout portion 27 through which the vessel extends.
  • the base plate 25 is supported by the flexible supporting rods 15.
  • the supporting rods 16 are shown extending across the frame member 23 and being secured into the bearing clamps mounted on the frame. At their points of tangency with the vessel the support rods are secured to the fixed attachment points 28. As can be noted in FIGS. 3 and 4 the supporting rods extend between each pair of reinforcing rings 21 and 22.
  • FIGS. 6 to 8 a third embodiment of the invention is illustrated in which the vessel 1 has the same general configuration, however, no bottom frame 7 is utilized for supporting the vessel in the upright position, as in the embodiments displayed in FIGS. 1 and 3.
  • the flexible supporting rods 15 and 16 are arranged to afford the indirect load transfer between the vessel and the carrying frame in the upright and various tilted positions of the vessel.
  • two pairs of reinforcing rings 21 and 22 extend about the central portion of the vessel with one pair being located above the pivot pins 3 and 4 and the other pair spaced below the pins.
  • each pair of reinforcing rings Positioned between each pair of reinforcing rings is a pair of tangentially arranged supporting rods 16 which extend transversely of the tilting axis of the vessel and are secured to the carrying frame by means of bearing clamps 19.
  • the carrying frame which is formed by the completely enclosing frame member 29, is the same as frame member 23 shown in FIG. 4.
  • the vessel In addition to the two pair of tangentially arranged supporting rods 16, in the inverted position the vessel is arranged to be supported-by the longitudinally extending supporting rods 15.
  • the supporting rods 15 are equiangularly spaced about the periphery of the vessel in banks of three.
  • the supporting rods 15, 16 have a special construction for the transmission of the load from the vessel into the carrying frame.
  • FIG. 9 a tangential rod 16, such as shown in FIG. 2, is illustrated. At its opposite ends the rod 16 is secured into clamping bearings 19 located on the bottom frame 7. Each clamping bearing 19 has a receiving head 32 with a like number of bores 33 through which the individual straight wires 34 forming the rod 16 are inserted. After the individual wires 34 are positioned within the bores 33 each of their ends is formed as an upset head to prevent their displacement from the bores. The number, cross-sectional size and material of the individual wires is determined in accordance with the load to be supported.
  • the outer circumferential periphery 35 of the receiving head 32 is threaded and is engaged within a similarly threaded inner surface of an outer clamping sleeve 36.
  • the initial tensioning forces are applied by a hydraulic machine of a known type, not shown in detail, threaded onto the outer threaded surface 38 of t outer sleeve 36.
  • a hydraulic machine of a known type, not shown in detail, threaded onto the outer threaded surface 38 of t outer sleeve 36.
  • the rod 16 is held in a prestressed condition and the tensioning forces can be removed. Accordingly, the hydraulic machine is unscrewed from the thread 38 on the outer sleeve 36.
  • the prestressed tangential rod 16 is not capable of transmitting the necessary forces for supporting the vessel load.
  • a sleeve 39 extends about the outer periphery of the group 40 of individual wires 34 forming a protective sheath.
  • the receiving head 32 can be extended inwardly along the rod to form a guide within the bottom frame 7.
  • the member threaded onto the outer sleeve 30 and indicated by the arrow forms a part of the hydraulic machine for stressing the rod and is easily transferable between clamping points.
  • a supporting device for a metallurgical vessel such as a converter used in making steel which deforms when exposed to thermal stresses generated in the steelmaking process, comprising a carrying frame member arranged to be positioned in spaced relationship to and laterally enclosing at least a part of the vessel, pivot members mounted on said frame and arranged to be supported in a structure for tilting said carrying frame about a horizontal axis, and flexible supporting rods secured to and disposed in spaced relationship about said carrying frame and arranged for attachment to the vessel for indirect transfer of stress therebetween, said supporting rods being disposed perpendicularly to one of the directions of deformation of the vessel.
  • a supporting device as set forth in claim 1, wherein said supporting rods are prestressed.
  • a supporting device as set forth in claim 2, wherein said supporting rods are formed of a plurality of individual wires having their axes disposed in parallel rectilinear relationship.
  • a supporting device as set forth-in claim 1, wherein said supporting rods comprising first supporting rods arranged initially to extend in parallel relationship with the vertical axis of the vessel in its normal upright position and second supporting rods arranged initially to extend in tangential relationship with the vessel and in a plane disposed perpendicularly to the vertical axis of the vessel.
  • a supporting device as set forth in claim 4, wherein said carrying frame comprising a number of interconnected strut members arranged to enclose the vessel intermediate its upper and lower ends, a plurality of upright supports secured to and extending downwardly from said carrying frame, and a bottom frame unit secured to the lower ends of said upright supports whereby in its normal upright position said bottom frame unit is arranged to support the vessel.
  • a supporting device as set forth in claim 5, wherein inclined strut members extending between said bottom frame unit and the lower portion of said carrying frame.
  • a supporting device as set forth in claim 5, wherein said first supporting rods are arranged to be secured to the lower part of the vessel and to extend downwardly therefrom and secured to said bottom frame unit whereby in the inverted position of the vessel the vessel is supported by said first supporting rods.
  • a supporting device as set forth in claim 7, wherein said bottom frame unit being substantially square, and a plurality of said first support rods being secured to each side of said bottom frame unit at a position intermediate its comers.
  • a supporting device as set forth in claim 5, wherein a first pair and a second pair of said second supporting rods being disposed in vertically spaced relationship, said first pair of said second supporting rods being secured at their ends to the upper portion of said carrying frame, and said second pair of said second supporting rods being secured at their ends to said bottom frame unit and being arranged to be positioned closely adjacent to and below the bottom of the vessel, both pairs of said second supporting rods being arranged to be attached to the vessel at positions intermediate their ends.
  • a supporting device as set forth in claim 9, wherein bearing clamps being secured to the upper portion of said carrying frame and to said bottom frame unit for securing said second supporting rods thereto.
  • a supporting device as set forth in claim 9, wherein a pair of reinforcing rings arranged to extend about the periphery of the vessel transverse to its vertical axis and being located at the upper end of said carrying frame, said reinforcing rings being spaced a'part vertically with one of said rings being located above said second support rods and the other being located below said second support rods at the upper end of said carrying frame.
  • a supporting device as set forth in claim 4, wherein said carrying frame comprises a closed polygonal-shaped member arranged to be disposed about the vessel intermediate its ends, uprights secured to and extending downwardly from said member, a bottom frame unit secured to the lower ends of said uprights and arranged to laterally enclose the lower end of said vessel, said bottom frame unit comprising a bottom plate for supporting the vessel in its normal vertical position.
  • a supporting device as set forth in claim 12, wherein an annular plate member extending across the upper end of said bottom frame unit and having a cutout therein arranged to fit the vessel and being spaced above said bottom plate.
  • a supporting device as set forth in claim 13, wherein a plurality of said first supporting rods being positioned along each side of said bottom frame unit and each of said first supporting rods being secured to said bottom plate at their lower ends and to said annular plate member at their upper ends for suspending the vessel within said carrying frame in the inverted position.
  • a supporting device as set forth in claim 14, wherein two pair of reinforcing rings being spaced about said vessel within the range of said polygonal-shaped member, one pair of said reinforcing rings being located adjacent the upper end of said member and the other pair of said reinforcing rings being located adjacent the lower end of said member.
  • a supporting device as set forth in claim 15, wherein two pair of said second supporting rods being secured to said carrying frame, one pair of said supporting rods extending across said frame and being arranged to be positioned tangential to the vessel and located between the upper pair of said reinforcing rings and the other pair of said second supporting rods extending across said frame and being arranged to be positioned tangential to the vessel and located between the lower pair of said reinforcing rings.
  • a supporting device as set forth in claim 16, wherein bearing clamps being mounted on said polygonal-shaped member for securing said second supporting rods thereto and a fixed attachment member arranged to be secured to said vessel for securing said second supporting rod to said vessel.
  • a supporting device as set forth in claim 4, wherein said carrying frame arranged to enclose the vessel intermediate and spaced from its lower and upper ends, said carrying frame comprising a continuous polygonal-shaped member laterally enclosing and spaced from the central portion of said vessel.
  • a supporting device as set forth in claim 18, wherein two pair of reinforcing rings being arranged to enclose the vessel with one pair of said reinforcing rings being located inwardly from and adjacent the upper end of said carrying frame and the other pair of said reinforcing rings being located inwardly from and adjacent the lower end of said carrying frame, and two pair of said second supporting rods extending across said carrying frame and arranged to be positioned tangentially to the vessel with one pair of said supporting rods being positioned between the upper pair of said reinforcing rings and the other pair of second supporting rods being positioned between the lower pair of said reinforcing rings, and said second supporting rods being disposed on opposite sides of said vessel.
  • a supporting device as set forth in claim 19, wherein a plurality of first supporting rods being located along each side of said carrying frame intermediate the corners thereof, first clamp bearings secured to one of the upper pairs of said reinforcing rings and second clamp bearings secured to the lower part of said carrying frame, said first supporting rods being secured to their upper ends to said first clamp bearings and at their lower ends to said second clamp bearings, whereby in the inverted position the vessel is arranged to be dependently supported from the lower part of said carrying frame.
  • a supporting device as setforth in claim 20, wherein the upper and lower edges of said carrying frame along each of its sides being cut out to afio'rd access to the said first and second clamp bearings securing the ends of said first supporting rods in place.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Earth Drilling (AREA)
US824839A 1968-06-29 1969-05-15 Tiltable support frame for a metallurgical vessel Expired - Lifetime US3572674A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1758581A DE1758581C3 (de) 1968-06-29 1968-06-29 Stützvorrichtung für ein metallurgisches Gefäß, insbesondere für einen Stahlwerkskonverter

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US3572674A true US3572674A (en) 1971-03-30

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US824839A Expired - Lifetime US3572674A (en) 1968-06-29 1969-05-15 Tiltable support frame for a metallurgical vessel

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JP (1) JPS4827564B1 (de)
DE (1) DE1758581C3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2345460A1 (fr) * 1976-03-25 1977-10-21 Boehringer Mannheim Gmbh Urease stabilisee
GB2344872A (en) * 1998-11-02 2000-06-21 Kvaerner Metals Davy Ltd Converter vessel support assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53165563U (de) * 1977-05-31 1978-12-25

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3201108A (en) * 1962-07-21 1965-08-17 Pintsch Bamag Ag Steel converter with loose supporting ring

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3201108A (en) * 1962-07-21 1965-08-17 Pintsch Bamag Ag Steel converter with loose supporting ring

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2345460A1 (fr) * 1976-03-25 1977-10-21 Boehringer Mannheim Gmbh Urease stabilisee
GB2344872A (en) * 1998-11-02 2000-06-21 Kvaerner Metals Davy Ltd Converter vessel support assembly

Also Published As

Publication number Publication date
DE1758581B2 (de) 1973-06-14
JPS4827564B1 (de) 1973-08-23
DE1758581C3 (de) 1974-01-10
DE1758581A1 (de) 1972-04-20

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