US3823930A - Support and drawing device for rotary converters and rotary converters so obtained - Google Patents

Support and drawing device for rotary converters and rotary converters so obtained Download PDF

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Publication number
US3823930A
US3823930A US00273588A US27358872A US3823930A US 3823930 A US3823930 A US 3823930A US 00273588 A US00273588 A US 00273588A US 27358872 A US27358872 A US 27358872A US 3823930 A US3823930 A US 3823930A
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US
United States
Prior art keywords
ring
support
container
wheels
rolling
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Expired - Lifetime
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US00273588A
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English (en)
Inventor
O Zinno
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GENOVESI COST MECC IND SpA
MECCANICHE IND GENOVESI CMI SP
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MECCANICHE IND GENOVESI CMI SP
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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
    • C21C5/50—Tilting mechanisms for converters

Definitions

  • the invention aims to obtain a rotary converter about a vertical axis at high speed (70-100 turns per minnte) for large quantities of steel per cast operation, said rotary converter though being of simple construction and sure working.
  • the above device is also characterized in that said .rolling ring is arranged fixedly correspondingly to the lower end of an annular supportstructure surrounding the converter casing, wherein the latter rests against
  • the invention relates to a support and drawing device for rotary converters and rotary convertersso obtained.
  • the invention aims at obtaining a rotary converter about a verticalaxisat high speed (70-100 turns per minute) for large quantities of steel per each cast operation, said rotary converter though being of simple construction and sure working.
  • the drawing and support device for rotary, converters of the type comprising two vertical columns arranged diametrally opposite to said converter, by said column being rotatably supported-twocoaxial pivots with horizontal axis for tilting the converter when the refining process is over, comprises an outer ring from which said two pivots project outwardly in a diametrally opposite position; wherein said outer ring comprises three inwardly projecting radial pivots, staggered for 120,
  • each of which is mounted directly at least a support wheel, or'in caseof more wheels through one or more beams each of them supporting on its turn two or more equally charged wheels.
  • the very converter resting on said wheels in a freely turnable way around its vertical axis, through a rolling ring projecting from'the outer surface of the casing thereof.
  • the above device is then characterized in that on the three pivots inwardly projecting from the inside of said outer ring are mounted, in a freely rocking way, three beams, and that on both ends of said beams, equidistant from its central fulcrum, are mounted two wheels in a freely turnable way; said rolling ring being thus supported by six equally charged wheels.
  • Said device is further characterized in that the s'urfaces of mutual contact of said rolling ring and said six wheels supported by. said three beams two by two, are
  • Said converter is then characterized in that at least one of each pair of wheels supported: by saidthree beams is a driving one.
  • the motion of said wheel is obtained by an engine and suitable gears rigidlysupported said annular structure througha suitable number of annular support structure rests against the. convertercasing correspondingly to its lower edge through radial catch elastic elements regularly distributed circumferentially.
  • said outer'ring is lowerly provided with a set of wheels with vertical axis and a cylindric side surface, regularly distributed circumferentially, said wheels being kept resting elastically against the cylindric outer surface of said rolling ring.
  • the above device' is also characterized in-that said vertical axis wheels are mounted on radially sliding slides, withrespect to the converter axis, within cavities arranged along the lower edge of said outer ring; whereinbetween the bottom of said slides and the bottom of said cavities within which said slides are slidable, are provided springs pushing said slides and thus said vertical axis wheels against theouter cylindric surface of said rolling ring.
  • the above'device is finally characterized in that it comprises locking means for fastening the outer ring to the annular support structure and thus to the converter,
  • said locking means consist of valve-actuating levers, controlled through suitable tie rods and regularly arranged circumferentially on the upper surface of said outer ring, said levers being rockingly mounted abouthorizontal pivots with respect to said outer ring; wherein the inner end'of said levers, that isthe one directed towards the converter,
  • FIG. 1 shows, in a very diagrammatically way, a side view of a converter according to the invention, parallely tov aplane passing through the tilting horizontal axis of the converter;
  • FIG. 2 is a diagrammatic view from the bottom along line ll-Il of FIG. 1;
  • FIG. .3 is a half-section of the claimed converter along line l'll- -lll of FIG. 2;
  • FIG. 4 is a broken viewalong line lV-IVof FIG. 3;
  • FIG 5 is a broken half-section .of the verter along'line V+V of FIG. 2 DESCRIPTION OF A' PREFERRED EMBODIMENT:
  • said pivots2 support on their turn a strong ring 3 heretofore called outer ring.
  • Said outerring 3 has a claimed condiameter larger than the diameter of the very converter 4.
  • three supports 5 staggered for 120, each of them carrying a pivot 8 having its axis arranged radially.
  • On each of said pivot 6 is mounted rockingly a beam 7 on which are mounted on pivots 8, equidistant therefrom, two wheels 9 comprising a rollingconical surface whose peak 10 is on the vertical simmetry axis 11 of converter 4 and is common to all the three pairs of wheels 9.
  • a rolling ring 12 made integral, in the way herebelow described, to the outer annular support 30 of said converter 4.
  • Said rolling ring 12 comprises in its lower portion a first conical rolling surface 13, having its peak coincident with the peak of the conical rolling surface of each of wheels 9.
  • Said rolling ring 12 is provided on its outer part with a second cylindric rolling surface 14.
  • said converter 4 through the rolling ring 12 integral thereto, rests on the three pairs of wheels 9 and the weight weighing on each pair of wheels 9 is equal to a third of the weight of the converter and its contents, as said three pairs of wheels 9 are exactly staggered with respect to each other for 120.
  • each pair of wheels 9 may rock freely about the corresponding pivot 6 together with the relevant beam 7, it results that the weight weighing on each wheel 9 will be always exactly equal to one sixth of the weight of the converter and its contents. That is true at any moment when the converter is still and vertical, even if owing to the thermal stresses of the converter the rolling surface 13 of the rolling ring 13 should not be an exactly conical surface withvertical axis.
  • each pivot 8 could on its turn carry a second beam on its turn supportingtwo wheels. In such a case, each wheel would support a smaller portion of the converter weight.
  • the rolling surfaces of wheels 9 and the ring 12 are carefully ground and the drawing into rotation of converter 4 on wheels 9 around the vertical axis 11 is performed by transforming into driving wheels at least three out of the six wheels 9 and by taking advantage of the adherence created by the converter weight on the three wheels 9 for originating the drawing of the inner ring 12 by the driving wheels 9.
  • all six wheels 9 are driving wheels, to this end each beam 7 carrier in relief position a pair of independent engines 20 which, through a reducing gear consisting of a pair of conical wheels 21 and 22, make rotate the associated wheel 9.-
  • pairs of engines 20 rock about pivot 6 integrally with the beam 7 and the wheels 9, and that does not cause any disturbance in the mechanical movement transmission for engine 20 to the associated wheel 9.
  • the rolling ring 12 is supported by a support annular structure 30 which at its bottom is rigidly connected to'the rolling ring 12. At its top said support annular structure 30 is connected to a set of brackets 31 fastened to the lateral surface of converter 4 through bolts 32.
  • the inner surface of said annular structure 30 is not in contact with the casing of converter 4.
  • the centering of said converter with respect to said annular structure 30 is obtained through a set of 1 elastic segments 33 arranged in suitable cavities on the lower edge of the inner surface of said annular structure 30. Said elastic segments 33 rest on one side against the annular structure 30 and on'the other side against the outer surface of the casing of converter 4.
  • the outer ring 3 comprises on its bottom a number of brackets 40 each of which is provided with a cavity, directed towards the converter axis, within which is radially movable a slip per 41 supporting rotatably a containing wheel 42, with vertical axis, whose rolling surface is cylindric and rolls freely on the cylindric rolling outer surface of ring 12.
  • Said slipper 41 and thus said wheel 42 are pushed elastically against ring 12 by springs 43 arranged on the bottom of the cavity within which said slipper 41 is slid- I able radially to the vertical axis of converter 4.
  • the resilient elements 43 and 33 allow to absorb possible radial shocks to which is subject the converter at the end and beginning of its revolution about the vertical axis as well as during operation, said shocks being caused for instance by an irregular distribution of the load inside the converter.
  • the containing wheels 42 have also the object of blocking converter 4, substantially resting through brackets'31 on said annular structure 30, during its tilting about the horizontal axis of pivots 2, when the refining process is over.
  • said annular structure 30 is temporarily made integral with the outer ring 3, through locking levers mounted on pivots 51 which are supported by brackets 52 arranged on the upper surface of the outer ring 3.
  • the locking levers 50 with their inner end 53 press onto the upper surface of said annular structure 30 when, correspondingly to the outer end 54 of levers 50, an upwardly directed force, for instance through rods 55, is exerted.
  • a single wheel 9 may be mounted directly on pivot 6; in this case too, the converter will be supported on three points in an evenly defined way.
  • beams 6 may support, by means of one or more secondary beams, three or four or more wheels 9, each of which carries a load equal to the one carried by the remaining ones.
  • the converter would be supported in a statically defined way on the three pivots 3.
  • a rotary converter comprising a circular sectioned container, a rolling ring defining a conical rolling surface the apex of which is coincident with the axis of said container and a cylindrical rolling surface coaxial with said container, bracket means for supporting said ring on said container, resilient means between said ring and said container maintaining said ring and container coaxial, a support ring encircling said container and being mounted upon diametrically opposed pivots for tilting said container, said support ring comprising three equiangularly disposed and radially inwardly projecting pivots each of which carries at least one support wheel, said support wheels being frustoconical, having their apices coincident with the apex of said conical rolling surface of said rolling ring, said wheels cooperating with said conical rolling surface to support said container during rotation thereof, drive means operatively connected to said support wheels to rotate those wheels and the container supported thereon, said support ring having spaced guide wheels thereon, said guide wheels being cylindrical and mounted for rotation about axes parallel
  • a rotary converter as claimed in claim 1 wherein said radially inwardly projecting pivots each support a beam, each of said beams having two support wheels thereon said support wheels being equally spaced from the pivot upon which the beam is mounted.
  • a rotary converter as claimed in claim 1 wherein said bracket means supporting said rolling ring are disposed at the top of said ring and said ring is suspended therefrom, said locking means comprising a lever pivoted to said support ring and means operable to press said lever into firm engagement with said rolling ring.

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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)
  • Manufacture And Refinement Of Metals (AREA)
US00273588A 1971-09-29 1972-07-20 Support and drawing device for rotary converters and rotary converters so obtained Expired - Lifetime US3823930A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT12955/71A IT938693B (it) 1971-09-29 1971-09-29 Dispositivo di supporto e trascina mento per convertitori rotanti e convertitori rotanti in tal modo ottenuti

Publications (1)

Publication Number Publication Date
US3823930A true US3823930A (en) 1974-07-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00273588A Expired - Lifetime US3823930A (en) 1971-09-29 1972-07-20 Support and drawing device for rotary converters and rotary converters so obtained

Country Status (10)

Country Link
US (1) US3823930A (enExample)
JP (1) JPS4841907A (enExample)
BE (1) BE786764A (enExample)
CA (1) CA989166A (enExample)
DE (1) DE2239234A1 (enExample)
ES (1) ES405858A1 (enExample)
FR (1) FR2154433B1 (enExample)
GB (1) GB1400068A (enExample)
IT (1) IT938693B (enExample)
NL (1) NL7210546A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3786308A1 (de) * 2019-08-26 2021-03-03 SMS Group GmbH Konverter mit wechselbarem gefäss

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4298378A (en) * 1978-12-22 1981-11-03 Kawasaki Jukogyo Kabushiki Kaisha Rotary steel converter, method of making steel there-with and method of applying refractory lining to converter

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB776962A (en) * 1955-07-29 1957-06-12 Pintsch Bamag Ag Improvements in metallurgical converters
US3031177A (en) * 1958-09-08 1962-04-24 Hofmeister Hans Rotary converter arrangements
GB918306A (en) * 1958-05-10 1963-02-13 Demag Ag Improvements in metallurgical furnaces
US3144496A (en) * 1960-02-20 1964-08-11 Demag Ag Converter support
DE1175706B (de) * 1960-07-23 1964-08-13 Demag Ag Um seine Laengsachse rotierender metallurgischer Ofen mit einer stossdaempfenden Vorrichtung fuer seitlich angeordnete Rollen
US3163696A (en) * 1961-05-09 1964-12-29 Stora Kopparbergs Bergslags Ab Arrangement for tiltable furnaces
DE1302717B (enExample) * 1970-11-26

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1302717B (enExample) * 1970-11-26
GB776962A (en) * 1955-07-29 1957-06-12 Pintsch Bamag Ag Improvements in metallurgical converters
GB918306A (en) * 1958-05-10 1963-02-13 Demag Ag Improvements in metallurgical furnaces
US3031177A (en) * 1958-09-08 1962-04-24 Hofmeister Hans Rotary converter arrangements
US3144496A (en) * 1960-02-20 1964-08-11 Demag Ag Converter support
DE1175706B (de) * 1960-07-23 1964-08-13 Demag Ag Um seine Laengsachse rotierender metallurgischer Ofen mit einer stossdaempfenden Vorrichtung fuer seitlich angeordnete Rollen
US3163696A (en) * 1961-05-09 1964-12-29 Stora Kopparbergs Bergslags Ab Arrangement for tiltable furnaces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3786308A1 (de) * 2019-08-26 2021-03-03 SMS Group GmbH Konverter mit wechselbarem gefäss

Also Published As

Publication number Publication date
GB1400068A (en) 1975-07-16
JPS4841907A (enExample) 1973-06-19
FR2154433A1 (enExample) 1973-05-11
IT938693B (it) 1973-02-10
DE2239234A1 (de) 1973-04-05
CA989166A (fr) 1976-05-18
FR2154433B1 (enExample) 1976-03-12
BE786764A (fr) 1972-11-16
NL7210546A (enExample) 1973-04-02
ES405858A1 (es) 1976-01-16

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