US3501136A - Device for lifting and lowering oxygen lances for top-blowing converters - Google Patents

Device for lifting and lowering oxygen lances for top-blowing converters Download PDF

Info

Publication number
US3501136A
US3501136A US675513A US3501136DA US3501136A US 3501136 A US3501136 A US 3501136A US 675513 A US675513 A US 675513A US 3501136D A US3501136D A US 3501136DA US 3501136 A US3501136 A US 3501136A
Authority
US
United States
Prior art keywords
cable
lifting
auxiliary
lance
drum
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
US675513A
Other languages
English (en)
Inventor
Otto Schweng
Karl Steinmair
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.)
Voestalpine AG
Voest AG
Original Assignee
Voestalpine AG
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 Voestalpine AG filed Critical Voestalpine AG
Application granted granted Critical
Publication of US3501136A publication Critical patent/US3501136A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • C21C5/4606—Lances or injectors
    • C21C5/462—Means for handling, e.g. adjusting, changing, coupling

Definitions

  • the invention comprises a means for safeguarding against cable breaks including a service cable carrying the load during normal operation and a spring-mounted auxiliary cable which takes over the load when said service cable breaks, both cables being wound on a common drum.
  • a limit switch is arranged so as to be actuated by said spring when the load is transferred to said auxiliary cable, whereby movement of the lance is arrested.
  • the invention relates to a device for lifting and lowering oxygen lances for top-blowing converters, said de vice comprising a means for safeguarding against cable breaks.
  • oxygen lances are used which can be insertedinto the crucible or converter from above.
  • Such lances must retain their functioning ability even when a cable breaks during a heat, and it is not sufficient that a safeguarding means prevents the lance from dropping into the converter, but provision must also be made that the heat can be finished, whereupon the lance is lifted, e.g. by means of a hand-operated winch, and the charge is subsequently teemed olf.
  • a device In smaller converter plants, a device is frequently used which is also provided with a service cable and an auxiliary cable, each having separate cable drums.
  • the service cable winds up on the electrically driven drum (electric hoist), while the auxiliary cable runs over an auxiliary cable drum and is stressed :by means of a counterweight.
  • the auxiliary cable drum is provided with a shoe brake, which locks when the service cable breaks and thus arrests the load.
  • a transmission, a ratchet catch and a handcrank on the auxiliary cable drum ensure its function as an emergency hand winch.
  • the second-named device requires a separate auxiliary cable drum as well as a counterweight.
  • the invention has as its object to avoid these drawbacks and, in particular, to provide a device including a lance safety means requiring only one single cable drum.
  • the device of the invention for lifting and lowering an oxygen lance for crucibles or converters compris- 3,501,136 Patented Mar. 17, 1970 ing a means for safeguarding against cable breaks which has a service cable and an auxiliary cable, is characterized in that both cables are wound on a single drum and that during normal operation the load, owing to the limitedly resilient spring support of the auxiliary cable or its return means, is carried mainly .by the service cable and only to a minor extent by the auxiliary cable.
  • the spring reaction serves to operate control means.
  • FIGS. 1 and 2 show a lateral and a front view, re spectively, of a single-track embodiment
  • FIGS. 3 and 4 are similar lateral and front views showing a double-track embodiment
  • FIG. 5 is a schematic diagram of a drive control circuit for either of the two embodiments.
  • numeral 1 denotes the lance which is guided along a vertical guidance by means of a lance carriage.
  • Numeral 2 denotes the service cable and 4 the auxiliary cable. Both cables are wound up on drum 3.
  • the drive 8 e.g., an electric motor, for the cable drum 3 is energized from power source 10 for normal lifting and lowering operations by a suitable drive control 9.
  • the guide pulley 5b of the service cable is stationarily mounted, While the guide pulley 5a of the auxiliary cable is movable in vertical direction and is influenced by a spring 6.
  • the auxiliary cable carries only a minor part of the load, depending on the resiliency of the spring 6 and on the resulting position of the guide pulley 5a, as long as the service cable is in order.
  • FIGS. 3 and 4 works in a similar manner:
  • the guide pulleys 5a and 5b are arranged on the lance carriage forming a double roller haul.
  • the cables are fixed to the drum 3 with one end, on the other side, the service cable is fixed to the upper end of the lance carriage, while the auxiliary cable is suspended on spring 6.
  • the arrangement can also be used as a slack rope safeguarding means which comes into effect for instance when the lance meets with a solid obstacle during lowering.
  • both cables are relieved of their load, the service cable slackens completely, due to its fixed mounting, while the spring-mounted auxiliary 3 4 v. cable enables complete expansion of the spring 6, wherespring beyond its normal operating condition for stopby the limit switch is operated. ing movement of said lance.
  • apparatus 1,300,647 4/1919 Price 187-71 for lifting and lowering an oxygen lance vertically into 2,113,468 4/1938 Ross 187--7l and out of said converter comprising, a service cable 10 3,007,691 11/ 1961 RineSCOttand an auxiliary cable supporting said lance, a cable FOREIGN PATENTS drum, both said service and auxiliary cables being wound on said drum, said auxiliary cable being supported by means including a limitedly resilient spring so that during 15 normal operation, the load is carried mainly by said HARVEY HORNSBY Primary Examiner service cable and only to a minor extent by said auxiliary cable, and control means responsive to both predeter- US. Cl. X.R.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
US675513A 1966-11-04 1967-10-16 Device for lifting and lowering oxygen lances for top-blowing converters Expired - Lifetime US3501136A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT1021466A AT264561B (de) 1966-11-04 1966-11-04 Vorrichtung zum Heben und Senken von Sauerstofflanzen für Aufblasekonverter

Publications (1)

Publication Number Publication Date
US3501136A true US3501136A (en) 1970-03-17

Family

ID=3620717

Family Applications (1)

Application Number Title Priority Date Filing Date
US675513A Expired - Lifetime US3501136A (en) 1966-11-04 1967-10-16 Device for lifting and lowering oxygen lances for top-blowing converters

Country Status (6)

Country Link
US (1) US3501136A (de)
AT (1) AT264561B (de)
BE (1) BE705825A (de)
DE (1) DE1583312B1 (de)
GB (1) GB1205976A (de)
LU (1) LU54527A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645519A (en) * 1969-07-31 1972-02-29 Voest Ag Rope or chain rupture safety device
US3710424A (en) * 1970-08-18 1973-01-16 Voest Ag Braking means for a flexible connecting element which is resiliently supported at one end and may be stressed in shocks
US4441701A (en) * 1981-09-21 1984-04-10 Estel Hoogovens B.V. Apparatus for supporting and guiding a sub-lance
US5333842A (en) * 1992-01-24 1994-08-02 Paul Wurth S.A. Apparatus for supplying media to a blowing lance

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1035230A (en) * 1911-10-24 1912-08-13 Charles O Pearson Traction-elevator.
US1270716A (en) * 1917-01-16 1918-06-25 Stephen Albert Flannery Safety apparatus for elevators.
US1300647A (en) * 1919-01-15 1919-04-15 Thomas Price Mine-cage hoist.
FR818634A (fr) * 1936-03-03 1937-09-30 Carl Flohr Ag Ascenseur ou élévateur d'immeuble
US2113468A (en) * 1936-12-23 1938-04-05 Ross Robert Galloway Wardrobe for schoolhouses
GB521515A (en) * 1938-11-19 1940-05-23 Austin Motor Co Ltd Novel or improved safety device for use with hoists
US3007691A (en) * 1958-05-30 1961-11-07 Voest Ag Blowing device for refining crude iron

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT221125B (de) * 1960-07-20 1962-05-10 Voest Ag Ketten- bzw. Seilrißsicherungseinrichtung bei Blaseinrichtungen
FR1398127A (fr) * 1964-03-27 1965-05-07 Fives Lille Cail Dispositif de support de lance à oxygène pour aciérie

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1035230A (en) * 1911-10-24 1912-08-13 Charles O Pearson Traction-elevator.
US1270716A (en) * 1917-01-16 1918-06-25 Stephen Albert Flannery Safety apparatus for elevators.
US1300647A (en) * 1919-01-15 1919-04-15 Thomas Price Mine-cage hoist.
FR818634A (fr) * 1936-03-03 1937-09-30 Carl Flohr Ag Ascenseur ou élévateur d'immeuble
US2113468A (en) * 1936-12-23 1938-04-05 Ross Robert Galloway Wardrobe for schoolhouses
GB521515A (en) * 1938-11-19 1940-05-23 Austin Motor Co Ltd Novel or improved safety device for use with hoists
US3007691A (en) * 1958-05-30 1961-11-07 Voest Ag Blowing device for refining crude iron

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645519A (en) * 1969-07-31 1972-02-29 Voest Ag Rope or chain rupture safety device
US3710424A (en) * 1970-08-18 1973-01-16 Voest Ag Braking means for a flexible connecting element which is resiliently supported at one end and may be stressed in shocks
US4441701A (en) * 1981-09-21 1984-04-10 Estel Hoogovens B.V. Apparatus for supporting and guiding a sub-lance
US5333842A (en) * 1992-01-24 1994-08-02 Paul Wurth S.A. Apparatus for supplying media to a blowing lance

Also Published As

Publication number Publication date
DE1583312B1 (de) 1972-05-31
AT264561B (de) 1968-09-10
LU54527A1 (de) 1967-11-27
BE705825A (de) 1968-03-01
GB1205976A (en) 1970-09-23

Similar Documents

Publication Publication Date Title
GB1194618A (en) Construction Elevator System
AU4681797A (en) Procedure and apparatus for the measurement of elevator load
US3501136A (en) Device for lifting and lowering oxygen lances for top-blowing converters
GB1021153A (en) Improvements in and relating to load-lifting apparatus
UA15736A (uk) Грейферhа устаhовка
US3710424A (en) Braking means for a flexible connecting element which is resiliently supported at one end and may be stressed in shocks
GB940877A (en) Elevating load platforms for attachment to vehicles
US1890539A (en) Electrical control means for trolley buckets
SU996438A1 (ru) Устройство дл пробивки сливных отверстий в корках щлаковозных ковшей
US3393906A (en) Rope or chain rupture safety device on blowing devices for refining crude iron
SU1296503A1 (ru) Грузоподъемное устройство
SU660913A1 (ru) Устройство дл навески и смены канатов на многоканатной подъемной установке
GB783408A (en) Improvements in lifting, lowering and hauling and especially in mine hoisting
SU1175850A1 (ru) Подъемник
GB1287619A (en) Hoist safety device
KR200180821Y1 (ko) 천정기중기의 보권와이어 탈선 경보장치
GB1138157A (en) Improved pulley block
SU1093686A1 (ru) Подъемник
SU1041481A1 (ru) Строительный подъемник
SU893787A1 (ru) Шахтна подъемна установка
SU1440855A1 (ru) Механизм перемещени грузовой каретки грузоподъемного крана
SU467574A1 (ru) Полиспастна система к грузоподъемному крану
GB240260A (en) Improvements in and relating to cranes and the like
SU401554A1 (ru) Канатная подвесная дорога маятникового типа
SU136275A1 (ru) Противозатаскиватель талевого блока под кронблок буровой