EP3209962B1 - Vorrichtung zum kühlen der lagerzapfen des verteilerschachtes eines schachtofens - Google Patents

Vorrichtung zum kühlen der lagerzapfen des verteilerschachtes eines schachtofens Download PDF

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Publication number
EP3209962B1
EP3209962B1 EP15790049.9A EP15790049A EP3209962B1 EP 3209962 B1 EP3209962 B1 EP 3209962B1 EP 15790049 A EP15790049 A EP 15790049A EP 3209962 B1 EP3209962 B1 EP 3209962B1
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EP
European Patent Office
Prior art keywords
trunnions
feed
trunnion
return ducts
shell
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Active
Application number
EP15790049.9A
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English (en)
French (fr)
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EP3209962A1 (de
Inventor
Paul Tockert
Harald Lang
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.)
Paul Wurth SA
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Paul Wurth SA
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Publication of EP3209962A1 publication Critical patent/EP3209962A1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/24—Cooling arrangements
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/10—Cooling; Devices therefor
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/18—Bell-and-hopper arrangements
    • C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/20—Arrangements of devices for charging

Definitions

  • the present invention relates to a device for cooling the support pins of a distribution chute of a charging installation of a shaft furnace, such as a blast furnace.
  • Such an installation typically comprises a fixed feed channel disposed vertically in the center of the top, centered on the vertical axis of the furnace, and a distribution trough for distributing in the furnace the charged materials arriving through said channel.
  • the dispensing chute is rotatable along said vertical and pivoting axis along a horizontal axis.
  • the chute is typically pivotally mounted along said horizontal axis in a ferrule mounted coaxially around said feed channel and rotatable along the vertical axis.
  • the chute is pivotally mounted in the shell by means of generally cylindrical pins of horizontal axis, on which the chute is secured and which are rotatably mounted along said horizontal axis in integral bearings of the ferrule.
  • the rotation of the ferrule and the pivoting of the chute are generally provided by gear means located in an annular chamber surrounding the ferrule.
  • the chute is fixed on both radially inner ends, directed towards the vertical axis of the furnace, journals, which are pivotally driven through the gear drive means located in said chamber surrounding the ferrule.
  • These drive means can act directly on the journals by meshing, or by means of arms or levers.
  • the journals therefore have an inner end portion which is located inside the ferrule, and which is therefore exposed directly to the intense heat prevailing in the shaft furnace. In addition, they also receive conduction heat from the chute, itself fully exposed to the heat of the oven.
  • rotating joints are used mounted axially on the outer end ends of the journals to provide the connection between the internal channels of the journals and the cooling water supply circuit, fixed on the ferrule, as notably indicated in DE4216166 .
  • the present invention is intended to provide a solution to this problem, so as to ensure proper cooling of the trunnions, and possibly the chute when it is not desired or it is impossible to connect the circuits water supply on the outer end of the trunnions. More generally, the invention aims to provide a new system for the supply and return cooling cooling water pins, to overcome the rotating joints conventionally used.
  • the invention relates to a device for cooling the support pins of a distribution chute of a charging installation of a shaft furnace, such as a blast furnace, the chute being mounted pivoting along a horizontal axis on a ferrule coaxial in the oven, the chute being rotatably connected to the journals driven in rotation by drive means, the journals having internal cooling channels.
  • the cooling device comprises supply and return ducts for the cooling water flowing in the inner channels, the supply and return ducts being connected to the trunnions by fittings fixed on the cylindrical surface of the trunnions, and the supply ducts and return are arranged to allow the rotary movement of the connectors around the pivot axis of the chute (that is to say around the axis of rotation of the trunnions), during pivoting thereof.
  • connection of the cooling ducts on the periphery of the trunnions thus makes it possible to bring the cooling water into the internal channels of the trunnions from the cylindrical outer surface of the trunnions, instead of providing this connection via the outer end face, which can therefore in particular be connected directly to the rotating drive means.
  • the supply and return ducts are flexible ducts connected directly to the trunnions by screwed connections, but could also be formed of rigid pipes connected with rotating connectors.
  • the journals are rotatably mounted inside bearings integral with the shell and the supply and return ducts pass through oblong slots provided in the bearings, the oblong slots extending circumferentially over a length predetermined arc so as to allow the rotary movement of the connections of the supply ducts and return in said lights during pivoting of the chute and trunnions.
  • Each trunnion may be directly rotatably connected at its end to the output shaft of a gear reducer located on the horizontal pivot axis of the trunnions.
  • the reducer can be a planetary reduction gear train directly driving the trunnions.
  • the journals are then linked directly to the output shafts of the planetary gearheads.
  • the aforementioned bearings, coaxially traversed by the trunnions do not necessarily have, in the spirit of the invention, a function of direct support and guiding in rotation of the trunnions.
  • the rotation guide and the support of the pins can be provided by the output shaft of the gearbox itself, output shaft which is guided in a housing of the gearbox, which housing is fixed on an outer end of said bearings.
  • a radial clearance is preferentially formed between the journals and the bearings, and a seal is arranged between the journal and the bearing, axially located between the end of the landing opening inside the shell and the lights where pass the connections of the flexible ducts.
  • Reducers also serving to support the trunnions could also be fixedly mounted relative to the ferrule by any suitable means, without requiring bearings as mentioned above, by means of only sealing means between the trunnions and the ferrule at the passage of trunnions through the wall of said ferrule.
  • the flexible conduits are connected to the journals at substantially diametrically opposite points.
  • the output shaft of the gearbox enters a bore of the trunnion, where it is connected in rotation, and the internal cooling channels extend in the trunnion, between the connections of the supply ducts and back, between the bore and the outer surface of the pin.
  • the internal cooling channels also extend between the bottom of the bore and the end of the trunnion bearing the chute.
  • the gearbox 3 comprises a housing 31 fixed on the outer end 21 of the bearing 2 by a flange 32.
  • the support trunnion 4 of the chute shown figure 2 , comprises towards its inner end 40, oriented towards the axis A1, a housing 41 arranged to receive support tabs of the chute, which are rigidly held in a manner known per se.
  • the other end of the pin 42 is rigidly connected to an output shaft of the gearbox 3, which output shaft is supported and guided in rotation in the housing 31.
  • the pin has a blind bore 45 of diameter adapted to receive with no radial clearance the end of the output shaft of the gear, the rotational connection of said shaft and the pin being provided for example by a key which shows the groove 48 formed in the bore 45.
  • the pin 4 is located in the bearing 2 but, as already mentioned, it is the rotational guidance of the output shaft of the reducer in the housing 31 which supports and guiding the rotation of the pin. Therefore, the trunnion does not need to be supported and guided in the bearing 2, and a radial clearance, for example of the order of 1 mm, is provided between the trunnion 4 and the bore of the bearing 2 crossed by said pin.
  • Oblong slots 22 are formed, in substantially diametrically opposed positions, in the wall of the bearing 2 between the ferrule 1 and the outer end 21 of the bearing 2.
  • Cooling water supply hoses 5 are connected in positions substantially diametrically opposed, on the trunnion, by connectors 51 screwed on the trunnion, providing the sealed connection between the flexible pipes 5 and the inner cooling channels 43, 47 of the trunnion, represented by the dotted lines 43.
  • the internal cooling channels extend in the trunnion, between the connectors 51, by portions of channels 43 extending longitudinally and / or in an arc of a circle between the bore 45 and the external surface of the trunnion.
  • a portion 47 of these channels extends, for example radially, between the bottom 46 of the bore 45 and the inner end 40 of the pin.
  • the opposite ends 52 of the hoses are connected to the fixed cooling circuit, not shown, housed in the chamber surrounding the shell 1 and rotating with said ferrule.
  • the connectors 51 pass into the slots 22, which extend over a sufficient arc length to allow free movement of the connectors 51 during pivoting of the journal and therefore of the chute. This arc length will therefore be at least equal to the value of the maximum swing angle in use of the chute, plus the length necessary to take account of the bulk of the connectors 51.
  • the corresponding range of rotation is typically 30 to 50 degrees, preferably 45 degrees.
  • a seal for example a braid sealing, is placed between the journal and the bearing, for example in a groove 44 provided for this purpose in the journal, the seal being axially located between the inner end of the bearing 2 and the slots 22 pierced in the wall of the bearing .

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Blast Furnaces (AREA)
  • General Details Of Gearings (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Mounting Of Bearings Or Others (AREA)

Claims (12)

  1. Vorrichtung zur Kühlung der Lagerzapfen (4) einer Verteilerrinne einer Anlage zur Beschickung eines Schachtofens, wie z. B. eines Hochofens, wobei die Rinne um eine horizontale Achse (A2) schwenkbar an einem zum Ofen koaxialen Mantelring (1) angebracht ist, wobei die Rinne drehfest mit den durch Antriebsmittel drehangetriebenen Zapfen verbunden ist, wobei die Zapfen innere Kühlkanäle (43) aufweisen, dadurch gekennzeichnet, dass die Kühlvorrichtung Zuführ- und Rückführleitungen (5) für in den inneren Kanälen fließendes Kühlwasser aufweist, wobei die Zuführ- und Rückführleitungen (5) mit den Zapfen (4) über Verbindungsstücke (51) verbunden sind, die an der Zylinderfläche der Zapfen befestigt sind, und dass die Zuführ- und Rückführleitungen (5) so angeordnet sind, dass sie eine Drehbewegung der Verbindungsstücke (51) um die Schwenkachse der Rinne beim Verschwenken der Rinne gestatten.
  2. Vorrichtung nach Anspruch 1, wobei die Zapfen drehbar in mantelringfesten Lagern (2) angeordnet und die Zuführ- und Rückführleitungen (5) durch in den Lagern (2) ausgebildete längliche Öffnungen (22) geführt sind, wobei sich die länglichen Öffnungen in Umfangsrichtung über eine vorbestimmte Bogenlänge erstrecken, um die Drehbewegung der Verbindungsstücke (51) der Zuführ- und Rückführleitungen (5) in den Öffnungen (22) beim Verschwenken der Rinne zu gestatten.
  3. Vorrichtung nach Anspruch 1 oder 2, wobei jeder Zapfen (4) mit seinem Ende (42) drehfest mit der Abtriebswelle eines auf der horizontalen Schwenkachse (A2) der Zapfen liegenden Untersetzungsgetriebes (3) verbunden ist.
  4. Vorrichtung nach Anspruch 3, wobei die rotierende Führung und die Lagerung der Zapfen (4) durch die Abtriebswelle des Untersetzungsgetriebes (3) gewährleistet ist, welche in einem Gehäuse (31) des Untersetzungsgetriebes geführt ist.
  5. Vorrichtung nach Anspruch 4, wobei das Gehäuse (31) des Untersetzungsgetriebes (3) an einem äußeren Ende (21) der Lager (2) befestigt ist.
  6. Vorrichtung nach Anspruch 4, wobei zwischen den Zapfen (4) und den Lagern (2) ein radiales Spiel vorgesehen ist.
  7. Vorrichtung nach Anspruch 6, wobei zwischen dem Zapfen (4) und dem Lager (2) eine Dichtung angeordnet ist, welche in Achsrichtung zwischen dem in den Mantelringinnenraum mündenden Ende des Lagers und den Öffnungen (22) liegt.
  8. Vorrichtung nach Anspruch 1, wobei die Zuführ- und Rückführleitungen flexible Leitungen (5) sind, die durch Schraubverbindungen (51) direkt mit den Zapfen (4) verbunden sind.
  9. Vorrichtung nach Anspruch 1, wobei die Zuführ- und Rückführleitungen (5) an im Wesentlichen diametral gegenüberliegenden Punkten mit den Zapfen (4) verbunden sind.
  10. Vorrichtung nach Anspruch 1, wobei der Mantelring (1) drehbar um die vertikale Ofenachse (A1) ausgebildet ist und die Zuführ- und Rückführleitungen (5) mit einem gegenüber dem Mantelring festen Kühlkreis verbunden sind, welcher in der den Mantelring umgebenden Kammer untergebracht ist und sich mit dem Mantelring dreht.
  11. Vorrichtung nach Anspruch 3, wobei die Abtriebswelle des Untersetzungsgetriebes in eine Bohrung des Zapfens, mit welchem die Welle drehfest verbunden ist, eindringt und die inneren Kühlkanäle (43) im Zapfen zwischen den Zuführ- und Rückführleitungen (51) zwischen der Bohrung (45) und der Außenfläche des Zapfens verlaufen.
  12. Vorrichtung nach Anspruch 11, wobei innere Kühlkanäle (47) auch zwischen dem Boden (46) der Bohrung (45) und dem Ende (40) des die Rinne tragenden Zapfens verlaufen.
EP15790049.9A 2014-10-22 2015-10-21 Vorrichtung zum kühlen der lagerzapfen des verteilerschachtes eines schachtofens Active EP3209962B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU92581A LU92581B1 (fr) 2014-10-22 2014-10-22 Dispositif de refroidissement des tourillons de support d'une goulotte de distribution d'un four à cuve
PCT/EP2015/074302 WO2016062740A1 (fr) 2014-10-22 2015-10-21 Dispositif de refroidissement des tourillons de support d'une goulotte de distribution d'un four à cuve

Publications (2)

Publication Number Publication Date
EP3209962A1 EP3209962A1 (de) 2017-08-30
EP3209962B1 true EP3209962B1 (de) 2018-04-04

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ID=51945980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15790049.9A Active EP3209962B1 (de) 2014-10-22 2015-10-21 Vorrichtung zum kühlen der lagerzapfen des verteilerschachtes eines schachtofens

Country Status (8)

Country Link
US (1) US10670339B2 (de)
EP (1) EP3209962B1 (de)
JP (1) JP6634079B2 (de)
KR (1) KR101760660B1 (de)
CN (1) CN107076516B (de)
LU (1) LU92581B1 (de)
TW (1) TWI656315B (de)
WO (1) WO2016062740A1 (de)

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2346805A (en) * 1942-11-09 1944-04-18 Randall Graphite Products Corp Liquid cooled bearing
BE788477Q (fr) * 1964-08-20 1973-01-02 Union Carbide Corp Perfectionnements aux dispositifs de chargement de four
US3975578A (en) * 1974-06-13 1976-08-17 Greenewald Jr Herbert Indirect arc metal melting furnace method
LU84520A1 (fr) * 1982-12-10 1984-10-22 Wurth Paul Sa Dispositif de refroidissement d'une installation de chargement d'un four a cuve
JPH0613241Y2 (ja) * 1988-09-21 1994-04-06 石川島播磨重工業株式会社 ベルレス炉頂装入装置における冷却水管の接続構造
LU87948A1 (fr) * 1991-06-12 1993-01-15 Wurth Paul Sa Dispositif de refroidissement d'une goulotte de distribution d'une installation de chargement d'un four a cuve
LU90294B1 (fr) * 1998-10-06 2000-04-07 Wurth Paul Sa Dispositif de répartition de matières en vrac
US20060162540A1 (en) * 2003-01-13 2006-07-27 Meintjes Pieter J Trunnion assembly
EP1801241A1 (de) 2005-12-23 2007-06-27 Paul Wurth S.A. Kühlvorrichtung einer Schachtofen-Beschickungsanlage mit rotierbarer Verteilerschurre
CN201149421Y (zh) * 2007-11-20 2008-11-12 王艳英 一种煤基气基两用的竖炉还原装置
CN201395610Y (zh) * 2009-05-18 2010-02-03 北京中冶设备研究设计总院有限公司 一种转炉耳轴内配管装置
LU91577B1 (en) * 2009-06-05 2010-12-06 Wurth Paul Device for distributing charge material in a shaftfurnace.
LU91645B1 (en) * 2010-01-27 2011-07-28 Wurth Paul Sa A charging device for a metallurgical reactor
CN103215395B (zh) * 2012-01-19 2015-04-29 秦皇岛秦冶重工有限公司 一种高炉炉顶溜槽布料器

Also Published As

Publication number Publication date
CN107076516B (zh) 2018-08-24
US10670339B2 (en) 2020-06-02
JP2017538088A (ja) 2017-12-21
JP6634079B2 (ja) 2020-01-22
LU92581B1 (fr) 2016-04-25
KR101760660B1 (ko) 2017-07-24
EP3209962A1 (de) 2017-08-30
US20170307293A1 (en) 2017-10-26
KR20170057442A (ko) 2017-05-24
TW201629417A (zh) 2016-08-16
TWI656315B (zh) 2019-04-11
WO2016062740A1 (fr) 2016-04-28
CN107076516A (zh) 2017-08-18

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