EP3209962A1 - Device for cooling a shaft furnace distribution chute support journals - Google Patents

Device for cooling a shaft furnace distribution chute support journals

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Publication number
EP3209962A1
EP3209962A1 EP15790049.9A EP15790049A EP3209962A1 EP 3209962 A1 EP3209962 A1 EP 3209962A1 EP 15790049 A EP15790049 A EP 15790049A EP 3209962 A1 EP3209962 A1 EP 3209962A1
Authority
EP
European Patent Office
Prior art keywords
cooling
chute
supply
return
journals
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.)
Granted
Application number
EP15790049.9A
Other languages
German (de)
French (fr)
Other versions
EP3209962B1 (en
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
Original Assignee
Paul Wurth SA
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 Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP3209962A1 publication Critical patent/EP3209962A1/en
Application granted granted Critical
Publication of EP3209962B1 publication Critical patent/EP3209962B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 sides on radially inner ends, directed towards the vertical axis of the furnace, journals, which are pivotally driven by means of the gear drive means located in said room surrounding the shell.
  • These drive means can act directly on the journals by meshing, or by means of arms or levers.
  • the trunnions 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 especially stated 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 water supply circuits to 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 pivotally mounted 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 by the face external frontal, 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 predetermined arc length so as to allow the rotational movement of the connections of the supply and return ducts in said lights during the pivoting of the chute and trunnions.
  • Each pin can be linked directly in rotation by its end on the output shaft of a gear reducer located on the horizontal pivot axis of the journals.
  • 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 bearings mentioned above, coaxially traversed by the trunnions do not necessarily have, in the spirit of the invention, a direct support function and guide 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 bearing opening inside the shell and the lights where it passes. the connections of the flexible ducts.
  • the reducers also serving as trunnion support 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. passing the pins through the wall of said ferrule.
  • the flexible ducts 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 into the trunnion, between the couplings of the ducts. supply and return, between the bore and the outer surface of the trunnion.
  • the internal cooling channels also extend between the bottom of the bore and the end of the trunnion carrying the gou burbot.
  • Fig. 1 is a perspective view of one of the two devices for supporting and driving in pivoting of the delivery channel of a blast furnace;
  • Fig. 2 is a perspective view of the single spigot showing its means of connection with an output shaft of a rotating drive reducer and its internal cooling circuits and water supply hoses. Description of a preferred execution
  • FIG. 1 we see the shell 1 of the blast furnace loading device, rotatable along a vertical axis A1 of the blast furnace, and on which is secured a bearing 2, carrying at its end a gearbox 3 for the pivoting drive of the chute, not shown, along a horizontal axis A2.
  • 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 in FIG. 2, has towards its inner end 40, oriented towards the axis A1, a housing 41 arranged to receive support tabs of the trough, which are rigidly held therein, 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 trunnion comprises a blind bore 45 of diameter adapted to receive without radial play the end of the output shaft of the reducer, the rotational connection of said shaft and the trunnion being ensured for example by a key which can be seen 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 guide of the output shaft of the gearbox 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 opposite positions, in the wall of the bearing 2 between the shell 1 and the outer end 21 of the bearing 2.
  • Cooling water supply hoses 5 are connected, in substantially diametrically opposite positions, on the trunnion, by connectors 51 screwed on the trunnion, ensuring the sealed connection between the flexible pipes 5 and the inner cooling channels 43, 47 of the trunnion, represented by the dotted lines 43.
  • Internal channels in the spigot, between the connectors 51, the channel portions 43 extend longitudinally and / or in an arc 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 pivot angle in use of the chute, plus the length necessary to take account of the bulk of the connectors 51.
  • the corresponding rotation range is typically 30 to 50 degrees, preferably 45 degrees.
  • a seal by a sealing strip, is placed between the journal and the bearing, for example in a groove 44 provided for this purpose in the journal, this seal being axially located between the inner end of the bearing 2 and the slots 22 pierced in the bearing wall.

Abstract

Device for cooling the support journals (4) of a distribution chute of an installation for charging a shaft furnace, such as a blast furnace, the chute being mounted with the ability to pivot about a horizontal axis (A2) on a ring (1) coaxial with the furnace, the chute being connected in rotation to the journals which are rotated by drive means, being for example connected directly in terms of rotation via their ends (42) to output shafts of reduction gear (3) and comprising internal cooling ducts (43). The cooling device comprises feed and return pipes (5) for the cooling water circulating through the internal ducts, the feed and return pipes (5) being connected to the journals (4) by couplings (51) fixed to the cylindrical surface of the journals, and the feed and return pipes (5) are designed to allow the rotary movement of the couplings (51) about the axis of pivoting of the chute when the chute pivots, notably by passing through oblong slots (22) extending circumferentially in the wall of bearings (2) supporting the driving reduction gear.

Description

Dispositif de refroidissement des tourillons de support  Cooling device for support journals
d'une goulotte de distribution d'un four à cuve  a distribution chute of a shaft furnace
Domaine technique Technical area
[0001 ] La présente invention concerne un dispositif de refroidissement des tourillons de support d'une goulotte de distribution d'une installation de chargement d'un four à cuve, tel qu'un haut fourneau. 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.
Etat de la technique State of the art
[0002] Une telle installation comprend typiquement un canal d'alimentation fixe disposé verticalement au centre du gueulard, centré sur l'axe vertical du four, et une goulotte de distribution pour répartir dans le four les matières chargées arrivant par ledit canal. Pour permettre de distribuer la matière chargée de manière adéquate, la goulotte de distribution est rotative selon ledit axe vertical et pivotante selon un axe horizontal. A cette fin, la goulotte est typiquement montée pivotante selon ledit axe horizontal dans une virole montée coaxialement autour dudit canal d'alimentation et rotative selon l'axe vertical. La goulotte est montée pivotante dans la virole par l'intermédiaire de tourillons de forme générale cylindrique d'axe horizontal, sur lesquels la goulotte est solidarisée et qui sont montés tournant selon ledit axe horizontal dans des paliers solidaires de la virole. La rotation de la virole et le pivotement de la goulotte sont généralement assurés par des moyens à engrenages situés dans une chambre annulaire entourant la virole. 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. To enable the dispensed material to be dispensed adequately, the dispensing chute is rotatable along said vertical and pivoting axis along a horizontal axis. To this end, 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.
[0003] La goulotte est fixée de part et d'autre sur des extrémités radialement internes, dirigées vers l'axe vertical du four, des tourillons, lesquels sont entraînés en pivotement par l'intermédiaire des moyens d'entraînement à engrenage situés dans ladite chambre entourant la virole. Ces moyens d'entraînement peuvent agir directement sur les tourillons par engrènement, ou par l'intermédiaire de bras ou leviers. The chute is fixed on both sides on radially inner ends, directed towards the vertical axis of the furnace, journals, which are pivotally driven by means of the gear drive means located in said room surrounding the shell. These drive means can act directly on the journals by meshing, or by means of arms or levers.
[0004] Les tourillons ont donc une partie d'extrémité interne qui est située à l'intérieur de la virole, et qui est donc exposée directement à la chaleur intense régnant dans le four à cuve. De plus, ils reçoivent également par conduction de la chaleur provenant de la goulotte, elle-même totalement exposée à la chaleur du four. Pour assurer le refroidissement des tourillons, et éventuellement de la goulotte, il est connu de faire circuler de l'eau de refroidissement dans des canaux ménagés dans les tourillons, l'eau de refroidissement étant amenée dans les tourillons par leurs extrémités frontales extérieures, opposées aux extrémités internes sur lesquelles la goulotte est fixée. Généralement, du fait que les tourillons sont rotatifs, on utilise des joints tournants montés axialement sur les extrémités frontales extérieures des tourillons pour assurer la liaison entre les canaux internes des tourillons et le circuit d'alimentation en eau de refroidissement, fixe sur la virole, comme notamment indiqué dans DE4216166. The trunnions 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. To ensure the cooling of the trunnions, and possibly of the chute, it is known to circulate cooling water in channels formed in the trunnions, the cooling water being fed into the trunnions by their opposite outer end ends. at the inner ends on which the chute is fixed. Generally, because the journals are rotatable, 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 especially stated in DE4216166.
[0005] Pour assurer le pivotement de la goulotte, il a été développé récemment un système d'entraînement par réducteurs épicycloïdaux, qui sont directement liés aux extrémités frontales externes des tourillons. Pratiquement, les tourillons sont directement liés sur l'arbre de sortie des réducteurs. Il s'ensuit qu'il n'y a plus de faces d'extrémités frontales des tourillons accessibles, et donc que le circuit de refroidissement ne peut plus être connecté aux canaux de refroidissement des tourillons comme dans l'art antérieur, par des joints tournants fixés sur lesdites extrémités frontales externes. To ensure the pivoting of the chute, it was recently developed a drive system by epicyclic reducers, which are directly related to the outer ends of the trunnions. In practice, the journals are directly linked to the gearbox output shaft. It follows that there are no longer end faces of the accessible trunnions, and therefore that the cooling circuit can no longer be connected to the trunnion cooling channels as in the prior art, by joints turners attached to said outer end ends.
Objet de l'invention Object of the invention
[0006] La présente invention a notamment pour objectif de fournir une solution à ce problème, de manière à pouvoir assurer un refroidissement correct des tourillons, et éventuellement de la goulotte, lorsqu'il n'est pas souhaité ou qu'il est impossible de connecter les circuits d'alimentation en eau sur l'extrémité externe des tourillons. Plus généralement, l'invention a pour objectif de proposer un nouveau système permettant l'alimentation et le retour d'eau de refroidissement des tourillons, permettant de s'affranchir des joints tournants classiquement utilisés. 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 water supply circuits to 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.
[0007] Avec ces objectifs en vue, l'invention a pour objet un dispositif de refroidissement des tourillons de support d'une goulotte de distribution d'une installation de chargement d'un four à cuve, tel qu'un haut fourneau, la goulotte étant montée pivotante selon un axe horizontal sur une virole coaxiale au four, la goulotte étant liée en rotation sur les tourillons entraînés en rotation par des moyens d'entraînement, les tourillons comportant des canaux internes de refroidissement. Selon l'invention, le dispositif de refroidissement comporte des conduits d'alimentation et de retour pour l'eau de refroidissement circulant dans les canaux interne, les conduits d'alimentation et de retour étant connectés sur les tourillons par des raccords fixés sur la surface cylindrique des tourillons, et les conduits d'alimentation et de retour sont agencés pour permettre le déplacement rotatif des raccords, autour de l'axe de pivotement de la goulotte (c'est-à-dire autour de l'axe de rotation des tourillons), lors des pivotements de celle-ci. With these objectives in view, 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 pivotally mounted 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. According to the invention, 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.
Description générale de l'invention  General description of the invention
[0008] Le raccordement des conduits de refroidissement sur la périphérie des tourillons permet donc d'amener l'eau de refroidissement dans les canaux internes des tourillons à partir de la surface extérieure cylindrique des tourillons, au lieu d'assurer ce raccordement par la face frontale externe, laquelle peut donc notamment être raccordée directement aux moyens d'entraînement en rotation. The 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 by the face external frontal, which can therefore in particular be connected directly to the rotating drive means.
[0009] Préférentiellement, les conduits d'alimentation et de retour sont des conduits flexibles raccordés directement sur les tourillons par des raccords vissés, mais pourraient aussi être formés de tuyaux rigides liés avec des raccords tournants. Preferably, 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.
[0010] Selon une disposition particulière, les tourillons sont montés tournant à l'intérieur de paliers solidaires de la virole et les conduits d'alimentation et de retour passent à travers des lumières oblongues ménagées dans les paliers, les lumières oblongues s'étendant circonférentiellement sur une longueur d'arc prédéterminée de manière à autoriser le déplacement rotatif des raccords des conduits d'alimentation et de retour dans les dites lumières lors des pivotements de la goulotte et des tourillons. According to a particular arrangement, 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 predetermined arc length so as to allow the rotational movement of the connections of the supply and return ducts in said lights during the pivoting of the chute and trunnions.
[001 1 ] Chaque tourillon peut être lié directement en rotation par son extrémité sur l'arbre de sortie d'un réducteur à engrenage situé sur l'axe de pivotement horizontal des tourillons. Le réducteur peut être un réducteur à train épicycloïdal entraînant directement les tourillons. Les tourillons sont alors liés directement sur les arbres de sortie des réducteurs à train épicycloïdaux. [001 1] Each pin can be linked directly in rotation by its end on the output shaft of a gear reducer located on the horizontal pivot axis of the journals. 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.
[0012] On comprendra que les paliers mentionnés précédemment, traversés coaxialement par les tourillons, n'ont pas nécessairement, dans l'esprit de l'invention, une fonction de support direct et de guidage en rotation des tourillons. En effet, du fait que les tourillons sont directement liés en rotation sur l'arbre de sortie du réducteur, le guidage en rotation et le support des tourillons peut être assuré par l'arbre de sortie du réducteur lui-même, arbre de sortie qui est donc guidé dans un carter du réducteur, lequel carter est fixé sur une extrémité externe desdits paliers. Dans ce cas, un jeu radial est préférentiellement ménagés entre les tourillons et les paliers, et un joint est disposé entre le tourillon et le palier, axialement situé entre l'extrémité du palier débouchant à l'intérieur de la virole et les lumières où passent les raccords des conduits flexibles. It will be understood that the bearings mentioned above, coaxially traversed by the trunnions, do not necessarily have, in the spirit of the invention, a direct support function and guide rotation of the trunnions. Indeed, because the pins are directly connected in rotation on the shaft of output of the gearbox, 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. In this case, 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 bearing opening inside the shell and the lights where it passes. the connections of the flexible ducts.
[0013] Les réducteurs servant également de support des tourillons pourraient aussi être montés fixement par rapport à la virole par tout moyen adéquat, sans nécessiter des paliers tels que mentionnés ci-dessus, moyennant seulement des moyens d'étanchéité entre les tourillons et la virole au passage des tourillons à travers la paroi de ladite virole. The reducers also serving as trunnion support 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. passing the pins through the wall of said ferrule.
[0014] Préférentiellement encore, les conduits flexibles sont raccordés sur les tourillons en des points sensiblement diamétralement opposés. Preferably again, the flexible ducts are connected to the journals at substantially diametrically opposite points.
[0015] Selon une autre disposition complémentaire, l'arbre de sortie du réducteur pénètre dans un alésage du tourillon, où il y est lié en rotation, et les canaux internes de refroidissement s'étendent dans le tourillon, entre les raccords des conduits d'alimentation et de retour, entre l'alésage et la surface externe du tourillon. Préférentiellement, les canaux internes de refroidissement s'étendent également entre le fond de l'alésage et l'extrémité du tourillon portant la gou lotte. Ces dispositions permettent notamment d'assurer un refroidissement efficace du tourillon et empêchent une transmission excessive de chaleur de la goulotte vers le réducteur d'entraînement par l'intermédiaire des tourillons. According to another complementary arrangement, the output shaft of the gearbox enters a bore of the trunnion, where it is connected in rotation, and the internal cooling channels extend into the trunnion, between the couplings of the ducts. supply and return, between the bore and the outer surface of the trunnion. Preferably, the internal cooling channels also extend between the bottom of the bore and the end of the trunnion carrying the gou burbot. These arrangements make it possible in particular to ensure efficient cooling of the trunnion and prevent excessive heat transmission from the chute to the drive reducer via the trunnions.
Brève description des dessins Brief description of the drawings
[0016] D'autres particularités et caractéristiques de l'invention ressortiront de la description détaillée d'un mode de réalisation présenté ci-dessous, à titre d'illustration, en se référant aux dessins annexés. Ceux-ci montrent: Other features and features of the invention will become apparent from the detailed description of an embodiment shown below, by way of illustration, with reference to the accompanying drawings. These show:
Fig. 1 : est une vue en perspective d'un des deux dispositifs de support et d'entraînement en pivotement de la goulotte de distribution d'un haut fourneau; Fig. 1 is a perspective view of one of the two devices for supporting and driving in pivoting of the delivery channel of a blast furnace;
Fig. 2: est une vue en perspective du seul tourillon montrant ses moyens de liaison avec un arbre de sortie d'un réducteur d'entraînement en rotation ainsi que ses circuits de refroidissement interne et les flexibles d'alimentation en eau. Description d'une exécution préférée Fig. 2: is a perspective view of the single spigot showing its means of connection with an output shaft of a rotating drive reducer and its internal cooling circuits and water supply hoses. Description of a preferred execution
[0017] Sur le dessin de la figure 1 on voit la virole 1 du dispositif de chargement du haut fourneau, rotative selon un axe vertical A1 du haut fourneau, et sur laquelle est solidarisé un palier 2, portant à son extrémité un réducteur 3 pour l'entraînement en pivotement de la goulotte, non représentée, selon un axe horizontal A2. Le réducteur 3 comporte un carter 31 fixé sur l'extrémité externe 21 du palier 2 par une bride 32. In the drawing of Figure 1 we see the shell 1 of the blast furnace loading device, rotatable along a vertical axis A1 of the blast furnace, and on which is secured a bearing 2, carrying at its end a gearbox 3 for the pivoting drive of the chute, not shown, along a horizontal axis A2. The gearbox 3 comprises a housing 31 fixed on the outer end 21 of the bearing 2 by a flange 32.
[0018] Le tourillon 4 de support de la goulotte, représenté figure 2, comporte vers son extrémité interne 40, orientée vers l'axe A1 , un logement 41 aménagé pour recevoir des pattes de support de la goulotte, qui y sont maintenues rigidement, de manière connue en soi. L'autre extrémité du tourillon 42 est reliée rigidement sur un arbre de sortie du réducteur 3, lequel arbre de sortie est supporté et guidé en rotation dans le carter 31 . A cette fin, le tourillon comporte un alésage borgne 45 de diamètre adapté pour recevoir sans jeu radial l'extrémité de l'arbre de sortie du réducteur, la liaison en rotation dudit arbre et du tourillon étant assurée par exemple par une clavette dont on voit la rainure 48 ménagée dans l'alésage 45. The support trunnion 4 of the chute, shown in FIG. 2, has towards its inner end 40, oriented towards the axis A1, a housing 41 arranged to receive support tabs of the trough, which are rigidly held therein, 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. To this end, the trunnion comprises a blind bore 45 of diameter adapted to receive without radial play the end of the output shaft of the reducer, the rotational connection of said shaft and the trunnion being ensured for example by a key which can be seen the groove 48 formed in the bore 45.
[0019] Le tourillon 4 est situé dans le palier 2 mais, comme déjà évoqué, c'est le guidage en rotation de l'arbre de sortie du réducteur dans le carter 31 qui assure le supportage et le guidage en rotation du tourillon. De ce fait, le tourillon n'a pas besoin d'être supporté et guidé dans le palier 2, et un jeu radial, par exemple de l'ordre de 1 mm, est ménagé entre le tourillon 4 set l'alésage du palier 2 traversé par ledit tourillon. The pin 4 is located in the bearing 2 but, as already mentioned, it is the rotational guide of the output shaft of the gearbox 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.
[0020] Des lumières oblongues 22 sont formées, en des positions sensiblement diamétralement opposées, dans la paroi du palier 2 entre la virole 1 et l'extrémité externe 21 du palier 2. Des flexibles 5 d'alimentation en eau de refroidissement sont raccordés, en des positions sensiblement diamétralement opposées, sur le tourillon, par des raccords 51 vissés sur le tourillon, assurant le raccordement étanche entre les flexibles 5 et les canaux de refroidissement internes 43, 47 du tourillon, représentés par les lignes pointillées 43. Les canaux internes de refroidissement s'étendent dans le tourillon, entre les raccords 51 , par des portions de canaux 43 s'étendant longitudinalement et/ou en arc de cercle entre l'alésage 45 et la surface externe du tourillon. De plus, une partie 47 de ces canaux s'étend, par exemple radialement, entre le fond 46 de l'alésage 45 et l'extrémité interne 40 du tourillon. Ainsi, la circulation de liquide de refroidissement dans le tourillon assure un refroidissement efficace empêchant la transmission de chaleur de la goulotte vers le réducteur 3. Oblong slots 22 are formed, in substantially diametrically opposite positions, in the wall of the bearing 2 between the shell 1 and the outer end 21 of the bearing 2. Cooling water supply hoses 5 are connected, in substantially diametrically opposite positions, on the trunnion, by connectors 51 screwed on the trunnion, ensuring the sealed connection between the flexible pipes 5 and the inner cooling channels 43, 47 of the trunnion, represented by the dotted lines 43. Internal channels in the spigot, between the connectors 51, the channel portions 43 extend longitudinally and / or in an arc between the bore 45 and the external surface of the trunnion. In addition, 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. Thus, the circulation of coolant in the trunnion provides efficient cooling preventing heat transfer from the trough to the reducer 3.
[0021 ] Les extrémités opposées 52 des flexibles sont raccordées sur le circuit de refroidissement fixe, non représenté, logé dans la chambre entourant la virole 1 et tournant avec ladite virole. Les raccords 51 passent dans les lumières 22, qui s'étendent sur une longueur d'arc suffisante pour permettre le déplacement libre des raccords 51 lors des pivotement du tourillon et donc de la goulotte. Cette longueur d'arc sera donc au moins égale à la valeur de l'angle de pivotement maximal en service de la goulotte, augmentée de la longueur nécessaire pour tenir compte de l'encombrement des raccords 51 . La plage de rotation correspondante est typiquement de 30 à 50 degrés, préférentiellement 45 degrés. 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 pivot angle in use of the chute, plus the length necessary to take account of the bulk of the connectors 51. The corresponding rotation range is typically 30 to 50 degrees, preferably 45 degrees.
[0022] Du fait du jeu ménagé entre le tourillon 4 et le palier 2, il pourrait survenir des fuites du gaz contenu dans la cuve du haut fourneau par cet espace et par les lumières 22. Pour assurer l'étanchéité, un joint, par exemple une tresse d'étanchéité, est placé entre le tourillon et le palier, par exemple dans une rainure 44 prévue à cet effet dans le tourillon, ce joint étant axialement situé entre l'extrémité interne du palier 2 et les lumières 22 percées dans la paroi du palier. Because of the clearance between the pin 4 and the bearing 2, it could occur leakage of the gas contained in the blast furnace tank by this space and the lights 22. To seal, a seal, by a sealing strip, is placed between the journal and the bearing, for example in a groove 44 provided for this purpose in the journal, this seal being axially located between the inner end of the bearing 2 and the slots 22 pierced in the bearing wall.

Claims

Revendications claims
1 . Dispositif de refroidissement des tourillons (4) de support d'une goulotte de distribution d'une installation de chargement d'un four à cuve, tel qu'un haut fourneau, la goulotte étant montée pivotante selon un axe horizontal (A2) sur une virole (1 ) coaxiale au four, la goulotte étant liée en rotation sur les tourillons entraînés en rotation par des moyens d'entraînement, les tourillons comportant des canaux internes (43) de refroidissement, caractérisé en ce que le dispositif de refroidissement comporte des conduits (5) d'alimentation et de retour pour l'eau de refroidissement circulant dans les canaux interne, les conduits (5) d'alimentation et de retour étant connectés sur les tourillons (4) par des raccords (51 ) fixés sur la surface cylindrique des tourillons, et les conduits (5) d'alimentation et de retour sont agencés pour permettre le déplacement rotatif des raccords (51 ) autour de l'axe de pivotement de la goulotte, lors des pivotements de la goulotte. 1. Device for cooling the trunnions (4) for supporting a distribution trough of a charging installation of a shaft furnace, such as a blast furnace, the trough being pivotally mounted along a horizontal axis (A2) on a ferrule (1) coaxial with the furnace, the trough being connected in rotation to the journals driven in rotation by drive means, the journals comprising internal cooling channels (43), characterized in that the cooling device comprises ducts; (5) supply and return for the cooling water circulating in the inner channels, the conduits (5) supply and return being connected to the pins (4) by connectors (51) fixed on the surface cylindrical trunnions, and the conduits (5) supply and return are arranged to allow the rotary movement of the connectors (51) around the pivot axis of the chute during the pivoting of the chute.
2. Dispositif selon la revendication 1 , dans lequel les tourillons sont montés tournant à l'intérieur de paliers (2) solidaires de la virole et les conduits (5) d'alimentation et de retour passent à travers des lumières oblongues (22) ménagées dans les paliers (2), les lumières oblongues s'étendant circonférentiellement sur une longueur d'arc prédéterminée de manière à autoriser le déplacement rotatif des raccords (51 ) des conduits (5) d'alimentation et de retour dans les dites lumières (22) lors des pivotements de la goulotte. 2. Device according to claim 1, wherein the journals are rotatably mounted within bearings (2) integral with the ferrule and the conduits (5) supply and return through oblong slots (22) arranged in the bearings (2), the oblong slots extending circumferentially over a predetermined arc length so as to allow the rotational movement of the connections (51) of the supply and return ducts (5) in said ports (22). ) during pivoting of the chute.
3. Dispositif selon la revendication 1 ou 2, dans lequel chaque tourillon (4) est lié directement en rotation par son extrémité (42) sur l'arbre de sortie d'un réducteur à engrenage (3) situé sur l'axe de pivotement horizontal (A2) des tourillons. 3. Device according to claim 1 or 2, wherein each pin (4) is directly connected in rotation by its end (42) on the output shaft of a gear reducer (3) located on the pivot axis horizontal (A2) trunnions.
4. Dispositif selon la revendication 3, dans lequel le guidage en rotation et le support des tourillons (4) est assuré par l'arbre de sortie du réducteur (3) qui est guidé dans un carter (31 ) du réducteur. 4. Device according to claim 3, wherein the guide in rotation and the support of the pins (4) is provided by the output shaft of the reducer (3) which is guided in a housing (31) of the gearbox.
5. Dispositif selon la revendication 4, dans lequel le carter (31 ) du réducteur (3) est fixé sur une extrémité externe (21 ) des paliers (2). 5. Device according to claim 4, wherein the housing (31) of the gear (3) is fixed on an outer end (21) of the bearings (2).
6. Dispositif selon la revendication 4, dans lequel un jeu radial est ménagé entre les tourillons (4) et les paliers (2). 6. Device according to claim 4, wherein a radial clearance is provided between the trunnions (4) and the bearings (2).
7. Dispositif selon la revendication 6, dans lequel un joint est disposé entre le tourillon (4) et le palier (2), axialement situé entre l'extrémité du palier débouchant à l'intérieur de la virole et les lumières (22). 7. Device according to claim 6, wherein a seal is disposed between the trunnion (4) and the bearing (2), axially located between the end of the bearing opening inside the shell and the slots (22).
8. Dispositif selon la revendication 1 , dans lequel les conduits d'alimentation et de retour sont des conduits flexibles (5) raccordés directement sur les tourillons (4) par des raccords vissés (51 ). 8. Device according to claim 1, wherein the supply and return ducts are flexible ducts (5) connected directly to the pins (4) by screwed connections (51).
9. Dispositif selon la revendication 1 , dans lequel les conduits (5) d'alimentation et de retour sont raccordés sur les tourillons (4) en des points sensiblement diamétralement opposés. 9. Device according to claim 1, wherein the conduits (5) supply and return are connected to the trunnions (4) at substantially diametrically opposite points.
10. Dispositif selon la revendication 1 , dans lequel la virole (1 ) est rotative selon l'axe vertical (A1 ) du four et les conduits d'alimentation et de retour (5) sont raccordées sur un circuit de refroidissement fixe par rapport à la virole, logé dans la chambre entourant la virole et tournant avec ladite virole. 10. Device according to claim 1, wherein the ferrule (1) is rotatable along the vertical axis (A1) of the furnace and the supply and return ducts (5) are connected to a fixed cooling circuit relative to the ferrule, housed in the chamber surrounding the ferrule and rotating with said ferrule.
1 1 . Dispositif selon la revendication 3, dans lequel l'arbre de sortie du réducteur pénètre dans un alésage du tourillon, où il y est lié en rotation, et les canaux internes (43) de refroidissement s'étendent dans le tourillon, entre les raccords (51 ) des conduits d'alimentation et de retour, entre l'alésage (45) et la surface externe du tourillon. 1 1. Device according to claim 3, wherein the output shaft of the gearbox enters a bore of the journal, where it is rotatably connected thereto, and the internal cooling channels (43) extend in the journal between the connections ( 51) supply and return ducts, between the bore (45) and the outer surface of the trunnion.
12. Dispositif selon la revendication 1 1 , dans lequel les canaux internes (47) de refroidissement s'étendent également entre le fond (46) de l'alésage (45) et l'extrémité (40) du tourillon portant la goulotte. 12. Device according to claim 1 1, wherein the internal channels (47) for cooling also extend between the bottom (46) of the bore (45) and the end (40) of the trunnion carrying the chute.
EP15790049.9A 2014-10-22 2015-10-21 Device for cooling a shaft furnace distribution chute support trunnions Active EP3209962B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU92581A LU92581B1 (en) 2014-10-22 2014-10-22 COOLING DEVICE FOR THE SUPPORT TRUNKS OF A DISTRIBUTION CHUTE OF A TANK OVEN
PCT/EP2015/074302 WO2016062740A1 (en) 2014-10-22 2015-10-21 Device for cooling a shaft furnace distribution chute support journals

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EP3209962A1 true EP3209962A1 (en) 2017-08-30
EP3209962B1 EP3209962B1 (en) 2018-04-04

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EP (1) EP3209962B1 (en)
JP (1) JP6634079B2 (en)
KR (1) KR101760660B1 (en)
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LU (1) LU92581B1 (en)
TW (1) TWI656315B (en)
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BE788477Q (en) * 1964-08-20 1973-01-02 Union Carbide Corp IMPROVEMENTS TO OVEN LOADING DEVICES
US3975578A (en) * 1974-06-13 1976-08-17 Greenewald Jr Herbert Indirect arc metal melting furnace method
LU84520A1 (en) * 1982-12-10 1984-10-22 Wurth Paul Sa COOLING DEVICE FOR A LOADING INSTALLATION OF A TANK OVEN
JPH0613241Y2 (en) * 1988-09-21 1994-04-06 石川島播磨重工業株式会社 Connection structure of cooling water pipe in bell-less top charging device
LU87948A1 (en) * 1991-06-12 1993-01-15 Wurth Paul Sa DEVICE FOR COOLING A DISTRIBUTION CHUTE OF A LOADING INSTALLATION OF A TANK OVEN
LU90294B1 (en) * 1998-10-06 2000-04-07 Wurth Paul Sa Bulk material distribution device
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EP1801241A1 (en) 2005-12-23 2007-06-27 Paul Wurth S.A. A rotary charging device for a shaft furnace equipped with a cooling system
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CN103215395B (en) * 2012-01-19 2015-04-29 秦皇岛秦冶重工有限公司 Blast furnace top chute distributing device

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CN107076516B (en) 2018-08-24
KR20170057442A (en) 2017-05-24
TW201629417A (en) 2016-08-16
JP6634079B2 (en) 2020-01-22
JP2017538088A (en) 2017-12-21
TWI656315B (en) 2019-04-11
WO2016062740A1 (en) 2016-04-28
CN107076516A (en) 2017-08-18
KR101760660B1 (en) 2017-07-24
US20170307293A1 (en) 2017-10-26
EP3209962B1 (en) 2018-04-04
US10670339B2 (en) 2020-06-02

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