EP2542848B1 - Porte-tuyère à vent chaud pour four à cuve, en particulier pour haut-fourneau - Google Patents

Porte-tuyère à vent chaud pour four à cuve, en particulier pour haut-fourneau Download PDF

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Publication number
EP2542848B1
EP2542848B1 EP11707628.1A EP11707628A EP2542848B1 EP 2542848 B1 EP2542848 B1 EP 2542848B1 EP 11707628 A EP11707628 A EP 11707628A EP 2542848 B1 EP2542848 B1 EP 2542848B1
Authority
EP
European Patent Office
Prior art keywords
ball
pipe sections
locking
bayonet lock
hot blast
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.)
Not-in-force
Application number
EP11707628.1A
Other languages
German (de)
English (en)
Other versions
EP2542848A1 (fr
Inventor
Franz-Josef Irnich
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.)
Z&J Technologies GmbH
Original Assignee
Z&J Technologies GmbH
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 Z&J Technologies GmbH filed Critical Z&J Technologies GmbH
Publication of EP2542848A1 publication Critical patent/EP2542848A1/fr
Application granted granted Critical
Publication of EP2542848B1 publication Critical patent/EP2542848B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/16—Tuyéres
    • 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
    • F27B1/16—Arrangements of tuyeres
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/16—Tuyéres
    • C21B7/163—Blowpipe assembly
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B9/00—Stoves for heating the blast in blast furnaces
    • C21B9/10—Other details, e.g. blast mains

Definitions

  • the present invention relates to a hot blast nozzle stick for a shaft, in particular blast furnace, consisting of at least, in particular three refractory lined tubular pieces with a movable connection, wherein the movable connection is each formed ball-joint-like and comprises a corrugated tube-like compensator.
  • US-A 4,987,838 also discloses a ball joint type connection between the pipe sections of a nozzle block
  • the most stressed and sensitive parts of the nozzle block are in the area of the joints.
  • the relative pivotal or rotational movements between two adjacent pipe sections often lead to irreversible deformation of the seals in the region of the Kugefabitess vom and to friction of refractory material on refractory material.
  • the individual pipe sections each consist of an outer steel armor and an inner, refractory lining.
  • the corresponding universal joints expand by up to about 1.0 mm in the operation of pressurization and thus also increase a gap between the spherical section surfaces defining the corresponding ball joint by about 1.0 mm.
  • the arranged between the aforementioned spherical section surfaces seal usually ceramic sealing felt, is accordingly at each pressure change by up to 10% apart and pressed together again. As a result, the seal will eventually crumble and consequently lose the required sealing effect.
  • the well-known ball joint-like compound is thus designed relatively soft with the aforementioned disadvantages.
  • the gimbal connection or corresponding universal joints is usually mounted outside of said compensator or are. The effort is relatively large.
  • An essential aspect of the present invention is thus that the ball joint-like connection between adjacent pipe sections a bayonet locking, specifically "double ball bayonet locking" comprises.
  • the idea is that the back pieces are connected via an articulated bayonet, which can transmit tensile and compressive loads and allows a relative pivoting of the pipe sections of up to +/- 4.5 °, in particular about 3.5 °. This can be omitted usually mounted outside the compensator universal joint (gimbal connection).
  • the articulated connection is formed such that the sealing gap between mutually corresponding spherical section surfaces at the front ends of the refractory lining of adjacent pipe sections, which is usually od by a ceramic sealing felt. Like. Filled, is substantially constant.
  • the construction according to the invention is characterized by a higher compactness.
  • double ball-bayonet lock tuned to the spherical section surfaces on the facing end faces of the refractory lining of the ball joint interconnected pipe sections in the region of their compound, in such a way that also the center of the fulcrum of the ball joint-like compound is as well Center of the complementary locking surfaces of the bayonet lock.
  • the hinge connection is formed so that the sealing ring is not excessively loaded even with a larger pressure change, as is the case in the prior art.
  • the reason for this is, in particular, that the bayonet locking despite its flexibility maintains the predetermined axial distance between two adjacent pipe sections.
  • the corresponding articulation is maintained unchanged under pressure as well as under tension in the axial direction. She lets essentially only a relative pivoting between two adjacent pipe sections.
  • the complementary plug-in rotary parts of the bayonet lock are preferably flanged or welded to the mutually facing end portions of two adjacent pipe sections, specifically on the steel armor.
  • a nozzle is shown in longitudinal section, which has a main ring line, which is arranged around a blast furnace, with the wall of this blast furnace combines.
  • a nozzle has a rectilinear, usually oblique portion of a central tubular connecting member 11 which at one, for example, the lower end of a connected via a connecting piece with the ring pipe socket and at its other, here upper end to a a manifold flanged pipe socket, is articulated.
  • the manifold is usually extended by a nozzle tube or mouthpiece, the end of which can be mounted ball-jointed on a tuyere, which is fixed in the wall of the blast furnace.
  • the upper and lower joints 15 between the central pipe section 11 and the other two pipe sections 10 and 12 are universal joint, the relative movements between the ring line on the one hand and the wall of the furnace on the other hand allow.
  • the tightness in the region of the articulated joints 15 is ensured by bellows compensators or corrugated pipe-like compensators 16. These are known construction elements.
  • Fig. 1 Regarding the installation site of the construction according to Fig. 1 becomes an example Fig. 1 of the DE 41 36 649 C2 and the corresponding description of this figure.
  • each ball-joint-like compound 15 comprises a bayonet lock 17, the complementary locking surfaces 18, 19 and 20, 21 (see Fig. 2b, 3b ) are each spherical section surfaces whose center is the pivot point "D" of the ball joint-like connection 15.
  • the locking portions of the bayonet lock 17 are in the Figures 2a to 3b each with the reference numerals 22 (negative or groove-like ring sections) and 23 (positive or web-like ring sections).
  • the one part of the bayonet lock comprises two diametrically arranged to the longitudinal center axis web-like ring locking portions 23 according to the Fig.
  • the complementary part of the bayonet lock has two groove-like ring locking sections 22 also arranged diametrically to the longitudinal center axis.
  • the web-like ring locking portions 23 can be inserted.
  • the mentioned locking portions 22, 23 or associated pipe sections are rotated relative to each other about the longitudinal center axis by 90 °.
  • the two pieces of pipe are locked together like a bayonet.
  • the connection takes place in usually via a plug-in rotary movement.
  • the interlocked pipe sections are held in the axial direction, both under tensile and compressive load.
  • the respective mutually corresponding locking surfaces of the aforementioned ring-locking portions 22, 23 each define ball portion surfaces and thus allow a small pivoting of the interconnected pipe sections relative to each other.
  • the corresponding ball section surfaces of the bayonet lock are in the FIGS. 1 and 2b, 3b each identified by the reference numerals 18, 19 and 20, 21.
  • the center of all the spherical section surfaces is the pivot point "D" of the ball joint-like connection 15 in total.
  • the gap 26 remains substantially constant, regardless of changing pressure loads with the result that the seal 27 is not affected by alternating pressure loads.
  • the mutually facing locking surfaces 18, 19 and 20, 21 of the bayonet lock 17 are thus designed so that relatively free of play both pressure and tensile loads are transferable. Furthermore, they are designed so that they have a relative pivoting of adjacent pipe sections 10, 11 and 11, 12 of up to about +/- 2.5 ° to +/- 4.5 °, in particular about +/- 3.5 ° allow.
  • FIGS. 4a to 4d referred where different relative positions between the individual pieces of pipe are shown in the drawing, in each case specifying the pivoting angle.
  • the bayonet lock 17 allows the required pivoting, the game between the mutually corresponding locking portions, ie positive and negative locking portions 22, 23 of the bayonet lock 17 is a maximum of about 0.1 mm to 0.4 mm.
  • the complementary plug-in rotary parts 28, 29 (see FIGS. 2b, 3b ) of the bayonet lock 17 are respectively flanged or welded to the mutually facing end portions of two adjacent pipe sections 10, 11 and 11, 12.
  • the latter is the case in the illustrated embodiment, in particular Fig. 1 can be seen with the welds 30, 31.
  • the welded connection thus takes place concretely with the outer steel armor 14 of the individual pipe sections.
  • the compensator 16 is flanged over the articulated joint extending outside the same on the steel armor 14 of adjacent pipe sections (flange 32, 33 in Fig. 1 ).
  • the bayonet lock instead of two diametrically arranged to the longitudinal center axis groove-like ring locking portions 22 and complementary web-like ring locking portions 23 may also have four such complementary locking portions with the result that for locking or unlocking the mutually associated pipe sections these need only be rotated by 45 ° about the longitudinal center axis around. In the case of five or six mutually corresponding locking sections, an even smaller relative rotation of the pipe sections is required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Joints Allowing Movement (AREA)
  • Blast Furnaces (AREA)

Claims (6)

  1. Etage de tuyère chauffante pour un four à cuve, plus particulièrement un haut-fourneau, constitué au moins de deux, de préférence trois éléments tubulaires à revêtement réfractaire (10, 11, 12) avec une liaison mobile (15), la liaison mobile étant conçue avec une articulation à rotule, et comprenant un compensateur (16) sous la forme d'un tube ondulé,
    caractérisé en ce que
    la liaison articulée à rotule (15) comprend un verrouillage à baïonnette (17) dont les surfaces de verrouillage complémentaires sont des surfaces partiellement sphériques (18, 19 ou 20, 21) dont le centre est le centre de rotation (D) de la liaison articulée à rotule (15).
  2. Etage de tuyère chauffante selon la revendication 1,
    caractérisé en ce que
    les faces frontales orientées les unes vers les autres du revêtement réfractaire (13) des éléments tubulaires (10, 11, 12) reliés entre eux avec une articulation à rotule définissent également, au niveau de leur liaison (15), des surfaces partielles sphériques (24, 25) dont le centre est également le centre de rotation (D) de la liaison articulée à rotule (15).
  3. Etage de tuyère chauffante selon la revendication 1 ou 2,
    caractérisé en ce que
    entre les deux surfaces partiellement sphériques (24, 25) du revêtement réfractaire (13), se trouve une bague d'étanchéité ou une plaque annulaire d'étanchéité (27) constituée d'un matériau résistant à la chaleur, plus particulièrement des fibres céramiques.
  4. Etage de tuyère chauffante selon l'une des revendications 1 à 3, caractérisé en ce que
    les surfaces de verrouillage (18, 19 ou 20, 21), orientées l'une vers l'autre, du verrouillage à baïonnette (17) ou de ses portions de verrouillage (22, 23) sont conçues de façon à ce que des charges de pression ainsi que des charges de traction peuvent être transmises relativement sans jeu et à ce qu'elles permettent un pivotement relatif d'éléments tubulaires (10, 11 ou 11, 12) adjacents autour du centre de rotation (D) correspondant de jusqu'à environ +/- 2,5° à +/- 4,5°, plus particulièrement environ +/- 3,5°.
  5. Etage de tuyère chauffante selon la revendication 4,
    caractérisé en ce que
    le jeu entre les portions de verrouillage (22, 23) correspondantes entre elles du verrouillage à baïonnette (17) est au maximum d'environ 0,1 mm à 0,4 mm.
  6. Etage de tuyère chauffante selon l'une des revendications 1 à 5, caractérisé en ce que
    les parties d'insertion-rotation (28, 29) du verrouillage à baïonnette (17) sont bridées ou soudées chacune sur les sections d'extrémité orientées les unes vers les autres de deux éléments tubulaires (10, 11 ou 11, 12) adjacents, plus particulièrement sur leur blindage en acier (14).
EP11707628.1A 2010-03-05 2011-02-28 Porte-tuyère à vent chaud pour four à cuve, en particulier pour haut-fourneau Not-in-force EP2542848B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010015842A DE102010015842A1 (de) 2010-03-05 2010-03-05 Heißwinddüsenstock für einen Schachtofen, insbesondere Hochofen
PCT/EP2011/052920 WO2011107428A1 (fr) 2010-03-05 2011-02-28 Porte-tuyère à vent chaud pour four à cuve, en particulier pour haut-fourneau

Publications (2)

Publication Number Publication Date
EP2542848A1 EP2542848A1 (fr) 2013-01-09
EP2542848B1 true EP2542848B1 (fr) 2015-01-07

Family

ID=43937576

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11707628.1A Not-in-force EP2542848B1 (fr) 2010-03-05 2011-02-28 Porte-tuyère à vent chaud pour four à cuve, en particulier pour haut-fourneau

Country Status (5)

Country Link
EP (1) EP2542848B1 (fr)
KR (1) KR20130009979A (fr)
DE (1) DE102010015842A1 (fr)
UA (1) UA106903C2 (fr)
WO (1) WO2011107428A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU91921B1 (en) 2011-12-19 2013-06-20 Wurth Paul Sa Compensation joint for a fluid conduit

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU63079A1 (fr) 1971-04-29 1971-08-27
DE2459180C3 (de) * 1974-12-14 1978-05-03 Hawiko Kompensatoren- U. Apparatebau Gmbh & Co Kg, 5830 Schwelm Kompensatorverbindung für heiße Medien, insbesondere für Heinwinddüsenstöcke eines Hochofens
AT346875B (de) * 1974-09-06 1978-09-15 Wurth Anciens Ets Paul Kompensatorverbindung zwischen zwei mit feuerfestfutter versehenen rohrstuecken und gelenkduesenstoecke mit diesen verbindungen
AU608987B2 (en) * 1988-07-19 1991-04-18 Paul Wurth S.A. Device for injecting preheated air in a shaft furnace
LU87504A1 (fr) * 1989-04-21 1990-12-11 Wurth Paul Sa Dispositif d'injection d'air prechauffe dans un four a cuve
US5209657A (en) * 1990-11-09 1993-05-11 Paul Wurth S.A. Device for injecting preheated air into a shaft furnace and process of manufacturing ball-and-socket joints
LU87838A1 (fr) 1990-11-09 1992-08-25 Wurth Paul Sa Dispositif d'injection d'air prechauffe dans un four a cuve et procede de fabrication de rotules convexes d'articulations spheriques
LU88241A1 (fr) 1993-03-31 1994-10-03 Wurth Paul Sa Dispositif d'injection d'air préchauffé dans un four à cuve

Also Published As

Publication number Publication date
WO2011107428A1 (fr) 2011-09-09
UA106903C2 (uk) 2014-10-27
KR20130009979A (ko) 2013-01-24
DE102010015842A1 (de) 2011-09-08
EP2542848A1 (fr) 2013-01-09

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