EP0363576B1 - Dispositif d'injection d'air préchauffé dans un four à cuve - Google Patents
Dispositif d'injection d'air préchauffé dans un four à cuve Download PDFInfo
- Publication number
- EP0363576B1 EP0363576B1 EP89112514A EP89112514A EP0363576B1 EP 0363576 B1 EP0363576 B1 EP 0363576B1 EP 89112514 A EP89112514 A EP 89112514A EP 89112514 A EP89112514 A EP 89112514A EP 0363576 B1 EP0363576 B1 EP 0363576B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- articulation
- connection piece
- ties
- curvature
- ball
- 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
Links
- 238000007664 blowing Methods 0.000 title claims 2
- 238000006073 displacement reaction Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/16—Tuyéres
- C21B7/163—Blowpipe assembly
Definitions
- the present invention relates to a device for injecting preheated air into a shaft furnace, consisting of several separate elements consisting of an outer shield and an inner refractory lining and comprising at least one central tubular element connected, on one side, by a first ball joint and a first compensator to a first tube integral with a circular duct for supplying preheated air surrounding the oven and, on the opposite side, by a second ball joint and a second compensator to a second tube which is extended by an elbow and a nozzle, the latter being articulated by a third articulation with a spherical joint with respect to the wall of the furnace and further comprising at least one pair of tie rods connecting, by articulated means, the first tubing to the second tube and in which said first articulation is oriented so that its center of co urbure is located on the axis of said first pipe inside thereof.
- wind carrier is exposed to mobility and leakage problems. Indeed, due to the high temperature of the preheated air (temperature of 1,200 ° C or more) and the high temperature inside the oven, the wall of the oven, as well as the circular duct and the blower are exposed to thermal expansions and deformations causing significant relative movements between the circular pipe and the oven wall. It is therefore necessary that the wind carrier is able to compensate for these relative displacements while avoiding leaks of gas or preheated air.
- US Patent No. 3,766,868 provides a wind carrier of the kind described in the preamble.
- This wind carrier was subsequently perfected by the design of universal joints with spherical joints of the kind described in document DE-C2-2218331.
- the three articulations of this wind carrier allow the compensation of all relative movements between the circular duct and the wall of the oven. Sealing at the joints is ensured by bellows compensators, while mechanical stability is ensured by cardanic links associated at the level of the first and second joints with spherical joints at the two opposite ends of the tubular element. central.
- the object of the present invention is to provide an injection device of the kind described in the preamble which allows a better compromise between these contrary requirements.
- the device proposed by the present invention in claim 1 is essentially characterized in that the second articulation is oriented in the opposite direction relative to the first articulation and in that its center of curvature is on the axis of the second tube, inside the latter or the elbow.
- the tie rods are connected to the two tubes by joints, the centers of which are respectively in two diametrical planes of the tubes, each containing the center of curvature of one of said first or second spherical articulation.
- each of the tie rods is connected to a flange of said said first or second tubing by a pair of washers with adjacent spherical sliding surfaces, the center of curvature of which is situated beyond the end of the tie rod in a diametral plane of the tubing containing the center of curvature of said first or second articulation spherical.
- the central tubular element is connected to the tie rods by a device for guiding and supporting the central element.
- the known wind carrier shown in Figure 1 by the reference 20 connects a main circular pipe 22, arranged around a blast furnace, to the wall 24 thereof.
- This blower 20 has a rectilinear oblique section consisting of a central tubular element 26 articulated by its upper end on a tube 28 secured to the circular pipe 22 and by its lower end on a tube 30 which is clamped on an elbow 32.
- This elbow 32 is extended by a nozzle 34 whose end is articulated on a nozzle 36 fixed in the wall 24 from the oven.
- the upper articulation 38 and the lower articulation 40 of the element 26 are spherical joint joints whose centers of curvature are identified by X and Y.
- the articulation between the nozzle 34 and the nozzle 36 is a joint 42 with a spherical joint whose center of curvature is represented by Z.
- the three points X, Y and Z therefore constitute a three-point articulation in space which allows sufficient angular displacements of the nozzle 34 and of the central element 26 to compensate for all the relative movements between the circular pipe 22 and the wall 24 of the oven.
- the distance between the centers of curvature X and Y of the joints 38 and 40 is represented by 1 in FIG. 1.
- the amplitudes of the angular displacements of the central element 26 and, consequently, the stresses of the compensators 44 and 46 will be as much smaller as this distance 1 is greater.
- lengthening the length 1 increases the dimensions of the wind carrier.
- the lower articulation of the central tubular element is turned over so that the two upper and lower ends of this central element become concave, while the corresponding adjacent ends of the pipes of the circular pipe and that of the elbow become convex.
- This windshield proposed by the present invention is shown in Figure 2 and the elements corresponding to those of Figure 1 bear the similar references of the 100 series.
- the centers of curvature X and Y of the ball joints 138 and 140 are separated by a distance l ′ which, in the example shown, is equal to the distance l in FIG. 1.
- the total length of the central element 126 has been considerably reduced, the difference in length being illustrated by the distance between the axis O ′ of the circular pipe of FIG.
- Figures 3 and 4 show in more detail the two joints 138 and 140 on either side of the central tubular element 126.
- the radii of curvature R1 and R2 of the two spherical joints 138 and 140 are preferably equal.
- the present invention also proposes the elimination of the cardan joints 48 and 50 of FIG. 1.
- a pair of tie rods has been provided diametrically opposite to each other and connecting the upper tube 128 to the lower tube 130.
- these tie rods 152, 154 are simply engaged on pivots 156 integral with the pipes 128 and 130.
- the tie rods 152, 154 must be engaged on the pivots 156 with sufficient clearance.
- the axis of the two pivots 156 of the tubing 128 passes through the center of curvature X of the upper articulation 138.
- the lower pivots 156 must be fixed on the tubing 130 so that their axes also pass through the center of curvature Y of the lower joint 140.
- FIG. 5 illustrates, for example, a relative lateral offset, of an amplitude s between the upper tube 128 and the lower tube 130.
- Such an offset can, for example, be caused by a horizontal displacement of the circular pipe 122 relative to in the oven or a rotation of this pipe with respect to the oven.
- the axes of the pipes 128 and 130 remain parallel to each other while the central element 126 compensates for this offset by positioning itself so that its axis passes through the centers of curvatures X and Y of the two joints 138 and 140. This movement causes, on one side, a compression of the corrugations of the compensators 144 and 146 and a relaxation of the undulations of these compensators on the opposite side.
- FIGS. 6 and 7 show flexions, respectively in one direction and in the opposite direction of the wind carrier at the level of the central element 126.
- the axis of the lower tube 130 is inclined at an angle by relative to the axis of the upper tube 128.
- This bending is compensated by the central element 126 which is automatically positioned so that its axis passes through the centers of curvature X and Y of the two joints, that is to say that its axis forms an angle ⁇ / 2 with the axis of the upper tube 128 and an angle ⁇ / 2 with the axis of the lower tube 130.
- the positions of FIGS. 6 and 7 result essentially from a relative vertical movement between the circular pipe 122 and the wall 124 of the oven.
- Figure 8 shows a lateral offset between the upper and lower pipes 128 and 130 similar to that of Figure 5, but in a direction perpendicular to the movements of Figure 5, that is to say the offset of Figure 8 is located in the plane of Figure 2.
- Figures 5 to 8 show, by way of illustration, elementary movements, but in practice, the movements of the blower are more complex, it is that is, the offsets and inclinations shown in Figures 5 to 8 can occur at the same time.
- Figure 9 shows an advantageous embodiment which allows a shortening of the tie rods of the embodiment of Figure 3.
- the two pipes 228 and 230 respectively have a circular flange 258 and 260 which are attached to the compensators 244, 246 and which are crossed by tie rods 252, 254.
- the connection between the ends of the tie rods 252, 254 and the flanges 258 and 260 is illustrated in detail in FIG. 9a and with reference to the connection between the tie rod 254 and the flange 258, the three other connections being identical to that of the figure. 9a.
- the flange 258 has a passage opening 262 of the tie rod 258 which is wide enough to allow a certain inclination of the tie rod 254 relative to the flange 258 as a result of the movements illustrated in FIGS. 5 to 8.
- the tie rods are maintained by nuts 264 screwed onto the ends of the tie rods, outside the flanges 258, 260.
- each nut 264 and the corresponding flange 258 or 260 are two washers 266, 268 whose adjacent surfaces slide one over the other by following the inclination of the tie rod relative to the flange.
- the adjacent sliding surfaces of the washers 266, 268 have spherical curvatures whose center of curvature is located beyond the flanges 258, 260 on the axis of the tie rods 252, 254 or on the extension of these axes.
- the center of curvature of the washers 266, 268 must also be located in a diametral plane of the tube 228 containing the center of curvature X of the spherical joint 238 between this tube 228 and the central element 226. note that the two washers 266 and 268 can be replaced respectively by a seat secured to the flange 258 and a curved surface of the nut 264.
- the advantage of the design according to FIGS. 9 and 9a is that one can either bring each of the flanges 258, 260 closer to the central element 226 by a distance R corresponding to the radius of curvature of the washers 266, 268 and reduce by 2R the length of each tie rod 252, 254, or increase the radii of curvature of the two spherical joints 238, 240 and thus lengthen the distance between their center of curvature X and Y.
- Figures 5 to 8 have shown that the compensation of the different relative movements between the upper and lower tubing is achieved by aligning the axis of the central element on the centers of curvature X and Y of the two spherical joints. It is proposed, in the embodiment of FIGS. 10 to 17, to assist the optimal positioning of the central element 226 to avoid any random movements and superfluous friction at the joints of the joints.
- Figures 10 and 11 show side views of the central tubular element 326 provided on either side with its compensators 344, 346 surrounding the spherical seals 338 and 340, not visible in these figures.
- a frame 352 eg square or, preferably, in the form of a ring, is arranged around the central element 326 to which it is articulated by two pivots 354 and 356, diametrically opposite, eg housed in openings passage of the ring 352 and the shielding of the central element 326.
- the ring 352 can therefore perform a pivoting movement relative to the common axis O of the two pivots 354, 356 and vice versa.
- the ring 352 further comprises, offset by 90 ° relative to the pivots 354, 356, two diametrically opposite articulations, connecting it to two tie rods 358, 360.
- articulations can be formed, in the simplest way, by two pairs of forks 362 and 364 welded externally to the ring 352 and in the rounded hollow of which is engaged a cross-piece 366, 368 with round section, integral with the tie rods 358, 360.
- the axes of the cross-pieces 366, 368 therefore form two pivot axes between the ring 352, on the one hand, and the tie rods 358, 360, on the other hand, and vice versa, these two axes being both parallel to the pivot axis O described above.
- Each of the two tie rods, 358, 360 is, moreover, articulated by its upper and lower ends respectively to the upper tubes 328 and lower 330.
- Each of these articulations can be constituted by a simple hinge 370 comprising a pivoting hub 372 engaged through a double eyelet secured to the tubing concerned and an opening at the end of the tie rod 358 or 360.
- the passage openings at the ends of the tie rods 358, 360 are made in oblong holes and preferably have rounded bearing surfaces in order to allow also pivoting of the tie rods 358, 360 in the plane of FIG. 11.
- the hinges 372 can also be replaced by more sophisticated articulations, eg ball joints to make an arrangement in accordance with FIG. 9.
- the tie rods 358 and 360 therefore maintain a constant and predetermined distance between the pipes 328 and 330, while they carry, by means of the ring 352, the central element 326 floating between the pipes 328 and 330.
- FIGS. 12 to 17 illustrate different possibilities of relative movements and pivotings between the pipes 328 and 330 and the manner in which these movements are compensated by a corresponding positioning of the central element 326.
- the transverse deformations relative to the plane of FIGS. 12 to 14 and illustrated by FIGS. 15 to 17 stress the articulations at the level of the ring 352.
- the displacements in this plane cause a parallel deformation between the tie rods 358, 360 and the ring 352 by pivoting of the latter around the axis O relative to the central element 326 and by relative pivoting between the ring 352 and the tie rods 358, 360.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Joints Allowing Movement (AREA)
- Blast Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Pipe Accessories (AREA)
- Duct Arrangements (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89112514T ATE93547T1 (de) | 1988-07-19 | 1989-07-08 | Vorrichtung zum einblasen vorgewaermter luft in einen schachtofen. |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU87283 | 1988-07-19 | ||
LU87283A LU87283A1 (fr) | 1988-07-19 | 1988-07-19 | Dispositif d'injection d'air prechauffe dans un four a cuve |
LU87505 | 1989-04-21 | ||
LU87505A LU87505A1 (fr) | 1989-04-21 | 1989-04-21 | Dispositif d'injection d'air prechauffe dans un four a cuve |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0363576A1 EP0363576A1 (fr) | 1990-04-18 |
EP0363576B1 true EP0363576B1 (fr) | 1993-08-25 |
Family
ID=26640330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89112514A Expired - Lifetime EP0363576B1 (fr) | 1988-07-19 | 1989-07-08 | Dispositif d'injection d'air préchauffé dans un four à cuve |
Country Status (16)
Country | Link |
---|---|
US (1) | US4987838A (sk) |
EP (1) | EP0363576B1 (sk) |
JP (1) | JP2840763B2 (sk) |
KR (1) | KR0133671B1 (sk) |
CN (1) | CN1019818B (sk) |
AU (1) | AU608987B2 (sk) |
BR (1) | BR8903613A (sk) |
CA (1) | CA1335328C (sk) |
CZ (1) | CZ279945B6 (sk) |
DE (1) | DE3920221C2 (sk) |
ES (1) | ES2043975T3 (sk) |
FR (1) | FR2634543B1 (sk) |
GB (1) | GB2221023B (sk) |
PL (1) | PL162875B1 (sk) |
SK (1) | SK278767B6 (sk) |
TR (1) | TR24989A (sk) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LU87730A1 (fr) * | 1990-04-27 | 1991-11-15 | Wurth Paul Sa | Dispositif d'injection d'air prechauffe dans un four a cuve |
ZA918261B (en) * | 1990-11-09 | 1992-09-30 | Wurth Paul Sa | Device for injecting preheated air into a shaft furnace and process for manufacturing ball-and-socket joints |
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 |
JPH065531A (ja) * | 1992-06-22 | 1994-01-14 | Tokyo Electron Tohoku Ltd | 熱処理装置の配管連結装置 |
NL9201838A (nl) * | 1992-10-23 | 1994-05-16 | Hoogovens Groep Bv | Hetewindleiding. |
US6176526B1 (en) | 1999-01-04 | 2001-01-23 | Lever Brother Company Division Of Conopco | Expansion joint |
KR100804813B1 (ko) * | 2003-08-11 | 2008-02-20 | (주) 대진스폐샬옵텍스 | 자외선 측정기 |
DE102010015842A1 (de) * | 2010-03-05 | 2011-09-08 | Z & J Technologies Gmbh | Heißwinddüsenstock für einen Schachtofen, insbesondere Hochofen |
CN102914144B (zh) * | 2011-08-01 | 2016-04-27 | Sab有限公司 | 鼓风口弯头 |
LU91921B1 (en) * | 2011-12-19 | 2013-06-20 | Wurth Paul Sa | Compensation joint for a fluid conduit |
LU102097B1 (en) | 2020-09-28 | 2022-03-29 | Wurth Paul Sa | Reducing gas injection System |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE35369C (de) * | BOCHUMER EISENHÜTTE, HEINTZMANN & DREYER in Bochum | Neuerung an Düsenstöcken | ||
US1866080A (en) * | 1931-06-30 | 1932-07-05 | Edgar E Brosius | Tuyere structure and method of changing the same |
DE584146C (de) * | 1931-07-30 | 1933-09-15 | Edgar E Brosius | Verfahren und Vorrichtung zum Auswechseln von Hochofenwindformen |
US3166621A (en) * | 1961-03-16 | 1965-01-19 | Colorado Fuel & Iron Corp | Burner tuyere arrangement for a blast furnace |
GB1308351A (en) * | 1969-04-21 | 1973-02-21 | Wurth Anciens Ets Paul | Tuyere feed lines in blast furnaces |
LU63079A1 (sk) * | 1971-04-29 | 1971-08-27 | ||
US3766868A (en) * | 1972-02-22 | 1973-10-23 | Anciens Etablissements P Warth | Tuyere stock for furnaces |
DE7325087U (de) * | 1973-07-07 | 1973-11-08 | Steinfurter Eisenwerk Gmbh | Düsenstock |
FR2404674A1 (fr) * | 1977-09-30 | 1979-04-27 | Usinor | Dispositif de support d'une descente de vent de haut-fourneau |
DE3221070C1 (de) * | 1982-06-04 | 1983-08-25 | Hawiko Kompensatoren- und Apparatebau GmbH & Co KG, 5830 Schwelm | Duesenstock fuer Schachtoefen,insbesondere Hochoefen |
-
1989
- 1989-06-20 AU AU36592/89A patent/AU608987B2/en not_active Ceased
- 1989-06-21 DE DE3920221A patent/DE3920221C2/de not_active Expired - Fee Related
- 1989-06-21 FR FR898908249A patent/FR2634543B1/fr not_active Expired - Lifetime
- 1989-06-29 GB GB8914973A patent/GB2221023B/en not_active Expired - Lifetime
- 1989-07-06 TR TR89/0633A patent/TR24989A/xx unknown
- 1989-07-08 EP EP89112514A patent/EP0363576B1/fr not_active Expired - Lifetime
- 1989-07-08 ES ES89112514T patent/ES2043975T3/es not_active Expired - Lifetime
- 1989-07-10 CA CA000605202A patent/CA1335328C/en not_active Expired - Fee Related
- 1989-07-14 KR KR1019890010066A patent/KR0133671B1/ko not_active IP Right Cessation
- 1989-07-14 JP JP1182345A patent/JP2840763B2/ja not_active Expired - Lifetime
- 1989-07-14 US US07/380,129 patent/US4987838A/en not_active Expired - Fee Related
- 1989-07-17 BR BR898903613A patent/BR8903613A/pt not_active IP Right Cessation
- 1989-07-18 CN CN89104884A patent/CN1019818B/zh not_active Expired
- 1989-07-19 PL PL28066089A patent/PL162875B1/pl unknown
- 1989-07-19 SK SK4411-89A patent/SK278767B6/sk unknown
- 1989-07-19 CZ CS894411A patent/CZ279945B6/cs not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ES2043975T3 (es) | 1994-01-01 |
KR900001864A (ko) | 1990-02-27 |
GB8914973D0 (en) | 1989-08-23 |
PL162875B1 (pl) | 1994-01-31 |
GB2221023A (en) | 1990-01-24 |
AU608987B2 (en) | 1991-04-18 |
JP2840763B2 (ja) | 1998-12-24 |
FR2634543B1 (fr) | 1992-02-07 |
DE3920221A1 (de) | 1990-01-25 |
SK441189A3 (en) | 1998-02-04 |
CA1335328C (en) | 1995-04-25 |
CZ441189A3 (en) | 1995-04-12 |
FR2634543A1 (fr) | 1990-01-26 |
US4987838A (en) | 1991-01-29 |
TR24989A (tr) | 1992-08-17 |
PL280660A1 (en) | 1990-02-05 |
GB2221023B (en) | 1991-12-04 |
CN1039445A (zh) | 1990-02-07 |
EP0363576A1 (fr) | 1990-04-18 |
JPH0273909A (ja) | 1990-03-13 |
BR8903613A (pt) | 1990-03-13 |
AU3659289A (en) | 1990-01-25 |
CZ279945B6 (cs) | 1995-09-13 |
DE3920221C2 (de) | 1998-05-14 |
KR0133671B1 (ko) | 1998-07-01 |
SK278767B6 (sk) | 1998-02-04 |
CN1019818B (zh) | 1992-12-30 |
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