EP0379683B1 - Feuerfestes Steinpaar für einen Drehschieberverschluss - Google Patents

Feuerfestes Steinpaar für einen Drehschieberverschluss Download PDF

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Publication number
EP0379683B1
EP0379683B1 EP89122433A EP89122433A EP0379683B1 EP 0379683 B1 EP0379683 B1 EP 0379683B1 EP 89122433 A EP89122433 A EP 89122433A EP 89122433 A EP89122433 A EP 89122433A EP 0379683 B1 EP0379683 B1 EP 0379683B1
Authority
EP
European Patent Office
Prior art keywords
flow channel
pair
discharge block
axis
central axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89122433A
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German (de)
English (en)
French (fr)
Other versions
EP0379683A1 (de
Inventor
Dieter Beckers
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.)
Martin and Pagenstecher AG
Original Assignee
Martin and Pagenstecher AG
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Filing date
Publication date
Application filed by Martin and Pagenstecher AG filed Critical Martin and Pagenstecher AG
Priority to AT89122433T priority Critical patent/ATE68384T1/de
Publication of EP0379683A1 publication Critical patent/EP0379683A1/de
Application granted granted Critical
Publication of EP0379683B1 publication Critical patent/EP0379683B1/de
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/14—Closures

Definitions

  • the invention relates to a pair of refractory bricks for a rotary slide valve closure with a pivotable and lockable slide valve housing on containers with a bottom pouring opening for molten metal, consisting of a stationary cobblestone with a sealing and sliding surface inclined to the horizontal and a flow channel with a vertical central axis and a rotatable, truncated cone shaped spout with flow channel with a vertical central axis, which sits in a drivable annular driver housing, which is rotatably arranged in the slide housing of the rotary slide valve closure, the axis of rotation of the pouring stone forming an acute angle with the vertical central axis of the flow channel and the intersection of the axis of rotation with the central axis of the flow channel in Cross-sectional plane of the outlet opening of the flow channel in the pouring stone falls.
  • a fireproof pair of stones of the type described at the outset is known from German publication 2043588, which relates to a rotary slide valve closure.
  • the head and pouring stone of the refractory stone pair which in DE-AS 2043588 bear the designation perforated and slide plate, are arranged in a slide housing, consisting of an upper and a lower housing part, both parts being connected to one another by a screw connection. Due to the rigid arrangement of the perforated and slide plate in the slide housing, it should be difficult to achieve uniform contact between the sealing and sliding surfaces of the perforated and slide plate, especially since refractory parts may have dimensional tolerances due to the manufacturing process.
  • the rotatable slide plate has an elongated frustoconical shape, the angle between the axis of rotation and the vertical central axis of the flow channel being 7 °, as can be seen from FIG. 1 of DE-AS 2043588.
  • This training leads to a large overall height of the rotary valve closure, which limits its possible uses.
  • the perforated plate rests on the lower housing part. Since the static pressure of the melt rests directly on the perforated plate, high surface pressures occur at the contact surface with the lower housing part, which creates the risk of the refractory perforated plate being destroyed.
  • the present invention has for its object to form a refractory stone pair of the type described above so that it no longer has the disadvantages described using a rotary valve closure not belonging to the prior art with a pivotable and lockable slide housing on containers provided with a bottom pouring opening for molten metal, the rotatable, frusto-conical pouring stone sitting in a drivable annular driver housing which is rotatably arranged in the slide housing of the rotary slide valve closure.
  • a rotary valve closure not belonging to the prior art with a pivotable and lockable slide housing on containers provided with a bottom pouring opening for molten metal, the rotatable, frusto-conical pouring stone sitting in a drivable annular driver housing which is rotatably arranged in the slide housing of the rotary slide valve closure.
  • Claim 1 states that the portion of the peripheral surface of the pouring stone, which is in contact with the annular driver housing, is spherical. This ensures a uniform contact of the rotatable pouring stone on the stationary cobblestone due to the adjustability of the pouring stone even with manufacturing-related dimensional deviations of the top and pouring stone.
  • the spherical portion of the peripheral surface of the pouring stone is arranged in the upper part below the sealing and sliding surface.
  • the pouring stone in the spherical section of its circumferential surface evenly distributed one or more projections for engaging in recesses in the driver housing of the rotary valve closure. This ensures that the pouring stone has a tight fit in the rotating driver housing during operation of the rotary slide valve closure.
  • the stationary cobblestone is cylindrical and has a bore for receiving a locking bolt arranged in the rotary valve closure.
  • head and pouring stone are advantageously designed so that the angle ⁇ on the one hand between the axis of rotation of the pouring stone with the vertical central axis of the flow channel and on the other hand between the sealing and sliding surface of the head and pouring stone and the horizontal in the range of 15 to 45 ° lies.
  • the angle ⁇ on the one hand between the axis of rotation of the pouring stone with the vertical central axis of the flow channel and on the other hand between the sealing and sliding surface of the head and pouring stone and the horizontal in the range of 15 to 45 ° lies.
  • the preferred range for the angle ⁇ also surprisingly leads to optimal sliding and sealing properties between the top and pouring stone.
  • the flow channel of the pouring stone can have an annular insert according to claim 6 in the region of the outlet opening. In this way, it is no longer necessary to provide flow channels with different diameters in the pouring stones, adapted to the desired flow rate of the poured metal melt. With the help of the ring-shaped insert, which is glued into the flow channel, for example, different flow rates can be set.
  • the rotary slide closure is arranged on the bottom of a vessel 1;
  • the vessel can be, for example, a ladle, as used in steelworks and foundries, or an intermediate vessel, as used in continuous casting.
  • the bottom of the vessel 1 consists of an outer metal jacket 2 with an inner refractory lining 3; in the area of a flow opening 4 in the metal jacket 2, this has a refractory floor stone 5 with a refractory perforated brick 6.
  • the main components of the rotary slide valve closure are a pair of stones according to the invention consisting of a stationary cobblestone 7 and a rotatable pouring stone 8, also a mounting plate 9 with a support ring 10, a slide housing 11 pivotably arranged on the mounting plate 9 with associated joint and Closure arrangements 12 and 13 and a driver housing 15 which is moved by a worm gear 14 and which carries the pouring stone 8.
  • the axis of rotation 16 of the pouring stone 8 and the central axis of the flow channels 17 and 18 intersect from the cobblestone 7 and pouring stone 8 in the plane of the outer outlet opening 19 of the flow channel 18 of the pouring stone 8 and run at an acute angle to the interior of the container ⁇ , which is 15 ° apart.
  • the opening of the flow channel 18 of the pouring stone 8 lying on the sliding and sealing surface 20 is guided in a circular arc and the flow channel 18 is opened or closed entirely or in part, while the outlet opening 19 of the flow channel 18 maintains its position so that the emerging jet of the melt does not migrate.
  • the mounting plate 9, which has an opening 21, is fastened below the opening 4 on the metal jacket 2, as shown in particular in FIG. 3; the mounting plate 9 carries on its upper side the support ring 10 attached thereto, which protrudes into the opening 4 in the metal jacket 2 and connects to the refractory floor stone 5.
  • the locking arrangement 13 consists of a threaded rod 22 with a ball head 23 and a housing 24 with a spring assembly and associated adjusting nut 25.
  • the ball head 23 is held on the edge of the mounting plate 9 in a correspondingly designed opening 26 by means of a locking plate 27.
  • the slide housing 11 is annular; it has on one side a recess 28 with a contact surface 29 for the closure arrangement 13 and on the other side a tubular section 30. This takes up a pivot axis 31 of the joint arrangement 12, the pivot axis 31 simultaneously forming the axis of the worm gear 14 with worm 32.
  • the axis 31 is mounted in the two lateral bearing eyes 33 of the mounting plate 9. So that the axis 31 can perform its double function as a pivot axis for the joint arrangement 12 and as an axis for the worm gear 14, two tubular bearings 34 sit on it, which are connected via flanges 35 to the tubular portion 30 of the slide housing 11 by screws; they each have an outer bearing surface 36 for the pivoting movement in the bearing eyes 33 and an inner bearing surface 37 for the rotational movement of the axis 31 as the drive axis of the worm gear.
  • a connecting piece 38 is fastened to a bearing eye 33 and has a flange 39; a drive motor 40 with reduction gear is attached to the flange 39 via a counter flange 41.
  • the end of the axle 31 projecting into the connecting piece 38 is connected to the stub shaft of the drive shaft 42 of the drive motor 40 via a coupling piece 43.
  • the bearing eyes 33, as shown in FIG. 3, and the connecting piece 38 are open at the side.
  • a helical lock 44 is used to lock the bearings 34 in the bearing eyes 33.
  • the refractory cobblestone 7 which has a metallic banding ring, is seated in the support ring 10. Its surface 45 lying towards the inside of the vessel lies against the contact surface 46 of the support ring 10. Its sealing and sliding surface 20 is inclined to the horizontal H by the angle ⁇ , which is 15 °.
  • a bolt 47 held in the support ring 10 and which engages in a bore 48 in the cobblestone 7 serves for the stationary mounting of the cobblestone 7.
  • the refractory pouring stone 8 is arranged in the driver housing 15, which has an annular configuration. Its circumferential surface 49 is spherical in the upper section below the sealing and sliding surface 20.
  • the inner surface 50 of the driver housing 15, which carries the pouring stone 8, is correspondingly hollow. In this way it is ensured that when the slide housing 11 is closed, the pouring stone 8 can set in the spherical guide if there are any manufacturing-related dimensional deviations and with its sliding and sealing surface 20 it lies tight against the corresponding surface of the cobblestone 7.
  • the driver housing 15 is rotatably mounted in the slide housing 11.
  • the driver housing 15 has an outer spherical section 51.
  • a correspondingly trough-shaped slide ring 52 which is arranged in the inner wall 53 of the slide housing 11, serves as a slide bearing for the rotational movement of the driver housing 15.
  • FIG. 1 further shows that the driver housing has recesses 55 on the inside in the upper part, into which projections 56 on the pouring stone 8 engage. When the pouring stone 8 is rotated, this prevents it from slipping in the driver housing 15.
  • the threaded rod 22 with the housing 24 arranged thereon is pushed into the recess 28 in the housing 11; the housing 24 lies against the contact surface 29 with the spring assembly arranged therein.
  • the associated adjusting nut 25 on the threaded rod 22 is then tightened by the operator with a torque wrench until the set contact pressure between the sliding and sealing surfaces 20 of the cobblestone 7 and the pouring stone 8 is reached.
  • FIG. 4 shows an embodiment of the refractory stone pair according to the invention, in which an annular insert 57 is arranged in the region of the outlet opening 19 of the flow channel 18 of the pouring stone 8.
  • the flow channel 18 is provided with a recess 58, the diameter of which is slightly larger than the outer diameter of the annular insert 57.
  • the ring-shaped insert 57 is fastened in the recess with a suitable adhesive.
  • the inner diameter of the annular insert 57 is selected in accordance with the desired flow rate of the molten metal to be poured off. This simplifies production because it is no longer necessary to produce headstones and pouring stones with different sized flow channels.
  • FIG. 4 further shows that the cobblestone 7 advantageously has a metallic banding ring 59 and the pouring stone 8 has a metallic covering 60, which serve to extend the life of the cobblestone and pouring stone.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP89122433A 1988-12-23 1989-12-05 Feuerfestes Steinpaar für einen Drehschieberverschluss Expired - Lifetime EP0379683B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89122433T ATE68384T1 (de) 1988-12-23 1989-12-05 Feuerfestes steinpaar fuer einen drehschieberverschluss.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3843456 1988-12-23
DE3843456 1988-12-23
DE3900961 1989-01-14
DE3900961A DE3900961C1 (enrdf_load_stackoverflow) 1988-12-23 1989-01-14

Publications (2)

Publication Number Publication Date
EP0379683A1 EP0379683A1 (de) 1990-08-01
EP0379683B1 true EP0379683B1 (de) 1991-10-16

Family

ID=25875545

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89122433A Expired - Lifetime EP0379683B1 (de) 1988-12-23 1989-12-05 Feuerfestes Steinpaar für einen Drehschieberverschluss

Country Status (4)

Country Link
US (1) US5038977A (enrdf_load_stackoverflow)
EP (1) EP0379683B1 (enrdf_load_stackoverflow)
JP (1) JPH02263562A (enrdf_load_stackoverflow)
DE (2) DE3900961C1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04367367A (ja) * 1991-06-11 1992-12-18 Nkk Corp ロータリノズル
JP2805559B2 (ja) * 1992-01-29 1998-09-30 鋼管機械工業株式会社 ロータリノズル
US6158843A (en) * 1997-03-28 2000-12-12 Lexmark International, Inc. Ink jet printer nozzle plates with ink filtering projections

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE384988C (de) * 1922-03-30 1923-12-04 Ernst Herbert Kuehne Abflussgesperre fuer Schmelzoefen
SU180308A1 (ru) * 1962-09-18 1966-03-21 В. Е. Гирский , Е. С. Борисовский Сборный стакан для промежуточных ковшей установок непрерывной разливки стали
DE2043588C3 (de) * 1970-09-03 1973-11-08 Didier-Werke Ag, 6200 Wiesbaden Drehschieberverschluß an Behaltern fur flussige Schmelze
CH553610A (de) * 1971-06-09 1974-09-13 Bieri Hans Verschlusseinrichtung fuer die am boden angeordneten auslassoeffnungen von giesspfannen oder zwischenbehaeltern.
US3912134A (en) * 1974-04-29 1975-10-14 Danieli Off Mecc Rotary sliding gate valve for molten metal
AU591889B2 (en) * 1985-03-26 1989-12-21 British Steel Plc Improvements in or relating to outlet valves for metal containing vessels
CH673239A5 (enrdf_load_stackoverflow) * 1987-12-15 1990-02-28 Stopinc Ag

Also Published As

Publication number Publication date
US5038977A (en) 1991-08-13
EP0379683A1 (de) 1990-08-01
DE58900383D1 (de) 1991-11-21
JPH02263562A (ja) 1990-10-26
DE3900961C1 (enrdf_load_stackoverflow) 1990-01-18

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