EP0393223A1 - Plaque réfractaire obturatrice pour obturateurs coulissants - Google Patents

Plaque réfractaire obturatrice pour obturateurs coulissants Download PDF

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Publication number
EP0393223A1
EP0393223A1 EP89107146A EP89107146A EP0393223A1 EP 0393223 A1 EP0393223 A1 EP 0393223A1 EP 89107146 A EP89107146 A EP 89107146A EP 89107146 A EP89107146 A EP 89107146A EP 0393223 A1 EP0393223 A1 EP 0393223A1
Authority
EP
European Patent Office
Prior art keywords
plate
plate according
cavities
flow opening
cracks
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
EP89107146A
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German (de)
English (en)
Other versions
EP0393223B1 (fr
Inventor
Michael Moers
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.)
Metacon AG
Original Assignee
Metacon AG
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 Metacon AG filed Critical Metacon AG
Priority to AT89107146T priority Critical patent/ATE100365T1/de
Priority to DE89107146T priority patent/DE58906775D1/de
Priority to ES89107146T priority patent/ES2048780T3/es
Priority to EP89107146A priority patent/EP0393223B1/fr
Publication of EP0393223A1 publication Critical patent/EP0393223A1/fr
Application granted granted Critical
Publication of EP0393223B1 publication Critical patent/EP0393223B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
    • B22D41/28—Plates therefor

Definitions

  • the invention relates to a fire-resistant closure plate for slide closures on metallurgical vessels, which has at least one flow opening and a sliding surface and is exposed to thermal stresses with cracks during operation as a consequence.
  • closure plates applies to all refractory plates which are interchangeably arranged as wear material in slide closures and which are used as base plates, slide plates, intermediate plates and lower plates in linear, rotary and pivoting slides.
  • naked refractory plates are now mortared into a sheet metal jacket and the prefabricated units are inserted into the corresponding plate frames of the slide lock.
  • Further known designs consist in that the bare closure plate is provided with a circumferential hoop or is clamped in a bandage band forming part of the plate frame, see for example DE-053421205.
  • the object of the present invention is to prevent the development of air-permeable stress cracks in a closure plate towards the flow opening by simple technical means.
  • the object is achieved according to the invention in that at points of potential crack formation through the thickness of the plates, cracks forming in the plate material are collected and at the same time relieving cavities.
  • the cavities are expediently provided around the flow opening of a plate in temperature ranges below 500 ° C. and are designed as bores that pass through the plate thickness. Drilling is easy to do and has a relieving and compensatory effect in the comparatively low temperature ranges, while the most heavily loaded plate area near the flow opening is hardly affected in terms of strength.
  • transversely extending recesses can also advantageously be provided on the circumferential surface of the plate, for example in the form of notches. With such a procedure, the crack formation at a desired plate location can be provoked.
  • a crack-sealing sealant is arranged in the cavity or in the bore or notch.
  • the sealant has an instantaneous closing function if a crack forms on the wall of a relief bore or a notch or a cavity. The outside air is no longer able to penetrate through a crack to the melt flowing through the flow opening.
  • a ceramic mass which becomes plastic to viscous at operating temperature and which seals by being molded onto a crack and which can advantageously also have a glass-like structure serves as the sealant.
  • a sealing piece made of ceramic material which is inserted into a bore or a notch and which seals a crack which arises due to its own thermal expansion.
  • A is a linear closure plate with a flow opening 1, a sliding surface 2 and a circumferential surface 3.
  • the plate A is a type which is held in a mortar bed in a metallic plate frame (not shown for the sake of simplicity).
  • Relieving cavities are arranged around the flow opening 1 of the plate A in the form of relief bores 4 which are guided through the plate thickness and which have a stress-reducing effect in the plate material which is stressed by thermal stresses. But above all, they pull in temperature ranges bores below 500.degree. C. are subject to stress cracking 5 occurring on the peripheral surface 3 of the plate A and prevent progressive crack formation 5a up to the flow opening 1, as indicated by dashed lines.
  • the cracks 5 forming on the circumferential surface 3 of a sheet metal tire 6 and clamped in the plate frame by means of eccentrics 7 have their origin at the point of action of the eccentric 7, from there one or more cracks 5 grow on the Flow opening 1 to in order to be stopped by one or more relief bores 4 provided in the expected crack direction.
  • a similar pressure point crack pattern is given in the case of the rotary plate C according to FIG. 3, which likewise has a sheet metal tire 9 and is clamped in the plate frame by means of pressure strips 10. Cracks 5, which strive for the two flow openings 1 and thereby open in relief bores 4, preferably arise on the area of the peripheral surface 3 which is stressed by the pressure strips 10. In most constructions, however, in which the plate material is loaded by a pressure which acts largely uniformly on the peripheral surface 3 of the plate, stress cracks occur at the weakest plate locations between the flow opening 1 and the area directly opposite the peripheral surface 3. Thus in the case of the linear closure plate D according to FIGS.
  • a sealing compound 13 filled into the relief bores 4 which has a plastic to viscous consistency when the slide is in operation, and automatically seals any cracks formed in the peripheral wall of the bores 4.
  • the relief bores which have a diameter of between 0.5 and 25 mm, depending on the size of the plate, also serve as chambers for receiving a crack-sealing sealant, which ultimately blocks the access of air into the melt flowing in the flow opening 1.
  • the relief bores 4 receiving a crack sealant 13 can be formed in a blind hole-like manner, for example by inserting plugs 15 into the bores 4 from the free plane side 14.
  • the embodiment according to FIGS. 7 and 8 has an annular sealing piece 16 in the relief bore 4 which corresponds to the thickness of the plate F and which seals cracks 5 and 5a on the relief bore 4 by its own thermal expansion. Both a crack 5 starting from the peripheral surface 3 and a continuation crack 5a drawn in dashed lines and extending beyond the relief bore 4.
  • the embodiment according to FIG. 9 also has a stress-relieving and crack-sealing effect, with a plate G that is circumferentially braced by a sheet metal strip 17, on the circumferential surface 3 of which recesses 18 carrying a sealing piece 19 are provided through the plate thickness.
  • a hairline crack formation is established on the notch-like recess 18, which represents a cavity, and a crack 5a which is formed is sealed at the same time by the thermal expansion of the sealing piece 19.
  • the triangular cross-section of the recess or the cavity other, for example semicircular or semi-elliptical, cross-sections are also possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Sliding Valves (AREA)
EP89107146A 1989-04-20 1989-04-20 Plaque réfractaire obturatrice pour obturateurs coulissants Expired - Lifetime EP0393223B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT89107146T ATE100365T1 (de) 1989-04-20 1989-04-20 Feuerfeste verschlussplatte fuer schieberverschluesse.
DE89107146T DE58906775D1 (de) 1989-04-20 1989-04-20 Feuerfeste Verschlussplatte für Schieberverschlüsse.
ES89107146T ES2048780T3 (es) 1989-04-20 1989-04-20 Placas refractarias de valvula para valvulas de compuerta deslizante.
EP89107146A EP0393223B1 (fr) 1989-04-20 1989-04-20 Plaque réfractaire obturatrice pour obturateurs coulissants

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89107146A EP0393223B1 (fr) 1989-04-20 1989-04-20 Plaque réfractaire obturatrice pour obturateurs coulissants

Publications (2)

Publication Number Publication Date
EP0393223A1 true EP0393223A1 (fr) 1990-10-24
EP0393223B1 EP0393223B1 (fr) 1994-01-19

Family

ID=8201261

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89107146A Expired - Lifetime EP0393223B1 (fr) 1989-04-20 1989-04-20 Plaque réfractaire obturatrice pour obturateurs coulissants

Country Status (4)

Country Link
EP (1) EP0393223B1 (fr)
AT (1) ATE100365T1 (fr)
DE (1) DE58906775D1 (fr)
ES (1) ES2048780T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3399170B1 (fr) * 2016-02-04 2024-02-14 Mitsubishi Heavy Industries Aero Engines, Ltd. Élément d'aéronef et moteur à turbine à gaz pour aéronef

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1198793A (en) * 1966-07-13 1970-07-15 North London Saw Works Ltd Improvements in or relating to Circular Saw Blades
BE870653A (nl) * 1978-09-21 1979-01-15 Verhas Hugo P Gedempte zaag
DE3432613C1 (de) * 1984-09-05 1985-05-02 Didier-Werke Ag, 6200 Wiesbaden Feuerfeste Platte fuer Schieberverschluesse an metallurgischen Gefaessen
EP0222978A1 (fr) * 1985-10-30 1987-05-27 Didier-Werke Ag Plaque d'usure réfractaire pour obturateurs coulissants de récipients métallurgiques

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1198793A (en) * 1966-07-13 1970-07-15 North London Saw Works Ltd Improvements in or relating to Circular Saw Blades
BE870653A (nl) * 1978-09-21 1979-01-15 Verhas Hugo P Gedempte zaag
DE3432613C1 (de) * 1984-09-05 1985-05-02 Didier-Werke Ag, 6200 Wiesbaden Feuerfeste Platte fuer Schieberverschluesse an metallurgischen Gefaessen
EP0222978A1 (fr) * 1985-10-30 1987-05-27 Didier-Werke Ag Plaque d'usure réfractaire pour obturateurs coulissants de récipients métallurgiques

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 12, Nr. 340 (M-740)[3187], 13. September 1988; & JP-A-63 101 069 (TOSHIBA CERAMICS CO. LTD) 06-05-1988 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3399170B1 (fr) * 2016-02-04 2024-02-14 Mitsubishi Heavy Industries Aero Engines, Ltd. Élément d'aéronef et moteur à turbine à gaz pour aéronef

Also Published As

Publication number Publication date
EP0393223B1 (fr) 1994-01-19
DE58906775D1 (de) 1994-03-03
ATE100365T1 (de) 1994-02-15
ES2048780T3 (es) 1994-04-01

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