EP0711970A1 - Soulier de protection utilisé sur le transporteur à longerons d'un four à longerons mobiles - Google Patents

Soulier de protection utilisé sur le transporteur à longerons d'un four à longerons mobiles Download PDF

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Publication number
EP0711970A1
EP0711970A1 EP95116317A EP95116317A EP0711970A1 EP 0711970 A1 EP0711970 A1 EP 0711970A1 EP 95116317 A EP95116317 A EP 95116317A EP 95116317 A EP95116317 A EP 95116317A EP 0711970 A1 EP0711970 A1 EP 0711970A1
Authority
EP
European Patent Office
Prior art keywords
shoe according
segments
covering
cover
segment
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.)
Withdrawn
Application number
EP95116317A
Other languages
German (de)
English (en)
Inventor
Siegfried Zündorff
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.)
Dw Schulte & Co KG GmbH
Original Assignee
Dw Schulte & Co KG 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 Dw Schulte & Co KG GmbH filed Critical Dw Schulte & Co KG GmbH
Publication of EP0711970A1 publication Critical patent/EP0711970A1/fr
Withdrawn legal-status Critical Current

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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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/201—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace walking beam furnace
    • 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
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types

Definitions

  • the invention relates to a cover shoe which is arranged on the standing tube of the walking beam conveyor of a walking beam furnace and covers an opening of the furnace floor which is penetrated by the standing tube.
  • Walking beam furnaces also known in practice as beam hearth furnaces, are known to be used in the steel industry for heating slabs, blocks, billets and the like. used on the rolling temperature. They have a beam hearth in the form of a walking beam conveyor, with which the slabs to be heated or the like. are gradually conveyed through the furnace chamber until they finally leave the furnace when heated to the required temperature.
  • the walking beam conveyors consist of walking beams which are supported by vertical supports, the so-called stand pipes, and which are given the working movement in the form of a rectangular orbit over the stand pipes.
  • the latter consist of high-strength steel pipes with a ceramic jacket and associated pipe cooling.
  • the standpipes pass through approximately slot-shaped openings on the furnace sole, and the drive of the walking beam conveyor and additional units can be arranged below the furnace sole or the furnace floor.
  • the object of the invention is above all to create the aforementioned problems and the disadvantages previously accepted by an improved covering shoe, which is characterized above all by a considerably increased service life and, if possible, also improved covering or protective effect.
  • the cover shoe consists of a highly heat-resistant ceramic material and is composed of several segments.
  • a refractory ceramic material with high thermal shock resistance is preferably used for the cover shoe.
  • the cover shoe according to the invention which is made of the highly heat-resistant ceramic material, is distinguished at the high furnace temperatures by a considerably longer service life than the covers used previously. It can also be made so large in its dimensions that a significantly improved covering and protective effect is achieved, so that the heat losses through heat radiation through the bottom openings of the walking beam furnace considerably reduced and the thermal stresses of the operating facilities located below the furnace floor are considerably reduced.
  • the cover shoe according to the invention is made in several parts; it consists of segments which can be joined together on the standpipe to form the cover shoe and which enclose the standpipe, that is to say together form a standpipe bushing on the cover shoe.
  • this is expediently provided with a support for the cover shoe.
  • This support can be made relatively narrow, so that it lies essentially completely in the cooling zone of the standpipe and is consequently removed from the furnace temperature leading to its scaling when it is made of high-strength steel or cast steel.
  • a simple support ring is appropriately provided on the standpipe.
  • the cover shoe consists of two segments, preferably in such a design that each of these two segments has an approximately semi-cylindrical shape, these two shapes jointly forming the standpipe bushing.
  • the segments are expediently designed so that they can be releasably connected to form the cover shoe, preferably with the aid of a simple plug connection or the like.
  • a cover ring to the standpipe at a distance above the aforementioned support or the support ring forming it, which, like the support ring, can be dimensioned so narrow in its radial dimension that it is also located in the cooling area of the standpipe cooling.
  • the cover ring can also consist of a steel or cast steel ring. The arrangement can be advantageously made so that the support ring and the cover ring together form a receiving pocket into which the segments of the cover shoe radially from the outside can be inserted so that they closely surround the standpipe.
  • the cover shoe according to the invention can be easily and quickly attached to the standpipe.
  • the segments of the cover shoe can be plugged together by means of a simple plug-in connection and if the cover shoe is formed from two segments that can be attached and joined to the standpipe from the opposite sides.
  • the one segment of the cover shoe has an insert pocket or the like which is open at the edge. in which the other segment can be inserted from the outside in the manner of a bolt.
  • Elements are expediently formed on the segments by a tongue and groove connection, so that they can be joined together while being aligned.
  • connection of the segments to one another is expediently carried out by means of connecting elements which likewise consist of a highly heat-resistant ceramic material which can correspond to that of the covering shoe.
  • These connecting elements advantageously consist of simple plug pins.
  • the segments of the cover shoe have pocket shapes which together form a, preferably cylindrical, bolt pocket for the plug pin.
  • a particularly advantageous design of the cover shoe according to the invention is obtained if one segment of the cover shoe is shaped as an insertion fork that is open to its rear, on the bottom of which the aforementioned semi-cylindrical shape is molded, which with the semi-cylindrical shape of the other segment that can be inserted into the insertion fork as a locking bolt the standpipe bushing forms.
  • one segment has considerably larger dimensions than the other segment, which essentially has the function of a closure piece.
  • the cover shoe is advantageously held on the standpipe by means of a support ring attached to it, suitably in connection with a cover ring. It is advisable to arrange holding means on the support ring and / or cover ring which serve for the rotationally fixed connection of the segments with the support or cover ring and therefore with the standpipe.
  • These holding means can consist of holding cams arranged on the support ring and / or on the cover ring and recesses arranged on the segments for the engagement of the holding cams.
  • the cover shoe made of refractory ceramic material according to the invention can have relatively large dimensions, so that it completely or at least largely covers the associated bottom opening on the furnace bottom.
  • the cover shoe can advantageously be designed so that one segment, seen radially to the standpipe, has a greater length than its other segment.
  • the segment which is longer in the radial direction is expediently designed in such a way that it tapers in width toward its free, rounded end.
  • the thickness of the covering shoe according to the invention is advantageously approximately 60 to 130 mm, preferably 90 to 110 mm.
  • the standpipes 1 show the arrangement of the covering shoes on the vertical individual supports of the walking beam conveyor formed by standpipes 1 in a greatly schematic simplification and in a partial section of a walking beam furnace.
  • the standpipes 1 have a casing 3 made of refractory ceramic material in the furnace space above the furnace base 2 and are, as usual, provided with tube cooling.
  • the stand pipes 1 are part of the beam hearth, which is designed as a walking beam conveyor.
  • the standpipes, of which only two are shown in FIG. 1, carry lifting beams, not shown, which extend in the direction of passage F and are optionally connected by crossbars or, as shown in simplified form in FIG.
  • crossbars 4 as supports for those in the walking beam furnace to be heated slabs 5 or other parts which are heated to the rolling temperature in the direction of arrow F as they pass through the walking beam furnace.
  • the walking beam conveyor with the stand pipes 1 and the ones carried by them, the support for the slabs 5 or the like.
  • the forming bar executes the working movement indicated in the diagram according to FIG. 1 in the form of a rectangular orbit, the feed path in the direction of passage F is indicated by arrow S and the return stroke is indicated by arrow R.
  • the operation of the walking beam furnace or the walking beam conveyor is known, so that no further explanation is required.
  • the upright tubes 1 with their lower end regions pass through openings 6 on the furnace floor 2, these openings being approximately slit-like in such a way that the working movements of the walking beam conveyor and its upright tubes 1 are possible in accordance with the diagram shown.
  • the openings 6 thus have a length in the direction of passage F which is the same or slightly larger than the feed path S.
  • the drive of the walking beam conveyor together with further operating devices can be located below the furnace floor.
  • cover shoes 7 are arranged on the stand pipes 1, which cover the floor openings 6 and which, according to the invention, consist of a highly heat-resistant ceramic material, preferably one with high thermal shock resistance.
  • each cover shoe 7 is made in two parts. It is composed of two segments 8 and 9, each of which is made of the highly heat-resistant ceramic material and which are attached to the standpipe 1 and joined together to form the cover shoe.
  • the ceramic sheathing of the standpipe 1, which comes close to the cover shoe 7, is not shown.
  • a support ring 10 and a cover ring 11 at a distance above it, for example by welding, are fastened to the standing tube 1 as a support for the cover shoe 7.
  • the support ring 10 and the cover ring 11 each have only a relatively small radial width. They are therefore still in the cooling area of the standpipe cooling.
  • the vertical distance between the support ring 10 and the cover ring 11 corresponds essentially to the thickness of the cover shoe 7 or its segments 8 and 9.
  • the support ring 10 and the cover ring 11 form a receiving pocket for the segments 8 and 9 of the cover shoe 7 which surrounds the standing tube 1 in a ring.
  • the segments 8 and 9 protrude beyond the circumference of the support ring 10 and the cover ring 11.
  • the segment 8 tapers in the direction of passage F (FIG. 1) towards its free, rounded end 8 ′ the width.
  • the thickness of the two segments 8 and 9 is expediently approximately 90 to 110 mm, but can also deviate up or down from this thickness dimension.
  • Each of the two segments 8 and 9 has an approximately semi-cylindrical shape 12 or 13 which is adapted to the diameter of the standing tube 1 and which together form the standing tube bushing.
  • the segment 8 has on its rear side opposite the free end 8 'an integrally formed insertion fork 14 with the two parallel fork cheeks 15, with the bottom of the insertion fork 14 having the semi-cylindrical shape 12 formed on it with the semi-cylindrical shape 13 of the other segment 9 the standpipe bushing forms.
  • the insertion fork 15 thus forms an insertion pocket which is open on the edge and into which the other segment 9 can be inserted in the manner of a locking bolt or locking piece with positive locking, as is shown above all in FIGS. 2 to 4.
  • approximately semicircular grooves 16 are formed on the inside of the fork legs 15 of the segment 8 and on their opening area, and correspondingly shaped spring elements 17 are formed on the outside on the two parallel side edges of the other segment 9.
  • Form spring connections When the segment 9 is inserted into the insertion fork 14 of the other segment 8, the spring elements 17 slide into the grooves 16, whereby a positive sliding connection between the segments is effected.
  • 2 and 3 in particular show that retaining cams 18 which project upwards on diametrically opposite sides are fastened to the support ring 10 and, when the cover shoe 7 is mounted on the standpipe 1, engage in recesses 19 from below which, like FIG.
  • connecting elements which are also made of a highly heat-resistant ceramic material.
  • these connecting elements consist of cylindrical socket pins 20 which are inserted from above into approximately semi-cylindrical pocket shapes 21, 22 of the segments 8 and 9, as a result of which they are detachably connected to one another in their mounting position on the standing tube 1.
  • the pocket formations 21 are located on the fork legs 15 of the segment 8 above the molded grooves 16 (FIG. 4), while the corresponding semi-cylindrical pocket formations 22 are arranged on the two opposite sides of the segment 9, above the spring elements 17.
  • the larger segment 8 When the cover shoe 7 is installed, the larger segment 8 can first be inserted from one side into the receiving pocket formed by the support ring 10 and the cover ring 11, with its centering recess 19 being pushed into the holding cams 18.
  • the smaller segment 9 can then be inserted into the receiving pocket from the opposite side and the insertion fork 14 are inserted, the tongue and groove connections 16, 17 effecting a positive connection and guidance.
  • the segment 9 In the inserted state, the segment 9 is locked against rotation by the engagement of the holding cam 18 in its recess 19 with respect to the standpipe 1.
  • the ceramic plug pins 20 can then be inserted from above into the insertion pockets formed by the corresponding pocket recesses 21, 22, as a result of which the two segments 8 and 9 are connected to one another and fixed on the standpipe 1.
  • the invention is not limited to the preferred exemplary embodiment of the covering shoe 7 described above.
  • the cover shoe 7 could also consist of more than two segments, e.g. three segments, or be formed in a two-part design from two half-parts, for example in such a way that it is divided along its longitudinal central axis, the two half-parts also expediently or similarly by plug connections. get connected.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
EP95116317A 1994-11-11 1995-10-17 Soulier de protection utilisé sur le transporteur à longerons d'un four à longerons mobiles Withdrawn EP0711970A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4440275 1994-11-11
DE19944440275 DE4440275A1 (de) 1994-11-11 1994-11-11 Abdeckschuh zur Verwendung am Hubbalkenförderer eines Hubbalkenofens

Publications (1)

Publication Number Publication Date
EP0711970A1 true EP0711970A1 (fr) 1996-05-15

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Application Number Title Priority Date Filing Date
EP95116317A Withdrawn EP0711970A1 (fr) 1994-11-11 1995-10-17 Soulier de protection utilisé sur le transporteur à longerons d'un four à longerons mobiles

Country Status (2)

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EP (1) EP0711970A1 (fr)
DE (1) DE4440275A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3757497A1 (fr) * 2019-06-24 2020-12-30 Intocast AG Chaussure de rayonnement
WO2022156932A1 (fr) * 2021-01-21 2022-07-28 Andritz Metals Germany Gmbh Sabot de protection pour fours à longerons mobiles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021113043A1 (de) * 2021-05-19 2022-11-24 Loi Thermprocess Gmbh Abdeckeinrichtung zur Verwendung in einem Hubbalkenofen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1581936A (fr) * 1967-10-25 1969-09-19
JPS59200717A (ja) * 1983-04-28 1984-11-14 Nippon Steel Corp 鋼片加熱炉の移動ビ−ムポスト開孔部の遮蔽構造
FR2566516A1 (fr) * 1984-06-21 1985-12-27 Gautschi Electro Fours Sa Four continu pour objets metalliques
EP0280079A1 (fr) * 1987-02-24 1988-08-31 ITALIMPIANTI Società Italiana Impianti p.a. Four à longerons mobiles
US4838785A (en) * 1988-07-05 1989-06-13 Cameron Forge Company Walking beam furnace insulation
JPH05163547A (ja) * 1991-12-12 1993-06-29 Kubota Corp 炉床開口カバー支持用部材

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1581936A (fr) * 1967-10-25 1969-09-19
JPS59200717A (ja) * 1983-04-28 1984-11-14 Nippon Steel Corp 鋼片加熱炉の移動ビ−ムポスト開孔部の遮蔽構造
FR2566516A1 (fr) * 1984-06-21 1985-12-27 Gautschi Electro Fours Sa Four continu pour objets metalliques
EP0280079A1 (fr) * 1987-02-24 1988-08-31 ITALIMPIANTI Società Italiana Impianti p.a. Four à longerons mobiles
US4838785A (en) * 1988-07-05 1989-06-13 Cameron Forge Company Walking beam furnace insulation
JPH05163547A (ja) * 1991-12-12 1993-06-29 Kubota Corp 炉床開口カバー支持用部材

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI 14 October 1993 Derwent World Patents Index; AN 17567 *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 66 (C - 271)<1789> 26 March 1985 (1985-03-26) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3757497A1 (fr) * 2019-06-24 2020-12-30 Intocast AG Chaussure de rayonnement
WO2022156932A1 (fr) * 2021-01-21 2022-07-28 Andritz Metals Germany Gmbh Sabot de protection pour fours à longerons mobiles

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Publication number Publication date
DE4440275A1 (de) 1996-05-15

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