EP0002052B1 - Procédé et dispositif pour assurer le déplacement dans des fours tunnels de plaques de cuisson qui traversent le four - Google Patents

Procédé et dispositif pour assurer le déplacement dans des fours tunnels de plaques de cuisson qui traversent le four Download PDF

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Publication number
EP0002052B1
EP0002052B1 EP78101368A EP78101368A EP0002052B1 EP 0002052 B1 EP0002052 B1 EP 0002052B1 EP 78101368 A EP78101368 A EP 78101368A EP 78101368 A EP78101368 A EP 78101368A EP 0002052 B1 EP0002052 B1 EP 0002052B1
Authority
EP
European Patent Office
Prior art keywords
plates
balls
grooves
pads
plate
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
Application number
EP78101368A
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German (de)
English (en)
French (fr)
Other versions
EP0002052A1 (fr
Inventor
Sten Chronberg
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.)
Bpifrance Financement SA
Original Assignee
Agence National de Valorisation de la Recherche ANVAR
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Publication of EP0002052A1 publication Critical patent/EP0002052A1/fr
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Publication of EP0002052B1 publication Critical patent/EP0002052B1/fr
Expired 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
    • F27B9/24—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 being carried by a conveyor
    • F27B9/2469—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 being carried by a conveyor the conveyor being constituted by rollable bodies

Definitions

  • the present invention relates to a method and a device for ensuring the displacement in tunnel ovens, in particular for the firing at high temperature of ceramic products, of cooking plates which pass through the oven while supporting the products to be cooked. More precisely, the invention relates to applications to ovens of the type according to which the entire row of plates which roll on balls supported in raceways is pushed to one end of the oven, while parallel grooves of the same spacing as said paths are formed on the underside of the plates to receive the balls which simultaneously provide lateral guidance of the plates.
  • said plates are supported by a limited number of said balls which roll in said raceways and in parallel grooves of the same spacing formed on the underside of the plates, providing in said grooves more hollow and more protruding parts so that when a ball passes under a said projection it locally supports a plate by simultaneously releasing at least the largest part of the load the balls of the same raceway, possibly located near said projection under said part more hollow.
  • the invention also relates to a device allowing the implementation of the aforementioned method, this device being characterized in that the grooves formed on the underside of the plates have more projecting parts forming pads on which roll said plates when a ball is present in the raceway perpendicular to a said shoe.
  • At least one pad is preferably provided on each side of said plates on either side of the median plane parallel to the direction of advancement of the plates and at least three pads are provided for each plate.
  • each is usually supported by three pads which each roll on a ball which advancing at half the speed of the plate is replaced - after a certain distance by another ball present in the raceway and as will appear later.
  • Figure 1 is a schematic view in vertical section through a tunnel oven having cooking plates advancing on rows of balls;
  • Figure 2 is a longitudinal sectional view taken on a larger scale and with cutaway along a tunnel oven substantially in the plane of uri ball race as marked II-II in Figure 3;
  • Figure 3 is a horizontal sectional view made from below substantially by the plane III-III of Figure 2 is illustrating the two parallel raceways supporting the cooking plates:
  • Figure 4 is a vertical sectional view made in the plan IV-IV identified in Figures 2 and 3;
  • Figure 5 is a partial view showing like Figure 3 an alternative embodiment of the grooves formed under the cooking support plates;
  • Figure 6 is a sectional view taken along the plane VI-VI of Figure 5;
  • Figure 7 is a sectional view longitudinal vertical made through a raceway and showing how it is made;
  • Figure 8 is a cross-sectional view along the plane VIII-VIII of Figure 7 illustrating with this figure a process for the manufacture of these raceways;
  • Figure 9 is a longitudinal sectional
  • FIG. 1 schematically illustrating a tunnel oven comprising support plates S rolling on balls b themselves guided on two raceways 1, 2.
  • the plates S support products to be cooked 3 in the heated enclosure 4 of the oven, the insulating wall of which is marked 5.
  • heating means have been identified, for example by radiation.
  • the support plates S are formed, on their underside (see FIG. 4) with grooves 7, 8 parallel and likewise spacing as the raceways 9, 10 in which the balls roll b.
  • these grooves 7, 8 have more projecting parts forming pads p and more hollow parts c.
  • each support plate S is formed with three pads, such as p1, p2, p6 for the plate S1 and p3, p7, p8 for the plate S2, these pads being arranged in staggered rows creating a load support triangle favorable for the plate.
  • Two pads such as p1-p2, p7-p8 on one side of the plate are separated by a hollow c1, c7, while each insulated pad on the other side such as p6, p3 is surrounded by two hollow parts such than c5-c6, c2-c3.
  • these are formed by gutters, as horizontal and continuous as possible.
  • these ceramic gutters such as the balls b and the cooking plates S are mounted end to end with their ends interlocking by half-thick fillet as will be described in more detail in FIG.
  • FIG. 2 shows three gutters g1, g2, g3 forming part of the raceway 9, and in FIG. 4 a gutter g7 forming part of the other raceway 10.
  • the gutters g are supported on the hearth of the oven (not shown) by the rails or paths 11, 17 which at the same time prevents them from turning thanks to the provision of tenons 12 projecting from the support surface 13 of the gutters at each end d 'them and entering a mortise 14 ( Figure 7) corresponding to the gutter.
  • each support plate S is formed at one end with a bevelled part 15 which penetrates into a corresponding hollow part 16 adjacent to the next plate.
  • the balls such as b2, b3, b13, b15, b16, b17 located under recessed parts c1, c5, c6 of the plate S1 will not be affected by the movement of the plate S1 as long as 'they will remain under these hollow parts without contact with the plate S1. These balls therefore remain stationary.
  • the three balls b1, b4, b14 which support the plate S1 advance at the same time as this plate by rolling under them and at half the speed of advancement of the plate. This will happen as long as the balls are under the skates.
  • a shoe length of the order of 3 to 5 times the diameter of a ball will be chosen.
  • the balls are 10mm in diameter, the pads and the recesses having lengths of the order of 40mm.
  • FIG. 3 shows in broken lines the balls at rest such as b2, b3, b5 which do not roll being under hollow parts of the support plates S, and in solid lines the balls such as b1, b4, b7 which roll and support the plates by their pad p.
  • the width of the rolling grooves with their more hollow parts c and their parts in shoe p is substantially equal to the diameter of the balls.
  • the gutters g will have a slightly larger diameter than that of the balls so as to ensure good rolling and simultaneously correct lateral guidance of the plates.
  • the hollow parts c ′ of the support plates S ′ are given a width greater than that of the pads p which remains substantially equal to the diameter of the balls.
  • the balls such as b5, b6, b8, b9 are not entrained with greater certainty when they are in their race under hollow parts such as c'2, c'3.
  • good lateral guidance of the support plates S ' is retained by the pads of reduced width such as p3.
  • FIG. 7 and 8 illustrated in more detail the gutters g1, g2, g3 constituting the active part of the raceway receiving the balls.
  • Each gutter g is formed from an inner ceramic tube 20 on which is sealed a tube 21 also made of ceramic of slightly larger diameter and the same length with a longitudinal offset 1.
  • the composite tube thus produced can then be cut, for example with a grinding wheel 22 as illustrated in FIG. 8 along a diameter to leave the gutter g.
  • a mortise 14 for engaging the tenon 12 (FIGS. 2 and 4) preventing the gutters from rolling on their supports 11, 17.
  • the longitudinal offset 1 of the tubes 20, 21 provides a connection by interlocking at half-thickness of the gutters g forming end-to-end the raceway of the balls.
  • FIGS. 9 and 10 in which another embodiment of the invention is illustrated, which is particularly well suited to transporting heavy loads in an oven.
  • each support plate which can be relatively thick such as S1 two grooves 30, 31 are formed parallel to the raceways of the balls and in which grooves are added pads such as p11, p21 (FIG. 10) mounted captive in said grooves but with a certain vertical clearance.
  • each support S comprises on each side four pads thus mounted, such as p11, p12, p13, p14 (FIG. 9).
  • the pads cannot escape out of said grooves thanks to the provision of end-locking pieces 32, 33 for example of ceramic suitably cemented at the ends of said grooves.
  • these gutters are formed by ceramic gutters such as 34, 35, 36, 37 mounted end-to-end and kept in alignment by any suitable means such as keying also ceramic 38 ( Figures 9 and 12); these gutters are themselves supported on rails or raceways 39, 40 and prevented from turning thanks to grooves 41 suitably engaged on the support rails 39, 40.
  • the operation of the device is as follows.
  • each plate such as for example that S11 encounters under its skids a certain number of balls which roll in the underlying raceways. Due to the relatively large loads (not shown) placed on the support plates S, these deform more or less and work in bending and torsion. Under these conditions, and depending on the clearances of the raceways, balls of different diameters, etc. each support plate S is supported at a given time by only a certain number of its pads, for example the pads p11 1 and p14 for the plate S11 as regards the raceway 39, these pads rolling on two balls b30, b33 .
  • FIG. 11 shows a plate S'11 with pads p'12 p'21 shaped in slightly different ways but also also mounted prisoners in grooves 30 ', 31' according to the same operating principle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Tunnel Furnaces (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
EP78101368A 1977-11-22 1978-11-15 Procédé et dispositif pour assurer le déplacement dans des fours tunnels de plaques de cuisson qui traversent le four Expired EP0002052B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7735056A FR2409475A1 (fr) 1977-11-22 1977-11-22 Procede et dispositif pour assurer le deplacement dans des fours tunnels de plaques de cuisson qui traversent le four
FR7735056 1977-11-22

Publications (2)

Publication Number Publication Date
EP0002052A1 EP0002052A1 (fr) 1979-05-30
EP0002052B1 true EP0002052B1 (fr) 1981-11-25

Family

ID=9197896

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78101368A Expired EP0002052B1 (fr) 1977-11-22 1978-11-15 Procédé et dispositif pour assurer le déplacement dans des fours tunnels de plaques de cuisson qui traversent le four

Country Status (5)

Country Link
US (1) US4243378A (it)
EP (1) EP0002052B1 (it)
DE (1) DE2861376D1 (it)
FR (1) FR2409475A1 (it)
IT (1) IT1162115B (it)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3217076A1 (de) * 1982-05-06 1983-11-10 Agrob Anlagenbau GmbH, 8045 Ismaning Vorrichtung zur waermebehandlung von stueckigem gut bei hoher temperatur
IT1205512B (it) * 1986-12-30 1989-03-23 Mauro Poppi Forno per la cottura di materiali ceramici quali piastrelle e simili
US5428861A (en) * 1993-08-02 1995-07-04 Motorola Method and apparatus for cleaning a processing tube
JP3469746B2 (ja) * 1997-07-25 2003-11-25 株式会社ノリタケカンパニーリミテド アルミナ質多孔質担体の製造方法
US6464860B1 (en) 2000-07-05 2002-10-15 Oren V. Peterson Process and apparatus for generating carbon monoxide and extracting oil from oil shale
FR2995987B1 (fr) * 2012-09-21 2019-05-10 Ceritherm Four de cuisson a haute temperature
WO2014120025A1 (en) 2013-01-31 2014-08-07 Nuenz Limited A high temperature reactor and method of producing nanostructures
EP3839080A1 (en) * 2019-12-17 2021-06-23 ImerTech SAS Kiln support kits and parts of kits for deformation and breakage free high temperature treatment of products, and use thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3127154A (en) * 1964-03-31 Furnace construction
US1234786A (en) * 1916-07-26 1917-07-31 Willard R Miles Door-fastener for box-car side doors.
US1342041A (en) * 1919-09-20 1920-06-01 Richard C Drinker Furnace floor-bar
US1641186A (en) * 1926-04-22 1927-09-06 American Dressler Tunnel Kilns Kiln car
GB492717A (en) * 1937-03-24 1938-09-26 Gibbons Brothers Ltd Improvements in mechanism for feeding goods through furnaces
DE861977C (de) * 1943-05-30 1953-01-08 Siemens Ag Schubplatte fuer Kleintunneloefen oder Stossoefen
DE858966C (de) * 1948-12-02 1952-12-11 Siemens Ag Transporteinrichtung zur Bewegung von Platten, Pfannen, Koerben u. dgl.
FR2180221A6 (en) * 1972-04-13 1973-11-23 Chronberg Sten High capacity ceramics kiln - has floor moving on heat expansion compensating continuous lines of balls in parallel tracks
FR2135711A5 (en) * 1971-04-26 1972-12-22 Sten Chronberg High capacity ceramics kiln - has floor moving on heat expansion compensating continuous lines of balls in parallel tracks

Also Published As

Publication number Publication date
DE2861376D1 (en) 1982-01-28
FR2409475A1 (fr) 1979-06-15
IT1162115B (it) 1987-03-18
EP0002052A1 (fr) 1979-05-30
IT7846910A0 (it) 1978-11-22
US4243378A (en) 1981-01-06
FR2409475B1 (it) 1980-06-20

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