WAGON FOR TRANSPORTING PRODUCTS IN OVENS

Abstract

The invention relates to a product transport wagon for use in a furnace, comprising a chassis equipped with wheels and supporting an upper part configured as a product receiving platform. It includes retaining elements (11) for refractory concrete beams (14) above the chassis, the beams (14) being parallel to each other and to the principal plane of the chassis and receiving refractory concrete slabs constituting the product receiving platform. At least one peripheral refractory concrete beam (15) defining one side of the wagon has at least one face (25) of a geometric shape (27, 28) adapted to provide at least one removable connection with at least one face (25) of a complementary shape (28, 27) of a peripheral refractory concrete beam (15) defining one side of at least one other wagon. Figure to be published with the abstract: Fig. 6

Description

Description Title of the invention: PRODUCT TRANSPORT WAGON IN OVENS

[0001] = The invention relates to a wagon for transporting products in furnaces. Such a wagon is used for transporting products in high-temperature ovens, either generally ovens adapted to cook products at temperatures above 250°C and capable of reaching over 2000°C. Such furnaces are used in industry ceramics, glass, mining, chemical, metallurgical, for surface treatment or more generally, to cook products at such high temperatures. We can imagine that, these ovens being of an industrial type, they have dimensions and a cooking capacity important, this in order to cook several tons of products or products of several meters simultaneously. Wagons are devices for transporting goods allowing them to be inserted into and removed from such ovens. They consist of two parts: a lower, metallic part, equipped with ground-movement devices of the type wheel and an upper part, usually in the form of a flat plate, made of a material Refractory and insulating. The products rest, whether during transport or during the baking in the oven, on the upper part. The current wagons, in addition to a- The relatively rapid gradation of the lower and upper parts is a source significant thermal accumulation and thermal inertia, due to the mass important refractory materials used to make the upper part of the wagons. In other words, the very design of current wagons leads to a significant energy consumption in the oven, a large amount of energy being absorbed by the wagon to the detriment of the product, which impacts the quality of the cooking products and generates an increase in oven operating costs. We know by FR-A-2 976 543 a wagon whose lower part offers better support by a construction by interlocking plates. GB-A-2 063 801 describes a wagon with a improved thermal inertia thanks to an upper section comprising rollers of ceramics held spaced above a plate, the load resting on the rollers. EP-A-65 600 discloses a railcar with a spacing layer between the two parts, to facilitate the circulation of gases and heat. EP-A-1 136 779 described a wagon with ceramic fiber fabrics as insulation. These solutions known methods do not allow for obtaining a wagon with a low thermal impact. by having such resistance that it suffers little degradation during passages successive in an oven.

[0002] — It is these needs that the invention aims to meet by offering a wagon, suitable for transporting heavy and / or bulky products and capable of withstanding temperatures encountered in such an oven, without the wagon being affected by said temperatures and without the wagon itself affecting the cooking of the products it transports and / or influencing energy costs, while being able to undergo several passes in the oven without this significantly affecting its structure and / or characteristics. To this end, the invention relates to a wagon for transporting products in a furnace comprising a lower part or chassis equipped with wheels and supporting an upper part configured as a product receiving platform, characterized in that it includes elements for retaining refractory concrete beams above the chassis, the beams being parallel to each other and to the main plane of the chassis and receiving refractory concrete plates constituting the product receiving platform and in that at least one peripheral refractory concrete beam defining one of the sides of the wagon has at least one face of a geometric shape adapted to make at least one removable connection with at least one face of a complementary shape of a peripheral refractory concrete beam defining one of the sides of at least one other wagon. Thus, thanks to the invention, we have a wagon which, in addition to its simple design, optimizes the number of components and the wagon's geometric configuration, all while limiting its weight. By reducing the refractory mass through the use of concrete, the wagon's thermal inertia is decreased, thereby lowering energy consumption and shortening the heating time. The ability to connect the wagons together saves space and thus optimizes the furnace loading. The use of concrete ensures optimal strength and longevity of the wagons. According to advantageous but not mandatory aspects of the invention, such a wagon may include one or more of the following features: The chassis comprises parallel metal beams equipped with wheels, parallel metal girders are placed perpendicularly on the metal beams and support flat metal sheets defining a receiving plane for the upper part, the chassis being surrounded by metal sides. Support devices are regularly placed in parallel rows on the flat plates defining the receiving plane of the upper part of the wagon. The retaining devices comprise parallel walls, connected to each other, one of the walls being fixed perpendicularly to the flat sheets, the other wall being parallel to the flat sheets. Refractory concrete beams are provided on one face with a longitudinal groove of shape and dimensions adapted to receive one face of the retaining elements when the refractory concrete beams are placed on the elements of maintenance. The face of each refractory concrete beam opposite the one with the longitudinal groove has two parallel longitudinal rebates. At least one refractory concrete slab rests on the rebates opposite two parallel refractory concrete beams. At least one refractory concrete plate rests on part of the face of a refractory concrete beam equipped with rebates, between the rebates. A refractory material is placed between the refractory concrete beams, under the refractory concrete slabs connecting the refractory concrete beams. The peripheral refractory concrete beams include on at least one face a longitudinal groove and relief of complementary cross sections. The peripheral corner beams in refractory concrete comprise two perpendicular faces provided with longitudinal grooves and reliefs of complementary cross sections. Cordierite rests on the rebates opposite two parallel refractory concrete beams. Cordierite is placed on part of the face of a beam fitted with rebates, between the rebates. The cross-section of peripheral beams is adapted to cooperate with reliefs of complementary shapes and dimensions provided on at least one internal face of a furnace wall. The invention will be better understood and other advantages thereof will become more apparent upon reading the following description, given solely by way of non-limiting example and with reference to the accompanying drawings in which: [Fig.1] is a perspective view of a wagon conforming to an embodiment of the invention as it appears at the entrance or exit of a kiln, with brick-type products being loaded onto the wagon, [Fig.2] is a perspective view, at a different scale, of the lower part or chassis, without the part of the chassis receiving the retaining elements. [Fig.3] is a view similar to [Fig.2], with the part receiving the retaining elements in place. [Fig.4] is a view similar to [Fig.3], with the retaining elements in position on the chassis. [Fig. 5] is a perspective view, at the same scale, of the wagon in [Fig. 1] without the products. [Fig.6] is a partial, larger-scale perspective view of part of the wagon without the products, without the concrete slabs forming the product receiving platform, and without one of the beams forming one side of the wagon. [Fig.7] is a similar view and at the same scale as [Fig.6], illustrating the beams forming the sides of the wagon, [Fig.8] is a partial perspective view, at a different scale, of part of a wagon without the products and without one of the sides, the concrete slabs constituting the product receiving platform being illustrated, [Fig.9] is a view similar to [Fig.8], at a different scale, according to another embodiment of the invention, [Fig. 10] is a side view, at another scale, of a wagon according to the invention, with products, in position in an oven and [Fig.11] is a larger scale and partial side view of two wagons receiving products and connected to each other by two of their sides of complementary shapes. Figure 1 illustrates a railcar 1 conforming to one embodiment of the invention. Bricks 2 are stacked in several spaced rows on the upper part 3, which defines a loading platform. The upper part 3 rests on a lower part 4, or chassis. Here, the products 2 are bricks made of a refractory material, that is to say, by definition, a material capable of being regularly exposed to temperatures exceeding 538°C (1000°F) according to ASTM C71, without sustaining damage or altering its characteristics. Currently, there are refractory materials that can be used at temperatures approaching 2000°C. The railcar 1 is adapted to receive other products, known per se, besides bricks 2, provided that these products must undergo treatment or firing in a high-temperature kiln.Thus, these can be products found in the ceramics, glass, metals, mining, chemical, agricultural, or other industries. Such a wagon 1 has dimensions adapted for easy insertion into and removal from an industrial furnace, regardless of the type of furnace or its heating method (electric, gas, or other). The dimensions of a wagon 1, generally parallelogram-shaped, rectangular, or square, can range from 0.5 m by 0.5 m up to 8 m by 8 m. Such wagons generally travel on a dedicated track, such as rails. Alternatively, they can move on any surface and / or be equipped with lifting and / or transport equipment. Figure 2 illustrates the lower part 4 of the wagon. Hereafter, the term chassis will also be used to refer to the lower part 4. The chassis 4 consists of beams 5, made of metal or a metal-based composite material. The beams 5, also referred to as rails, have an H, I, U with a flat bottom, or other known cross-section. These rails 5 receive wheels 6, also made of metal or a metal-based composite material. The wheels 6 are integrated into the rails 5 so that their axes of rotation are perpendicular to the The rail length is 5. The number of wheels 6 evenly arranged in each rail 5 is adapted to the length of the rails 5 and the load to be transported. The rails 5 are arranged parallel to each other. Their number and dimensions are adapted to the type and weight of the load received on the wagon 1. Beams 7, also configured as H, I, or other beams, are arranged perpendicularly on the beams 5. The beams 7 are regularly spaced and parallel to each other. This creates an openwork frame 4 composed of elongated elements 5 and 7, parallel between elements of the same type and perpendicular between elements of different types. The sides 8 of the frame 1 are formed by metal plates, frequently called skirts, which limit any air circulation under the frame 4 and prevent foreign objects from passing under the frame 4 that could hinder the rotation of the wheels 6 and therefore the movement of the wagon 1. The rails 5 and beams 7 are structurally reinforced by spacers 9, which are either metallic or made of a metal-based composite material. The assembly is bolted, welded, or screwed together using methods known per se. As shown in [Fig. 3], flat metal or metal-based composite plates 10 are arranged on the beams 7. These plates 10, here configured as rectangular plates, have a thickness ranging from 2 mm to 10 mm. Alternatively, their number, shape, and / or dimensions may differ from those illustrated in [Fig. 3]. For example, the plates 10 positioned centrally on the spacers 9 are spot-welded together, but they are not welded to the edge of the frame 4. Thus, during temperature rise, the plates 10 can expand freely without deforming.To achieve this, a peripheral clearance of approximately 20 mm to 70 mm wide is provided between the plates 10 and the sides 9 of the frame 4. The assembled plates 10 define a substantially horizontal plane P for receiving the upper part 3 of the wagon 1, even when the wagon 1 is in an oven. Alternatively, the lateral edges of some plates 10 are spot-welded to the sides 9 of the frame 4, with the central plates 10 not connected to each other but spaced apart with expansion joints. In all cases, as shown in [Fig.3], a chassis 4 is constructed whose upper and flat part P limits the height of the chassis 4. Such a height corresponds roughly to the height defined by the beams 7 placed above the rails 5. Thus, we gain usable height on a wagon 1, which allows more products to be placed on the wagon 1 before its introduction into a furnace. Figure 4 schematically illustrates the retaining elements 11, also preferably called studs, which are arranged on the plates 10. The studs 11 provide the connection between the metallic frame 4 and the non-metallic upper part 3 of the wagon 1. By definition, the frame 4 ensures the structural cohesion and movement of the wagon 1, while part 3 receives products 2. The blocks 11 are arranged in regularly spaced parallel rows, with the blocks 11 in each row also being regularly spaced. This configuration allows for identical and parallel rows in both length and width of the wagon. As shown in [Fig. 4], the blocks 11 are generally rectangular in shape. Alternatively, they can be of another shape, for example, a square. A rectangular parallelepiped-shaped volume is defined between parallel walls 12, made of metal or a metal-based composite material. The walls 12 are L-shaped. The longer arms of the walls 12 are parallel to each other and fixed to the plates 10, extending outwards from the frame 1 in a direction perpendicular to plane P. The shorter arms of the walls 12 are coplanar in a plane parallel to plane P and extend outwards from the block 11. The blocks 11 all have identical dimensions. A refractory material, advantageously refractory concrete or, alternatively, bricks or fibers, is placed within the volume defined by the walls 12.In addition to maintaining the parallel walls 12 during the temperature rise, the pads 11 are stiffened and a thermal break is created between the metal sheets 10 of the frame 4 and the upper part 3 on which the products 2 will be placed. It is easy to understand that the height and / or length and / or width of the refractory materials located in the pads 11, and therefore overall the geometry and number of the pads 11, are variable and adapted according to the wagon 1 and / or the products to be supported. Thus, the heavier and / or bulkier the products to be supported, the greater the number and / or size of the pads 11 will be. The height of the pads 1 is adapted to ensure thermal insulation between the frame 4 itself and the upper part 3 receiving the products 2. Figure 5 shows the finished upper section 3, ready to receive products 2. It is noted that concrete slabs 13 define a flat surface S for receiving products 2. Surface S is parallel to the plane P of the frame 4. These concrete slabs 13 are regularly spaced and kept parallel to each other and parallel to the plane P of the frame 4. To achieve this, the slabs 13 are partially supported by rows of concrete beams 14. Here, the term "concrete" refers to concrete adapted to withstand high temperatures. Such concrete, called refractory concrete, is known in its own right and capable of withstanding temperatures of around 2000 °C. For this purpose, the aggregates used are refractory aggregates, for example, crushed brick, chamotte, corundum, zirconia, calcined gibbsite, sillimanite, alumina, or others. The beams 14 have a specific cross-sectional configuration which will be described later. In [Fig. 5], beams 15, also made of concrete, are also visible around the periphery of wagon 1, directly above the sides 8. Subsequently, these beams 15 Peripheral elements will also be referred to as edges or rims. The edges 15 have a specific cross-section, different in this example from that of the beams 14. The beams 15 will be described in more detail later. Between the beams 14, referred to as central beams, which support the concrete slabs 13, an insulating and / or refractory material, referenced as 16 in [Fig. 5], is arranged so as to occupy all the free space between the beams 14 and the slabs 13. As can be seen particularly in [Fig. 6], which partially illustrates the upper part 3 of wagon 1, the cross-section of the beams 14 is generally square. Alternatively, it may be rectangular. The lower face 17 of the beams 14 is shaped to bear, without risk of slippage, on an upper face 18 of the supports 11. To this end, the flat upper face 18 of the supports 11 is housed in a longitudinal groove 19 of suitable dimensions, formed along the entire length of the face 17 of the concrete beam 14. The respective dimensions of the face 18 of the support 11 and the groove 19 of the face 17 of the beam 14 are complementary, so that the support 11 is housed with minimal play in the groove 19, without friction and without risk of dislodging. On the upper face 20 of the beam 14, opposite face 17, two longitudinal grooves or rebates 21, 22, visible in [Fig. 6], are cut along the entire length of the beam 14. These rebates 21 and 22 are located at the upper corners of the beam 14 and are identical in this example. Alternatively, they may be different. The rebates 21, 22 define bearing areas for the edges of the concrete slabs 13. The portion 23 of face 20 located between the rebates 21, 22 receives a slab 24 made of refractory concrete or another refractory material. These plates 24 allow for continuity between the plates 13 placed on the rebates 21, 22 by ensuring the continuity of the surface S defined by the plates 13 in place on the beams 14. For this, the plates 24 have a suitable thickness corresponding approximately to the thickness of the part of the plates 13 located above the part 23 of the face 20 of the beams 14. Thus the surface S is flat and solid. It is clear from Figures 5 to 11 that the elongated refractory concrete elements, namely the beams 14 and the sides 15, are formed from several joined unit sections. The beams 14 and sides 15 are manufactured, for example by molding or another known technique, in a workshop and with predefined dimensions. This solution, in addition to facilitating and accelerating the construction of the wagon (since only the assembly takes place on site), allows for the production of wagons with different dimensions from elements 14 and 15 of the same dimensions. The use of the same material, namely refractory concrete, for the production of the various constituent elements of part 3 of wagon 1, guarantees optimal and homogeneous quality of the wagon and, above all, ensures low thermal conductivity throughout the wagon. 1}; Figure 7 illustrates the edges 15 assembled to define a corner of part 3 of the wagon. The edges 15, shaped like elongated bars, have different lateral faces. As is particularly visible in Figure 6, the lateral face 26, oriented towards the interior of the wagon and therefore facing the beams 14, is flat and solid in order to bear against the end section of one end of each beam 14. The opposite face 25 is solid and not flat, with a complex shape. The face 25 of each edge 15 is configured to achieve contact through a cooperation of shapes with a face 25 of another edge 15. Here, the term "contact" refers to the fact that two edges 15 are mutually supported by their faces 25, in a non-permanent manner. Such support is sufficient to create a connection between the edges 15, allowing them to be moved as a unit without the need to secure this connection with an additional part.In other words, by contact between the sides 15 of the wagons 1, it is possible to connect a wagon 1 to at least one wagon 1. The wagons thus connected are identical at the level of their sides 15 but can be of different dimensions. It is therefore possible to make a connection on one, two, three or four sides of a wagon 1 as needed, thus connecting one wagon to one, two or three other wagons 1. As can be seen particularly in figures 6 and 7, face 25, therefore the one facing outwards from wagon 1, includes, in the lower part, therefore the part closest to chassis 4, a longitudinal groove 27, with a cross-section generally flat bottom and asymmetrical walls, one being inclined and the other perpendicular to the bottom of groove 27. In the upper part, above groove 27 there is a longitudinal relief 28 also with a cross-section flat bottom and asymmetrical walls. In other words, the cross sections of the groove 27 and the relief 28 are complementary, of the male-female type, with respect to a longitudinal axis of the edge 15. Thus, by rotating an edge 15 of a wagon 1 by 180°, we position its groove 27 and its relief 28 opposite, respectively, the groove 27 and the relief 28 of another edge 15 of a wagon 1 which, for its part, has not rotated. In [Fig. 7], a corner edge 29 is illustrated. This corner edge 29 comprises perpendicular faces 30, 31, each provided with a groove 27 and a relief 28. The arrangement of the grooves 27 and reliefs 28 on the faces 30, 31 is staggered: The groove 27 of a face 30 or 31 is at the same level and in line with the relief 29 of the face 31 or 30 of the same corner edge 29. Such a configuration allows a corner edge 29 to extend, at the corners, two edges 15 of the same wagon 1 arranged at right angles. It is understood that, as an alternative, the angles of faces 30 and 31 are not 90°, which allows, with inclined end slices of edges 15 and of angle edge 29, to produce parts 3 which are not rectangular or square, for example in the shape of a rhombus. In [Fig. 8], the concrete slabs 13 rest on the rebates 21, 22 of two parallel beams 14. Together with the slabs 24 (not shown), which are placed on the faces 20 of the beams 14, they define a flat bearing surface for the products 2. In this embodiment, refractory and / or insulating elements 32, such as refractory concrete, are placed between the beams 14 beneath the slabs 13. This ensures homogeneous and continuous thermal insulation between the frame 4 and the upper part 3. Figure 9 illustrates another embodiment of the invention in which cordierite 33 is used instead of the refractory concrete elements 32. Cordierite is an aluminum-magnesium silicate mineral with low thermal conductivity and high-temperature stability. It is a refractory material used in industry as a thermal and electrical insulator. Cordierite 33 is also used, if necessary, in place of the plates 24 placed on the face 20 of the beams 14. Figure 10 is a simplified illustration of a furnace 34 into which a wagon 1 loaded with products 2 is inserted. It should be noted that, thanks to the invention, the height of the wagon 1 is minimal, which allows for high loading. Typically, the products 2 in place on the wagon 1 occupy the entire usable volume of the furnace 34. The construction of the wagon 1, with a limited number of parts and primarily using a refractory material such as refractory concrete, makes it possible to limit energy losses from the wagon 1 as much as possible. It should also be noted that the grooves 27 and the ridges 28 on the sides 15 allow the wagon 1 loaded with products 2 to be guided in translation, by cooperating with ridges 35 and grooves 36 of complementary shapes and dimensions provided on the inner face 37 of the vertical wall 38 of the furnace 34.Such cooperation of shapes between the banks 15 and the wall 38 also makes it possible to secure the loading of wagon 1 by preventing derailment of wagon 1 and by maintaining a constant gap between wagon 1 and the wall 38 of the furnace 34, thus ensuring the circulation of heat all around wagon 1 and its load. Depending on the size of the wagons | and / or the furnace 34, it is possible to introduce several wagons 1 into the same furnace 34, the latter carrying loads of identical or different products 2. In this case, several wagons can be joined or coupled together, allowing them to be moved together. As indicated previously and illustrated in [Fig. 11], when one edge 15 of a first wagon 1 is brought opposite one edge 15 of a second wagon 1, there is a complementary shape between the reliefs 28 and the grooves 27 of the two edges 15, and therefore an interlocking of the reliefs 28 and grooves 27, which allows the wagons 1 to remain coupled according to the length and / or width of the wagons 1. Such an interlocking also allows the frames 4 of the wagons | to be brought into contact with minimal play. In effect, a wagon of large diameter is produced. dimensions, without adding parts and without lengthy and complex maneuvers: simply move the wagons | until they are in contact. Alternatively, safety devices, for example hooks, pins, can be used to secure the configuration of the assembled wagons. Tests have shown that chassis 4, the metal part of wagon 1, heats up less than the metal part of a state-of-the-art wagon, due to its structure. There is less thermal inertia and therefore less energy required. Part 3 is quick and easy to build in the workshop. Indeed, using standardized refractory concrete elements of varying shapes and dimensions, such as beams 14, side rails 15, corner rails 29, and plates 13 and 24, wagons 1 can be assembled on-site in the required number and dimensions. The use of such standardized elements also allows for quick and easy maintenance. The use of refractory concrete significantly reduces the mass of material used to build a wagon, which decreases its thermal inertia and lowers energy consumption. Less energy is used to heat and maintain wagon 1 at the required temperature.Furthermore, refractory concrete offers high resistance, which helps to preserve the structural integrity of wagon 1 for longer.

Claims

Claims

1. Wagon (1) for transporting products (2) in an oven (34) comprising a lower part or chassis (4) equipped with wheels (6) and supporting a upper part (3) configured as a product receiving tray (2), characterized in that it comprises holding members (11) of refractory concrete beams (14) above the frame (4), the beams (14) being parallel to each other and to the main plane (P) of the chassis (4) and receiving refractory concrete plates (13) constituting the tray of reception of the products (2) and in that at least one peripheral beam in refractory concrete (15, 29) defining one of the sides of the wagon (1) has at at least one face (25, 30, 31) of a suitable geometric shape (27, 28) to make at least one removable connection with at least one face (31, 30, 25) of a complementary shape (28, 27) of a peripheral beam in refractory concrete (15, 29) defining one of the sides of at least one other wagon (1).

2. Wagon according to claim 1, characterized in that the chassis (4) consists of parallel metal beams (5) equipped with wheels (6), parallel metal beams (7) are placed perpendicular- loosely on the metal beams (5) and support metal sheets (10) flat metals defining a plane (P) for receiving the su- upper (3), the chassis (4) being surrounded by metal sides (8).

3. Wagon according to claim 2, characterized in that organs of maintenance (11), , are regularly placed in parallel rows on the flat sheets (10) defining the plane (P) for receiving the su- upper (3) of the wagon (1).

4. Wagon according to claim 3, characterized in that the organs of holding (11) comprise parallel walls (12) connected to each other, metallic, one of the walls being fixed perpendicularly to the sheets (10) planes, the other wall being parallel to the plane sheets (10).

5. Wagon according to claim 3, characterized in that beams (14) in refractory concrete are provided on one face (17) with a longitudinal groove- tudinal (19) of shape and dimension adapted to receive a face (18) holding members (11) when the concrete beams (14) re- fracture are placed on the holding organs (11).

6. Wagon according to claim 5, characterized in that the face (20) of each beam (14) in refractory concrete opposite that (17) provided with the longitudinal groove (19) is provided with two longitudinal grooves parallel tudinales (21, 22).

7. Wagon according to claim 6, characterized in that at least one plate (13) in refractory concrete rests on the grooves (21, 22) in view of two parallel refractory concrete beams (14).

8. Wagon according to claim 6, characterized in that at least one plate 24) in refractory concrete rests on a part (23) of the face (20) of a beam (14) made of refractory concrete equipped with grooves (21, 22), between the rebates.

9. Wagon according to claim 8, characterized in that at least one refractory material (16) is placed between the beams (14) made of re- concrete fractories, under the refractory concrete plates (13) connecting the beams {14) in refractory concrete.

10. | Wagon according to claim 1, characterized in that the peri- spherical (15) in refractory concrete comprise on at least one face (25) a groove (27) and a relief (28) longitudinal of trans- sections complementary versales.

11. | Wagon according to claim 1, characterized in that the peri- angle sphericals (29) made of refractory concrete comprise two faces (30, 31) perpendicular provided with grooves (27) and reliefs (28) longitudinal- tudinals of complementary cross sections.

12. Wagon according to claim 6, characterized in that cordierite rests on the grooves (21, 22) opposite two concrete beams (14) parallel refractory.

13. Wagon according to claim 6, characterized in that cordierite is placed on a part (23) of the face (20) of a beam (14) equipped with the rebates (21, 22), between the rebates.

14. | Wagon according to claim 1, characterized in that the section transverse of peripheral beams (15) is adapted to cooperate with reliefs (35, 36) of complementary shapes and dimensions arranged on at least one internal face (37) of a wall (38) of an oven (34).

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