DE102017107492A1 - Furnace frame, in particular shaft furnace frame, for charging a furnace installation with heat treatment material - Google Patents

Abstract

The invention relates to a furnace frame, in particular shaft furnace frame, for charging a furnace plant with a heat treatment material, with at least one load-bearing vertical support and arranged on the vertical support horizontal beam. In order to provide a furnace frame, in particular a shaft furnace frame, which offers the possibility to accommodate even large components, it is provided that the horizontal support, for receiving a central support 2 formed as a vertical carrier centrally disposed central opening and for receiving at least two edge carriers formed as vertical beams at least two Having in the peripheral region of the horizontal support arranged edge openings.

Description

• - einem lastaufnehmenden Vertikalträger und
• - einem an dem Vertikalträger angeordneten Horizontalträger.

The invention relates to a furnace frame, in particular shaft furnace frame, for charging a furnace with a heat treatment, with

• - A load-bearing vertical beam and
• - One arranged on the vertical support horizontal beam.

Furnace racks, in particular shaft ovens of the type mentioned above, which are structurally adapted to the shaft furnaces provided for the heat treatment, are used to accommodate components, such as gear parts, which are to be subjected to a heat treatment.

The horizontal beams are connected to the vertical support and provide a receiving surface for the heat treated. The equipped with components furnace frame, formed of at least one vertical support and a horizontal beam, which provides a bearing surface for the heat treated, then by an attaching to the vertical support lifting unit in be moved in its entirety in the furnace intended for the heat treatment and taken out again after the heat treatment. In the case of the formation of the furnace frame as a shaft furnace frame, the vertical support for this purpose usually a connection option for a suspended transport of the shaft furnace frame, so that the frame, for example, can be moved over a suitable crane device and raised and lowered.

Due to the constant use of the oven racks, these themselves are subject to considerable mechanical and thermal stresses, which lead to the horizontal carriers being subject to considerable wear with increasing service life, which ultimately can lead to irreparable damage to the horizontal carriers. In addition, due to a usually centrally arranged vertical beam has the problem that the arranged around the vertical support receiving surface on the horizontal support is often not sufficient to position larger heat treatment material on the shaft furnace rack.

In principle, it is known to arrange a plurality of horizontal beams one above the other, which on account of their spacing makes it possible to arrange a larger number of heat-treated goods on a frame. In this case too, however, a central vertical support constitutes an obstacle, which in particular prevents it from placing large-area heat-treated material on the horizontal support.

The invention has for its object to provide a furnace rack, in particular a shaft furnace rack, which offers the possibility to accommodate even large components.

The invention solves the problem by a furnace rack with the features of claim 1. Advantageous developments of the invention are specified in the dependent claims.

Characteristic of the oven rack according to the invention is that the horizontal support for receiving a central carrier designed as a vertical support centered central opening and for receiving at least two edge carriers formed as vertical supports at least two arranged in the peripheral region of the horizontal support edge openings.

The central opening is usually an opening which penetrates the horizontal support in the middle and which is designed to receive the vertical support formed as a central support. As a basic carrier of the horizontal support is thereby pushed in the mounted state on the vertical support to a receiving portion of the vertical support, wherein the receiving portion is adapted to the central opening, that the horizontal support is fixed in the longitudinal axis direction in the region of the receiving portion on the vertical support.

In addition to the central opening, the horizontal carrier moreover has in the region of its circumference at least two edge openings which are provided for receiving vertical supports formed as edge carriers. Also, the edge support usually have in the region of one end a receiving portion on which the horizontal support is determined as a basic carrier in the axial direction. The edge beams extend through the edge openings of the horizontal beam. The edge openings are preferably arranged on the outer circumference of the horizontal support, so that in the area between the edge supports a free surface is formed, which is not interrupted by a central support. The number of edge openings for receiving the edge support and their arrangement on the horizontal support, for example. Detachably or integrally formed with the horizontal support is basically arbitrary, preferably four or more edge openings are evenly distributed over the circumference arranged on the horizontal support.

The inventive design of the oven frame with a horizontal support, which can be combined to form a furnace frame both with a central vertical support and with edge arranged central supports, allows the furnace frame in an optimal manner to the intended for heat treatment Good adapt. In particular, the use of the edge opening allows the provision of a support surface, which is not interrupted by a central support, so that even large-scale goods can be supplied to the furnace frame of the heat treatment.

An essential feature of both the central opening and the edge opening is that they are designed such that the horizontal support forming the base support is fixed to a receiving portion of the central support or the edge support in the longitudinal axis direction of the vertical support. Usually, the receiving portion is arranged on the vertical support in the region of its end, so that the horizontal support in the mounted position is preferably flush with the end of the vertical support, so that the furnace frame can be parked on the base support. In addition, caused by the heat-treated components, acting on the horizontal support forces are reliably transmitted to the vertical support.

The orientation of horizontal carrier and vertical carrier to each other is such that extends in the position of use of the vertical carrier substantially in the vertical direction and the horizontal carrier in a horizontal direction. The arrangement of the horizontal carrier on a receiving portion of the central carrier and / or edge support a variable oven rack is formed that can be transported by an attacking the vertical carrier lifting device. Based on the operating position, the oven frame according to the invention can be raised and transported, for example, by a lifting device acting on the lower end of the vertical carrier or a crane device acting on the upper end of the vertical carrier.

The design of the receiving portions of central support or edge support is basically basically, as well as the design of the corresponding edge openings or central opening basically freely selectable. According to a particularly advantageous embodiment of the invention, however, the central carrier has a receiving portion with projections and the central opening adapted to the projections recesses.

According to this embodiment of the invention, a reliable power transmission is ensured by the horizontal support on the central support on the projections and the recesses. The projecting from a peripheral surface of the central support projections in the region of the receiving portion, which engage with corresponding recesses at the central opening, in addition to a good load transfer from the horizontal support on the central support also ensure a reliable position assurance.

In principle, the number of projections and the corresponding recesses can be freely selected. According to a particularly advantageous embodiment, however, it is provided that the vertical support in the region of the receiving portion has a plurality of projections which are particularly preferably arranged symmetrically distributed on the peripheral surface of the central support. The use of several projections allows a good load distribution and also makes it possible to make the projections smaller with increased load-bearing capacity. In addition, the connection of central support and central opening via projections and recesses provides the production of a rotationally secure connection between the vertical support and the horizontal support, which exact positioning of the material to be heat treated would allow the heat treatment process, after a rotation of the horizontal support relative to the vertical support is prevented. When using at least two edge beams can be dispensed with an anti-rotation, after which it is already effected by the edge carrier arranged on the outside. Thus, the receiving portion is interpreted only in terms of an axial position assurance, although in addition with a corresponding configuration of the edge openings and projections can be provided.

To increase the loading capacity of the furnace rack is provided according to a further embodiment of the invention, that a further horizontal carrier in the longitudinal axis direction of the vertical support at a distance from the carrier forming the horizontal carrier is arranged, wherein in the region between the horizontal carriers on the vertical support at least one of the horizontal carrier spaced coaxially arranged Spacer sleeve is arranged.

The use of spacers allows the arrangement of a plurality of horizontal beams one above the other, wherein these - are arranged in each case above the first horizontal support, which forms the base support - with respect to the position of use. The spacing of one or more further horizontal carriers is effected via coaxial with the vertical carrier, ie coaxial with the central carrier or coaxial with the edge carriers arranged spacers. The spacer sleeve rests with its peripheral end faces on the spaced horizontal supports, wherein in the case of using a plurality of spacers, these abut each other in the region between the horizontal support. On the use of multiple spacers can thus be adjusted in a simple manner, the distance of the horizontal support, which reliably on the spacers the force on the or the vertical support transfer. On the use of different and / or more spacers thus the oven frame can be adapted to the particular application in a particularly simple manner.

The design of the spacers is basically freely selectable. In its simplest embodiment, the spacers are designed in the manner of a tube with flat faces. According to a particularly advantageous embodiment of the invention, however, it is provided that the central carrier can be arranged at the central carrier spacer sleeve is designed as a spacer sleeve, the two ends is suitable for torsion-proof connection with the central opening or the central carrier spacer sleeve is formed as an intermediate sleeve, the two ends for torsion-proof connection a spacer sleeve is suitable or the central carrier spacer sleeve is designed as an adapter sleeve, which is formed at one end for a rotationally secure connection with a spacer sleeve and at the other end for a rotationally secure connection to the central opening.

According to this embodiment of the invention, the central carrier spacer sleeve may have three different configurations. In its embodiment as a spacer sleeve, these two ends is designed for a rotationally secure connection with the central opening. In the case of the embodiment of the central opening with a recess, the spacer sleeve can, for example, have projections which can be brought into engagement with the recesses, which makes it possible to transmit an anti-rotation of the base support via the spacer sleeve to a horizontal support arranged above the base support. As an intermediate sleeve, the central carrier spacer sleeve on an education that allows both ends a twist-proof connection with the spacer sleeve described above. The intermediate sleeve is thus suitable for being arranged between two spacer sleeves in order in turn to connect these against rotation with one another.

In the case of the configuration of the spacer sleeve with projections arranged on both end faces, the intermediate sleeve can, for example, be provided with recesses corresponding to the projections on both end faces. The embodiment of the intermediate sleeve with recesses also makes it possible according to a development of the invention to arrange releasable locking cams in the recesses, which then fulfill the function of protrusions. The intermediate sleeve with recesses can thus be easily transformed into a spacer or adapter sleeve, wherein the locking cams, for example, can be arranged in the recesses via a dovetail-like connection. The use of locking cams thus increases the variability of the intermediate sleeve with arranged on one or both end faces recesses.

In a further embodiment, the central carrier spacer sleeve is designed as an adapter sleeve, wherein it is formed at one end for a rotationally secure connection with a spacer sleeve and at the other end for a rotationally secure connection to the central opening. According to this embodiment of the invention can be prepared by the use of a spacer sleeve and one or more adapter sleeves in a simple manner a twist-proof connection between the stacked horizontal carriers. In the case of using a spacer sleeve with both sides projecting cams, the adapter sleeve, for example, on the one hand with one or more projections and on the other hand provided with corresponding projections projections recesses, so as to produce a rotationally secure connection between the sleeves and the sleeves associated with the horizontal carriers ,

Overall, the different design options of the central carrier spacer sleeve offer the possibility of individually adapting the oven frame to the needs. About an example. Of several different sleeves and possibly locking cam existing kit so the oven rack can be adapted exactly to the purpose, with a reliable anti-rotation is achieved over the sleeves.

The spacers for spacing the horizontal beams in the case of the use of edge beams may be formed as a simple cylindrical body with flat end faces, after already by the use of at least two edge beams, which are connected to the horizontal beams, an anti-rotation is achieved, which arranged on the edge beams Sleeves can thus be designed solely for the horizontal spacing of the horizontal beams.

The configuration of the central opening, for example, the arrangement of the recess is basically arbitrary. According to a particularly advantageous embodiment of the invention, however, it is provided that the recesses of the central openings are arranged distributed at a distance of 60 ° on the inside of the central opening, the sleeve both ends two diametrically arranged, adapted to the recesses projections and the adapter sleeve one end two diametrically arranged and at the other end at a distance of 60 ° or 90 ° circumferentially distributed recess.

This configuration of the central opening, the spacer sleeve and the adapter sleeve makes it possible to stack one above the other Horizontal support in angular increments of 30 ° to each other set. As a result, there is the possibility of an optimal alignment of the horizontal support to each other, which may be provided, for example, with different sections for receiving the heat treatment material, so that by the optimal alignment of the horizontal support each other a uniform heat distribution of the heat treated can be achieved.

The design of the horizontal carrier, which is usually provided for receiving attachable to the horizontal beams support grids, is basically arbitrary. According to a particularly advantageous embodiment of the invention, however, it is provided that the horizontal support has at least two support arms, preferably at least three support arms, more preferably six support arms, which each have an edge opening at their free ends.

According to this embodiment of the invention, the horizontal support star-like from the central opening outgoing support arms on which the support grids can be arranged, wherein at the ends of the support arms edge openings are provided for receiving the edge support. This embodiment of the invention enables a simple and inexpensive embodiment of the horizontal beam with arranged at the free ends edge openings. Moreover, the arrangement of the edge opening at the ends of the support arms ensures good power transmission between the stacked horizontal beams. The support arms form a support cross and allow the application-specific arrangement of can be arranged between the support arms supporting grates. The support grids, which, for example, have a latticed support structure, thereby allow a good drainage of liquids, for example. Oils, which can be used after the heat treatment for setting suitable structure of the heat-treated components. In addition, the weight of the horizontal beam can be reduced by the use of the supporting grates. According to a particularly advantageous embodiment of the invention, the support arms are aligned symmetrically, whereby a uniform force transmission is ensured.

In the case of using the horizontal support for receiving supporting grates, the support arms can in principle be configured in any way for receiving the supporting grates. According to a particularly advantageous embodiment, however, it is provided that the support arms in the circumferential direction have projecting cams, which are designed to receive support grids between the support arms.

This embodiment of the invention enables a simple and reliable arrangement of the support grids on the support arms, wherein the protruding from the support arms in the circumferential direction cam, for example. With arranged on the support grids recesses can engage. The cam-recess connection ensures a high positional security of the support grids on the support arms, at the same time a simple replacement of the support grates can take place, if desired.

As an alternative to the configuration of the horizontal beams with detachable supporting grates, according to a development of the invention, it is provided that the supporting grates are formed integrally with the horizontal beam. This embodiment of the invention makes it possible to use the entire area arranged by the horizontal support and between the horizontal beams to form a homogeneous support structure. In addition, a continuous surface provides a constant load distribution, whereby the load transfer can be dispensed with connection points between support grid and support arm.

The design of the support grates and / or the integrally formed with the support rails horizontal support is, as already stated above, basically freely selectable and can be configured according to the load and field of application of the furnace frame. According to a further embodiment of the invention, however, it is provided that the support grates and / or the horizontal support formed integrally with the support grids has a honeycomb structure and / or a branched jet-shaped design.

In the case of using a honeycomb structure, the honeycomb may be formed such that they have identical side lengths and regularly distributed together form a support grid. Alternatively, the honeycomb structure can also be designed in the manner of a "bionic" design, wherein the honeycombs can have different side lengths and / or the sides of a honeycomb include different angles. The design of the supporting grates or the entire horizontal carrier with a corresponding honeycomb structure is characterized by the fact that at a low weight, a high load capacity is given.

An alternative design of the support grids or the entire horizontal receiving surface formed from supporting grates and horizontal support provides for the use of a branched jet-shaped design, starting from the central opening in the radial direction, starting from a wide base web branching off two intermediate webs, which in turn branched two again in the radial direction Have end webs. The free ends of the end webs can then over at their circumference Intermediate webs are connected to each other, wherein further intermediate webs can provide additional support of the individual webs in the radial direction. This embodiment is characterized by its low weight and high capacity.

According to a further embodiment of the invention, it is provided that the spacer sleeve for coupling two horizontal carriers is designed such that the horizontal carrier abut each other in the arrangement taking place via the spacer sleeve. According to this embodiment of the invention, two horizontal supports are rotationally coupled together via the spacer sleeve. Furthermore, the fact that the horizontal beams abut each other in the vertical direction and the carrying capacity of the receiving surface is increased, after the bending stiffness of the horizontal beam is increased in total over the caused by the spacer sleeve coupling the horizontal support to each other.

• 1 eine perspektivische Ansicht eines Schachtofengestells mit einem Zentralträger und daran angeordneten Horizontalträgern;
• 2 eine perspektivische Ansicht des obersten Horizontalträgers von 1;
• 3 eine perspektivische Ansicht des mittleren Horizontalträgers von 1;
• 4 eine perspektivische Ansicht des untersten, einstückig mit Tragrosten ausgebildeten Horizontalträgers,
• 5 eine perspektivische Ansicht des mittleren Horizontalträgers mit einem daran angeordneten Tragrost;
• 6 eine perspektivische Ansicht eines am mittleren Horizontalträger angeordneten Tragrost;
• 7 eine perspektivische Ansicht eines am oberen Horizontalträger angeordneten Tragrost;
• 8 eine perspektivische Ansicht einer als Abstandhülse ausgebildeten Zentralträger-distanzhülse;
• 9 eine perspektivische Ansicht einer als Adapterhülse ausgebildeten Zentralträger-distanzhülse und
• 10 eine perspektivische Ansicht eines als Zentralträger ausgebildeten Vertikalträgers mit Aufnahmeabschnitt und Hebekeil.

An embodiment of the invention will be explained below with reference to the drawings. In the drawings show

• 1 a perspective view of a shaft furnace frame with a central support and disposed thereon horizontal beams;
• 2 a perspective view of the top horizontal support of 1 ;
• 3 a perspective view of the middle horizontal support of 1 ;
• 4 a perspective view of the bottom, integrally formed with support rails horizontal carrier,
• 5 a perspective view of the central horizontal support with a support grid disposed thereon;
• 6 a perspective view of a arranged on the central horizontal support grid;
• 7 a perspective view of a arranged on the upper horizontal beam support grid;
• 8th a perspective view of a trained as a spacer central carrier spacer sleeve;
• 9 a perspective view of a formed as an adapter sleeve central carrier spacer sleeve and
• 10 a perspective view of a trained as a central carrier vertical carrier with receiving portion and lifting wedge.

In 1 is a shaft furnace frame 1 trained furnace rack shown in a perspective view. The shaft furnace frame 1 has one as a central carrier 2 trained vertical support, which is formed by a central support rod. The central carrier 2 serves in the present case for receiving a total of three horizontal beams 3a . 3b . 3c , which in turn serve to accommodate not shown here, heat-treated components.

To transport the shaft furnace frame 1 By means of a lifting device not shown here, the central carrier 2an at its upper end a lifting wedge 8th on top of itself by one the central carrier 2 piercing opening 7 extends and which is provided for the arrangement of a load receiving device, for example. A chain or a crane hook of a suitable crane device. The shaft furnace frame equipped with the heat-treated components 1 can thus be, for example, by means of the crane device on the lifting wedge 8th lift and transport in a shaft furnace, not shown here, or remove it from the heat treatment after further treatment. (see. 10 )

The upper and middle horizontal beam 3a . 3b each have a by support arms 11a . 11b formed Tragkreuz on. The support arms 11a . 11b extend in the radial direction symmetrically starting from a central region 20 , At the free ends of the support arms 11a . 11b are pods 14a . 14b arranged which edge openings 5a . 5b have for receiving not shown edge beams. The edge supports may alternatively or additionally to the central support 2 for the arrangement of the horizontal beam 3a . 3b . 3c be used, with the edge support through the edge openings 5a . 5b . 5c extend. (see. 2 and 3 )

In the area between the support arms 11a . 11b are supporting grates 19a . 19b detachable on the horizontal supports 3a . 3b arranged. The supporting grates 19a . 19b lie on cams 18 on, those of the carrying arms 11a . 11b protrude in the area between them in the circumferential direction. The supporting grates 19a . 19b have a honeycomb-shaped lattice structure, wherein the upper horizontal support 3a arranged supporting grates 19a have a non-uniform honeycomb structure, whereas those on the horizontal beam 3b arranged supporting grates 19b have a regular honeycomb structure. The regular honeycomb structure has substantially constant large webs 26 on, whereas the webs 26 of the irregular honeycomb structure differ from each other (cf. 5 - 7 ).

The horizontal beam 3a has support arms 11a on, which are spaced apart, in pairs radially from the central area 20 extending longitudinal webs 12 are formed, wherein the longitudinal webs 12 over crossbars 13 connected to each other. The design of the carrying arms 11a allows the crossbars 13 to use to a heat treatment goods on the support arms 11a hang, in which case on the arrangement of supporting grates 19a . 19b can be waived.

In contrast, the support arms 11b of the horizontal carrier 3b formed by simple longitudinal webs, extending from the central area 20 of the horizontal carrier 3b extend in the radial direction. Cams arranged on the longitudinal webs 18 also serve to accommodate the supporting grates 19a . 19b ,

The horizontal beams 3a . 3b . 3c point to their coaxial arrangement on the central support 2 one central opening each 4a . 4b . 4c on. Over an inner surface of the central opening 4a . 4b . 4c the horizontal beams are supported 3a . 3b . 3c each on the peripheral surface of the central support 2 from. The central openings 4a . 4b . 4c also have on both sides, ie, starting from their top and bottom underside extending recesses 10a . 10b . 10c on, which are limited in the longitudinal axis direction by a stop surface.

The design of the central opening 4a . 4b . 4c allows it, every horizontal beam 3a . 3b . 3c in the basic position on a correspondingly formed receiving section 6 of the central carrier 2 to arrange. In the basic position in which the recess 10a . 10b . 10c in protrusions 9 at the receiving portion 6 engage, forms the arranged there horizontal carrier 3a . 3b . 3c a base support over which the axial on the horizontal beam 3a . 3b . 3c acting loads on the central carrier 2 be transmitted.

The at the bottom of the central carrier 2 arranged receiving section 6 has protruding cams from a surface 9 on, which conform to the shape of the recesses 10a . 10b . 10c are adjusted. For the arrangement of a horizontal carrier 3a . 3b . 3c at the receiving portion 6 becomes the horizontal carrier 4c before applying the lifting wedge 8th first with the central opening 4c on the central carrier 2 put on and along the central carrier 2 in Aufschieberichtung, ie from the upper end in the direction of the receiving portion 6 moved up to this, where the recesses 10c with the cams 9 engage.

The cams 9 and the recesses 10c form in their engaged position on the receiving portion 6 an acting in the longitudinal axis direction and in the circumferential direction of the central carrier form closure. The symmetrical design of the central opening 4a . 4b . 4c allows the two-sided arrangement of the horizontal beam 3a . 3b . 3c ,

In the in 1 illustrated embodiment is a horizontal beam 3b over spacers 15a . 15b relative to the horizontal support forming the base support 3c spaced. The spacers 15a . 15b are between the mutually facing surfaces of the arranged in the basic position horizontal carrier 3c and the horizontal support arranged above 3b arranged and lie on opposite upper sides in the central area 20 to the horizontal beam 3b . 3c at. One on the horizontal beam 3b . 3c acting load is thus on the spacer sleeves 15a . 15b on the arranged in the basic position horizontal beam 3c and from this via the recording section 6 on the central carrier 2 transfer.

To prevent rotation of the two horizontal beams 3b . 3c to each other are the spacers 15a . 15b as a spacer sleeve 15a and as an adapter sleeve 15b educated. The spacer sleeve 15b is for twist-proof connection with the central opening 4a . 4b . 4c both ends with two diametrically arranged projections 16 provided, which project from the end faces and into the recess 10a . 10b . 10c intervention. To adjust the distance, the spacer sleeve is further in an additional embodiment as an adapter sleeve 15b formed, this for the rotation-proof recording of the projections 16 the adapter sleeve 15b or spacer sleeve 15a on the one hand at a distance of 90 ° distributed on the circumference arranged recesses 17 having. On the other hand, the adapter sleeve 15b two diametrically arranged projections 16 on. (see. 8th and 9 )

The illustrated shaft furnace frame 1 has as a horizontal support 3c an integrally formed body in which supporting grates and the support arms are not formed separately from each other. In its structure, the horizontal beam 3c a kind of "bionic" design. Starting from a central area 20 extend in the radial direction a plurality of base webs 21 , From the footbridges 21 in turn branch each two intermediate bridges 22 of which, in turn, two end bars each 23 branch. In the area between the jetties 22 . 23 These are through gutters 24 connected. In the edge region of the horizontal beam 3c rejects these pods 14c for receiving here not shown edge support, which extend through the edge opening 15c.

LIST OF REFERENCE NUMBERS

1

Shaft furnace frame

2

Vertical carrier / central support

3a, 3b, 3c

Horizontal support

4a, 4b, 4c

central opening

5a, 5b, 5c

peripheral opening

6

receiving portion

7

opening

8th

lifting wedge

9

head Start

10a, 10b, 10c

recess

11a, 11b

Beam

12

longitudinal web

13

crosspiece

14a, 14b, 14c

shell

15a, 15b

Stand Off

16

head Start

17

recess

18

cam

19a, 19b

support grid

20

Central area

21

base web

22

gutter

23

end web

24

gutter

26

web

Claims (10)

Furnace rack, in particular shaft furnace rack, for charging a furnace installation with a heat treatment material, comprising - at least one load-carrying vertical support and - a horizontal support arranged on the vertical support, characterized in that the horizontal support (3a, 3b, 3c), - for receiving a central support 2 formed Vertical support has a centrally disposed central opening (4a, 4b, 4c) and - for receiving at least two edge carriers formed as vertical supports at least two in the peripheral region of the horizontal support (3a, 3b, 3c) arranged edge openings (5a, 5b, 5c). Furnace rack after Claim 1 , characterized in that the central support 2 has a receiving portion (6) with projections (9) and the central opening (4a, 4b, 4c) to the projections (9) adapted recesses (10). Furnace rack after Claim 1 or 2 , characterized in that two horizontal supports (3a, 3b, 3c) in the longitudinal axis direction of the vertical support (2) are arranged at a distance from each other, wherein in the region between the horizontal supports (3a, 3b, 3c) on the vertical support 2 at least one spacer sleeve (15a, 15b) is arranged coaxially. Oven rack according to one or more of the preceding claims, characterized in that the central carrier can be arranged central carrier spacer - as a spacer sleeve (15b) both ends for twist-proof connection with the central opening (4a, 4b, 4c), - as an intermediate sleeve both ends for torsionally secure connection with a Spacer sleeve (15b) or - as an adapter sleeve (15b) at one end for a rotationally secure connection with a spacer sleeve (15a) and the other end to the twist-proof connection with the central opening (4a, 4b, 4c) is formed. Oven rack according to one or more of the preceding claims, characterized in that the recesses (10a, 10b, 10c) of the central opening (4a, 4b, 4c) distributed at a distance of 60 ° on the inside of the central opening (4a, 4b, 4c) are arranged, the spacer sleeve (15b) both ends two diametrically arranged, to the recesses (10a, 10b, 10c) adapted projections (16) and the adapter sleeve (15b) at one end two diametrically arranged and the other end at a distance of 60 ° or 90 ° Having the circumference distributed recesses (17). Oven rack according to one or more of the preceding claims, characterized in that the horizontal support (3a, 3b) at least two support arms (11a, 11b), preferably at least three support arms 11a, 11b, more preferably six support arms (11a, 11b), the their free ends each have an edge opening (5a, 5b). Furnace frame according to one or more of the preceding claims, characterized in that the support arms (3a, 3b) in the circumferential direction projecting cams 18 which are adapted to receive support grids (19a, 19b), between the support arms (11a, 11b). Oven rack according to one or more of the preceding claims, characterized in that the support grates are formed integrally with the horizontal support (3c). Oven rack according to one or more of the preceding claims, characterized in that the support grates (19a, 19b) and / or the integrally formed with the support rails horizontal carrier (3c) have a honeycomb structure and / or branched jet-shaped design. Oven rack according to one or more of the preceding claims, characterized in that the spacer sleeve (15a) for coupling two horizontal carriers (3a, 3b, 3c) is formed such that the horizontal support (3a, 3b, 3c) in the over the spacer sleeve (15a) taking place arrangement abut each other.

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