DE102021128265A1 - hot gas circulator - Google Patents

Abstract

The invention relates to a carrier unit (10) for fastening a gas circulation unit (50) to a base (101), in particular an oven, the carrier unit (10) having at least one first carrier part (11) for fastening to the gas circulation unit (50) and at least one second carrier part (12) for fastening to the base (101), and the first carrier part (11) can be connected to the second carrier part (12) via at least one fastening element (13) in order to mount the gas circulation unit (50) on the base ( 101) to attach. Here it is provided according to the invention that the first support part (11) is designed to be adjustable in position relative to the second support part (12), whereby the gas circulation unit (50) can be adapted to different installation situations on the base (101). The invention also applies to a gas circulation unit (50) with a carrier unit (10) according to the invention for attachment to the base (101), in particular an oven, wherein the gas circulation unit (50) has a motor (51) with a motor axis and a fan wheel (52) which is driven by the Motor axis from the motor (51) can be driven.

Description

The present invention relates to a support unit for fastening a gas circulation unit to a base, in particular an oven, according to the type defined in more detail in the preamble of claim 1. The invention also relates to a gas circulation unit according to the preamble of claim 11 and to a system with an oven and at least one gas recirculation unit according to the preamble of claim 17.

It is known from the prior art that a gas circulation unit can be attached using a base, in particular in the form of an (industrial) furnace, in order to be able to circulate the gas in the working space of the furnace. However, this gas is often very hot in the furnace, so that at least one fan wheel of the gas circulation unit, which is arranged in the working space of the furnace, is subject to high thermal loads. This fan wheel is usually driven by a motor in the gas circulation unit, which cannot withstand the same thermal loads in the work area. For this reason, it is known to arrange the motor of the gas circulation unit outside of the working space, ie in the thermally unloaded area of the furnace. The working space is thus limited by a furnace wall. The gas circulation unit is also fastened to this furnace wall, with part of the gas circulation unit protruding through an opening in the furnace wall into the working space, also referred to as the furnace chamber. Since there are many types of different (industrial) furnaces, the design of the furnace wall also differs significantly in terms of material and thickness. Nevertheless, the existing fan wheel of the corresponding gas circulation unit must always protrude far enough into the working space in order to be able to circulate the gas (gaseous fluid in the working space) there successfully. In addition, the motor that drives the fan wheel must be located in a thermally unstressed area on the base or the furnace. For this purpose, depending on the design of the furnace or application, different gas circulation units are constructed in order to be able to do justice to the respective installation situation. Consequently, different constructively configured gas circulation units are necessary in order to do justice to the respective applications. For this purpose, the distance between the motor and the fan wheel of the gas circulation unit is often changed for this purpose.

Also is from the pamphlet CN 211599057 U It is known to provide a gas circulation unit with a fan wheel for industrial furnaces, the corresponding motor for driving the fan wheel being water-cooled in order to be able to cope with existing thermal problems. From the pamphlet IT 201800010428 A1 a gas circulation unit with a fan wheel for an industrial furnace is known, which can be attached to the furnace wall from the outside. Here, too, the fan wheel, which is arranged in the oven, is driven by the motor via a motor axis. In order to protect the engine from increased temperatures, the engine is ventilated in a targeted manner using additional elements.

A gas circulation unit that can be used for different installation situations without structural changes is not known from the prior art.

It is therefore an object of the present invention to at least partially eliminate the disadvantages described above. In particular, it is the object of the present invention to provide a carrier unit for fastening a gas circulation unit to a base, in particular an oven, whereby the gas circulation unit can be adapted to different installation situations on the base. As a result, it should also be possible to adapt one and the same carrier unit and one and the same gas circulation unit to different installation situations, in particular without structural changes. Ideally, the motor of the gas recirculation unit can withstand the temperatures that arise from the furnace.

The above object is achieved by a carrier unit for attaching a gas circulation unit to a base, in particular an oven, having the features of claim 1, a gas circulation unit having the features of claim 11, and by a system with an oven and at least one gas circulation unit having the features of Claim 17. Further features and details of the invention result from the respective dependent claims, the description and the drawings. Features and details that are described in connection with the carrier unit according to the invention also apply, of course, in connection with the gas circulation unit according to the invention and the system according to the invention, and vice versa, so that with regard to the disclosure of the individual aspects of the invention, reference is always made to one another can.

The object is achieved in particular by a carrier unit for fastening a gas circulation unit to a base, in particular an (industrial) furnace, the carrier unit having at least one first carrier part for fastening to the gas circulation unit and at least one second carrier part for fastening to the base, and that first carrier part can be connected to the second carrier part via at least one fastening element, to attach the gas recirculation unit to the base. In this case, it is provided that the first carrier part is designed to be adjustable in position relative to the second carrier part, as a result of which the gas circulation unit can be adapted to different installation situations on the base. The carrier unit according to the invention also allows the number of components required for different installation situations in gas circulation units to be reduced to a minimum. This also allows the storage and production costs to be reduced accordingly. Nevertheless, a simple assembly of the gas circulation unit can be realized by the carrier unit according to the invention on the base without any structural changes to the gas circulation unit. The (industrial) furnace has a working space, in particular in the form of a furnace chamber, the working space being formed by existing furnace walls of the furnace. The gas circulation unit can advantageously be fastened directly or indirectly (e.g. with (thermal) insulation) from the outside by the carrier unit to these furnace walls of the furnace, which serve as a concrete basis for the gas circulation unit. Since the gas circulation unit has a very stable structure in order to meet the mechanical and thermal requirements, it also has a decent weight of between 30 kg and 2,000 kg, preferably between 50 kg and 1,950 kg and very preferably between 80 kg and 1,850 kg. In addition, the fan wheel is operated at a speed of more than 1,000 rpm, preferably more than 2,500 rpm and very preferably more than 3,500 rpm in normal operation, with the maximum speed in particular not being greater than 5,000 rpm to be able to circulate a sufficient volume in the working space of the furnace. For this purpose, the fan wheel preferably has a diameter of more than 300 mm, preferably more than 750 mm, with the diameter preferably not being greater than 1,500 mm. So that the fan wheel can withstand the high temperatures (greater than 400° C.) in the working area, it can preferably have heat-resistant or high-temperature-resistant steel. In the case of chemically aggressive gases in the working area, it is advisable for the fan wheel to be made of stainless steel.

In addition, it is conceivable within the scope of the invention for the first carrier part to be configured to be positionally adjustable relative to the second carrier part (the carrier unit) during assembly, in particular relative to the base, by means of the fastening elements provided, as a result of which the carrier unit and/or the gas circulation unit cannot be changed during assembly on different Installation situations at the base can be adjusted from the outside and the gas circulation unit can be rigidly fastened to the base for safe operation after assembly. The term "change-free" should be understood to mean that no complex work, such as drilling, welding, etc., has to be carried out on the carrier unit or the gas circulation unit for changes in order to attach the gas circulation unit with the carrier unit to the base. Rather, the position of the first carrier part relative to the second carrier part is adapted to the respective installation situation of the gas circulation unit and fixed by the fastening elements during assembly (in the sense of unchangeably fastened to one another). At least the first carrier part or the second carrier part expediently has metal, in particular an alloy with or without a coating, in order to enable stable attachment. With a non-rusting alloy, such as V2A or V4A, there is no need for an additional coating of the carrier parts in order to avoid corrosion. The coating itself can preferably be designed as a hot-dip galvanized coating or as a plastic coating or chrome coating (or a combination thereof) in order to protect the carrier parts against corrosion in the long term. It is also conceivable that the carrier parts are provided with a layer of lacquer

In the case of the invention, it can advantageously be provided that at least the first carrier part or the second carrier part has a plurality of carrier elements which are present overall for fastening the gas circulation unit to the base. Thus, the carrier unit can have at least two carrier parts, wherein at least one carrier part can in turn have at least two carrier elements. Advantageously, at least the first or second carrier part can be designed like a frame and in particular can enclose the gas circulation unit at least partially or completely on the peripheral side. By subdividing the carrier parts into at least two carrier elements, the production of the carrier parts and the attachment to the base and to the gas circulation unit can be significantly simplified. Ideally, the support elements for the support parts can be designed in the same way, which further simplifies production and additionally reduces the number of different parts. It is particularly advantageous if all support elements for a support part are of identical design, as is preferably possible with the second support part, or at least only two different designs are required for a support part, as is possible with the first support part. The first carrier part can also be made up exclusively of identical carrier elements in order to further reduce the number of parts.

Furthermore, it is conceivable that the first carrier part can be firmly connected to the gas circulation unit, in particular a base plate. Consequently, this connection can already take place at the factory of the gas circulation unit and not only during assembly. In this case, the first carrier part by a Screw, and / or rivet and / or adhesive and / or welded connection with the gas circulation unit, in particular the base plate, be connected. Lock screws with a flat (lentil-shaped) screw head and an adjoining square can preferably be used here for form-fitting mounting in a (square) hole (in at least the first support part). The lock screws have the advantage that they can be held in the first carrier part without the use of tools but in a torque-proof manner. Consequently, the attachment of the second carrier part by the carriage bolts is very easy, since they only have to be secured by a nut (for each carriage bolt).

The base plate of the gas circulation unit can serve as a supporting element for the motor with the fan wheel (as well as other components such as control unit, gears, etc.) of the gas circulation unit and is therefore ideally suited to also be connected to the first support part. In the case of a rectangular base plate, preferably 2 (angle-shaped) or 4 (plate-shaped) support elements of the first support part can surround and be attached to the base plate on each side. The first carrier part can also be held in a form-fitting manner on the base plate. In order to simplify the attachment of the first carrier part to the second carrier part, the first carrier part can form an angle, in particular a right angle, to the base plate. For this purpose, the base plate itself can have a bevel (on the edge) which is used for attachment to the first carrier part.

At least two different positions for attaching a fastening element can preferably be present on the first carrier part. These different positions make it possible for the position of the first carrier part to be changed offset in height relative to the second carrier part. For this purpose it is conceivable that all fastening elements are arranged in a row and preferably also at the same height for a specific position of the gas circulation unit. For a position deviating from this, which allows a height offset between the carrier parts, the fastening elements are then again preferably arranged in a (parallel) row. Preferably there are at least three or four different positions (by 3 or 4 corresponding parallel rows of fasteners) for locating the fasteners, thus allowing at least three or four different height adjustments in the support unit. As a result, the gas circulation unit can then be adjusted in terms of height in its position without any technical effort and without structural changes.

Preferably, at least three or four or five fastening elements can be arranged in a row on each carrier element from the first carrier part, whereby a very stable attachment of the first carrier part to the second carrier part can be realized in order to be able to firmly connect the entire gas circulation unit to the base.

When mounting the gas circulation unit on the base using the support unit, it is expedient to first attach the second support part to the first support part at the desired position by attaching the fastening elements. The gas circulation unit can then be moved to the desired location on the base in order to attach the gas circulation unit there to the base with the second carrier part.

It can also be possible that the second carrier part can be connected to the base by fixing elements. The fixing elements themselves can also be designed in the form of screws which are screwed through holes or bores in the second support part for attachment to the base. For this purpose, corresponding bores in the area of the holes of the second carrier part can be made in the base in advance, which are used to fasten the screws (as fixing elements) in the base. The fixing elements designed as screws can be attached to the holes or bores in the base using dowels. It is also conceivable that the screws are glued in the bores of the base using assembly adhesive, in order to thus firmly connect the second carrier part to the base by the fixing elements. It is also conceivable that the fixing elements are designed as threaded bolts (protruding from the base) which are provided with nuts for fastening the carrier part. If the concrete use of a gas circulation unit is already planned in the furnace construction, the fixing elements can also be incorporated directly during the manufacture of the furnace wall (e.g. concreted or walled in) and firmly connected.

At least two different positions for attaching a fastening element can preferably also be present on the second carrier part. Even with these different positions, fastening elements can be present in a row on the second carrier part in order to bring about a height offset between the first and the second carrier part during fastening. It is also conceivable for two rows of fastening elements to be used to fasten the first to the second carrier part, as a result of which the mechanical connection can be further improved.

Furthermore, it can be provided that on the carrier part, in particular the first carrier part, Transport elements, preferably in the form of at least one tab or an eyelet, are present in order to simplify the transport and assembly of the gas circulation unit. Corresponding lugs or eyelets can also be provided on the motor as transport elements for the gas circulation unit. The transport elements mentioned above can simplify the arrangement of the gas circulation unit on the base during assembly. In this way, the gas circulation unit can be lifted to the desired location with a crane via the transport elements, in order to then connect the gas circulation unit to the base there using the fixing elements.

It can preferably be provided within the scope of the invention that at least one (elongated) carrier element of the second carrier part is designed in an angled manner, in particular with legs of the same length. A first angled leg of the second support part can preferably be used for arranging the fastening elements and a second angled leg can be used for arranging the fixing elements, with the fixing elements being present for fastening the second support part to the base. As previously mentioned, the entire carrier unit can circumferentially surround the gas circulation unit. For this purpose, it is expedient that both the first and the second carrier part can correspondingly surround the gas circulation unit in terms of circumference. Since the two carrier parts can consist of individual carrier elements, the individual carrier elements of a carrier part surround the gas circulation unit at least in sections. Ideally, the first angle leg of the second carrier part lies flat against the first carrier part when it is fastened. The second angled leg of the second carrier part, on the other hand, can lie flat on the base and can be stably attached there with the fixing elements.

It is also optionally conceivable that at least the first or second carrier parts are connected to one another in a non-positive and/or positive and/or material connection in order to form the corresponding carrier unit. It is also conceivable that the two carrier parts are attached to each other via hooks and/or bolts in addition to the existing fastening elements. The hooks and bolts mentioned above can also be used for simplified assembly of the second carrier part on the first carrier part. The two carrier parts can then be finally fastened to one another via the fastening elements mentioned.

Furthermore, it is optionally provided that the fastening elements have holes on the one hand and fastening means on the other hand, the holes being arranged at least in the first or second carrier part, in particular offset in position (preferably in rows), and the fastening means at least partially penetrating the holes in order to achieve a force- and / or to produce a form-fitting connection between the first and second support part during assembly. It is also conceivable that the fastening means are designed in the form of rivets, screws (in particular carriage bolts), bolts and/or webs, and/or preferably the holes are at least partially provided with internal threads or a polygon, such as a square. It is particularly preferred if the fastening elements designed as holes are arranged in the first carrier part. The holes can be arranged next to one another in a row on the first carrier part, in order to thus form a first position for the second carrier part. Below this first row, a second row with holes can be arranged offset in height, which form a second position for the second carrier part. In the second carrier part, holes can also be arranged in a row, which are used for attachment to the first carrier part. Fastening means in the form of rivets, screws, bolts and/or webs can then be inserted through the holes in the first and in the second carrier part in order to connect the first carrier part to the second carrier part. It is also conceivable that the holes in the first support part are preferably designed with an internal thread and interact with screws that are also initially inserted through the holes in the second support part and then screwed to the internal threads in the first support part. If the internal threads in the holes are omitted, the screws that protrude through the two holes in the first and in the second support part must be screwed with a nut, preferably with a locking ring.

It can also be advantageous within the scope of the invention that the fastening elements are at least partially arranged in spaced parallel rows, in particular at least three or four spaced parallel rows of fastening elements being arranged in the first or second carrier part. The spaced parallel rows preferably have a height offset in order to change the height of the position of the second carrier part on the first carrier part. Spaced parallel rows of the fastening elements are preferably provided only in the first carrier part, which rows correspond in particular to a row of fastening elements in the second carrier part. Since, in particular, the support elements of the second support part are designed to be structurally identical, there is no risk of confusion when mounting the second support part on the first support part.

The invention also relates to a gas circulation unit with a carrier unit any of the preceding claims for attachment to the base, in particular an oven. It is provided here that the gas circulation unit has a motor with a motor axis and a fan wheel which can be driven by the motor through the motor axis. The gas circulation unit according to the invention thus brings with it the same advantages as have been mentioned in detail with reference to the carrier unit mentioned above. In addition, the gas circulation unit can be suitable for use in various installation situations (in industrial furnaces) without structural changes. Both the production and the storage costs can thus be significantly reduced.

It is also conceivable that the fan wheel is directly connected to the motor axis of the motor in a rotationally fixed manner, and that a distance between the motor and the fan wheel is preferably unchangeable in order to achieve high mechanical stability. Since the fan wheel of the gas circulation unit can be operated at speeds of more than 2,500 rpm, the fan wheel itself must be connected to the motor axis of the motor in a stable and secure manner. Ideally, the fan wheel is balanced in order to avoid disturbances caused by imbalances at the high speeds. A thermal decoupling element is preferably provided between the fan wheel and the motor, in particular on the motor axis, e.g. in the form of porcelain, in particular as a sleeve between the fan wheel and the motor axis, in order to avoid a direct temperature input via the fan wheel onto the motor axis towards the motor. It is also conceivable that a cooling element is used to cool the motor. The cooling element can preferably be provided as a cooling disk, in particular with cooling ribs, in the area between the fan wheel and the motor, preferably between the base plate and the motor. In this case, the cooling element can be connected in a rotationally fixed manner to the motor axis and rotate with it. In order to reduce temperatures for the motor, the cooling element can comprise a thermally conductive metal, preferably aluminum or copper. The present gas circulation unit can therefore also be used under high thermal loads, e.g. at temperatures of around or greater than 800°C in the working area of a furnace.

It can also be possible for the motor to be attached to the fan wheel on a base plate, with the motor being arranged on a first side of the base plate and the fan wheel being arranged on an opposite, second side of the base plate. The base plate can serve as a support element for the motor with the fan wheel, as already described above. It is also conceivable that the base plate is double-walled in order to achieve increased mechanical stability and to keep the thermal loads away from the motor.

It is also advantageous if at least one insulating element or damping element is present within the scope of the invention, the insulating element protecting the motor from high temperatures, in particular from the oven, and the damping element compensating for mechanical vibrations. The insulation element can be arranged parallel to the base plate inside a double-walled base plate or outside the base plate, but parallel to it. It is also conceivable that the insulating element is arranged on both sides of the base plate, namely once towards the motor and once towards the fan wheel. It is also conceivable that the four sides of a rectangular base plate are also provided with insulation elements. These lateral insulation elements are preferably arranged on the first carrier part. Ideally, the insulation elements themselves have low thermal conductivity in order to achieve an optimal thermal insulation effect. A value for the thermal conductivity of less than 0.1 W/(m*K), particularly preferably less than 0.08 W/(m*K), is preferably used. The insulation material can be polyurethane foams at low temperatures (below 150 °C) on the one hand, and fiber mats or fiber boards, in particular made of glass or ceramic fibers or rock wool, or other microporous materials suitable for insulation, such as glass foam or perlite boards, or glass fiber mats on the other at high temperatures (greater than 250 °C). Ideally, the insulation elements are provided with a refractory coating, such as an aluminum layer. Provision can preferably be made for at least part of the insulating element to be arranged on the second side of the base plate or on the first carrier part, preferably on the side facing away from the motor. The part of the insulation element on the first carrier part can also preferably surround the carrier part circumferentially. The mentioned damping elements can be constructed from rubber and have continuous receptacles for the fixing elements in order to compensate for the mechanical vibrations.

It is also conceivable within the scope of the invention for the first support part to be firmly connected to the base plate of the gas circulation unit, with the first support part preferably being aligned essentially perpendicularly to the base plate and in particular the first support part surrounding the base plate. For this purpose, reference is made to the already described design of the base plate with the possible fold in the previous paragraphs.

The subject of the invention is also a system with an oven and at least one gas circulation unit according to one of the preceding claims. Here it is provided that the oven, the serves as the basis for the gas circulation unit, has a working space, in particular a furnace chamber, which is at least partially surrounded by a furnace wall. There is an opening in the furnace wall in the area of the gas circulation unit, with the fan wheel protruding into the working space, in particular through the opening, in order to distribute the hot gases in the working space, and with the motor being position-adjustable on the outside of the working space on the furnace wall by the support unit attached to protect the motor from the temperatures in the working area. The system according to the invention thus brings with it the same advantages as have been mentioned in detail with regard to the gas circulation unit and the carrier unit.

In the system according to the invention, in particular, several gas circulation units can be present in order to be able to circulate the volume in the working space as completely as possible. Ideally, a gas circulation unit of the same construction is always used, which, depending on the installation situation, can be fitted to the furnace using the carrier unit in an appropriately adapted manner.

• 1 eine dreidimensionale Ansicht einer Trägereinheit mit einer Gasumwälzeinheit, wobei die Trägereinheit mit ihrem ersten und zweiten Trägerteil die Gasumwälzeinheit vollständig umgibt,
• 2 vergleichbare Ansicht zu 1, wobei jedoch vom zweiten Trägerteil ein abschnittsweises Trägerelement fehlt,
• 3 vergleichbar zur 2, wobei das vorhandene zweite Trägerteil in seiner Position höhenversetzt zum ersten Trägerteil aus 2 angeordnet ist,
• 4 vergleichbar zu den vorhergehenden Figuren, wobei jedoch das zweite Trägerteil höhenversetzt im obersten Bereich vom ersten Trägerteil angeordnet ist,
• 5 Explosionsansicht der Trägereinheit mit der Gasumwälzeinheit aus den vorherigen Figuren,
• 6 schematische Ansicht eine durch eine Trägereinheit befestigte Gasumwälzeinheit an einem Ofen, und
• 7 schematische Ansicht eines Dämpferelements zur Befestigung der Gasumwälzeinheit.

Further advantages, features and details of the invention result from the following description, in which exemplary embodiments of the invention are described in detail with reference to the drawings. The features mentioned in the claims and in the description can each be essential to the invention individually or in any combination. Show it:

• 1 a three-dimensional view of a carrier unit with a gas circulation unit, the carrier unit completely surrounding the gas circulation unit with its first and second carrier part,
• 2 comparable view to 1 , however, a sectional support element is missing from the second support part,
• 3 comparable to 2 , The existing second carrier part being offset in height from the first carrier part 2 is arranged
• 4 comparable to the previous figures, but with the second support part being offset in height in the uppermost area of the first support part,
• 5 Exploded view of the carrier unit with the gas circulation unit from the previous figures,
• 6 schematic view of a gas circulation unit attached by a support unit to a furnace, and
• 7 schematic view of a damping element for fastening the gas circulation unit.

In the following figures, the same reference numbers are used for the same technical features of different exemplary embodiments.

In the 1 until 5 the carrier unit 10 according to the invention is shown with a gas circulation unit 50 in a three-dimensional view. The carrier unit 10 has a first carrier part 11, which is fixedly mounted on the gas circulation unit 50, and a second carrier part 12, which is used for fastening to a base 101, in particular an oven 101, so that the position of the gas circulation unit 50 on the base 101 can be changed to fix. This attachment is in the 6 shown closer.

In the 5 An exploded view of the carrier unit 10 with the gas recirculation unit 50 is shown. It is easy to see that the first carrier part 11 consists of a total of four carrier elements 11.1, which surround the sides of a rectangular base plate 53 of the gas circulation unit 50. The motor 51 is connected to the base plate 53 on a first side 53.1 of the base plate 53 and on another, opposite, second side 53.2 the fan wheel 52 is connected to the motor 51 via a motor axis 51.1 (see Fig. 6 ). How good to go 5 can be seen, are in the support elements 11.1 of the first support part 11 (square or square) holes as fasteners 13, which are arranged horizontally in a row, available. Fastening means 13.2, in particular in the form of screws (preferably as carriage bolts 13.2, see Fig. 1 ), Bolts or rivets are inserted, in order to firmly connect the first carrier part 11 to the carrier part 12 . Furthermore, a carrier element 12.1 from the second carrier part 12 is provided on each side of the first carrier part 11. There are a total of four carrier elements 12.1 from the second carrier part 12, with each carrier element 12.1 being configured identically. Each carrier element 12.1 is expediently also designed to be elongate with an angle, the angle forming a first angle leg 12.2 and a second angle leg 12.3. Ideally, the angle legs 12.2, 12.3 are designed to be of the same length. The carrier element 12.1 is fastened to the first carrier part 11 with the first angle leg 12.2. The second angle leg 12.3, on the other hand, serves to fasten the second carrier part 12 to the base 101. Furthermore, holes 13.1 are arranged as fastening elements 13 in a row 13.3 in the first angle leg 12.2, which can interact with complementary holes 13.1 in the first carrier part 11. As can be seen clearly, a row 13.3 of fastening elements 13 preferably has five holes 13.1. Holes 15.1 for fixing elements 15 are also provided in the second angle leg 12.3, so that the second carrier part 12 is fixed to the base 101 to be able to attach. The fixing elements 15 can consist of screws and/or threaded rods and/or rivets or the like, which protrude through the holes 15.1 in order to fasten the second carrier part 12 to the base 101 when the carrier unit 10 is assembled.

From the 5 It can also be seen that the base plate 53 is of essentially rectangular construction and has bevels on the edges, which can be connected to the first carrier part 11 in order to thus form the gas circulation unit 50 with the carrier unit 10 . The motor 11, which is bolted to the base plate 53 via a round adapter, is attached to the base 101 on the outside (of the oven 101). The fan wheel 52 is arranged on the other side of the base plate, namely the second side 53.2. This second side 53.2 is also directed towards the working space 102 of the furnace 101.

In order to facilitate the assembly of the gas circulation unit 50 with the preassembled carrier unit 10, in particular the second carrier part 12 on the base 101, transport elements 16, in particular in the form of lugs or eyelets, are arranged at the corners of the carrier elements 11.1. In addition, transport elements 51.1 in the form of lugs or eyelets can also be arranged on the motor 51, as shown. Using these transport elements, the gas circulation unit 50 can be easily positioned by a crane at the desired point on the base 101 for further attachment.

In the 1 a three-dimensional view of the gas circulation unit 50 with a fully assembled support unit 10 is shown. In this case, the four support elements 12.1 are rigidly fastened by the second support part 12 via the fastening elements 13 on the four sides of the first carrier part 11. In the present case, the fastening elements 13 consist on the one hand of the (square) holes 13.1 in the first support part 11 and the second support part 12 and of screws 13.2, which are secured with nuts. These screws 13.2 protrude through the holes 13.1 in the support parts 11, 12. How well at the 1 can be seen, the four support elements 12.1 of the support element 12 enclose the entire gas circulation unit 50 circumferentially and correspond (mechanically) to the four support elements 11.1 of the first support element 11. The gas circulation unit 50 shown only has to be rigidly attached to the base 101 via the second support part 12 to enable safe operation of the entire system 100. As in 1 can further be seen, the second carrier part 12 is not attached to the top row 13.3 of the fastening elements 13 of the first carrier part 11, but to the second top row 13.3. Instead of the four carrier elements 12.1 from the second carrier part 12, only two carrier elements 12.1 can be provided for fastening the carrier unit 10 to a furnace wall 103. Ideally, these two carrier elements 12.1 are opposite one another in order to enable proper fastening to the furnace wall 103.

In the 2 , which is essentially the 1 corresponds to a carrier element 12.1 was removed from the second carrier part 12 for a better overview. The three rows 13.3 of the fastening elements 13 in the first carrier part 11 can thus be clearly seen. These parallel rows 13.3 are offset in height on the first carrier part 11 in order to be able to mount the gas circulation unit 50 on the base 101 depending on the installation situation. The insulation element 54 in the lower area of the carrier element 11.1 is also clearly visible. This part of the insulating element 54 protects the motor 51 from the side effects of heat from the working space 102 of the furnace 101. An insulating element 54 can also be arranged parallel to the base plate 53 in order to prevent thermal energy input from the second side 53.2 in the direction of the motor 51 . In addition, holes and openings for cooling can be arranged in the base plate 53 .

In the 3 , which is essentially the 2 corresponds, the second carrier part 12 was arranged on the bottom row 13.3 of the fastening elements 13 of the first carrier part 11. As a result, the entire gas circulation unit 50 as a whole can be moved upwards during assembly on the furnace 101 .

In the further 4 On the other hand, the second carrier part 12 is fastened in the top row 13.3 of the fastening elements 13 from the first carrier part 11. With this arrangement, the gas circulation unit 50 can be arranged particularly low (to the outer surface of the furnace wall 103). Otherwise the 4 in its design 3 . It should also be mentioned once again that only the different positioning of the second carrier part 12 on the first carrier part 11 is provided.

In the 6 1 is a schematic sectional view of the attached gas recirculation unit 50 on a base 101 in an aperture 104. FIG. It is clear that the fan wheel 52 is arranged on the second side 53.2 of the base plate 53 and protrudes into the working space 102 or the oven chamber 102 in order to be able to circulate the gas present there. The lower part of the insulating element 54 can also be clearly seen, which is arranged essentially parallel to the rectangular base plate 53 . In addition, the entire gas circulation unit 50 is fastened to the base 101 via the fixed carrier unit 10 , in particular from the outside to the furnace wall 103 via the fixing elements 15 .

It is also conceivable that a cooling element 14 is used to cool the motor 51 . The cooling element 14 can preferably be provided as a cooling disc, in particular with cooling ribs in the area between the fan wheel 52 and the motor 51 . In this case, the cooling element 14 can be connected in a rotationally fixed manner to the motor axis 51.1 and rotate with it. In the 6 the cooling element 14 is shown schematically between the base plate 53 and the motor 51 .

In the 7 a damping element 55 is shown by way of example, via which mechanical shocks emanating from the gas circulation unit 50 can be damped. These damping elements 55 can be applied between the carrier unit 10 and the base 101 in order to be able to absorb the mechanical shocks. For this purpose, the second support part 12 can be screwed to the base 101 with the respective damping elements 55 which are arranged below the second support part 12 by the fixing elements 15 . The damping elements 55 can also be used for height compensation when mounting the gas circulation unit 50 on the base 101 .

The above explanation of the embodiments describes the present invention exclusively in the context of examples. It goes without saying that individual features of the embodiments can be freely combined with one another, insofar as this makes technical sense, without departing from the scope of the present invention.

Reference List

10

carrier unit

11

first carrier part

11.1

carrier element

12

second carrier part

12.1

carrier element

12.2

first angle leg

12.3

second angle leg

13

fastener

13.1

holes

13.2

Fastening means, in particular carriage bolts

13.3

series of 13.2

14

Cooling element, in particular cooling disc

15

fixing element

15.1

holes

16

Transport element, in particular mounting brackets

50

gas recirculation unit

51

engine

51.1

motor axis

52

fan wheel

53

base plate

53.1

first page

53.2

second page

54

isolation element

55

damper element

100

system

101

Base, especially oven

102

Working space, in particular furnace chamber

103

furnace wall

104

breakthrough for 50

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• CN 211599057 U [0003]
• IT 201800010428 A1 [0003]

Claims (17)

Support unit (10) for attaching a gas circulation unit (50) to a base (101), in particular an oven, the support unit (10) having at least one first support part (11) for attachment to the gas circulation unit (50) and at least one second support part (12 ) for attachment to the base (101), and the first support part (11) can be connected to the second support part (12) via at least one attachment element (13) in order to attach the gas circulation unit (50) to the base (101). , characterized in that the first carrier part (11) is designed to be adjustable in position relative to the second carrier part (12), whereby the gas circulation unit (50) can be adapted to different installation situations on the base (101). Carrier unit (10) after claim 1 , characterized in that the position of the first carrier part (11) relative to the second carrier part (12) can be adjusted during assembly by the fastening elements (13) provided, in particular relative to the base (101), whereby the carrier unit (10) and/or the gas circulation unit (50) can be adapted from the outside during assembly to different installation situations on the base (101) and the gas circulation unit (50) can be rigidly fastened to the base (101) for safe operation after assembly. Support unit (10) according to one of the preceding claims, characterized in that at least the first support part (11) or the second support part (12) has a plurality of support elements (11.1) which are used overall to fasten the gas circulation unit (50) to the base (101). are present, and wherein in particular at least the first or second carrier part (12) is designed like a frame and the gas circulation unit (50) at least partially or completely encloses the circumference. Support unit (10) according to one of the preceding claims, characterized in that the first support part (11) can be firmly connected to the gas circulation unit (50), in particular a (101) base plate (53), and wherein preferably on the first support part (11) at least two different positions for attaching a fastening element (13) are present. Carrier unit (10) according to one of the preceding claims, characterized in that the second carrier part (12) can be connected to the base (101) by fixing element (15), with at least two different positions for attaching a fastening element in particular on the second carrier part (12). (13) are present. Carrier unit (10) according to one of the preceding claims, characterized in that the carrier part, in particular the first carrier part (11), has transport elements (16), preferably in the form of at least one strap or eyelet, to facilitate the transport and assembly of the To simplify gas circulation unit (50). Support unit (10) according to one of the preceding claims, characterized in that at least one support element (11.1) of the second support part (12) is designed in an angled manner, with in particular a (101) first angled leg (12.2) of the second support part (12) for arranging the Fastening elements (13) are used and a second angle leg (12.3) is used for arranging fixing elements, the fixing elements (15) for fixing the second carrier part (12) to the base (101) being present. Carrier unit (10) according to one of the preceding claims, characterized in that at least the first or second carrier parts (12) are connected to one another in a non-positive and/or positive and/or material manner in order to form the corresponding carrier element (11.1). Carrier unit (10) according to one of the preceding claims, characterized in that the fastening elements (13) have holes (13.1) on the one hand and fastening means (13.2) on the other hand, the holes (13.1) being offset in position at least in the first or second carrier part (12). , are arranged and the fastening means (13.2) at least partially penetrate the holes (13.1) in order to produce a non-positive and/or positive connection between the first and second carrier part (12) during assembly, and in particular wherein the fastening means (13.2) are designed in the form of rivets, screws, bolts and/or webs, and/or the holes (13.1) are preferably at least partially provided with internal threads or polygons. Carrier unit (10) according to one of the preceding claims, characterized in that the fastening elements (13) are arranged at least partially in spaced parallel rows (13.3) are arranged, in particular at least three or four spaced parallel rows (13.3) of fastening elements (13) are arranged in the first or second carrier part (12). Gas circulation unit (50) with a carrier unit (10) according to one of the preceding claims for attachment to the base (101), in particular an oven, the gas circulation unit (50) having a motor (51) with a motor axis and a fan wheel (52), which can be driven by the motor (51) through the motor axis. Gas circulation unit (50) after claim 11 , characterized in that the fan wheel (52) is directly connected to the motor axis of the motor (51) in a rotationally fixed manner, and preferably a distance between the motor (51) and the fan wheel (52) is unchangeable. Gas circulation unit (50) after claim 11 or 12 , characterized in that the motor (51) with the fan wheel (52) is attached to a base plate (53), the motor (51) being arranged on a first side (53.1) of the base plate (53) and the fan wheel (52 ) is arranged on a second opposite side of the base plate (53). Gas circulation unit (50) according to one of Claims 11 until 13 , characterized in that at least one insulating element (54) or a damping element (55) is present, the insulating element (54) protecting the motor (51) from high temperatures, in particular from the oven, and the damping element (55) being mechanical compensated for vibrations. Gas circulation unit (50) according to one of Claims 11 until 14 , characterized in that the first carrier part (11) is firmly connected to the base plate (53) of the gas circulation unit (50), the first carrier part (11) preferably being aligned essentially perpendicularly to the base plate (53) and in particular the first carrier part ( 11) surrounds the base plate (53). Gas circulation unit (50) according to one of Claims 11 until 14 , characterized in that at least part of the insulating element (54) is arranged on the second side (53.2) of the base plate (53) or on the first carrier part (11), preferably on the side facing away from the motor (51), and wherein preferably the part of the insulating element (54) on the first carrier part (11) surrounds the carrier part (11) circumferentially. System (100) with an oven and at least one gas circulation unit (50) according to one of the preceding claims, characterized in that the oven, which serves as a base (101) for the gas circulation unit (50), has a working space (102) which is at least partially surrounded by a furnace wall (103), and in the area of the gas circulation unit (50) there is an opening in the furnace wall (103), the fan wheel (52) protruding into the working space (102), in particular through the opening, in order to to distribute the hot gases in the working space (102), and wherein the motor (51) is fastened to the furnace wall (103) on the outside of the working space (102) in a position-adjustable manner by the support unit (10) in order to protect the motor (51) from the temperatures to protect in the workspace (102).

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