Device for degassing and gassing containers

Abstract

Device for degassing and gassing containers (3), comprising a rotary runner (2) transporting the containers (3) with a rotation axis (A) and a number N of positions (20) distributed over a circumference of the rotary runner (2), wherein at least one first connection opening (27) is provided at each position (20), wherein each position (20) is associated with a bell (22) sealing the position (20), wherein the bell (22) is mounted to be slidably in the vertical direction and can be raised or lowered relative to the position (20) for opening and closing, characterized in that the at least one first connection opening (27) is provided on a base (21) of the associated position (20), wherein an intermediate base (23) is provided on the base (21) of the position (20), which serves as a support surface for the container (3).

Description

FIELD OF APPLICATION AND STATE OF THE ART

[0001] The invention relates to a device for degassing and gassing containers, in particular already filled, unsealed containers in a packaging plant.

[0002] Since the shelf life of many products, especially food products, is affected by oxygen and / or humidity, it is common practice to evacuate packaging and then seal it gas-tight. Gas exchange is also common practice, meaning the containers are first evacuated and then filled with an inert gas.

[0003] For gas exchange, EP 0 566 173 A1, for example, discloses a system for degassing and gassing containers, comprising a rotary conveyor that transports the containers and has a plurality of positions, each of which has a support plate and can be closed by means of a bell by lifting the support plate. Each bell has a connection opening that ends in a disc arranged above the rotary conveyor and rotating with the rotary conveyor. Adjacent to the rotating disc is a fixed disc with connections for a vacuum pump and a gas supply, wherein slots are provided on the fixed disc, via which the connections ending on the rotating disc communicate with the vacuum pump for degassing or the gas supply for gassing, depending on the position of the rotary conveyor.

[0004] From DE 10 57 953 A and US 3,006,120, devices for degassing and gassing bag packages by means of rotary machines are known, wherein positions of the rotary machine are closed by means of a bell or a base fed from below.

[0005] US 735,978 shows a device for sealing cans in a vacuum environment comprising a rotary machine. TASK AND SOLUTION

[0006] It is an object of the invention to provide a maintenance-friendly device for degassing and gassing containers, which allows continuous process control.

[0007] This object is achieved by the device according to claim 1.

[0008] A device for degassing and gassing containers is provided, comprising a rotary conveyor which transports the containers and has an axis of rotation and a number N of positions distributed over the circumference, wherein at least one first connection opening is provided at each position, wherein a bell which seals off the position is assigned to each position, and wherein the bell is mounted so as to be displaceable in the vertical direction and can be raised or lowered relative to the position in order to open and close the position, wherein the at least one first connection opening is provided at a base of the associated position and wherein an intermediate base is provided at the base of the position, which serves as a support surface for the container.

[0009] The bell is raised and lowered, for example, via a slide track. The size of the bell defines a working space for degassing or gassing. To minimize the working space for different container sizes, an insert can be attached to the bell in one design, which can be used to reduce the working space for smaller containers.

[0010] The arrangement of the connection opening at a base is advantageous for gas flow in this position. To prevent the connection openings from being blocked by the containers accommodated, an intermediate base is provided at the base of the position, which serves as a support surface for the container.

[0011] According to one embodiment, a radial rotary feedthrough comprising a stator and a rotary body rotating with the rotary member and surrounding the stator is provided coaxially to the rotation axis for gas discharge or gas supply at the first connection opening.

[0012] The radial rotary union enables media supply or removal via a centrally located gas supply source and / or a vacuum pump.

[0013] In advantageous embodiments, the rotary body of the radial rotary feedthrough has N channels which radially penetrate the rotary body and are each assigned to a position and are fluidically connected to the first connection opening of this position, and wherein the stator has a connection opening for connection to a gas outlet or gas supply and at least one channel which is fluidically connected to the connection opening and opens circumferentially for a gas passage to at least one of the channels of the rotary body.

[0014] For continuous degassing and / or gassing using a rotary device, the rotary device preferably has multiple positions, with a degassing or gassing path extending over multiple positions of the rotary device. For this purpose, in one embodiment, a connection opening of the stator, which is connected to a gas supply source and / or a vacuum pump, is assigned a plurality of channels extending at least partially in the radial direction, with an angle between the channels being 360° / N. In different rotational positions, a circumferential opening of the stator channels is assigned to a channel of the rotating body.

[0015] In one embodiment of the device, the at least one channel of the stator has an opening extending circumferentially along a circular arc, via which the at least one channel of the stator is connected to at least two, preferably more than two, channels of the rotating body for gas passage. As a result, several channels of the rotating body, located in the region of the opening depending on the rotational position of the rotating body, are connected to the media supply or discharge connected to the stator channel.

[0016] In one embodiment, only one first connection opening is provided at each position, wherein the one first connection opening is connected by means of the radial rotary feedthrough to a vacuum pump for degassing or a gas supply for gassing depending on a position of the rotary conveyor.

[0017] In an advantageous embodiment, at least one first connection opening and one second connection opening are provided at each position for gas exchange, wherein the radial rotary feedthrough is assigned to the first connection opening, and wherein an axial rotary feedthrough is assigned to the second connection opening, comprising a rotary disk rotating with the rotary device and a stator disk, wherein the rotary disk N has channels axially penetrating the rotary disk, which are fluidically connected to the second connection openings, and wherein the rotary disk and the stator disk are arranged coaxially and axially next to one another. The use of two separate rotary feedthroughs prevents particles of the product, which may be sucked in during degassing, from being fed back to the position during subsequent gassing.By using two separate rotary unions, an overflow operation is also conceivable, in which degassing and gassing occur simultaneously. However, the device is preferably designed such that the positions in a first section of the rotary unit are first evacuated and then an inert gas is supplied.

[0018] In one embodiment, the rotating body and the rotating disk are manufactured as a single component. In advantageous embodiments, however, the components are manufactured separately.

[0019] In one embodiment, the rotating body and the rotating disk are coupled for rotation transmission, with the rotating body having connecting pieces that open into channels, each of which has a section that runs in alignment with the channels axially penetrating the rotating disk. The channels of the rotating disk are fluidly connected to the second connection openings by means of the rotating body. The rotating body serves as a central component for connecting lines, such as hoses or pipes, that connect the positions to the rotary unions.

[0020] In one embodiment, the rotating body and the rotating disk are directly coupled to each other for rotational transmission. In other embodiments, a sleeve that rotates with the rotating body and the rotating disk is provided between the rotating body and the rotating disk. The sleeve serves as a spacer for improved space utilization.

[0021] In one embodiment, detachable shaft coupling elements are provided between the rotating body and the rotating disk or between the rotating disk and the sleeve for repeated assembly and disassembly of the axial rotary union. The axial rotary union can be separated from the rotating body by movement in the vertical direction, with the separation plane lying either - if no sleeve is provided - between the rotating body and the rotating disk or - if a sleeve is provided - between the rotating body and the sleeve or between the sleeve and the rotating disk. The simple disassembly and assembly of the axial rotary union enables, for example, an adaptation of a process control by replacing a stator disk. It is also conceivable to disassemble the axial rotary union, for example for cleaning.This is particularly advantageous if the axial rotary union is used for evacuation and particles can be sucked into the axial rotary union.

[0022] In an advantageous embodiment, the axial rotary union is arranged below the radial rotary union, with media being supplied or removed from the bottom of the axial rotary union and media being supplied or removed from the top of the radial rotary union. This allows, for example, disassembly of the axial rotary union by lowering it relative to the rotary unit.

[0023] In one embodiment, the radial rotary union is used for degassing and the axial rotary union is used for gassing. In advantageous embodiments, however, a reversed media supply is provided, with at least one vacuum pump, preferably several vacuum pumps, being connected to the stator disk of the axial rotary union. By connecting several vacuum pumps, a step-by-step evacuation is possible, with different pressure levels being set by means of the vacuum pumps. The use of four vacuum pumps has proven advantageous in one process. However, the use of more or fewer than four vacuum pumps is also conceivable. The number of vacuum pumps can be selected to suit the respective process, and the device can be adapted by replacing the stator disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Further advantages and aspects of the invention emerge from the claims and from the following description of preferred embodiments of the invention, which are explained below with reference to the figures. These show schematically: Fig. 1: a device for degassing and gassing containers comprising a rotary conveyor in a plan view; Fig. 2: schematically a process for loading, closing, opening and unloading a position of the rotary table according to Fig. 1; Fig. 3: a sectional view of a position of the rotary runner closed by a bell according to Fig. 1; Fig. 4: a sectional view of an axis of the rotary table according to Fig. 1 with a device for media supply and media removal comprising a rotating connection assembly and a stator disk; Fig. 5: a detail of a first rotary union for a gas supply in a sectional view; and Fig. 6: the stator disc of the media supply and discharge according to Fig. 4 in a top view. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Fig. Figure 1 shows a schematic plan view of a device 1 for degassing and gassing containers. The device 1 is, for example, part of a packaging system for food and / or other products, in particular for milk powder. Gas exchange takes place in the device 1 by evacuating or degassing containers filled with a product but not yet sealed gas-tight, and then filling or gassing them with an inert gas, in particular N2, or a mixed gas, for example N2 and CO2.

[0026] The device 1 comprises a rotary table 2 with a rotational axis A and a plurality of positions 20, 32 in the illustrated embodiment, evenly distributed over the circumference. The rotary table 2 can be rotated intermittently or continuously about its rotational axis A. For loading and unloading, inlet and outlet wheels 10, 12 are provided in the illustrated embodiment, which run synchronously with the rotary table 2. However, other loading and unloading devices are also conceivable.

[0027] A rotary machine 2 allows for continuous process execution, with various process steps being carried out distributed over the circumference of the rotary machine 2. In the illustrated embodiment, six zones I to VI are provided.

[0028] In a first zone I of the rotary machine 2, the rotary machine 2 is loaded or unloaded with containers.

[0029] The containers fed to the rotary conveyor 2 are transported after loading by rotation of the rotary conveyor 2 and pass through further zones, in the illustrated embodiment five zones I to V. In the illustrated embodiment, degassing takes place in several, namely four zones II, III, IV and V, with different pressure levels being applied in zones II, III, IV and V so that the containers are evacuated step by step. In a further zone VI, gassing with an inert gas takes place. The containers are then unloaded in the first zone I and fed, for example, to a flanging system (not shown) and sealed.

[0030] For degassing containers, for example, a gradual increase in the applied vacuum pressure, starting from ambient pressure up to a final pressure p of, for example, p < 50 mbar, in four steps has proven advantageous. The length of the last zone V along the circumference, and thus the residence time of the containers in this zone V, is selected to be greater than the length of the preceding zones II to IV. The gradual control of the vacuum pressure leads to a brief expansion of a powdered product, a so-called powder bed, which allows for degassing even at lower layers in the powder. Gassing is preferably carried out with a slight overpressure.

[0031] In the illustrated embodiment, zones II to IV each have the same length, extending over two positions. However, other designs are also conceivable. The dwell time in the zones depends on their length and a rotation speed. In one embodiment, the zones are selected such that, at a constant rotation speed, the dwell time in zones II to IV is each the same. In the illustrated embodiment, the dwell time in zone V is approximately ten times the dwell time in zones II to IV, and the dwell time in zone VI is approximately four times the dwell time in zones II to IV. However, the dwell times shown are merely examples.

[0032] For degassing and subsequent gassing, positions 20 are closed, in particular sealed gas-tight.

[0033] Fig. 2 shows schematically a sequence of loading, closing, opening and unloading of a position 20 of the rotary table 2 according to Fig. 1. At position 20, a bell 22 is provided, which is lowered by means of a switching rod 24, which is guided in a slotted guide (not shown), to close position 20 and is raised again after the gas exchange has taken place to discharge position 20. The bell 22 forms, with a base 21 of position 20, a chamber for receiving the container. For gas exchange in the chamber, at least one Fig. 2, a connection opening (not shown) is provided, via which an interior of the position 20 closed by the bell 22 can be connected to a vacuum pump for evacuation and / or a gas supply for gassing. In the illustrated embodiment, the base 21 has a circumferential edge onto which the bell 22 is placed in a sealing manner. The base 21 serves as a transport plane for the container 3 during rotation of the rotary conveyor 2.

[0034] In the illustrated embodiment, containers 3 are fed to position 20 in a filled but unsealed state. However, it has been found that any product loss due to sucked-in particles can be reduced if the opening through which the interior of the container communicates with the environment is as small as possible. It is therefore known to place a lid on the container 3 without yet connecting the lid to the container 3 in a gas-tight manner. The gas-tight connection is only made after gas exchange. For processing containers 3 without lids in place, a cover element 26 is provided on the bell 22 in the illustrated embodiment, which cover element 26 is placed on the open container 3.

[0035] A plunger 25 is provided for movement of the cover element 26 relative to the bell 22, wherein the plunger 25 also allows adjustment of the height of the cover element 26 in a mounted state for containers 3 of different sizes. In order to reduce the internal volume of the position 20 closed by the bell 22 in the case of very small containers 3, an insert (not shown) is provided in one embodiment in the interior of the bell 22. The cover element 26 is described further below in connection with Fig. 3 described in more detail.

[0036] Fig. Figure 3 shows schematically in a sectional view an embodiment of a position 20 of the rotary device closed by means of a bell 22 according to Fig. 2 with a container 3.

[0037] As described above, in the illustrated embodiment, a cover element 26 is provided on the bell 22, which is placed onto the open container 3. The illustrated cover element 26 has a plurality of circular openings 260, through which an interior of the container 3 is connected to the environment when the cover element 26 is in place. In the illustrated embodiment, the cover element 26 comprises two disks 261, 262, with a filter element inserted between the disks 261, 262. In other embodiments, a filter element is omitted and / or a disk that also functions as a filter element is provided. In one embodiment, a fabric, in particular a metal fabric, with a mesh size of approximately 10 µm to approximately 100 µm is provided as the filter element. A mesh size and / or a material of the fabric can be selected by the person skilled in the art depending on the product, for example, depending on a powder class.The filter element allows degassing but reduces product leakage. During degassing, any particles that may accumulate on the filter element are released by the gas supply during the gassing process. Thus, when the filter element is gassed, it is simultaneously cleaned. In one embodiment, an additional filter element is provided in the area of ​​the first zone I according to... Fig. 1, a cleaning device for the filter element is provided. Alternatively and / or additionally, the filter element can be replaced when changing products.

[0038] The cover element 26 shown lies sealingly against a container edge 31, so that gas exchange occurs exclusively via the openings 260. This prevents contamination of the edge of the container 3 by particles of the product that are sucked in during degassing.

[0039] As mentioned, each position has at least one connection opening for connection to a vacuum pump and / or a gas supply. Fig. 3, an intermediate floor 23 with through openings is provided, on which the container 3 stands, so that a container floor 30 is spaced from the floor 21 with the connection openings. A first connection opening 27 is provided on the floor 21, by means of which the position 20 can be communicated with a gas supply. For this purpose, a first line 4 is connected to the connection opening 27, which is moved with the position 20 around a central axis of the rotary table 2. Gas exchange takes place, for example, by displacing the air present at the position 2. In the embodiment shown, a second connection opening 28 is provided on the floor 21, by means of which the position 20 can be communicated with a vacuum pump. For this purpose, a second line 5 is connected to the connection opening 28, which is also moved with the position 20 around the central axis of the rotary table 2.

[0040] The lines 4, 5 preferably extend at least substantially radially with respect to a central axis of the rotary device 2 according to Fig. 1.

[0041] Fig. 4 shows in a sectional view a central axis A of the rotary table 2 according to Fig. 1 with a first rotary union 6 for gas supply and a second rotary union 7 for degassing.

[0042] The first rotary union 6 is designed as a radial rotary union 6 and comprises a stator 60 and a rotating body 62 that rotates with the rotary unit 2 and surrounds the stator 60. The rotating body 62 is connected, for example, as shown, to a turntable 29 of the rotary unit, for example, by means of a screw connection. The rotating body 62 rotates around the stator 60. In the illustrated embodiment, the rotating body 62 is supported on the stator 60 by two rolling bearings 64. In other embodiments, plain bearings are provided.

[0043] Channels 620 are provided on the rotary body 62, which radially penetrate the rotary body 62 and the first connection pieces 66 for connection to the first connection openings 27 of the positions 20 according to the Fig. 1 to 3. The connection is made via suitable first lines 4, in the form of hoses or pipes or the like. For use with a rotary table 2 with 32 positions 20, 32 first connecting pieces 66 are provided, of which, however, in the sectional view according to Fig. 4 only two first connecting pieces 66 with adjoining channels 620 are visible.

[0044] The stator 60 has a connection opening 600 for connection to a gas supply (not shown) and a channel 601 fluidly connected to the connection opening 600. The channel 601 has a first section extending in the axial direction and a second section extending in the radial direction. The radially extending section is arranged at the same height as the channels 620 of the rotating body 62, so that the channel 601 of the stator 60 is connected to at least one of the channels 620 of the rotating body 62 for gas passage.

[0045] Fig. 5 shows schematically a section of an embodiment of the rotary union 6 according to Fig. 4 comprising the stator 60 with the channel 601 and the rotary body 62 with several channels 620 extending radially to the central axis A in a sectional view. As in Fig. 4 and Fig. 5, the channels 620 of the rotating body 62 end at the stator 60. The illustrated stator 60 has a channel 601 with a sector-shaped recess, which adjoins the central connection opening 600, and with an orifice 602 extending circumferentially along a circular arc. A gas used for gassing is supplied via the central connection opening 600 to the channels 620, which are located in the region of the orifice 602. By rotating the rotating body 62 with the channels 620 about the central axis A, the positions 20 are communicated with the gas supply one after the other depending on the angle of rotation. The length of the orifice can be suitably selected by a person skilled in the art, depending on the application, for a desired duration of the gas supply.

[0046] For degassing, it would be conceivable to provide one or more further channels on the stator 60, which can be connected to one or more vacuum pumps and which are also connected to one or more of the channels 620 of the rotating body 62 for gas passage.

[0047] In the Fig. In the embodiment shown in Figure 4, a second rotary union 7 is provided for degassing. The second rotary union 7 is designed as an axial rotary union 7 and comprises a rotary disk 70 rotating with the rotary member 2 and a stator disk 72. The rotary disk 70 has channels 700 axially penetrating the rotary disk 70, which open into openings 701 on an upper side adjacent to the stator disk 72.

[0048] Connections 80 for vacuum pumps (not shown) are provided on the stator disk 72. In the illustrated embodiment, connections 80 are provided for four vacuum pumps. The stator disk 72 is arranged on a mounting plate 82. A pin 83 is provided on the stator disk 72, with the rotating disk 70 being supported on the pin 83 by means of a suitable roller bearing 84.

[0049] In the illustrated embodiment, a rolling bearing 85 is also provided between the stator disk 72 and the rotating disk 70. The stator disk 72 and the rotating disk 70 have coaxially arranged annular projections, wherein the stator disk 72 and the rotating disk 70 touch in the region of the annular projections or a gap remains between the stator disk 72 and the rotating disk 70. Stationary sliding sleeves 86, 87 are provided on both sides of the projections, viewed in the radial direction. The sliding sleeves 86, 87 serve both to guide the rotating disk 70 and to seal the axial rotary feedthrough from the environment.

[0050] In the illustrated embodiment, connecting pieces 67 are provided for the lines 5 connected to the second connection openings 28 (cf. Fig. 3) is provided on the rotating body 62. The connecting pieces 67 are assigned channels with axially extending sections 670 in the rotating body 62, which are aligned with the channels 700 of the rotating disk 70. Between the rotating body 62 and the rotating disk 70, a sleeve 74 is also provided, which rotates with the rotating body 62 and the rotating disk 70 and has channels 740 penetrating the sleeve 74 in the axial direction.

[0051] For degassing, positions 20 (cf. Fig. 3) can each be connected to a vacuum pump connected to the connections 80 by means of the axial rotary feedthrough 7.

[0052] Fig. 6 shows the stator disk 72 in a plan view. The stator disk 72 comprises a rotation disk 70 in use according to Fig. 4 facing top side 720, on which in the illustrated embodiment four recesses 721, 722, 723, 724 are provided. At each recess 721, 722, 723, 724 there is an opening 725 for a connection 80 according to Fig. 4 is provided, via which the recesses 721, 722, 723, 724 are each communicated with a vacuum pump.

[0053] When the rotation disk 70 rotates according to Fig. 4, the openings 701 of the rotary disk 70 reach the area of ​​one of the recesses 721, 722, 723, 724, as in Fig. 4 on the right, so that a corresponding connection piece 67 communicates with a vacuum pump connected to the recess 724. In other rotational angle positions of the rotary disk 70, the opening 701 of this position is as in Fig. 4 shown on the left is closed by the upper side 720 of the disc 72. In the illustrated embodiment, four zones (cf. Fig. 1) along a circumference of the rotary table 2, each of which is assigned a vacuum pump. Each vacuum pump can be suitably designed to achieve a vacuum pressure to be achieved in the zone.

[0054] In the illustrated embodiment, separate systems are provided for gas supply and evacuation of positions 20. This has the advantage that, during an evacuation, any particles sucked into the second lines 5 and subsequent components are not blown to position 20 during a subsequent gas supply.

[0055] The Fig. The embodiment shown in Figure 4, in which the rotating disk 70, the rotating body 62, and the sleeve 74 are manufactured as separate components, is advantageous both in terms of manufacturing and in terms of space utilization. However, it will be apparent to those skilled in the art that, in a modified embodiment, the rotating body 62, the sleeve 74, and the rotating disk 70 can also be designed as a single component and / or that a sleeve 74 can be omitted.

[0056] In the illustrated embodiment, the axial rotary union 7 is arranged below the radial rotary union 6 and below a rotary plate 29 of the rotary unit, wherein vacuum pumps for the axial rotary union 7 are connected from below and a gas supply to the radial rotary union 6 is provided from above.

[0057] In the Fig. In the embodiment shown in Figure 4, the axial rotary feedthrough comprising the rotary disk 70 and the stator disk 72 is removable for cleaning. For this purpose, the rotary disk 70 and the sleeve 74 have complementary shaft coupling elements, so that disassembly is possible, in particular, by lowering the mounting plate 82 with the stator disk 72 and the rotary disk 70 relative to the rotary table 29 of the rotary table 2. For easy assembly without misalignment, the rotary disk 70 and the sleeve 74 have conical contact surfaces, by means of which centering is achieved during assembly.

[0058] The embodiments shown in the figures are merely examples, and individual parts of the devices shown can be combined with other devices to create further configurations. For example, in an alternative configuration, the Fig.The position shown in Figure 2 is not part of a rotary machine, but is intended to be stationary and / or attached to a linear transport system.

Claims

[1] Device for degassing and gassing containers (3), comprising a rotary conveyor (2) transporting the containers (3) with an axis of rotation (A) and a number N of positions (20) distributed over a circumference of the rotary conveyor (2), wherein at least one first connection opening (27) is provided at each position (20), wherein each position (20) is assigned a bell (22) sealingly closing the position (20), wherein the bell (22) is mounted displaceably in the vertical direction and can be raised or lowered relative to the position for opening and closing the position (20), characterized by that the at least one first connection opening (27) is provided on a base (21) of the associated position (20), wherein an intermediate base (23) is provided on the base (21) of the position (20), which serves as a support surface for the container (3). [2] Device according to claim 1, characterized bythat coaxial with the axis of rotation (A) a radial rotary feedthrough (6) comprising a stator (60) and a rotary body (62) rotating with the rotary rotor (2) and surrounding the stator (60) is provided for gas discharge or gas supply at the first connection opening (27), [3] Device according to claim 2, characterized bythat the rotary body (62) of the radial rotary feedthrough (6) has N channels (620) which radially penetrate the rotary body (62) and are each assigned to a position (20) and are fluidically connected to the first connection opening (27) of this position (20), and wherein the stator (60) has at least one connection opening (600) for connection to a gas outlet or gas supply and at least one channel (601) which is fluidically connected to the at least one connection opening (600) and opens circumferentially for gas passage to at least one of the channels (620) of the rotary body (62), wherein preferably the at least one channel (601) of the stator (60) has an opening (602) extending circumferentially along a circular arc, via which the at least one channel (601) of the stator (60) is connected to at least two, preferably more than two, channels (620) of the rotary body (62) for gas passage. [4] Device according to claim 2 or 3, characterized by that at least one first connection opening (27) and one second connection opening (28) are provided for gas exchange at each position (20), wherein an axial rotary feedthrough (7) is assigned to the second connection opening (28), wherein the axial rotary feedthrough (7) preferably comprises a rotary disk (70) rotating with the rotary rotor (2) and a stator disk (72), wherein the rotary disk (70) N has channels (700) axially penetrating the rotary disk (70) and are fluidically connected to the second connection openings (28), and wherein the rotary disk (70) and the stator disk (72) are arranged coaxially and axially next to one another. [5] Device according to claim 4, characterized byin that the rotary body (62) and the rotary disk (70) are coupled for rotation transmission, wherein the rotary body (62) has connecting pieces (67) which open into channels (670) which each have a section which is aligned with the channels (700) which axially pass through the rotary disk (70), wherein the channels (700) of the rotary disk (70) are fluidically connected to the second connection openings (28) by means of the rotary body (62). [6] Device according to claim 5, characterized by that a sleeve (74) rotating with the rotating body (62) and the rotating disc (70) is provided between the rotating body (62) and the rotating disc (70). [7] Device according to claim 5 or 6, characterized bythat detachable shaft coupling elements are provided between the rotating body (62) and the rotating disc (70) or between the rotating disc (70) and the sleeve (74) for repeated assembly and disassembly of the axial rotary union (7). [8] Device according to one of claims 5, 6 or 7, characterized by that the axial rotary union is arranged below the radial rotary union, with media being supplied or removed from the axial rotary union from below and media being supplied or removed from the radial rotary union from above. [9] Device according to one of claims 5 to 8, characterized by that at least one vacuum pump, preferably several vacuum pumps, is / are connected to the stator disk of the axial rotary union.

Images