EP0507294A1 - Arrangement for cleaning and degreasing of work pieces - Google Patents

Abstract

The arrangement for cleaning and degreasing workpieces essentially comprises a component-feed system (20) which is constructed in a cage-like manner and is arranged inside the closed chamber (10) so as to rotate about the central axis (0). A container (50), or a work piece carrier instead, is inserted into the component-feed system (20) in order to receive bulk material or loose individual components. The container (50) can be flooded with cleaning fluid via flooding pipes (25). A spray cleaning unit (30) via whose nozzle pipes (34), distributed over the circumference, cleaning fluid can be applied under spray pressure is arranged coaxially with respect to the component-feed unit (20). The spray cleaning unit can also be offset in rotational movement about the common axis (0) in any desired direction. <IMAGE>

Description

The invention relates to a system for cleaning and degreasing workpieces of different types, preferably using an aqueous cleaning liquid. Such cleaning systems or apparatuses are required for both manufacturing and service companies for cleaning workpieces from simple to very complex geometries. The workpieces can be present as individual parts or as bulk goods.

As far as impact and / or position-sensitive individual parts are to be cleaned, this is usually done with immersion cleaning systems, in which the workpiece is immersed in a container filled with a cleaning liquid or a container holding the workpiece is flooded with the cleaning liquid. In addition, various spray or spray cleaning systems are known.

From DE 35 19 757 A1, for example, a chamber cleaning machine is known, in which the small components to be cleaned are introduced into a cleaning chamber by means of a basket trolley, in which, above the basket trolley, z. B. also in household machines known manner, a circumferential nozzle tube is arranged with downward spray nozzles.

Such a machine is not suitable for cleaning complicated workpieces and in particular for cleaning tightly packed bulk goods.

The cleaning system known from US Pat. No. 4,370,992 is more suitable for this application, in which a drum is rotatably arranged in a closed chamber, in which the containers holding the bulk material can be inserted. Above the revolving drum, nozzle pipes are arranged, through whose nozzles directed towards the drum the cleaning liquid is blasted for the purpose of spray cleaning.

This cleaning system does not guarantee optimal cleaning, particularly in the case of workpieces of complex construction, in particular if an aqueous cleaning liquid is used while avoiding aggressive chemicals.

Another cleaning system is known from FR 2 597 767 A1, in which the workpiece is rotatably held in a housing and the cleaning liquid is supplied via radial distributor pipes from axially parallel nozzle pipes to which several nozzles are attached. With this cleaning system, complicated workpieces cannot yet be optimally cleaned. In addition, the loading is not very advantageous because of the workpiece carrier attached to the housing door.

The present invention proceeds in its construction a cleaning system of the type known from FR 2 597 767 A1, the features of which are common to the invention and are specified in the preamble of claim 1.

In order to avoid the disadvantages explained in the introduction and to solve the stated problem in such a system, the drive of the spray cleaning unit and parts loading unit specified in the characterizing part of claim 1 is proposed.

In order to be able to clean individual parts or bulk goods with the same system, the parts loading unit according to claim 2 is proposed, which can advantageously be flooded with flood pipes according to claim 3. Such a system is universal for various cleaning tasks such as Spray, flood and immersion cleaning can be used.

To clean a position-sensitive workpiece, a workpiece carrier floor can be inserted into the parts loading unit, which is stationary in this case, while the spray cleaning unit performs a rotational movement around the parts loading unit while dispensing the cleaning liquid.

For flood cleaning there is the possibility of flooding an optionally perforated container inserted into the parts loading unit via several flood tubes. If containers with a closed or only slightly perforated wall are used, the detergent can also be used for a longer period after immersion cleaning.

If loose, shock-resistant individual parts can also be cleaned in the form of bulk goods, they can be placed in a container perforated walls and lid are introduced and this is inserted into the parts loading unit, which in turn is set in rotary motion.

According to claim 4, this parts loading unit is designed in the manner of a cage, so that the jets of the rotating spray cleaning unit strike the workpiece to be cleaned or the container at different angles.

Construction details for the construction of the cage-like parts loading unit are given in claims 5 to 7. Claim 8 relates to an appropriate arrangement of the flood pipes.

Measures and features for the central supply of the spray cleaning unit and parts loading unit via the common connecting pipe are the subject of claims 9 to 11.

The structural design of the drives for the parts loading unit and the spray cleaning unit and their storage within the chamber are specified in claims 12 to 18. Further construction details are the subject of claims 19 and 20.

The invention proposes a very variable cleaning system which enables both spray cleaning in a permanently rotating system and flood cleaning, the workpieces to be cleaned being able to be present both in the form of individual parts and in batches. This creates all the prerequisites for the best possible cleaning results, even on a water chemical treatment basis achieve so that a consistently environmentally friendly concept can be realized with the system according to the invention. Despite the increasing variety of parts, almost all cleaning and degreasing problems can be solved in the industrial and craft sector.

A particular advantage is that the usable space of the system according to the invention can be designed both for workpiece carriers and for Euro standard containers with the dimensions 600 x 400 x 280 mm. Both closed and open-walled containers can be used, depending on the drive of the parts loading unit.

• 1. Permanent rotierende Spritzreinigungseinheit mit stationärem Teilebeschickungssystem.
• 2. Permanent rotierende Spritzreinigungseinheit mit gegenläufig rotierendem Teilebeschickungssystem.
• 3. Direktflutung des Behälters bei stationärem Teilebeschickungssystem.
• 4. Direktflutung des Behälters im Impulsverfahren mit anschließend rotierendem Teilebeschickungssystem.
• 5. Permanent rotierende Spritzreinigungseinheit mit überlagerter Direktflutung mit oder ohne rotierendem Teilebeschickungssystem.

Despite the universal application possibilities, the system according to the invention is still so compact that it can, if necessary, be constructed as a mobile unit. Depending on the control of the drives and the cleaning liquid inflow, the system according to the invention can be operated as follows:

• 1. Permanently rotating spray cleaning unit with a stationary parts loading system.
• 2. Permanent rotating spray cleaning unit with counter rotating parts loading system.
• 3. Direct flooding of the container with a stationary parts loading system.
• 4. Direct flooding of the container using the pulse method with a rotating parts loading system.
• 5. Permanent rotating spray cleaning unit with superimposed direct flooding with or without rotating parts loading system.

Figur 1

schematische Frontansicht der Reinigungs- und Entfettungsanlage gemäß der Erfindung in Richtung des Pfeiles I in Figur 2 gesehen, jedoch ohne Frontverkleidung und Ring 22 und mit eingesetztem Behälter,

Figur 1a

schematische Frontansicht eines zweiten Ausführungsbeispieles der Reinigungs- und Entfettungsanlage in Richtung des Pfeiles I in Figur 2a gesehen, jedoch ohne Frontverkleidung und Ring 22 mit eingesetztem Behälter,

Figur 2

Schnitt längs der Linie II-II in Figur 1 mit entferntem Behälter bzw. Werkstückträgerboden,

Figur 2a

Schnitt längs der Linie II-II in Figur 1a mit entferntem Behälter bzw. Werkstückträgerboden und abgehobenem Deckel,

Figur 3

Schnitt längs der Linie III-III in Figur 2,

Figur 3a

Schnitt längs der Linie III-III in Figur 2a,

Figur 4

vergrößerter Schnitt längs der Linie IV-IV in Figur 3 und

Figur 4a

vergrößerter Schnitt längs der Linie IV-IV in Figur 3a.

The object of the invention is explained below with reference to two preferred exemplary embodiments, which are shown in the drawing. The drawing shows:

Figure 1

2 shows a schematic front view of the cleaning and degreasing system according to the invention in the direction of arrow I in FIG. 2, but without front cladding and ring 22 and with the container inserted,

Figure 1a

2 shows a schematic front view of a second exemplary embodiment of the cleaning and degreasing system in the direction of arrow I in FIG. 2a, but without the front cladding and ring 22 with the container inserted,

Figure 2

Section along the line II-II in Figure 1 with the container or workpiece carrier floor removed,

Figure 2a

Section along the line II-II in Figure 1a with the container or workpiece carrier bottom removed and the lid removed,

Figure 3

Section along the line III-III in Figure 2,

Figure 3a

Section along the line III-III in Figure 2a,

Figure 4

enlarged section along the line IV-IV in Figure 3 and

Figure 4a

enlarged section along the line IV-IV in Figure 3a.

A first exemplary embodiment shown in FIGS. 1, 2, 3 and 4 is explained in more detail below. The system for cleaning and degreasing workpieces according to the invention, as illustrated with FIG. 1, is accommodated in a closed chamber 10 which is placed on a base cabinet 60. The base cabinet 60 comprises a collecting container 62 with bath care devices for the cleaning liquid, which are not shown in detail. A control cabinet 61 accommodating the control is attached to the chamber 10. The cleaning liquid applied in the chamber 10 is essentially collected by the baffle plate 12 and passed through the outlet 19 into the collecting container 62.

In the system shown in FIG. 1, the workpieces or the like (not shown) to be cleaned are located in a container 50, which preferably has the size of a Euro standard container of 600 x 400 x 280 mm. The walls of the container 50 and its cover 51 inserted in a receptacle 24a (see FIGS. 2 and 3) are perforated so that cleaning fluid can penetrate into the interior of the container.

The container 50 is part of a parts loading unit 20 which surrounds the container 50 in a cage-like manner and can be rotated about the central axis 0.

The parts loading unit 20 is in turn surrounded by a spray cleaning unit 30, via whose nozzles 34a attached to nozzle tubes 34, cleaning liquid can be sprayed off in the direction of the container 50, as with the Rays S is indicated. This spray cleaning unit 30 can also be rotated about the central axis 0. By relative movement of the parts loading unit 20 and the spray cleaning unit 30, an optimal spray or spray cleaning can be realized.

In addition, it is possible to flood the interior of the container 50, which in this case is stationary, with cleaning liquid. For this purpose, flood pipes 25 are arranged integrated with the guide rails 24 of the parts loading unit 20 above the top opening of the container 50, through whose downwardly directed outlets 25 a cleaning liquid can be applied, as indicated by the arrows F. Closed-walled containers 50 or those with fine perforations are expediently used for flood cleaning.

Since both the parts loading unit 20 and the spray cleaning unit 30 can be rotated and both units have to be continuously supplied with cleaning liquid, special measures for the drive and cleaning liquid supply are necessary, as is illustrated by the other figures.

For the sake of clarity, the container 50 with its cover 51 outside the chamber 10 is shown in FIG. According to the intended purpose, after filling with the workpieces to be cleaned, which may also be in the form of bulk material, it is to be moved into the parts loading unit 20 in the direction of arrows a on the rails designed as roller conveyor 23 with rollers 23a. If larger and / or shock-sensitive workpieces are to be cleaned, These can be fastened to the workpiece carrier base 52 with the aid of fastening means (not shown) and introduced into the parts loading unit 20 instead of the container 50.

The lower rails designed as roller conveyor 23 and the upper rails 24, as can be seen in the view in FIG. 1, are arranged in the corner regions of the container 50 and are designed in such a way that the container is completely rotated through an angle of 360 ° even when the parts loading unit 20 is rotated is secured. The perforated container 50 can be closed at the top by an appropriately likewise perforated cover 51 which can be inserted into the cover receptacle 24a of the guide rails 24 and secured therein.

As illustrated in FIG. 2, the roller conveyors 23 and the guide rails 24 are connected on the drive side to a disk-shaped holder 21 and on the opposite side to a ring 22, through which the container 50 or the workpiece carrier base 52 is inserted. Since the parts loading unit 20 is thus cage-like, it is possible to apply cleaning liquid to the workpieces to be cleaned in almost any position, which is injected via the nozzle pipes 34 with their nozzles 34a. The cleaning liquid is supplied via the central connecting pipe 40, which, as will be explained with reference to the other figures, also serves as the drive shaft for the parts loading unit 20. At its end located inside the chamber 10, the connecting pipe 40 is connected in a rotationally fixed manner to the holder 21 by means of a connecting flange 27. Radially extending channels 26 are incorporated into the holder 21, which are connected at one end to outlet openings 47 of the connecting pipe 40 and at the other end to the flood pipes 25, which are arranged inside the guide rails 24 and whose flood pipe outlets 25a are located above a container 50 to be inserted into the parts loading unit 20. This allows the container 50 to be flooded with cleaning liquid, provided that the connecting pipe 40 is closed at its end in the chamber with the shorter screw plug 42.

The spray cleaning unit 30 is supplied with its nozzle pipes 34, the nozzles 34a of which are directed radially inward, via the same connecting pipe 40. For this purpose, the connecting pipe has a number of outlet openings 41 distributed over the circumference of the pipe and via which the distributor pipes 32 of the spray cleaning unit 30 can be supplied with cleaning liquid. These distributor pipes in turn open into a distributor ring 33, in which the above-mentioned nozzle pipes 34 are inserted at an angle of 90 °. In order to ensure that the spray cleaning unit 30 can be rotated relative to the parts loading unit 20 while simultaneously being loaded with cleaning fluid, the distributor pipes 32 are inserted into bores 37 of a hub 31 rotatably mounted on the connecting pipe 40, the bores 41 of the connecting pipe 40 and the bores 37 of the hub 31 , in which the distributor pipes 32 are inserted, open into a common, internal annular groove 36. This annular groove 36 ensures a uniform supply of cleaning fluid even when the spray cleaning unit 30 is rotating.

If the device according to the invention is to be used for immersion cleaning, it suffices to place one in the parts loading unit To flood 20 inserted and in this case closed-walled containers via the flood pipes 25, while in this case the spray cleaning unit 30 does not have to be charged with cleaning liquid. In order to be able to achieve this without using control valves, the supply ducts and pipes for the flooding are dimensioned in comparison with those for the spray cleaning in such a way that they offer a lower flow resistance. For this purpose, the cross sections of the channels 26 and the flood pipes 25 and the diameters of the outlet openings 47 and the flood pipe outlets 25a are dimensioned much larger than the cross sections of the distributor pipes 32, the nozzle pipes 34 and the nozzles 34a and the bores 37. According to the smallest principle According to Le Chatelier, the hydraulic system pressure that occurs in this distribution system is reduced in the flood cleaning system, so that practically no cleaning liquid is dispensed from the nozzles 34a of the spray cleaning unit.

On the other hand, if spray cleaning is to be carried out, only the entrances to the channels 26 have to be closed. The longer screw plug 43, which is used instead of the screw plug 42 in the connecting pipe 40, serves this purpose. In this case, the cleaning liquid is forcibly passed through the connecting pipe 40, the outlet openings 41, the annular groove 36, the distributor pipes 32, the distributor ring 33 and the nozzle pipes 34 to the spray nozzles 34a, via which the cleaning material can be supplied with cleaning liquid from all directions.

The direction of flow of the cleaning liquid is indicated in FIG. 4 by arrows b.

The central supply of the cleaning liquid via the connecting pipe 40, which also serves as the drive shaft, requires an exact and stable rotary mounting of the parts loading unit 20 and the spray cleaning unit 30 in view of the not inconsiderable torques.

As can be seen above all from the enlarged illustration in FIG. 4, the hub 31, which is connected in a rotationally fixed manner to the spray cleaning unit 30, is slidably mounted in a slide bearing ring 14 which is attached to the chamber wall 13. To further support the spray cleaning unit 30, support rollers 11 (see FIGS. 1 and 3) are provided within the cleaning chamber 10, on which the distributor ring 3 rests with its circumferential surface in a rolling manner.

The connecting tube 40, which acts as the drive shaft for the parts loading unit 20, is mounted within the hub 31 with deep-groove ball bearings 38 arranged at an axial distance from one another. Further storage is provided on the distributor ring 33 of the spray cleaning unit 30, roller bearings 35, the rollers 35a of which bear against the circumferential surface of the holder 21 and are mounted on an axis 35b which are carried by carriers 35c fastened to the distributor ring 33. As the top view in FIG. 1 shows, three such roller bearings 35 are attached to the distributor ring 33 equidistantly from one another. In all roller bearings 35, the axis 35b is mounted eccentrically between the supports 35c, so that any radial play in the bearing during assembly or maintenance can be compensated for by rotating the axis.

The electric drive 17 attached to the chamber wall 13 (cf. FIG. 2), the motor pinion 17a of which is via a transmission gearwheel 18, serves to rotate the parts loading unit 20 is in gear connection with the drive pinion 49, which is fixed on the connecting tube 40 with the aid of a hub shaft tensioning set 45, 46.

The spray cleaning unit 30 is driven by the second electric motor 15 fastened to the upper part of the chamber wall 13, the motor pinion 15a of which is in transmission connection with the drive pinion 39, which is firmly connected to the hub 31, via the transmission gearwheel 16.

The drive motors 15 and 17 as well as pumps (not shown in detail) and, if appropriate, devices for checking and maintaining the cleaning liquid are controlled by control and regulation devices housed in the control cabinet 61 or monitored with suitable measuring devices.

The supply of cleaning liquid, the z. B. is pumped out of the container 62 by means of circulating pumps, takes place via a line, not shown, which is fluid-tight but rotatably connected to the inlet pipe 44 of the connecting pipe 40.

A second exemplary embodiment shown in FIGS. 1a, 2a, 3a, 4a is explained in more detail below. The second exemplary embodiment corresponds to the first in terms of structure and mode of operation. For this reason, only the changes and the improvements achieved with them are described below. The parts that are the same as in the first exemplary embodiment have the same numbering.

In the second embodiment, the baffle 12 is no longer present. It is through a whole spout 19 covering filter level not shown in the drawing replaced. The cleaning liquid applied in the chamber 10 is cleaned by this filter level and passes through this into the collecting container 62.

The lid 51 can expediently be lowered into the container 50. This ensures that when the container 50 rotates, the loose workpieces within the component assembly unit 20 are largely fixed and are not damaged. The lid has a device, not shown in the drawing, which allows it to be secured within the container.

In the second embodiment, the annular holder 21 is completely omitted. The spatial arrangement of the two flood pipes 25 with the guide rails 24 has remained the same. The cleaning liquid is supplied to the flood pipes 25 via a radial supply line 121, which is attached above the outlet opening 47 of the connecting flange 127 and which branches at the other end in a T-shape and the two ends of the T-shaped branch with the flood pipes 25 connects. On the side opposite the radial feed line 121, a further radially extending tube 121a is attached to the connecting flange 127, which also branches out in a T-shape and which serves as a holder for the roller conveyor 23. In the first exemplary embodiment, the connecting pipe 40 is closed at its end located in the chamber with two screw plugs 42 and 43, respectively. In the second embodiment, these two locking screws are replaced by a single selective locking screw 143. This selector screw 143 is milled semicircular in the middle. With the help of this selector screw 143, the outlet opening 47 either close or release so that the cleaning liquid reaches the radial pipe 121 and the flood pipes 25 via the connecting pipe 40.

In this second embodiment, the distributor ring 33 is completely absent. The distributor pipes 32 are no longer connected to the distributor ring 33 but directly to the nozzle pipes 34 via a 90 ° elbow.

The storage of the parts loading unit 20 and the spray cleaning unit 30 in the second exemplary embodiment is advantageously relocated to the outer area of the housing. This means that the bearings do not come into contact with the cleaning fluid. As can be seen above all from the enlarged illustration in FIG. 4 a, the hub 131, which is connected to the spray cleaning unit 30 in a rotationally fixed manner, is mounted in a bearing hub 114 which is attached to the chamber wall 13. This bearing hub 114 is designed as a roller bearing hub with the roller bearing 135 attached to the circumference and its associated roller axis 135a. The connecting tube, which acts as a drive shaft for the parts loading unit 20, is mounted within the hub 131 with slide bearings 138 arranged at an axial distance from one another.

The rotary drive of the parts loading unit 20 is provided by the electric motor 17 attached to the chamber wall 13 (cf. FIG. 2a), the motor pinion 17a of which is connected to the drive pinion 49 via a transmission element 118, which sits on the connecting pipe 40 and has a feather key connection.

The second electric motor 15 fastened to the upper part of the chamber wall 13 serves to drive the spray cleaning unit 30, which is in gear connection from the motor pinion 15a via the transmission element 116 to the drive pinion 39, which is fixedly connected to the hub 131.

The power transmission from the two electric motors 15 and 17 to transmission elements 116 and 118 takes place via gear drive, chain drive or the like.

Reference symbol list

10th

Cleaning chamber

11

Support roller

12

Baffle

13

Chamber wall

14

Plain bearing ring

114

Bearing hub

15

Drive motor

15a

Motor pinion

16

Transmission gear

116

Transmission element

17th

Drive motor

17a

Motor pinion

18th

Transmission gear

118

Transmission element

19th

Spout

20th

Parts loading unit

21

bracket

121

radial feed line

121a

pipe

221

bracket

22

ring

23

Roller conveyor

23a

roll

24th

Guide rail

24a

Cover holder

25th

Flood pipe

25a

Flood pipe outlet

26

channel

27th

Connecting flange

127

Connecting flange

30th

Spray cleaning unit

31

hub

131

hub

32

Manifolds

33

Distribution ring

34

Nozzle pipe

34a

jet

35

Roller bearings

35a

roll

135

Roller bearings

135a

Roller axis

35b

Roller axis

35c

carrier

36

Ring groove

37

drilling

38

Deep groove ball bearing

138

warehouse

39

Drive pinion

40

Connecting pipe

41

Outlet opening

42, 43

screw plugs

142

Locking screw

44

Inflow connection

45, 46

Hub shaft clamping set

47

Outlet opening

49

Drive pinion

50

container

51

cover

52

Workpiece carrier floor

60

Base cabinet

61

switch cabinet

62

container

0

Central axis

S, F

Symbols for cleaning liquid jets

a

Direction of insertion for container 50 and lid 51

b

Flow direction of the cleaning liquid

Claims (20)

System for cleaning and degreasing workpieces, preferably with an aqueous cleaning liquid, consisting of a closed chamber, a workpiece holder rotatably arranged in the chamber, a spray cleaning unit that can be rotated around the axis of rotation of the workpiece holder, and several axially parallel nozzle pipes with spray nozzles directed towards the workpiece and used for spray cleaning The cleaning liquid can be supplied via radial distributor pipes which are connected to a coaxial connecting pipe, characterized in that the coaxial connecting pipe (40) serves as an axis for the spray cleaning unit (30) and as a drive shaft for the workpiece holder and that the workpiece holder and the spray cleaning unit (30) can each be driven in the same or in opposite directions by a motor. System according to Claim 1, characterized in that the workpiece carrier is designed as a parts loading unit (20) into which a container (50), which may be wholly or partly perforated, can be used to hold loose individual parts or bulk goods. System according to claim 2, characterized in that the parts loading unit (20) above the container (50) has flood pipes which are connected to the connecting pipe (40) via approximately radially extending feeders (26, 121). System according to claim 2 or 3, characterized in that the parts loading unit (20) has, in the manner of a cage, axially parallel rails (24, 23) which are arranged above and below or to the side of the container (50) which can be inserted between them. System according to claim 4, characterized in that the rails (24, 23) are each fastened to a holder (21, 212) on the drive side of the parts loading unit (20) and to a ring (22) on the loading side. System according to claim 4 or 5, characterized in that the rails supporting the container (50) from below are designed as roller tracks (23). System according to claim 4, 5 or 6, characterized by devices for fixing the container lid. Installation according to one of the preceding claims, characterized in that the flood pipes (25) are integrated in the rails (24). System according to one or more of claims 1 to 8, characterized in that the connecting pipe (40) has an axially open inlet connection (44) and radial outlet openings (41, 47) which are arranged one behind the other in the axial direction and into the distributor pipes (32 ) of the spray cleaning unit (30) and the feeds (26, 121) of the parts loading unit (20) open out. Installation according to claim 9, characterized in that the effective cross section of the flood pipes (25) with their outlets (25a), the channels (26) and the connecting pipe outlet openings (47) assigned to them is larger than that of the nozzle pipes (34) with their nozzles ( 34a), the distributor pipes (32) and the associated connecting pipe outlet openings (41). System according to Claim 10, characterized in that the connecting pipe outlet openings (47) supplying the flood pipes (25) can preferably be closed by means of a screw plug (43, 142) which can be inserted into the connecting pipe (40). System according to one or more of claims 1 to 11, characterized in that the connecting pipe (40), which is connected with its end located inside the chamber (10) in a rotationally fixed manner to the parts loading unit (20), has a outside of the chamber (10) A drive motor (17) has a drive pinion (49) in gear connection and an inflow nozzle (44) which can be rotated but connected in a liquid-tight manner to a feed pipe. System according to claim 12, characterized in that a hub (31, 131) is rotatably arranged coaxially on the connecting pipe (40) and has bores (37) opposite the outlet openings (41) of the connecting pipe (40) within the chamber (10) , in which the distributor pipes (32) of the spray cleaning unit (30) are inserted, and that outside the chamber (10) on the hub (31) a drive pinion (39) is seated with a drive motor (15) is in gear connection. System according to Claim 13, characterized in that the hub (31) has an annular groove (36) on the lateral surface facing the connecting pipe (40), into which the outlet openings (41) of the connecting pipe (40) and the distributor pipes (32) of the spray cleaning unit (30) flow out. System according to Claim 12, 13 or 14, characterized in that at least one bearing, preferably two bearings (38, 138), are arranged at a distance from one another between the hub (31, 131) and connecting pipe (40) and in that the hub (31) in a bearing (14, 114) provided on the chamber wall (13) is mounted. System according to claim 15, characterized in that the holder (21) of the parts loading unit (20) is supported with its peripheral surface in a rolling manner on roller bearings (35) which are distributed over the periphery and which are attached to the distributor ring (33). Installation according to claim 16, characterized by three approximately equidistantly arranged roller bearings (35) which are radially adjustable with respect to the axis of rotation. Installation according to one or more of claims 1 to 17, characterized in that the distributor pipes (32) of the spray cleaning unit (30) are connected to the nozzle pipes (34) via a distributor ring (33) which is in the chamber (10) with its Supported peripheral surface on support rollers (11). Installation according to one or more of claims 1 to 18, characterized in that a filter level is attached above the container (62). System according to one or more of claims 1 to 19, characterized in that the cover (51) can be lowered and fixed in the container (50).

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