CLEANING NOZZLE FOR A FILLING SYSTEM AND METHOD FOR MOUNTING A CLEANING NOZZLE

Description

Technical field

[0001] The present invention relates to a cleaning nozzle for applying a cleaning fluid to surfaces to be cleaned of a filling system which is used for filling a filling material into containers, as well as to a method for assembling such a cleaning nozzle. State of the art

[0002] It is common practice in bottling plants to fill containers with a wide variety of products, such as beverages or other foodstuffs. In the same bottling plant, different products in different quantities are filled in different batches. During the filling of a batch, the product may spill or overflow from the container, or if the container is defective, some or all of the container contents may escape and come into contact with the surfaces of the filling plant. During the filling of a batch, this is not necessarily critical, as the leaked product corresponds to the product just filled, which is why there is no mixing of different products. For example, during a bottling batch of beer, it is not necessarily critical if overflowed beer comes into contact with surfaces of the bottling plant.

[0003] However, it is known that the filling system should be cleaned when changing the filling product and / or at regular intervals and / or after maintenance stops. In addition to the product-carrying lines, this includes cleaning the surfaces of the filling system.

[0004] Cleaning nozzles are used to clean the surfaces of the filling system. These nozzles apply a cleaning medium to the surfaces to be cleaned. The cleaning nozzles are connected to a cleaning fluid reservoir in the filling system via appropriate cleaning fluid lines. This ensures their supply with the cleaning fluid.

[0005] The cleaning nozzles known to date and their spray position in the filling system can only be adjusted with great effort, or a large number of different cleaning nozzles are necessary in order to cover all possible applications.

[0006] US 2009 / 0206180 A1 and US 2007 / 0011805 A1 describe adjustable shower heads. Description of the invention

[0007] Based on the known prior art, it is an object of the present invention to provide an improved cleaning nozzle for applying a cleaning fluid to surfaces of a filling system to be cleaned and an improved method for assembling a cleaning nozzle.

[0008] The object is achieved by a cleaning nozzle having the features of claim 1. Advantageous further developments emerge from the subclaims, the description and the figures.

[0009] Furthermore, the object is achieved by a method having the features of claim 7. Advantageous further developments thereof emerge from the subclaims, the description and the figures.

[0010] Accordingly, a cleaning nozzle for applying a cleaning fluid to surfaces to be cleaned in a filling system for filling a filling material into containers is proposed.

[0011] The cleaning nozzle has an inner sleeve for guiding the cleaning fluid and for connection to a cleaning fluid reservoir at a connection end of the cleaning nozzle. The inner sleeve can be substantially cylindrical, wherein this substantially cylindrical design can also include the formation of a shoulder for an axial stop. Its diameter can be small compared to its length. Likewise, the inner sleeve can have a small wall thickness compared to its diameter. The inner sleeve can be connected to the cleaning fluid reservoir with the interposition of cleaning fluid lines. The inner sleeve can be coupled to the filling system or the cleaning fluid lines via a screw, plug, or press connection. The connection end of the cleaning nozzle can be the area intended for coupling to the filling system or the cleaning fluid lines.

[0012] The cleaning nozzle has an outer sleeve that is arranged at least partially outside the inner nozzle, forming a gap. The gap can be a volume that is bounded on the inside by the inner sleeve and on the outside by the outer sleeve. The outer sleeve can be pushed, plugged, and / or screwed onto the inner sleeve. The inner sleeve or a component connected to the inner sleeve can form a shoulder that represents an axial stop for the outer sleeve.

[0013] The inner sleeve has at least one inner sleeve opening for the passage of the cleaning fluid from an interior space into the intermediate space. The volume of the interior space can be larger than that of the intermediate space. The at least one inner sleeve opening can be arranged in the lateral surface of the inner sleeve. The position of the inner sleeve opening can be selected such that it promotes the passage of the cleaning fluid into the intermediate space. The inner sleeve can have a plurality of inner sleeve openings. For example, a plurality of circular bores can be arranged along the longitudinal axis of the inner sleeve. The circular bores can have the same diameter or, alternatively, have diameters that vary from one another, for example, alternating diameters. If the inner sleeve has a plurality of inner sleeve openings, these can have the same orientation relative to one another, so that each individual inner sleeve opening points in the same direction.In the present disclosure, the orientation of an opening or a component is understood to mean the orientation in space, in particular in the circumferential direction of the longitudinal axis of the cleaning nozzle. If the inner sleeve openings have the same orientation relative to one another, this allows the cleaning fluid to pass from the interior of the inner sleeve into the intermediate space at a constant position in the circumferential direction of the cleaning nozzle. Thus, it is possible to clearly determine at which point in the circumferential direction of the cleaning nozzle the cleaning fluid passes into the intermediate space.

[0014] The outer sleeve has at least one outlet opening for applying the cleaning fluid to the surface of the filling system to be cleaned. The at least one outlet opening can be arranged in the outer surface of the outer sleeve. The position of the outlet opening can also be selected such that it promotes the discharge of the cleaning fluid from the intermediate space onto the surfaces of the filling system to be cleaned. The outlet opening can be the only opening that allows the cleaning fluid to escape from the intermediate space when installed.

[0015] According to the present invention, the position of the outlet opening of the outer sleeve is adjustable independently of the position of the inner sleeve opening. This allows the position of the outlet opening to be adjusted even if the position of the inner sleeve opening is already fixed. The position of the respective opening can describe the geometric location at which it is located in the respective sleeve. This position specifies the orientation of the respective opening. This makes it possible to vary the position of the outlet opening while the position of the inner sleeve opening is fixed in order to influence the direction of the cleaning fluid escaping or flowing out. This allows the orientation of a cleaning fluid jet leaving the cleaning nozzle to be changed relative to the filling system while the position of the inner sleeve remains constant.

[0016] This allows for targeted cleaning of filling system surfaces. By adjusting the position of the outlet opening relative to the position of the inner sleeve opening, cleaning requirements between different batches in a filling system can be met in a time-efficient and low-maintenance manner. This simplified adjustability results in improved cleaning, which is microbiologically safer and requires less installation space.

[0017] According to the invention, the outer sleeve has at least a first attachment with a first outlet region as part of the outlet opening and a second attachment with a second outlet region as part of the outlet opening, wherein the position of the first attachment is adjustable independently of the position of the second attachment. The outer sleeve can thus be composed of several attachments and thus achieve increased adjustability of the cleaning nozzles and thus of the cleaning fluid jet. The individual attachments can be designed separately from one another in terms of material. In this case, the outlet opening has a first outlet region and a second outlet region. The cleaning fluid that has passed from the interior of the inner sleeve into the intermediate space can therefore exit the outer sleeve from two outlet regions.The cleaning fluid jet can thus be divided into two jet areas: the first jet area exiting the first exit area and the second jet area exiting the second exit area. The first attachment can be adjusted so that the first jet area hits a designated first cleaning surface of the filling system, while the second attachment can be adjusted so that the second jet area hits a designated second cleaning surface of the filling system. It may be possible to adjust the position of the first attachment independently of the position of the second attachment. This also allows the first jet area to be adjusted independently of the second jet area, which increases adjustability.In terms of their design, shape and length, the first and second attachments can be identical, with the exception of the first and second outlet areas, which increases the modularity of the cleaning nozzles. This allows at least two attachments, for example from a selection of different attachments, to be mounted on an inner sleeve, thus enabling the adaptability to changing environmental conditions.

[0018] In a further embodiment, the outer sleeve has a third attachment with a third outlet region as part of the outlet opening, wherein the position of the third attachment is preferably adjustable independently of the position of the first and / or the second attachment. The outer sleeve can thus be composed of three attachments, and consequently the adjustability of the cleaning nozzles and thus of the cleaning fluid jet can be increased. In this case, the outlet opening has a first outlet region, a second outlet region, and a third outlet region. Analogous to the above in connection with the embodiment with two attachments, the cleaning fluid jet can thus be divided into three jet regions.Alternatively, the third attachment can also be designed such that the cleaning fluid exits primarily from the first and second outlet areas, so that the cleaning fluid jet continues to be divided only into the first jet area and the second jet area. This can be achieved, for example, by dimensioning the third outlet area, which can be smaller than the first and second outlet areas. It may be possible to adjust the position of the third attachment independently of the position of the first attachment and / or the position of the second attachment.

[0019] The third attachment can be a drainage attachment, so that the third outlet area has the same orientation as the at least one inner sleeve opening to enable the cleaning fluid to drain completely out of the cleaning nozzle. The same orientation of the third outlet area to the inner sleeve opening can be ensured by centering the third attachment on the inner sleeve. This eliminates the risk of cleaning fluid remaining in the gap or in the interior after the cleaning process has been completed. Complete draining means emptying the cleaning nozzles in such a way that no cleaning fluid remains in the cleaning nozzle, even when no more fluid pressure is applied to the cleaning fluid. The third attachment can be arranged on the cleaning nozzle in such a way that it ensures that the cleaning fluid drains out of the cleaning nozzle due to gravity.Because the orientation of the third outlet area matches the orientation of the inner sleeve opening, the cleaning fluid can flow out of both the interior and the intermediate space. The third outlet area can be a circular bore, the cross-section of which can be smaller than the first and second outlet areas. The first, second, and third attachments can each be sealed to one another. For example, an O-ring can be arranged between each attachment. Furthermore, the respective attachments can have a centering feature that facilitates attachment to the inner sleeve.

[0020] In a further embodiment, the cleaning nozzle can also be provided with only two attachments, wherein in this embodiment a first attachment provides an outlet area for the cleaning fluid in order to provide a corresponding cleaning effect on the respective system surfaces, and the second attachment is provided as a drainage attachment, by means of which an emptying of the intermediate space can be achieved after completion of the cleaning process.

[0021] In a further embodiment, an adjusting element can be coupled to the inner sleeve at the end of the inner sleeve facing away from the connection end, wherein a position of the outer sleeve that is fixed in an operating state can be adjusted in an assembled state independently of the position of the inner sleeve by means of the adjusting element. In the context of this disclosure, a fixed position is understood to mean that the position cannot be changed without the application of external force, for example by using a tool. The adjusting element can be screwed or plugged onto the inner sleeve. In this way, not only the position of the individual outlet areas, but the position of the outer sleeve as a whole can be adjusted independently of the inner sleeve. The adjusting element can cause a tension or a tension state between the inner sleeve and the outer sleeve, which guarantees their fixed position.

[0022] In a further embodiment, the position of the outer sleeve relative to the inner sleeve is adjustable exclusively in the circumferential direction of the cleaning nozzles in order to align the outlet opening relative to the inner sleeve opening. The axial position of the outer sleeve or of the individual attachments of the outer sleeve can thus be geometrically defined, for example via a shoulder of the inner sleeve, while the position in the circumferential direction of the cleaning nozzle is adjustable. The angle at which the cleaning fluid jet leaves the cleaning nozzles can thus be adjusted, while the axial position of the cleaning jet remains fixed. Furthermore, the adjusting element can be designed as a clamping nut, which, in the operating state, causes the inner sleeve to be clamped to the outer sleeve. The clamping between the two sleeves can mean that their position can no longer be changed without releasing the clamp.The clamping nut can be placed, preferably screwed, onto the inner sleeve in such a way that the individual attachments of the outer sleeve are positioned precisely relative to the inner sleeve. This allows the behavior of the cleaning nozzles or the cleaning fluid jet to be adapted to the prevailing environmental conditions. The position of the outer sleeve or the individual attachments of the outer sleeve can be geometrically defined in the axial direction, while being variable in the circumferential direction.

[0023] In a further embodiment, the inner sleeve opening has at least one slot-shaped opening and / or at least one circular opening. If the inner sleeve opening has more than one opening, these openings advantageously have the same orientation. Alternatively or additionally, the outlet opening can have at least one slot-shaped opening and / or at least one circular opening. If the outlet opening is composed of different outlet areas, these can also each be circular or slot-shaped.

[0024] In a further embodiment, the first exit region of the first attachment extends in the longitudinal direction and / or the circumferential direction of the first attachment. Alternatively or additionally, the second exit region of the second attachment can extend in the longitudinal direction and / or the circumferential direction of the second attachment. An elongated first or second jet region is achieved via an extension in the longitudinal direction. A pie-shaped first or second jet region is achieved via an extension in the circumferential direction. The extension in the circumferential direction can be from 5° to 90°, approximately 45°. The first and second exit regions can differ geometrically from one another, such that the first jet region has a different geometric shape than the second jet region.

[0025] The invention also relates to a method for assembling a cleaning nozzle according to the invention, which is intended for applying a cleaning fluid to surfaces to be cleaned in a filling system for filling a product into containers. The method comprises the following steps: Step 1: Coupling the inner sleeve to a cleaning nozzle coupling attachment of the filling system. The cleaning nozzle coupling attachment can be a standardized or custom-made part that establishes an operative connection between the cleaning fluid reservoir and the cleaning nozzle. The coupling can be positive, non-positive, and / or materially bonded, for example, by screwing, placing, or clamping. The inner sleeve can have a geometry complementary to that of the cleaning nozzle coupling attachment.

[0026] Step 2: Place the outer sleeve onto the inner sleeve so that the outer sleeve assumes a fixed position in the axial direction. To ensure that the outer sleeve assumes a fixed position in the axial direction, the inner sleeve can have a shoulder that serves as a stop for the outer sleeve. The attachment can be done by either slipping it on or clamping it on.

[0027] Step 3: Align the circumferential position of the outer sleeve relative to the inner sleeve. The outer sleeve can be rotated relative to the inner sleeve until the outlet opening is aligned so that it points toward the surfaces of the filling system to be cleaned. This allows for precise alignment of the cleaning nozzle or the cleaning fluid jet exiting the cleaning nozzle to the surfaces of the filling system to be cleaned without increased assembly effort. Steps 1 to 3 can be performed chronologically.

[0028] In one embodiment of the method, this comprises the step of coupling an adjusting element to the inner nozzle in order to create a clamped state of the outer sleeve in which the position of the outer sleeve relative to the inner sleeve is fixed. The coupling of the adjusting element can be positively, non-positively, and / or materially connected, for example, by screwing, placing, or clamping. The adjusting element can be a clamping nut. In the clamped state, the position of the cleaning nozzle and the orientation of the outlet opening are fixed and can only be changed after the clamped state has been released, for example, in an assembled state.

[0029] In one embodiment of the method, placing the outer sleeve onto the inner sleeve comprises the following steps: placing a first attachment of the outer sleeve onto the inner sleeve such that the first attachment assumes a fixed position in the axial direction; placing a second attachment of the outer sleeve onto the inner sleeve such that the second attachment assumes a fixed position in the axial direction. This enables a multi-part design of the outer sleeve and corresponding assembly. Alternatively or additionally, the method can also comprise placing a third attachment of the outer sleeve onto the inner sleeve such that the third attachment assumes a fixed position in the axial direction. This further increases the modularity of the cleaning nozzles without increasing the complexity of the assembly process.Aligning the position of the outer sleeve in the circumferential direction relative to the inner sleeve according to the method according to the invention can include aligning the first attachment and / or the second attachment and / or the third attachment. Thus, during assembly, the individual attachments are aligned in such a way that they achieve optimal cleaning of the surfaces to be cleaned in the operating state.

[0030] The method according to the invention can be directed to the assembly of the cleaning nozzles according to the invention. Against this background, individual features as well as effects and advantages disclosed in connection with the cleaning nozzle are also applicable to the method and vice versa, provided this is technically feasible in each case. Short description of the characters

[0031] Preferred further embodiments of the invention are explained in more detail by the following description of the figures. In the figures: Figure 1 shows a longitudinal section through a cleaning nozzle according to one embodiment; Figure 2 shows a perspective external view of the cleaning nozzle according to one embodiment; and Figure 3 shows a perspective view of a part of a filling system in which the cleaning nozzle according to this disclosure can be used. Detailed description of preferred embodiments

[0032] Preferred embodiments are described below with reference to the figures. Identical, similar, or equivalent elements in the various figures are provided with identical reference numerals, and a repeated description of these elements is partially omitted to avoid redundancies.

[0033] In Figure 1A schematic illustration of a cleaning nozzle 1 for applying a cleaning fluid to surfaces to be cleaned in a filling system is shown. The cleaning nozzle 1 has an inner sleeve 2, into which the cleaning fluid is fed from a cleaning fluid reservoir (not shown). At a connection end 3, the inner sleeve 2 can be connected directly or indirectly to the cleaning fluid reservoir. The connection end 3 is usually connected to the cleaning fluid reservoir via a cleaning fluid line.

[0034] An outer sleeve 5 is placed on the inner sleeve 2, forming an intermediate space 4. In the embodiment shown, the outer sleeve 5 has a first attachment 9, a second attachment 10, and a third attachment 13. The outer sleeve 5 rests against a shoulder 16 formed on the inner sleeve 2. In this way, the outer sleeve 5 is positionally defined in the axial direction.

[0035] Instead of the shoulder 16, a union nut (not shown here) can also form a support for the outer sleeve 5 at the connection end 3.

[0036] In this case, an O-ring 17 is arranged between the shoulder 16 and the outer sleeve 5 for sealing. The inner sleeve 2 has five inner sleeve openings in 6, which have the same orientation to one another. From the respective inner sleeve openings 6, the cleaning fluid can pass from an interior space 7 of the inner sleeve 2 into the intermediate space 4. For application of the cleaning fluid to the surfaces of the filling system to be cleaned, the cleaning fluid has to flow from the intermediate space 4 through an outlet opening 8, which in connection with Figure 2 described in more detail. The outer sleeve 5 is adjustable in its position, in particular in its circumferential orientation, independently of the position of the inner sleeve 2.

[0037] In Figure 1In the embodiment shown, the outlet opening 8 is not in the sectional plane of the inner sleeve openings 6. As already mentioned above and with reference to Figure 2 As described in more detail below, the outer sleeve 5 comprises a first attachment 9, a second attachment 10 and a third attachment 13.

[0038] The third attachment 13 has a third exit area 14. This has the same orientation as the inner sleeve openings 6. Consequently, it is shown in the section from Figure 1visible. The third attachment 13 is designed here as a drainage attachment. This ensures that any cleaning fluid located in the inner sleeve 2 or in its interior 7 exits through the third outlet area 14 even when there is little or no fluid pressure and thus does not remain in the cleaning nozzle 1. In other words, at the end of a cleaning process, all cleaning fluid can flow out of the cleaning nozzle 1 and, accordingly, no cleaning fluid can drip into the containers to be filled or the filled containers during subsequent production operation of the filling system.

[0039] At the end of the cleaning nozzle 1 facing away from the connection end 3, an adjusting element 15 is placed on the inner sleeve 2. The adjusting element 15 clamps the outer sleeve 5 or the attachments 9, 10, 13 forming the outer sleeve 5 such that they are fixed in position. Before the adjusting element 15 clamps the outer sleeve 5, the individual attachments 9, 10, 13 can be aligned. The third attachment 13, however, can have a centering device which ensures that the third outlet area 14 has the same alignment as the inner sleeve openings 6. An O-ring 17 can be arranged between the adjusting element 15 and the outer sleeve 5. Likewise, an O-ring 17 can be arranged between the individual attachments 9, 10, 13 in order to achieve a corresponding seal.

[0040] In further embodiments not explicitly shown here, only a first and a third attachment can be provided in order to achieve both a targeted application of the cleaning fluid to the system areas via the first attachment with corresponding outlet openings, but at the same time to achieve a drainage effect via the third attachment to empty the intermediate space after completion of the cleaning process.

[0041] In Figure 2A perspective view of the cleaning nozzle 1 is shown. Here, the individual outlet areas 11, 12 of the first attachment 9 and the second attachment 10 are visible. The first outlet area 11 of the first attachment 9 is designed here, for example, in the shape of a slot over a section of 50 to 80 percent of the length of the first attachment 9. Before the adjusting element 15 separates the outer sleeve 5, which in this case is composed of the first attachment 9, the second attachment 10 and the third attachment 13, from the inner sleeve 2, from which in Figure 2the shoulder 16 can be seen, is clamped, an adjustment of the outer sleeve 5 is possible. The first attachment 9 can be rotated in the circumferential direction along the first arrow 18. Additionally and independently of this, the second attachment 10 can be rotated in the circumferential direction along the second arrow 19. This enables an adjustment of the cleaning nozzles 1 adapted to the respective operating conditions. The second outlet area 12 in the present case has four circular openings that extend along the same orientation. The number of four openings is exemplary. Likewise, 2, 6, 8 or 10 could be arranged. The third outlet area 14 of the third attachment 13 is not included in the perspective view in the present case. It follows that the third outlet area 14 and thus also the inner sleeve openings 6 have a different orientation than the first outlet area 11 and the second outlet area 12.The individual attachments 9, 10, and 13 are axially offset from one another and do not overlap. They are sealed to one another by O-rings.

[0042] In Figure 3 A section of a filling system is shown. A treatment carousel 20 is shown very schematically with a number of clamps 21 that are prepared to transport the containers to be filled.

[0043] After a production phase, after maintenance, or on a regular basis, a cleaning phase takes place in the system. The cleaning nozzles 1 according to the invention are used during this phase. In this case, two cleaning nozzles 1 are each arranged in a substantially horizontal position and connected to one, namely the same, cleaning fluid line 22. During assembly, the cleaning nozzles 1 can be adjusted such that a jet of cleaning fluid leaving the cleaning nozzles 1 can be applied to the components of the filling system, thus reliably applying the cleaning fluid to the surfaces to be cleaned.

[0044] Where applicable, all individual features shown in the embodiments may be combined and / or exchanged with one another without departing from the scope of the invention. List of reference symbols

[0045] 1Cleaning nozzle 2Inner sleeve 3Connection end 4Gap 5Outer sleeve 6Inner sleeve opening 7Interior 8Outlet opening 9First attachment 10Second attachment 11First outlet area 12Second outlet area 13Third attachment 14Third outlet area 15Adjustment element 16Shoulder 17O-ring 18First arrow 19Second arrow 20Carousel 21Support arm 22Cleaning fluid line

Claims

1. A cleaning nozzle (1) for applying a cleaning fluid to surfaces to be cleaned in a filling station for filling a filling material into containers, comprising an inner sleeve (2) for guiding the cleaning fluid, wherein the inner sleeve has a connection end (3) for connection to a cleaning fluid reservoir, and an outer sleeve (5) arranged outside the inner sleeve (2) to form an intermediate space (4), wherein the inner sleeve (2) has at least one inner sleeve opening (6) for the passage of the cleaning fluid from an interior space (7) into the intermediate space (4) and the outer sleeve (5) has an outlet opening (8) for applying the cleaning fluid to the surface of the filling station to be cleaned, wherein the position of the outlet opening (8) of the outer sleeve (5) can be adjusted independently of the position of the inner sleeve opening (6) characterized in that the outer sleeve (5) comprises at least a first attachment (9) with a first outlet region (11) as part of the outlet opening (8) and a second attachment (10) with a second outlet region (12) as part of the outlet opening (8), wherein the position of the first attachment (9) is adjustable independently of the position of the second attachment (10).

2. The cleaning nozzle (1) according to claim 1, characterized in that the outer sleeve (5) comprises a third attachment (13) with a third outlet region (14) as part of the outlet opening (8), wherein the position of the third attachment (14) is preferably adjustable independently of the position of the first and / or second attachment (9, 10), wherein the third attachment (13) is further preferably a drainage attachment, such that the third outlet region (14) has the same orientation as the at least one inner sleeve opening (6) in order to allow complete draining of the cleaning fluid from the cleaning nozzle (1).

3. The cleaning nozzle (1) according to any of the preceding claims, characterized in that an adjusting element (15) may be coupled to the inner sleeve (2) at the end of the inner sleeve (2) facing away from the connection end (3), wherein a position of the outer sleeve (5) which is fixed in an operating state may be adjusted in an assembly state via the adjusting element, independently of the position of the inner sleeve (2).

4. The cleaning nozzle (1) according to claim 3, characterized in that the position of the outer sleeve (5) relative to the inner sleeve (2) is adjustable solely in the circumferential direction of the cleaning nozzle (1) in order to orient the outlet opening (8) relative to the inner sleeve opening (6), wherein the adjusting element (15) is preferably designed as a clamping nut which, in the operating state, causes the inner sleeve (2) to be clamped to the outer sleeve (5).

5. The cleaning nozzle (1) according to any of the preceding claims, characterized in that the inner sleeve opening (6) comprises at least one slot-shaped opening and / or at least one circular opening, and / or the outlet opening (8) comprises at least one slot-shaped opening and / or at least one circular opening.

6. The cleaning nozzle (1) according to any of the preceding claims, characterized in that the first outlet region (11) extends in the longitudinal direction and / or the circumferential direction of the first attachment (9), and / or the second outlet region (12) extends in the longitudinal direction and / or the circumferential direction of the second attachment (10), wherein the first and second outlet regions (11, 12) preferably differ geometrically from one another.

7. A method for mounting a cleaning nozzle for applying a cleaning fluid to surfaces to be cleaned in a filling station for filling a filling material into containers, according to one of the preceding claims, comprising the following steps: coupling the inner sleeve (2) with a cleaning nozzle coupling attachment of the filling station; placing the outer sleeve (5) onto the inner sleeve (2) so that the outer sleeve assumes a fixed position in the axial direction; orienting the position of the outer sleeve (5) in the circumferential direction relative to the inner sleeve (2).

8. The method according to claim 7, characterized in that coupling an adjusting element (15) to the inner nozzle (2) in order to generate a clamping state of the outer sleeve (5), in which the position of the outer sleeve (5) relative to the inner sleeve (2) is fixed.

9. The method according to either of claims 7 or 8, characterized in that placing the outer sleeve (5) onto the inner sleeve (2) comprises the following steps: placing a first attachment (9) of the outer sleeve (5) onto the inner sleeve (2) so that the first attachment (9) assumes a fixed position in the axial direction; and placing a second attachment (10) of the outer sleeve (5) onto the inner sleeve (2) so that the second attachment (10) assumes a fixed position in the axial direction; and / or placing a third attachment (13) of the outer sleeve (5) on the inner sleeve (2) so that the third attachment occupies a fixed position in the axial direction, wherein orienting the position of the outer sleeve (5) in the circumferential direction relative to the inner sleeve (2) comprises orienting the first attachment (9) and / or the second attachment (10) and / or the third attachment.