PRECIPITATION TUBE BUNDLE FOR A WET ELECTROSTATIC FILTER AND WET ELECTROSTATIC PRECIPITATOR

Abstract

The invention relates to a precipitation tube (1; 1) and to a precipitation tube bundle (100; 100) for a wet electrostatic precipitator, in particular for separating dusts, gases, and/or aerosols from exhaust gases. The precipitation tube (1; 1) is distinguished in that the precipitation tube is designed as a modular tube system, comprising at least two wall parts (2, 3), which each form a periphery segment (4, 5) of the inner periphery (6) of the precipitation tube (1; 1) and are connected to each other so as to form at least part of the inner circumference (6) of the precipitation tube (1; 1), and/or comprising at least two wall parts, which each form a length segment of the precipitation tube and are connected to each other so as to form at least part of the length of the precipitation tube. The precipitation tube bundle (100; 100) is distinguished in that the precipitation tube bundle is designed as a modular tube bundle system and, for this purpose, has a plurality of precipitation tubes (1; 1; 1; 50) and a supporting structure (110; 110; 110) combining the precipitation tubes (1; 1; 1; 50) as a bundle, on which supporting structure the precipitation tubes (1; 1; 1; 50) are detachably held by means of connecting elements (200). The invention further relates to a method for producing a precipitation tube bundle (100; 100).

Claims

1. A precipitation tube (1; 1) for a wet electrostatic filter, particularly for precipitating dusts, gases, and/or aerosols from exhaust gases, characterized in that, the precipitation tube (1; 1) is implemented as a modular tube system comprising at least two wall parts (2, 3) each forming a periphery segment (4, 5) of the inner circumference (6) of the precipitation tube (1; 1) and connected to each other for forming at least one part of the inner circumference (6) of the precipitation tube (1; 1), and/or comprising at least two wall parts each forming a longitudinal segment of the precipitation tube and connected to each other for forming at least one part of the length of the precipitation tube.

2. The precipitation tube according to claim 1, characterized in that the precipitation tube (1; 1) is divided longitudinally and/or transversely by the wall parts (2, 3).

3. The precipitation tube according to claim 1, characterized in that the wall parts (2, 3) are implemented as identical parts.

4. The precipitation tube according to claim 1, characterized in that at least two wall parts are cohesively connected to each other.

5. The precipitation tube according to claim 1, characterized in that at least two wall parts (2, 3) are connected to each other by means of connecting means (7).

6. The precipitation tube according to claim 5, characterized in that the connecting means (7) are implemented on the wall parts (2, 3), particularly formed thereon.

7. The precipitation tube according to claim 5, characterized in that the wall parts (2, 3) are removably connected to each other by the connecting means (7), particularly connected by means of a force fit and/or a form fit.

8. The precipitation tube according to claim 5, characterized in that the connecting means (7) are formed as form-fit means positively holding the wall parts (2, 3) together in the radial direction of the precipitation tube (1; 1) and/or in the axial direction of the precipitation tube.

9. The precipitation tube according to claim 5, characterized in that the connecting means (7) comprise at least one or more tongue-and-groove arrangements (8) engaged with each other along opposite edges (11, 12) of the wall parts (2, 3).

10. The precipitation tube according to claim 1, characterized in that retainers (13) are provided, by means of which the wall parts (2, 3) connected to each other are secured against undesired release from each other at least in one direction.

11. The precipitation tube according to claim 10, characterized in that the retainers (13) comprise a material segment (14) on one of the wall parts (2, 3) overlapping the one wall part (3) in the circumferential direction and/or in the longitudinal direction along one end and having a latching protrusion (15) brought into latching engagement in a recess (16) on the external circumference of the other wall part (2).

12. The precipitation tube according to claim 1, characterized in that at least three wall parts (2, 3, 18) are provided, each forming a periphery segment (4, 5, 19) of the inner circumference (6) of the precipitation tube (1; 1), of which each adjacent wall parts (2, 3; 3, 18; 18, 2) are connected to each other for forming at least one part of the inner circumference (6) of the precipitation tube (1; 1).

13. A wall part (2; 3; 18) for a precipitation tube (1; 1) of wet electrostatic filter, wherein the wall part (2; 3; 18) forms a periphery segment (4, 5) of the inner circumference (6) of the precipitation tube (1; 1) and is connected to at least one further wall part (2; 3; 18) for forming at least one part of the inner circumference (6) of the precipitation tube (1; 1) and/or that the wall part forms a longitudinal segment of the precipitation tube and is connected to at least one further wall part for forming at least one part of the length of the precipitation tube.

14. The wall part according to claim 13, characterized by being formed by one of the wall parts (2, 3, 18) of the precipitation tube (1; 1) according to any one of the claims 1 through 12.

15. A precipitation tube bundle (100) for a wet electrostatic filter, particularly for precipitating dusts, gases, and/or aerosols from exhaust gases, having a plurality of precipitation tubes (1; 1) according to claim 1.

16. The precipitation tube bundle (100; 100) for a wet electrostatic filter, particularly for precipitating dusts, gases, and/or aerosols from exhaust gases, characterized in that the precipitation tube bundle (100; 100) is implemented as a modular tube bundle system comprising a plurality of precipitation tubes (1; 1; 1; 50) and comprising a support structure (110; 110; 110) collating the precipitation tubes (1; 1; 1; 50) as a bundle, on which the precipitation tubes (1; 1; 1; 50) are removably held by means of connecting means (200).

17. The precipitation tube bundle according to claim 16, characterized in that the connecting means (200) are implemented as form-fit means by means of which at least one of the precipitation tubes (1; 1; 1; 50) is positively held in the axial direction relative to the support structure (110; 110; 110).

18. The precipitation tube bundle according to claim 16, characterized in that the connecting means (200) comprise at least one connecting element and at least one counterpart element, wherein the connecting element is formed or preinstalled on the associated precipitation tube (1; 1; 1; 50) and/or the counterpart element is formed or preinstalled on the support structure (110; 110; 110).

19. The precipitation tube bundle according to claim 16, characterized in that the support structure (110; 110; 110) comprises at least one, preferably a plurality of insertion receptacles (140; 140.1) in which at least one of the precipitation tubes (1; 1; 1; 50) is inserted and fixedly held in the axial direction by the connecting means (200).

20. The precipitation tube bundle according to claim 16, characterized in that the connecting means (200) comprise or form a bayonet joint (210; 210) formed by or comprising a joint groove (180; 180) or joint channel extending in the insertion direction (arrow 300) of the precipitation tube (1; 50) and a latching groove (190; 190) or latching channel on the support structure (110; 110) and a protrusion (17; 55) of the associated precipitation tube (1; 50) inserted therein.

21. The precipitation tube according to claim 20, characterized in that the latching groove (190) or the latching channel comprises a longitudinal segment forming an end position (E) for the protrusion (55), wherein the cross section of the latching groove (190) or the latching channel tapers in the longitudinal direction thereof at least into the region of the longitudinal segment.

22. The precipitation tube bundle according to claim 16, characterized in that at least some of the precipitation tubes (1; 1; 1) are formed by the precipitation tubes (1) according to any one of the claims 1 through 12.\

23. A method for producing a precipitation tube bundle (100) according to claim 16, characterized in that the precipitation tubes (1; 1; 1; 50) and the support structure (110; 110; 110) are transported to a location and assembled to each other there.

24. The method according to claim 23, characterized in that at least one of the precipitation tubes (1; 1; 50) is first assembled from the wall parts (2, 3; 51, 52, 53) at the location.

25. A wet electrostatic filter having a precipitation tube bundle (100; 100) according to claim 16, particularly produced by means of a method according to claim 23 or 24.

Description

[0061] Additional objectives, advantages, features, and potential applications of the present invention result from the below description of a plurality of embodiment examples, using the drawing. All described and/or illustrated features themselves, or in arbitrary sensible combination, form the object of the present invention, including regardless of the summary thereof in the claims or the references thereof.

[0062] In the drawings:

[0063] FIG. 1 a potential embodiment of a precipitation tube bundle for a wet electrostatic filter, in a perspective view,

[0064] FIG. 2 a bottom view of a support structure of the precipitation tube bundle according to FIG. 1,

[0065] FIG. 3 a potential embodiment of a support structure for the precipitation tube bundle according to FIG. 1, shown as a detail having a plurality of components connected to each other, in a perspective view,

[0066] FIG. 4 the support structure according to FIG. 3 and a detail of a precipitation tube supported therein, in a perspective view,

[0067] FIG. 5 the arrangement according to FIG. 4 in a magnified view in the region of the precipitation tube,

[0068] FIG. 6 a potential embodiment of a precipitation tube for a precipitation tube bundle according to FIG. 1, as a modular design, in a cross section view,

[0069] FIG. 7 the precipitation tube according to FIG. 6 in a magnified section view in the region of the connection of two wall parts of the precipitation tube adjacent to each other,

[0070] FIG. 8 a further potential embodiment of a precipitation tube for a precipitation tube bundle according to FIG. 1, shown as a section in the region of the connection of two wall parts of the precipitation tube adjacent to each other,

[0071] FIG. 9 a further potential embodiment of a precipitation tube bundle for a wet electrostatic filter, as a detail of a support structure in the region of a precipitation tube received therein, in a section view,

[0072] FIG. 10 the region A of the precipitation tube bundle according to FIG. 9, having a bayonet joint between the support structure and the precipitation tube, in a magnified section view, and

[0073] FIG. 11 the region A of the precipitation tube bundle according to FIG. 9, having a bayonet joint between the support structure and the precipitation tube, in another magnified section view.

[0074] FIG. 1 shows a schematic representation of a potential embodiment of a precipitation tube bundle 100 for a wet electrostatic filter. The precipitation tube bundle 100 comprises a plurality of precipitation tubes, of which one is labeled with the reference numeral 1 as an example. In the installed state of the precipitation tube bundle 100 on the wet electrostatic filter, the exhaust gas or exhaust air or process gas to be cleaned flows through the precipitation tube 1, and due to a generated electrical field, precipitating of gaseous and/or liquid particles occurs at the inner walls thereof.

[0075] The precipitation tube bundle 100 is suitable for installing in a horizontal orientation or vertical orientation. In order to hold together the precipitation tubes 1 as a unit, the precipitation tube bundle 100 comprises a support structure 110 by means of which the precipitation tubes 1 are collated as a bundle, and said structure performs a support function for the precipitation tubes 1. The support structure 110 preferably forms a cuff with respect to the precipitation tubes 1.

[0076] The support structure 110 can be implemented so as to be supported in a wet electrostatic filter in a vertical arrangement on a housing (not shown in FIG. 1) of the wet electrostatic filter, so that the precipitation tubes 1 then have a vertical orientation. The support structure 110 is therefore preferably disposed in the region of the top end of the precipitation tube 1.

[0077] In addition, the precipitation tube bundle 100 can comprise at least one guide part 120, particularly a guide ring, serving for spacing apart the precipitation tubes 1 from each other. The guide part 120 is disposed, for example, in the region of the other end of the precipitation tube 1. In addition, a further guide part 130, particularly a guide ring, can be provided, for example disposed between the support structure 110 and the guide part 120 and serving as a further component for spacing apart the precipitation tubes 1 from each other.

[0078] FIG. 2 shows a bottom view of the support structure 110 and the precipitation tubes 1 connected thereto. The support structure 110 comprises a plurality of pass-through opening, of which one pass-through opening is labeled with the reference numeral 140 as an example. The precipitation tubes 1 are inserted into the pass-through openings 140, wherein one of the precipitation tubes 1 is inserted into the corresponding pass-through opening 140.

[0079] The pass-through openings 140 are polygonal in design, for example, so that altogether a honeycomb structure results from the mutually adjacent pass-through openings 140. In the same or similar manner, the guide part 120 and/or the guide part 130 can have such pass-through openings, altogether forming a honeycomb structure, for example.

[0080] The support structure 110 further comprises a protrusion 150 protruding outward, preferably a circumferential protrusion 150, on which the support structure 110 can be supported in a housing (not shown in FIG. 1). The protrusion 150 can be formed by an edge region of a plate-shaped support element of the support structure 110.

[0081] The precipitation tube bundle 100 is implemented as a modular tube bundle system and thus the precipitation tube bundle 100 is to be erected using the modular principle. To this end, the precipitation tubes 1 are removably held on the support structure 110.

[0082] If the precipitation tube bundle 100 comprises at least one of the two guide parts 120 and 130, then the guide parts 120 and 130 are preferably also removably connected to the precipitation tubes 1. The precipitation tubes 1 can thereby be transported loose and separately from the support structure 110 as a module of the tube bundle system to the installation location of the wet electrostatic filter. The support structure 110 and the guide parts 120 and 130 form further modules of the precipitation tube bundle 100 implemented as a tube bundle system. The removable connection of the support structure 110 to the precipitation tube 1, the removable connection between the guide part 120 and the precipitation tube 1, and the removable connection between the guide part 130 and the precipitation tubes 1 is preferably implemented by connecting means (not shown in FIGS. 1 and 2), preferably implemented as form-fit means.

[0083] FIGS. 3, 4, and 5 show a potential embodiment of a support structure 110 for use as a support structure, for example, for the precipitation tube bundle 100 according to FIG. 1. Only a segment of the support structure 110 is shown as an example in FIGS. 3, 4, and 5, in order to explain the construction of the support structure 110.

[0084] In the present embodiment, the support structure 110 itself is modular in design and comprises a plurality of parts 160, of which at least two, preferably at least three parts 160.1, 160.2, 160.3 form a periphery segment of at least one of the pass-through openings 140, so that the inner circumference of the pass-through opening 140.1 is formed by the parts 160.1, 160.2, 160.3 in the assembled state.

[0085] The parts 160 are preferably connected to each other by means of welding, riveting, and/or gluing. In the embodiment example of the support structure 110 according to FIGS. 3, 4, and 5, the parts 160 are connected to each other by means of spot welding, as can be seen by the spot welds 170.

[0086] Alternatively, the parts 160 can also be removably mutually connected, for example by means of form-fit means and/or force-fit means. For example, screw elements can be provided, by means of which adjacent parts 160 are screwed to each other.

[0087] FIG. 4 shows a segment of the support structure 110 according to FIG. 3 using a plurality of assembled parts 160, wherein one precipitation tube 1 is removably received in the pass-through opening 140.1 as an example. FIG. 5 shows examples of connecting means 200 by means of which the precipitation tube 1 is removably retained on the support structure 110.

[0088] As can be seen in FIG. 5, the connecting means 200 can be formed by a bayonet joint 210. The bayonet joint 210 is formed, for example, by a joint groove 180 or joint channel extending in the axial direction with respect to the pass-through opening or insertion receptacle, and by a latching groove 190 or latching channel extending transverse thereto, both implemented on the support structure 110, particularly on at least one of the parts 160. The bayonet joint 210 further comprises at least one protrusion 17 implemented on the precipitation tube 1, for example formed thereon.

[0089] For assembling the precipitation tube 1 to the support structure 110, one end of the precipitation tube 1 is inserted into the pass-through opening 140.1, wherein the protrusion 17 of the precipitation tube 1 is introduced into the joint groove 180 when inserting the precipitation tube 1. The precipitation tube 1 is then inserted into the pass-through opening 140.1 far enough for the protrusion 17 to reach the inlet region of the latching groove 190. By rotating the precipitation tube 1 relative to the support structure 110, the protrusion 17 is inserted into the latching groove 190 and from there is brought into the end position thereof in the latching groove 190. The precipitation tube 1 is thereby secured against pulling out of the pass-through opening 140.1 and the precipitation tube 1 is thus secured and attached to the support structure 110.

[0090] FIG. 6 shows a potential embodiment of a precipitation tube 1 for a precipitation tube bundle of a wet electrostatic filter, for example for use in the precipitation tube bundle 100 according to FIG. 1. The precipitation tube 1 according to FIG. 6 can also be used in an assembly having the support structure 110 according to FIGS. 3 through 5 and thus comprise a part of the connecting means 200 provided there, particularly the protrusion 17 of the bayonet joint 210.

[0091] The precipitation tube 1 according to FIG. 6 is itself modular in construction and comprises at least two, preferably at least three wall parts 2, 3, and 18, each forming a periphery segment 4, 5, and 19 of the inner circumference 6 of the precipitation tube 1 and able to be connected to each other for forming at least one part of the inner circumference 6 of the precipitation tube 1. The precipitation tube 1 is preferably divided longitudinally by the wall parts 2, 3, and 18. In the representation according to FIG. 6, the wall parts 2, 3, and 18 are assembled together and the precipitation tube 1 is thereby formed.

[0092] The precipitation tube 1 comprises connecting means 7 by means of which the adjacent wall parts 2, 3 or 3, 18 or 18, 2 are connected to each other, particularly removably connected, for example connected to each other by force-fit and/or form-fit means.

[0093] FIG. 7 shows a potential embodiment of the connecting means 7 using the example of the wall parts 2 and 3 adjacent to each other. As can be seen therefrom, the connecting means 7 are formed by a tongue-and-groove arrangement 8, for example implemented along opposite end regions or free edges 11 and 12 of the wall parts 2 and 3.

[0094] For example, a tongue element 9 of the tongue-and-groove arrangement 8 can be implemented at one end in the circumferential direction of the wall part 2, particularly formed thereon, and a groove element 10 corresponding thereto can be implemented on the opposite circumferential end of the wall part 3, particularly formed thereon. When the tongue element 9 is then brought into engagement with the groove element 10, form-fit connection acting in the radial direction relative to the precipitation tube 1 is achieved.

[0095] In order to prevent releasing the wall parts 2 and 3 from each other, additional retainers 13 are preferably provided (FIG. 6). The retainers 13 preferably comprise a material segment 14 implemented on, preferably formed on, one of the adjacent wall parts 2 and 3, for example the wall part 3. The material segment 14 extends past the other of the adjacent wall parts 2 and 3, for example the wall part 2, on the circumferential side along one end, and a latching protrusion 15 thereof engages in a recess 16 implemented on the outer circumference of the other wall part 2. When the latching protrusion 15 is latchingly engaged in the recess 16, the tongue-and-groove arrangement 8 is secured against releasing in the radial direction.

[0096] The tongue element 9 and the groove element 10 preferably extend continuously in the longitudinal direction of the precipitation tube 1. The retainers 13 preferably extend continuously in the longitudinal direction of the precipitation tube 1. For example, the tongue element 9 and the groove element 10 are each implemented as a profile extending in the longitudinal direction of the precipitation tube 1. For example, the material segment 14 and the latching protrusion 15 are at least partially implemented as a corresponding profile in the longitudinal direction of the precipitation tube 1, wherein the recess 16 is preferably continuously profiled in the circumferential extent of the associated wall part 2 in the longitudinal direction of the precipitation tube 1.

[0097] FIG. 8 shows a further potential embodiment of a precipitation tube 1 for a precipitation tube bundle of a wet electrostatic filter, for example for use in the precipitation tube bundle 100 according to FIG. 1. The precipitation tube 1 according to FIG. 8 can also be used in an assembly having the support structure 110 according to FIGS. 3 through 5 and thus comprise a part of the connecting means 200 provided there, particularly the protrusion 17 of the bayonet joint 210. The precipitation tube 1 is shown in cross section in FIG. 8 in the region of the connection of two adjacent wall parts 2 and 3.

[0098] The precipitation tube 1 differs from the precipitation tube 1 according to FIGS. 6 and 7 in part in that a separate connecting element 20 is provided, by means of which the wall parts 2 and 3 can be connected to each other on the circumferences thereof by interposing said element. FIG. 8 shows the wall parts 2 and 3 connected by means of the separate connecting element 20.

[0099] The connecting element 20 can extend continuously in the axial direction of the precipitation tube 1, for example implemented as a profile extending in the axial direction. The connecting element 20 can be implemented so as to implement a tongue-and-groove connection with the wall part 2 and also implement a tongue-and-groove connection with the wall part 3.

[0100] The connecting element 20 can comprise a receptacle for a circumferential end of the wall part 2 and a further receptacle for a circumferential end of the wall part 3 to this end, said receptacles each being implemented as a groove element 10.1 or 10.2. The receptacles or groove elements 10.1 and 10.2 can be mirror-symmetrical to each other with respect to a center axis 21, so that the openings of the receptacles are disposed opposite each other. The wall parts 2 and 3 each comprise a corresponding tongue element 9 at the end region thereof, said element being inserted in the corresponding groove element 10.1 or 10.2.

[0101] The connecting element 20 preferably comprises retainers by means of which the wall parts 2 and 3 to be connected to each other are secured against undesired release form each other. To this end, the connecting element 20 comprises a material segment 14.1 overlapping the wall part 2 in the circumferential direction along one end and able to engage or engaged by latching a latching protrusion 15.1 into a recess 16.1 on the outer circumference of the wall part 2. The retainers preferably additional comprise a material segment 14.2 overlapping the wall part 3 in the circumferential direction along one end and able to engage or engaged by latching a latching protrusion 15.2 into an associated recess 16.2 on the outer circumference of the wall part 3.

[0102] As can be seen in FIG. 8, the cross section of the connecting element 20 can be constructed uniformly, particularly mirror-symmetrically, relative to the center axis 21. The corresponding tongue elements 9 on both the wall part 2 and the wall part 3 can thereby be implemented identically to each other. The wall parts 2 and 3 of the precipitation tube 1 can thereby be implemented as parts identical to each other.

[0103] FIG. 9 shows a further potential embodiment of a precipitation tube bundle 100 for a wet electrostatic filter implemented as a modular tube bundle system. The precipitation tube bundle 100 comprises a plurality of precipitation tubes and a support structure 110 collating the precipitation tubes as a bundle, on which the precipitation tube are removably held. FIG. 9 shows of a segment of the support structure 110 in the region of one of the precipitation tubes in a section view through the cross section of a precipitation tube 50 and through the support structure 110.

[0104] The precipitation tube 50 can be modular in construction and be made of a plurality of, for example three, wall parts 51, 52, and 53, each forming a periphery segment of the inner circumference 6 of the precipitation tube 50 and connected to each other for forming part of the inner circumference 6 of the precipitation tube 50. The connecting means 7 described for FIGS. 1 through 5 can be used to this end.

[0105] The pass-through opening of the support structure 110 forms an insertion receptacle into which the precipitation tube 50 is inserted. By means of a bayonet joint 210, the precipitation tube 50 is positively retained on the support structure 110 in the axial direction relative to the longitudinal axis 54, particularly the center axis, of the precipitation tube 50. The bayonet joint 210 and the pass-through opening in the support structure 110, the dimensions of which preferably correspond to the outer dimensions of the precipitation tube 50, thus form the attachment of the precipitation tube 50 to the support structure 110.

[0106] The bayonet joint 210 is preferably present at least as one, preferably as three thereof, wherein each wall part 51 or 52 or 53 is associated with one of the bayonet joints 210, for example. A stable and durable attachment of the precipitation tube 50 to the support structure 110 in the axial direction is thereby achieved. Each bayonet joint 210 is preferably disposed outside of the corresponding connecting means 7.

[0107] The construction of the bayonet joint 210 is shown as an example in FIGS. 10 and 11. FIGS. 10 and 11 show the region A of FIG. 9 in a magnified view, wherein FIG. 10 shows the region A in a section view along the section line B-B of FIG. 9 and FIG. 11 shows the region A in a cross section view according to FIG. 9.

[0108] The support structure 110 comprises a joint groove 180 or a joint channel in the region of the edge of the pass-through opening for the precipitation tube 50, said groove extending in the longitudinal direction thereof substantially in the insertion direction of the precipitation tube 50 into the pass-through opening of the support structure 110. For example, the longitudinal direction of the joint groove 180 or the joint channel extends in the axial direction relative to the precipitation tube 50. The joint groove 180 or the joint channel opens into a latching groove 190 or a latching channel extending transverse to the joint groove 180 or joint channel. The joint groove 180 or the joint channel and the latching groove 190 or latching channel form the part of the bayonet joint 210 associated with the support structure 110. The part of the bayonet joint 210 associated with the precipitation tube 50 is formed by a protrusion 55 formed on or connected to the precipitation tube 50. The protrusion 55 can be implemented as a catch, a bump, or similar latching element, for example having a cylindrical cross section.

[0109] The bayonet joint 210 is produced in the same manner as previously described for the bayonet joint 210 according to FIG. 5. The precipitation tube 50 is inserted into the pass-through opening of the support structure 210 in the direction of the arrow 300 and the protrusion 55 is thereby inserted into the joint groove 180. By rotating the precipitation tube 50 relative to the support structure 100 in the direction of the arrow 310, the protrusion 55 enters the latching groove 190 from the joint groove 180, by means of which the form-fit connection in the axial direction, and thereby the bayonet joint 210, is implemented.

[0110] For example, an end region of the latching groove 190 or the latching channel forms an end position E for the protrusion 55. In FIG. 10, the protrusion 55 is shown in different positions as examples in the joint groove 180 and in the latching groove 190, in order to demonstrate the progress of the protrusion 55 when establishing the bayonet joint 210. FIG. 11 shows the protrusion 55 first inserted into the joint groove 180 and as an example in the end position E in the latching groove 190, when the bayonet joint 210 is established.

[0111] The latching groove 190 or the latching channel can taper in the longitudinal direction at least until the region of the longitudinal segment by which the end position E is formed, as can be seen in FIG. 10. In addition, the latching groove 190 or the latching channel can comprise a catch 56 on at least one side wall or on opposing side walls, in order to retain the protrusion 55 in the end position E. The catch 56 can be formed by a bulge or bump on the side wall or both side walls. The bulge 56 can comprise a linear extent. The bulge 56 can additionally or alternatively be implemented as a point.

REFERENCE LIST

[0112] 1 Precipitation tube

[0113] 1 Precipitation tube

[0114] 1 Precipitation tube

[0115] 1 Precipitation tube

[0116] 2 Wall part

[0117] 2 Wall part

[0118] 3 Wall part

[0119] 3 Wall part

[0120] 4 Periphery segment

[0121] 5 Periphery segment

[0122] 6 Inner circumference

[0123] 7 Connecting means

[0124] 8 Tongue-and-groove arrangement

[0125] 9 Tongue element

[0126] 10 Groove element

[0127] 10.1 Groove element

[0128] 10.2 Groove element

[0129] 11 Edge

[0130] 12 Edge

[0131] 13 Retainer

[0132] 14 Material segment

[0133] 14.1 Material segment

[0134] 14.2 Material segment

[0135] 15 Latch protrusion

[0136] 15.1 Latch protrusion

[0137] 15.2 Latch protrusion

[0138] 16 Recess

[0139] 16.1 Recess

[0140] 16.2 Recess

[0141] 17 Protrusion

[0142] 18 Wall part

[0143] 19 Periphery segment

[0144] 20 Separate connecting element

[0145] 21 Center axis

[0146] 50 Precipitation tube

[0147] 51 Wall part

[0148] 52 Wall part

[0149] 53 Wall part

[0150] 54 Longitudinal axis

[0151] 55 Protrusion

[0152] 56 Catch

[0153] 100 Precipitation tube bundle

[0154] 100 Precipitation tube bundle

[0155] 110 Support structure

[0156] 110 Support structure

[0157] 110 Support structure

[0158] 120 Guide part

[0159] 130 Guide part

[0160] 140 Pass-through opening

[0161] 140.1 Pass-through opening

[0162] 150 Protrusion

[0163] 160 Part

[0164] 160.1 Part

[0165] 160.2 Part

[0166] 160.3 Part

[0167] 170 Weld spot

[0168] 180 Joint groove

[0169] 180 Joint groove

[0170] 190 Latching groove

[0171] 190 Latching groove

[0172] 200 Connector

[0173] 210 Bayonet joint

[0174] 210 Bayonet joint

[0175] 300 Arrow

[0176] 310 Arrow

[0177] E End position