DE102022107221B4 - Use of a feedthrough system - Google Patents

Abstract

Use of a lead-through system (1) which has a lead-through (2) for a wall or floor element (5) with a pipe socket (3) and a protective pipe (4) which has a corrugated outer wall surface (40) at least in a central section (4.2), wherein the central section (4.2) and an end section (4.1) of the protective pipe (4) adjoining this to an end (4.3) of the protective pipe (4) are formed monolithically with one another, in which usei) the pipe socket (3) is installed in a wall or floor element (5),ii) the end section (4.1) of the protective pipe (4) is pushed onto the pipe socket (3), wherein the protective pipe (4) also has a corrugated outer wall surface (40) in the end section (4.1) when viewed in a longitudinal section, and wherein, when viewed in the longitudinal section, elevations (41) forming the corrugated outer wall surface (40) in the end section (4.1) have a smaller Height h as the corrugated outer wall surface (40) forming elevations (42) in the central section (4.2).

Description

The present invention relates to the use of a feedthrough system which has a feedthrough for installation in a wall or floor element.

The bushing includes a pipe socket that is installed in the wall or floor element and through which the actual pipe can then be laid later. During installation, a protective pipe is attached to the pipe socket. This extends the pipe socket and extends, for example, into the ground on the outside of the building.

The JP H11-315961 A shows a sleeve section that protrudes from a wall element, with a corrugated tube being pushed onto the sleeve section as a protective tube.

The US 2001/0008342 A1 shows a feedthrough into which a spiral pipe or hose is inserted. To do this, the feedthrough forms a sleeve and an attachment is placed on the spiral pipe or hose to engage in the sleeve.

The CN109488820A relates to a composite corrugated pipe, a section of which is provided with elevations of lower height and then formed into a sleeve.

The present invention is based on the technical problem of specifying an advantageous feedthrough system with feedthrough and protective tube as the object of use.

This is achieved according to the invention with the use according to claim 1, in particular the protective tube which has a corrugated outer wall surface at least in a central section. A special feature is that no separate sleeve is attached to this protective tube for connection to the pipe socket, but rather the protective tube itself is pushed directly onto the pipe socket. In alternative tests to the present subject matter, however, the inventors first attached a sleeve to the protective tube, whereby this sleeve could then be pushed onto the pipe socket of the feedthrough. This showed relatively high pull-off forces in pull-out or detachment tests. Surprisingly, however, the inventors were also able to observe good results in the pull-out tests in comparative tests in which they pushed the protective tube directly onto the pipe socket.

Specifically, according to the main claim, an end section of the protective tube is pushed onto the pipe socket (the bushing), the protective tube having the corrugated outer wall surface in any case in a middle section adjoining this end section, for example as a corrugated or generally also spiral tube (spiral hose), see below in detail. Due to this shape, the protective tube, e.g. B. if it is unwound from a roll or similar in use, a certain tension or twist may be inherent. When it is pushed onto the pipe socket, the protective pipe is then centered to a certain extent; for example, a slightly oval cross-sectional profile due to the twist can be centered on a pipe socket with a circular cross-sectional profile (e.g. it is simultaneously compressed along the major semi-axis and along the small one semi-axis widened). Regardless of the details, the pushed-on end section of the protective pipe sits on the pipe socket.

In this case, the end section of the protective pipe is pushed on; in comparison, pushing it into the pipe socket itself or a separate sleeve could possibly offer an additional fastening option, namely allowing it to be locked into the corrugated outer wall surface. Pushing it on is, however, advantageous in that the protective pipe can then be provided with a larger inner diameter, which makes it easier to guide the line through later.

Preferred embodiments can be found in the dependent claims and the entire disclosure, whereby the presentation of the features does not always distinguish in detail between use and method or device aspects; in any case, the disclosure is to be read implicitly with regard to all claim categories.

The end and middle sections of the protective tube are provided monolithically with one another in relation to the longitudinal direction of the protective tube, i.e. made of the same uninterrupted material in the longitudinal direction; in other words, there is no material boundary between the end and middle sections in relation to the longitudinal direction. In general, the longitudinal direction is parallel to the longitudinal axis of the protective tube, which lies centrally in its inner volume. As mentioned, the monolithic design refers to the longitudinal direction; in radial directions perpendicular to the longitudinal axis, the protective tube can also be constructed in multiple layers, for example from layers of different materials (so-called composite tube).

The end section, which has an axial overlap with the pipe socket after the protective pipe has been pushed on, i.e. which follows the pipe socket radially, can have an axial length of at least 4 cm or 5 cm, with possible upper limits of 30 cm, 20 cm or 15 cm, for example. The protective tube preferably has, at least in the end section, an inner diameter that is at most 5%, 4% or 3% larger than the outer diameter of the pipe socket (on the other hand, it can be at least 0.5%, 0.75% or 1% larger, for example, to make it easier to slide on). In absolute values, the difference in diameter can be at least 1 mm and (regardless of this) at most 3 mm or 2 mm. The inner diameter of the protective tube can be at least 5 cm, 6 cm or 7 cm, for example; possible upper limits are at most 20 cm, 15 cm or 10 cm, for example.

The middle section can, for example, have a length of at least 0.75 m or 1 m (“minimum length”), but it can also be considerably longer (at least 5 m or 10 m), with possible upper limits e.g. B. can be a maximum of 50 m, 40 m or 30 m. If the length exceeds the minimum length, structures can occur in the middle section that are also found in the end section, for example one or more sections with elevations of low height. The protective tube is preferably manufactured from a minimum length in a translationally symmetrical manner in an endless process, so it can be shortened as desired at intervals corresponding to integer multiples of the minimum length.

The protective pipe is preferably simply pushed onto the pipe socket, but not separately secured. In this case, no clamping device is provided on the protective pipe to press the protective pipe radially inwards against the pipe socket, i.e. no tensioning clamp, for example. There is also no clip, for example, which on the one hand grips into the corrugated outer wall surface of the protective pipe and on the other hand is fixed in position relative to the pipe socket in order to hold the two together in an axially positive fit. In other words, the protective pipe is attached to the pipe socket simply by pushing it onto it, so the two are not additionally fixed in position relative to one another or attached to one another, apart from the soil material (e.g. gravel, crushed stone, etc.) that is filled around the feedthrough system after it has been put together.

The protective tube has (at least in sections) a corrugated outer wall surface, i.e. when viewed in a sectional plane containing the longitudinal axis of the protective tube, it is shaped with elevations and depressions that follow one another in the longitudinal direction. These surveys are preferably each circumferential, based on a revolution around the longitudinal axis, closed in themselves, see below in detail. In other words, the protective tube is preferably a corrugated tube.

According to the invention, the protective tube has a corrugated outer wall surface not only in the middle section, but also in the then pushed-on end section. This can be advantageous, for example, with regard to the production of the protective tube; this can then, for example, be produced as a tube that is still stable overall in an endless process with an extruder and corrugator. Both the mold jaws that produce the middle section and the mold jaw(s) that produce the end section then each introduce a wave contour into the outer wall surface.

According to the invention, the elevations in the end section have a lower height than the elevations in the middle section of the protective tube. The reduced height in the end section can be advantageous, for example, in terms of stability and/or space requirements. In the area of the feedthrough, the space conditions can be cramped in general and in particular in the case of several pipe sockets arranged next to one another, so the elevations at a reduced height create some space there.

The heights are viewed in a longitudinal section and are each taken as the radial distance between the elevation (the maximum thereof) and the depression closest to the pipe end of the end section. In general, there can also be different heights within the end section and/or middle section and the height comparison just mentioned applies at least to the highest elevation of the end section compared to the highest elevation of the middle section. Preferably there are at least two, three, four or five elevations with the same height in the end section (possible upper limits can be, for example, a maximum of 40, 30, 20 or 10, respectively) and there are at least 10, 20, 30, 40 in the middle section 50 elevations with the same height (with possible upper limits of e.g. a maximum of 10,000, 1,000 or 100), whereby the height comparison then refers to this. For the height comparison, a section of the middle section is preferably considered, which directly adjoins the end section and extends over 1 m away from it.

The elevations in the end section can, for example, have a height that is at least 10%, 15%, 20% or 25% lower than the elevations in the middle section. (Possible upper limits can, for example, be at most 70%, 60% or 50%). In absolute values, the height difference can, for example, be at least 1 mm, preferably at least 1.5 mm (with possible upper limits of, for example, at most 5 mm, 4 mm or 3 mm). Regardless of the dimensions, it can also be preferred that the elevations in the middle and end sections have the same axial width and/or have the same period width from survey to survey.

In a preferred embodiment, the last elevation in the end section, which is located directly at the end of the protective tube, has a reduced height compared to the other elevations in the end section. If the latter are already designed with a reduced height compared to the middle section, there can be first elevations in the middle section with a first height, second elevations in the end section with a second height that is smaller than the first height, and then a third elevation at the end in the end section with a third height that is again smaller than the second height. With regard to possible geometric details (percentage and/or absolute height difference, etc., here in comparison to the other elevations in the end section), reference is made to the above information on the difference between the middle and end sections.

The (even) smaller elevation at the end of the pipe can be advantageous from a manufacturing perspective, for example, as it marks the transition to the next pipe in a pipe produced in a continuous process. The pipes can be separated from each other there, with two such elevations preferably next to each other beforehand; viewed in longitudinal section, a smaller curvature can be formed between them than between the other elevations. A sawing tool can then be guided reliably, for example.

According to a preferred embodiment, an inner wall surface of the protective pipe is smooth in the end section, i.e. it has a straight line when viewed in a longitudinal section. This can, for example, simplify the sliding on and in particular the sealing of the protective pipe against the pipe socket. The inner wall surface is preferably also smooth in the middle section, which can then, for example, simplify the later routing of a media line and/or be advantageous due to uniform production. The smooth inner wall surface between the end and middle sections is particularly preferably offset-free, i.e. without radial offset; there is therefore no step in between. Viewed in a longitudinal section, for example, a continuous, in particular axially parallel straight line can be laid in the inner wall surface of the end and middle sections.

The protective tube with a corrugated outer surface and a smooth inner wall surface can preferably be a composite corrugated tube. This can be manufactured, for example, using two extruders starting from two smooth coaxial tubes or hoses, with the radially outer hose being sucked into the mold jaws using a vacuum (so that only the outer hose is given the contour).

In general, the pipe socket and the protective pipe could also simply be plugged together mechanically, but not further sealed against each other. However, a relative sealing of the two is preferred; this is particularly preferably done with a comparatively long sealing element. In a preferred embodiment, this has an axial length, which is taken parallel to the longitudinal axis of the protective tube, of at least 1 cm, more preferably at least 1.5 cm (possible upper limits can be, for example, at most 5 cm or 4 cm). With the sealing element, the protective pipe and the pipe socket can be sealed against each other, for example, against a pressure of at least 0.2 bar, 0.3 bar or 0.4 bar (possible upper limits can be, for example, 10 bar, 5 bar or 2 bar ). The sealing element, particularly with its axial length, can also be mechanically advantageous, namely holding the protective tube on the pipe socket in a frictional manner, i.e. increasing the pull-off force.

The sealing element is made of an elastomer material, for example, i.e. generally a plastic with elastic properties. Its Shore hardness (Shore A) can be, for example, a maximum of 90 Shore, 80 Shore, 75 Shore or 70 Shore and (independently of this) at least 20 Shore, 25 Shore, 30 Shore, 35 Shore or 40 Shore. It can be a rubber material, for example, preferably a synthetic rubber, such as EPDM (ethylene propylene diene, M group). However, it can also be a thermoplastic elastomer (TPE) or a silicone-based material, such as silicone rubber or silicone elastomer.

In general, the sealing element could also be arranged in the protective tube, for example inserted into it, and pushed on together with it. In a preferred embodiment, however, the sealing element is already arranged on the pipe socket before or when the protective tube is pushed on. In general, it can also be formed in one piece with the pipe socket, for example by being sprayed onto it as a soft component in a multi-component injection molding process, but it is preferably placed on the pipe socket as a separate component beforehand.

In a preferred embodiment, a fastening section of the sealing element sits in a groove (at least after step ii, preferably already during this) which is provided in the outer surface of the pipe socket. In this case, an outer wall of the fastening section, viewed in a longitudinal section, is curved outwards away from the groove, i.e. it is convexly shaped. The pushed-on protective tube then pushes this outer wall radially inwards, thereby sealing the fastening section well tends to be pressed into the groove. This can, for example, also create a good hold of the sealing element. The sealing element can extend further away from the fastening section along the outer surface of the pipe socket, in particular towards or up to its end (onto which the protective ear is pushed). In such a connecting section adjoining the fastening section, the sealing element can have an outer wall that is offset radially inwards relative to the fastening section (viewed in longitudinal section).

According to a preferred embodiment, the sealing element has a covering section that at least partially covers an end face of the pipe socket. Looking axially at the end of the pipe socket onto which the protective pipe is pushed, the covering section therefore covers at least part of the annular end face, preferably the entire end face. The at least partial covering can, for example, prevent damage to the media line when it is laid through the protective pipe into the building.

In a preferred embodiment, the covering section forms an insertion surface that is inclined in the direction of the inner volume of the pipe socket. This can prevent the media line from getting caught, as it can easily slide out of the protective pipe along the insertion surface into the pipe socket. The insertion surface is oblique when viewed in a longitudinal section, so when viewed in the section, a compensation line placed in the insertion surface forms an angle with the longitudinal axis of the protective tube, for example of at least 10° or 20° and z. B. of no more than 80° or 70°.

As already mentioned above, the protective tube is preferably designed as a corrugated tube. The elevations provided in the middle section, and preferably also in the end section, are therefore each closed all the way around.

The present object can be particularly advantageous in the case of a multiple feedthrough which has several pipe sockets which are generally aligned parallel to one another. In total, for example, at least 2 or 3 and generally no more than 5 pipe sockets can be provided, with exactly 4 pipe sockets being particularly preferred. Preferably, a respective protective pipe is then attached to each of the pipe sockets, which can be equipped in a manner described here. In this multiple variant, the raised portions in the end section which are reduced in their radial height can be particularly advantageous because they can enable the pipe sockets to be arranged relatively close to one another and thus enable a compact structure. Consequently, for example, an opening in the wall or floor element in which the feedthrough is installed does not have to be planned to be too large.

According to a preferred embodiment, the floor element in question is a floor slab of a building, i.e. its foundation slab, and/or the wall element is an external wall of a building, preferably a basement wall. The object can particularly preferably be directed at a wall duct that is installed in an external wall of a building. This is preferably done after this external wall has been manufactured, i.e. the duct is inserted into a through hole in the building wall. This is preferably done from the inside of the building to the outside of the building, i.e. the pipe socket(s) are inserted into the through hole from the inside of the building to the outside of the building, so that they protrude from the outside of the building.

The pipe socket(s) can then be attached to the wall either by dry installation, for example with a press seal. This can have a number of through holes corresponding to the number of pipe sockets, with a respective pipe socket sitting in a respective through hole of the elastomer body of the press seal and the elastomer body then being pressed by bracing radially inwards against the respective pipe socket and radially outwards against the reveal of the through opening . Alternatively, the pipe sockets can also be fastened, for example, by wet installation, i.e. by filling the pipe socket(s) in the through opening with an initially flowable and then solidifying casting material, for example mortar. Regardless of the details, the bushing is preferably first fastened in the through opening and then the protective tube is pushed onto the pipe socket, in particular a respective protective tube onto a respective pipe socket. Afterwards, soil material can be piled up on the outside of the building, i.e. a trench can be filled with the protective pipe(s).

In a preferred embodiment, after steps i) and ii), a media line is laid through the protective pipe and the pipe socket, which then extends, for example, from a street-side connection into the building interior. This provides a corresponding media connection inside the building, for example the electricity, water, gas or telecommunications connection. In an alternative preferred embodiment, the feedthrough can also be used as a building feedthrough, i.e. the respective medium can be brought to the outside of the building via the feedthrough. e.g. to provide a power connection in the garden. Regardless of whether it is an entry or exit into the building, the media line is then preferably sealed relative to the pipe socket with a sealing element; this then closes off the inner volume of the pipe socket towards the inside of the building.

In the following, the invention is explained in more detail using an exemplary embodiment, whereby the individual features within the scope of the independent claims can also be essential to the invention in other combinations and no distinction is made in detail between the different claim categories.

• 1 eine geschnittene Seitenansicht eines Durchführungssystems mit einer Durchführung und einem Schutzrohr;
• 2 einen Teil eines Schutzrohrs des Systems gemäß 1 in einer Detaildarstellung;
• 3a eine Detailansicht zu 2;
• 3b eine weitere Detailansicht zur Illustration des Übergangs zwischen zwei Schutzrohren vor deren Auftrennung;
• 4 ein bei dem System gemäß 1 zwischen Schutzrohr und Rohrstutzen angeordnetes Dichtelement.

In detail,

• 1 a sectional side view of a feedthrough system with a feedthrough and a protective tube;
• 2 a part of a protective pipe of the system according to 1 in a detailed representation;
• 3a a detailed view of 2 ;
• 3b another detailed view to illustrate the transition between two protective tubes before they are separated;
• 4 a system according to 1 Sealing element arranged between the protective pipe and the pipe socket.

1 shows a feedthrough system 1 that includes a feedthrough 2 with a jacket pipe 3 and a protective pipe 4. The feedthrough 2 is installed in a wall or floor element 5, in this case an external wall 6 of a building. Media lines 7 (indicated schematically) can then later be laid into the building via the feedthrough 2; the corresponding media connection is then available on the inside 8 of the building, and on the outside 9 of the building the media line 7 runs in the respective protective pipe 4 in the ground (e.g. up to a road junction).

The casing pipe 3 is mounted in the opening 15 by means of a press seal 12 of the bushing 2. The press seal 12 has an elastomer body 12.1 which is enclosed axially on both sides by clamping bodies 12.2, 12.3. The clamping bodies 12.2, 12.3 are moved axially towards one another by tightening clamping bolts (not shown here), as a result of which the elastomer body 12.1 is pressed radially outwards against the reveal and radially inwards against the inserted casing pipe 3. During assembly, the bushing 2 with the press seal 12 and the pipe socket 3 is inserted into the opening 15 from the inside 8 of the building in such a way that the pipe socket 3 protrudes on the outside 9 of the building.

On the outside 9 of the building, the protective pipe 4 is then connected to the pipe socket 3, which in this case is done by pushing on the protective pipe 4 itself. For comparison and illustration, a protective pipe connection not according to the invention is shown in the lower half of the image, namely a further protective pipe 24 which is attached to the further pipe socket 23 via a sleeve 25. The sleeve 25 must first be attached to the further protective pipe 24, then it is pushed onto the further pipe socket 23. This requires several handling steps and is therefore complex. In contrast, directly pushing on the protective pipe 4 represents a simplification, and it also enables a larger inner diameter of the protective pipe. The latter is clear from the comparison; in the case of the sleeve 25, the protective pipe 24 must be smaller so that it fits into the sleeve 25.

2 shows a protective tube 4 in a combined sectional/side view. An end section 4.1 and an adjoining middle section 4.2 can be seen, whereby these sections 4.1, 4.2 are formed monolithically with one another, i.e., in relation to a longitudinal direction 31 parallel to the longitudinal axis 30, they are formed from the same continuous material. In relation to radial directions 32 perpendicular to the longitudinal axis 30, the protective tube 4 in the present example is constructed in two layers, namely as a composite corrugated tube.

In both the end and middle sections 4.1, 4.2, the protective tube 4 is provided with a corrugated outer wall surface 40, while its inner wall surface 45 is smooth. In detail, the underlying elevations 41 in the end section 4.1 are provided with a lower radial height h than the elevations 42 in the middle section 4.2, cf. 3a in detail. Furthermore, in the end section 4.1, at the end 4.3 of the protective tube 4, there is a final elevation 43, which has a further reduced height h compared to the other elevations 41 of the end section 4.1, cf. 3b .

3a illustrates the elevations 41 of the end section 4.1 and the elevations 42 of the middle section 4.2 in a detailed view, which shows the height difference Ah. Apart from that, the elevations 41, 42 are partly the same, in particular the axial period widths wp _4.1 , wp _4.2 are the same, the axial widths w _4.1 , w _4.2 differ slightly.

3b shows a detail of two protective tubes 2 immediately after production, before they are separated from each other. The Corresponding separation points are marked by the last elevations 43, between which the radius R ₂ is also smaller than between the elevations 41, i.e. than the radius R ₁ .

4 shows a sealing element 50, which is placed on the outside of the pipe socket 3 (only indicated schematically in the upper half of the picture) and then seals it against the pushed-on protective pipe (not shown). The sealing element 50 has an axial length of just over 2 cm, a fastening section 50.1 of which sits in a groove 55 in the outer wall 3.1 of the pipe socket 3. The fastening section 50.1 has a curved outer wall 50.1.1, which ensures a good seal with the protective pipe and a hold can create. A connecting section 50.2 adjoins the fastening section 50.1 towards the end 3.2 of the pipe socket 3, which surrounds the end pipe section radially outwards. This is followed by a covering section 50.3, which axially covers the end face 3.2.1 of the pipe socket 3. Furthermore, the covering section 50.3 forms an inclined insertion surface 50.3.1, which can prevent a media line that is later laid through from getting caught.

List of reference symbols

1

Implementation system

2

execution

3

Pipe socket

3.1

Outer wall of the pipe socket

3.2

End of the pipe socket

3.2.1

Front surface of the pipe socket

4

Protective tube

4.1

End section

4.2

Middle section

4.3

End

5

Wall or floor element

6

external wall

7

Media lines

8th

Building interior

9

Building exterior

12

Press seal

15

opening

12.1

Elastomer body

12.2, 12.3

Clamp body

23

Additional pipe socket

24

Protective tube (additional, not installed according to the invention)

25

sleeve

30

Longitudinal axis

31

Longitudinal direction

32

Radial directions

40

Exterior wall surface

41

Elevations in the final section

42

Elevations in the middle section

43

Latest surveys

45

Interior wall surface

50

Sealing element

50.1

Mounting section

50.1.1

Arched exterior wall

50.2

Connecting section

50.3

Cover section

50.3.1

Sloping insertion surface

55

Groove

Claims (13)

Use of an implementation system (1), which a passage (2) for a wall or floor element (5) with a pipe socket (3) and has a protective tube (4) which has a corrugated outer wall surface (40) at least in a central section (4.2), wherein the middle section (4.2) and an end section (4.1) of the protective tube (4) adjoining this towards one end (4.3) of the protective tube (4) are formed monolithically with one another, when used i) the pipe socket (3) is installed in a wall or floor element (5), ii) the end section (4.1) of the protective tube (4) is pushed onto the pipe socket (3), wherein the protective tube (4) also has a corrugated outer wall surface (40) in the end section (4.1), viewed in a longitudinal section, and wherein, viewed in the longitudinal section, the elevations (41) forming the corrugated outer wall surface (40) in the end section (4.1) have a lower height h than the elevations (42) forming the corrugated outer wall surface (40) in the middle section (4.2). Use according to Claim 1 , in which a last elevation (43) of the corrugated outer wall surface (40) in the end section (4.1), which is located at the end (4.3) of the protective tube (4), has a lower height h than the rest of the corrugated Outer wall surface (40) in the end section (4.1) forming elevations (41). Use according to one of the preceding claims, in which an inner wall surface (45) of the protective tube (4) opposite the outer wall surface (40) is smooth at least in the end section (4.1). Use according to Claim 3 in which the inner wall surface (45) is also smooth in the middle section (4.2) and runs without offset between the end and the middle section (4.1, 4.2). Use according to one of the preceding claims, in which a sealing element (50) is arranged between the pipe socket (3) and the pushed-on end section (3.2), which extends over at least 1 cm in the longitudinal direction (31) of the protective pipe (4). Use according to Claim 5 , in which the sealing element (50) in step ii) sits on the pipe socket (3) and the end section (4.1) of the protective tube (4) is pushed onto the sealing element (50). Use according to Claim 5 or 6 , in which a fastening section (50.1) of the sealing element (50) sits in a groove (55) which is provided in an outer casing surface (3.1) of the pipe socket (3), wherein an outer wall (50.1.1) of the fastening section (50.1) bulges outwards away from the groove (55) when viewed in a longitudinal section. Use according to one of the preceding claims, in which a sealing element (50) is arranged between the pipe socket (3) and the pushed-on end section (4.1), the sealing element (50) extending over an axial section at one end (3.2) in any case after step ii). ) of the pipe socket (3), onto which end (3.2) the protective ear (4) is pushed, and a covering section (50.3) of the sealing element (50) has an end face (3.2.1) of the pipe socket (3) at this end (3.2 ) at least partially covered. Use after Claim 8 , in which the covering section (50.3) forms an insertion surface (50.3.1) which is inclined towards the inner volume of the pipe socket (3). Use according to one of the preceding claims, in which the corrugated outer wall surface (40) forming elevations (41-43) of the protective tube (4) are each self-contained all around. Use according to one of the preceding claims, in which the bushing (2) has a further pipe socket onto which an end section of a further protective pipe is pushed, the further protective pipe having a corrugated outer wall surface at least in a central section when viewed in a longitudinal section and this central section being monolithic the end section of the further protective pipe pushed onto the further pipe socket. Use according to one of the preceding claims, in which the wall or floor element (5) is an outer wall (6) or floor plate of a building. Use according to Claim 12 , in which, after steps i) and ii), a media line (7) is laid through the protective pipe (4) and the pipe socket (3), thus providing a media connection in the building.

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