DE102022107221A1 - Use of a feedthrough system - Google Patents

Abstract

The invention relates to the use of a feedthrough system which has a feedthrough for a wall or floor element with a pipe socket and a protective tube which has a corrugated outer wall surface at least in a central section, the middle section and an end section adjoining this towards one end of the protective pipe of the protective tube are formed monolithically with one another, in which useiii) the pipe socket is installed in a wall or floor element,iv) the end section of the protective tube is pushed onto the pipe socket.

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 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 there is no separate sleeve attached to this protective pipe to connect it to the pipe socket, but rather the protective pipe itself is pushed directly onto the pipe socket. In experiments alternative to the present subject, however, the inventors first attached a sleeve to the protective pipe, which sleeve could then be pushed onto the pipe socket of the bushing. This has shown relatively high pull-off forces during pull-out or pull-off tests. Surprisingly, the inventors were also able to observe good results in the pull-out tests in comparative tests in which they pushed the protective pipe 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 the present case, the end section of the protective tube is pushed on; In comparison, inserting it into the pipe socket itself or a separate sleeve could possibly offer an additional fastening option, namely allowing it to lock into the corrugated outer wall surface. However, pushing it on is advantageous in that the protective tube can therefore be provided with a larger inner diameter, which simplifies the later passage of the line.

Preferred embodiments can be found in the dependent claims and the entire disclosure, although when presenting the features, a detailed distinction is not always made between usage and method or even device aspects; In any case, the disclosure must 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. follows the pipe socket radially, can, for example, have an axial length of at least 4 cm or 5 cm, with possible upper limits of, for example, a maximum of 30 cm, 20 cm or 15 cm. The protective tube, at least in the end section, preferably has 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, for example, by at least 0.5%, 0.75% or 1% be larger to make it easier to slide). In absolute values, the difference in diameter can be, for example, at least 1 mm and (regardless of this) z. B. make up a maximum of 3 mm or 2 mm. The inner diameter of the protective tube can be, for example, at least 5 cm, 6 cm or 7 cm, possible upper limits are, for example, at most 20 cm, 15 cm or 10 cm.

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 tube is preferably simply pushed onto the pipe socket, but is not attached separately again. For example, no clamping means is then provided on the protective tube in order to press the protective tube radially inwards against the pipe socket, for example no clamping clamp. For example, no clip is or will be provided which, on the one hand, engages in the corrugated outer wall surface of the protective tube and, on the other hand, is or is fixed in position relative to the pipe socket in order to hold the two together in an axially positive manner. In other words, the protective pipe is attached to the pipe socket simply by pushing it onto the pipe socket, so apart from the soil material (e.g. gravel, gravel, etc.) that is filled around the feedthrough system after being plugged together, the two are not additionally relative to one another fixed in position or attached to each other.

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 formed 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 a preferred embodiment, 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 a preferred embodiment, 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 bushing, the space conditions can generally be cramped, particularly in the case of several pipe sockets arranged next to one another, so that 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.

For example, the elevations in the end section can be at least 10%, 15%, 20% or 25% lower in height than the elevations in the middle section. (Possible upper limits can be, for example, a maximum of 70%, 60% or 50%). In absolute values, the height difference can be, for example, 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 the same period width from elevation to elevation despite the different height when viewed in the longitudinal section.

In a preferred embodiment, a last elevation in the end section, which sits directly at the end of the protective tube, has a reduced height compared to the other elevations of the end section. If the latter are already designed with a reduced height compared to the middle section, there can be first elevations with a first height in the middle section, and second elevations with a second height in the end section that are smaller than that first height, and then at the end in the end section there is a third elevation 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 of 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 tube can, for example, be advantageous in terms of manufacturing history, namely marking the transition to the next tube in a tube manufactured in an endless process. The pipes can be separated from each other there; beforehand, two such elevations are preferably next to each other; Viewed in longitudinal section, a smaller curvature can be formed between them than between the other elevations. A sawing tool, for example, can then be reliably guided.

According to a preferred embodiment, an inner wall surface of the protective tube is smooth in the end section, i.e. it has a straight course when viewed in a longitudinal section. This can, for example, simplify the sliding and in particular 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 passage of a media line and/or be advantageous because of the uniform production. Particularly preferably, the smooth inner wall surface between the end and middle sections runs without any offset, i.e. without any radial offset; so there is no step in between. Viewed in longitudinal section, e.g. B. a continuous, in particular axially parallel straight line can be placed in the inner wall surface of the end and middle sections.

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

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

In general, the sealing element could, for example, 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 pipe is pushed on. In general, it can also be formed in one piece with the pipe socket, for example 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 previously separate component.

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 presses this outer wall radially inwards, whereby the fastening section is pressed into the groove in a good seal. 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 which 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 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 into the building through the protective pipe.

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 designed as a corrugated tube in a preferred embodiment. The elevations provided in the middle section, preferably also in the end section, are therefore each self-contained all around.

The present item can be advantageous in particular in the case of a multiple feedthrough, which has several pipe sockets that are generally aligned parallel to one another. In total, for example, at least 2 or 3 and generally not more than 5 pipe sockets can be provided, with exactly 4 pipe sockets being particularly preferred. A respective protective tube is then preferably placed on each of the pipe sockets, which can be equipped in the manner described here. In this multiple variant, the elevations whose radial height is reduced in the end section can be particularly advantageous because they enable the pipe sockets to be arranged relatively close to one another and thus a compact structure. As a result, for example, an opening in the wall or floor element into which the bushing is installed does not have to be planned too large.

According to a preferred embodiment, the floor element in question is a floor plate of a building, i.e. its foundation plate, and/or the wall element is an outer wall of the building, preferably a basement wall. Particularly preferably, the object can be aimed at a wall duct that is installed in an outer wall of a building. This is preferably done after this outer wall has been manufactured, so the bushing is inserted into a through opening 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 opening 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 z. B. from a street-side connection into the interior of the building. This means that a corresponding media connection is provided inside the building, for example the electricity, water, gas or telecommunications connection. In an alternatively preferred embodiment, the bushing can also be used as a building version, i.e. the respective medium can be brought into the outside area of the building via the bushing, for example in order to provide a power connection in the garden. Regardless of whether it is a building entry or construction, the media line is then preferably sealed relative to the pipe socket with a sealing element; this then closes the internal volume of the pipe socket to the inside of the building.

The invention is explained in more detail below using an exemplary embodiment, with the individual features also in other combinations within the scope of the independent claims can be essential to the invention and no detailed distinction is made 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.

Shows in detail

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

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

The casing tube 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 axially enclosed 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 tube 3. During assembly, the bushing 2 with the press seal 12 and the pipe socket 3 is inserted from the inside of the building 8 into the opening 15 in such a way that the pipe socket 3 protrudes on the outside of the building 9.

On the outside of the building 9, the protective pipe 4 is then connected to the pipe socket 3, which in the present 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 picture, 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 tube 4 represents a simplification, and it also enables a larger inner diameter of the protective tube. The latter can be seen from the comparison; in the case of the sleeve 25, the protective tube 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, these sections 4.1, 4.2 being formed monolithically with one another, i.e. being formed from the same continuous material in relation to a longitudinal direction 31 parallel to the longitudinal axis 30. 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.

Both in the end and in the middle section 4.1, 4.2, the protective tube 4 is surrounded by a corrugated outer wall surface 40, but 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 last elevation 43, which has a further reduced height h compared to the remaining 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 that 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 are slightly different.

3b shows a detail of two protective tubes 2 immediately after production, before they are separated from each other. The corresponding separation point is 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 fastener supply section 50.1 has a curved outer wall 50.1.1, which can create a good seal with the protective tube and a hold. 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.

Reference symbol list

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

Interior of the building

9

Building exterior

12

Press seal

15

opening

12.1

Elastomer body

12.2, 12.3

Clamp body

23

Another 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 end section

42

Elevations in the middle section

43

Latest surveys

45

Interior wall surface

50

Sealing element

50.1

Fastening section

50.1.1

Arched exterior wall

50.2

connection section

50.3

Cover section

50.3.1

Sloping insertion surface

55

Nut

Claims (15)

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 it 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). Use after Claim 1 , in which the protective tube (4) also has a corrugated outer wall surface (40) in the end section (4.1) when viewed in a longitudinal section. Use after Claim 2 , in which, viewed in a 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 after Claim 2 or 3 , in which a last elevation (43) of the corrugated outer wall surface (40) in the end section (4.1), which lies 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). has elevations (41) forming the end section (4.1). 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 after Claim 5 , in which the inner wall surface (45) is also smooth in the middle section (4.2) and between the end and the middle section (4.1, 4.2) runs without any offset. 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 after Claim 7 , in which the sealing element (50) sits on the pipe socket (3) in step ii) and the end section (4.1) of the protective pipe (4) is pushed onto the sealing element (50). Use after Claim 7 or 8th , in which a fastening section (50.1) of the sealing element (50) sits in a groove (55) which is provided in an outer surface (3.1) of the pipe socket (3), an outer wall (50.1.1) of the fastening section (50.1) Viewed in a longitudinal section, it bulges outwards away from the groove (55). 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 10 , 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 (40-43) 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 after Claim 14 , 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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