AT522351A4 - Shaft bottom lining - Google Patents

Abstract

A shaft bottom lining (1), in particular for a sewer shaft, has a base body (2) which has at least one pipe connection opening (7). A tubular connecting piece (8) made of a flexible material with a first end (9) is attached to the pipe connection opening (7). The connecting piece (8) is from a first position, in which it is at least partially everted into the interior of the pipe connection opening (7), to a second position, in which it is arranged as an extension of the pipe connection opening (7) and from the base body (2) protrudes away, elastically deformable.

Description

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The invention relates to a manhole floor lining, in particular for a sewer manhole, with a

Base body which has at least one pipe connection opening.

Older design manholes that can be walked on, which are bricked, concreted or composed of molded concrete pieces, show signs of corrosion or wear and tear after a certain time due to environmental influences. In particular, access manholes for sewers, on whose bottoms channels are formed, which form connections between sewer pipes opening into the manholes, are additionally aggressive due to sewage

May contain substances subject to severe stress.

Corrosion attacks the surface of the material from which the shaft is built. In order to repair shafts that have been stressed by corrosion in this way, different rehabilitation methods are used. In addition to coating the existing building fabric with different materials, the renovation by inserting prefabricated ones belongs

State-of-the-art components in shaft floors.

In order to be able to carry out renovation work on the shaft bottom as effectively as possible on site, a prefabricated plastic shaft bottom lining, adapted to the shaft bottom to be renovated, is inserted into the shaft at the bottom of the shaft

arranged and filled with filling material, e.g. Concrete, backfilled.

Such a shaft bottom lining is made of EP, for example

3 382 116 A2 known.

In order to prevent the filling material from penetrating pipelines that open into the shaft and clogging them, a connection that is as tight as possible must be formed between the shaft bottom lining and each pipeline opening into the shaft.

To save time and resources, it is important to have a

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such a connection as simple, quick and reliable as possible

can be produced.

The invention is based on the object of providing a shaft bottom lining of the type mentioned at the outset, which can be connected more easily and quickly to a pipeline opening into the shaft than shaft bottom linings known from the prior art. Furthermore, the invention is based on the object of providing a method by means of which a shaft into which at least one pipeline opens, as effectively as possible with a

Shaft bottom lining can be lined.

This object is achieved according to the invention with a shaft bottom lining which has the features of claim 1

having.

Furthermore, this object is achieved with a method for lining a manhole, which has the features of claim 10,

solved.

Preferred and advantageous embodiments of the invention are

Subject of the subclaims.

According to the invention it is provided that a tubular connecting piece made of a flexible material with a first end is fastened to the pipe connection opening, and that the connecting piece from a first position, in which it is at least partially everted into the interior of the pipe connection opening, into a second position, in which it is arranged in an extension of the pipe connection opening and away from the base body

protrudes, is elastically deformable.

Such a shaft bottom lining can be simple and

quickly on site, i.e. in a shaft over that

Connect the connecting piece to a pipe opening into the shaft. Compared to manhole bottom linings with a rigid connecting piece, the manhole bottom lining according to the invention has the advantage that it takes up less space when the connecting piece is turned inside out and therefore does not have to be laboriously “threaded” into the manhole or into the pipeline with the connecting piece. Since the connecting piece is already connected to the base body, there is no need to attach or adapt a connecting piece when the shaft bottom lining has already been installed in the shaft, so that time

saved and the workload can be reduced.

The connecting piece is made in particular from such a flexible material, for example from synthetic rubber, in particular from ethylene-propylene-diene rubber (EPDM), and with such thick walls that it can be elastically deformed from the first position to the second position. In the context of the invention, elastic deformation is understood to be deformation in which essentially no plastic changes take place on or in the material. The connecting piece can in particular from the everted shape, in which an inside of the connecting piece faces outwards and an outside inward, into its original shape, in which the inside of the connecting piece faces inwards and the outside faces outwards

has to be everted.

Within the scope of the invention, the base body can have a tread surface and / or further pipe connection openings, with and / or without connecting pieces connected thereto. Furthermore, the base body can be elastically deformable (as for example in EP 3 382 116 A2) or essentially rigid (as in EP 1 880 829 A1 for example) and / or adhesive bridges on its outside

exhibit.

In particular, an embodiment is within the scope of the invention

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preferred, in which the base body has a pipe socket which forms the pipe connection opening, the connecting piece with its first end enclosing the pipe socket at least in sections. The resulting overlap area, in which the inside of the connection piece rests against an outside of the pipe socket, offers sufficient space to connect the connection piece to the pipe socket which forms the pipe connection opening. At the same time it becomes. ensures that no gap remains between the base body and the connecting piece through which, for example, groundwater or filler material into the interior of the

Can penetrate the base body or the pipe connection opening.

In a further possible, although not preferred embodiment, the connecting piece is arranged with its first end in the pipe socket and is enclosed by this. In this embodiment, too, an advantageous one

Overlap area formed.

In the invention, the connecting piece can also be arranged directly on the pipe connection opening, for example via a flange on the connecting piece, and glued to the base body

or welded or attached directly to the base body.

In a preferred embodiment, the connection piece is pressed against the pipe connection piece by an annular fastening element which is arranged around the first end of the connection piece and the section of the pipe socket received therein and is connected to it (in particular in a non-positive manner). Such a fastening element can be attached quickly and easily and ensures that the connection between the pipe socket and the connection piece goes around

is carried out evenly tight.

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The annular fastening element is preferably a clamp. In the context of the invention, ring-shaped is also understood to mean a band-shaped or approximately ring-shaped fastening element. The fastening element can also have the shape of a non-closed ring and / or can also consist of

be composed of several parts.

It is also possible, although not preferred, for the connecting piece to be glued or welded or welded to the pipe socket.

is formed directly on this.

It is particularly preferred if the connecting piece has, in the region of its first end, a radial groove which is arranged on the outside and in which the fastening element is received. Such a radial groove helps to position the fastener correctly and prevents it from slipping. of

Fastening element in the axial direction.

The radial groove can be, for example, an annular one. Recess in the wall of the connecting piece, or by two spaced apart and radially forming the radial groove

extending flanges be formed.

Embodiments are preferred in which the connecting piece has at least one, preferably two or more, flange-shaped lamella (s) on its outer side, which is directed outwards in the second position. The lamella runs or the lamellae run radially, in particular continuously, around the connecting piece. Such a lamella or lamellae help to anchor the connecting piece in a hardened filler material introduced between the shaft bottom lining and the shaft, increase the stability of the connecting piece and block the flow along

Groundwater on the outside of the connector.

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A further development is particularly preferred in which through-holes are / are arranged in the lamella (s). Such lamellas offer an even more firm hold in the hardened filler material, since this penetrates the through holes. The through holes running in the axial direction are preferably circular and in particular evenly distributed around the circumference. For example, at least four, eight or sixteen through holes per

Lamella ,.

In particular, within the scope of the invention, an embodiment is preferred in which the lamella (s) is / are arranged in a section of the connecting piece which connects to the pipe connection opening. In the context of the invention, a section that adjoins the pipe connection opening is understood to be a section which is arranged closer to the first end of the connecting piece than to a second end of the connecting piece. In embodiments in which the pipe connection opening is formed by a pipe socket, the section with the lamella or the lamellas is preferably outside the overlap area between the pipe socket and the connecting piece and closes directly on this

on.

In a particularly advantageous embodiment it is provided that the connecting piece tapers conically to a second end, which is opposite the first end. The connecting piece therefore has a larger outer diameter at the first end than at the second end. A connector. with a conical, second end area can

simply insert it into the pipeline opening into the shaft.

In the context of the invention it can be provided that the

Connector are elastically expanded at the second end

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can, and that in a central region of the connecting piece

Expansion element can be arranged for expanding.

The expansion element can for example be a fillable, in particular an inflatable, hollow element. With this, the connection piece can be supported from the inside and pressed against the inside of the pipe until a curable filler material filled between the shaft bottom lining and the shaft has hardened and / or until the connection piece

is glued or welded to the inside of the pipe.

Because the second end of the connecting piece can be elastically expanded, it can be molded with its outside against an inside of the pipe by means of a pressure acting from the inside, in order to form the tightest possible overlap area between the connecting piece and the pipe. By means of the expansion element, the connecting piece protruding into the pipeline can be quickly and easily pressed or pressed against the inner walls of the pipeline, so that the connection between the shaft bottom lining and the

Pipe is particularly tight.

The invention further relates to a method for connecting a shaft bottom lining, with a stationary pipeline opening into a shaft, in particular a sewer shaft, the shaft bottom lining having a base body

having at least one pipe connection opening.

The method according to the invention can for example be as follows

expire:

In a first step, the shaft bottom lining is inserted into the shaft. A tubular connector made of a flexible material that has a first end attached to the

Pipe connection opening is attached, takes a first

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Position. In this first position, the connection piece is at least partially turned inside out into the pipe connection opening, so that an inside of the connection piece outwards and an outside of the connection piece inwards:

shows.

In the next step, the shaft bottom lining is positioned in the shaft in such a way that the pipe connection opening is opposite

a pipeline opening into the shaft is arranged.

In a further step, the connecting piece is reshaped into the second position, for which it is everted out of the pipe connection opening so that it is arranged as an extension to the pipe connection opening. The base body preferably has a pipe socket which forms the pipe connection opening so that the connecting piece fastened to the pipe socket in the second position represents an extension of this pipe socket. In the second position, the connecting piece protrudes with its second end away from the base body and is at least partially inserted into the

Pipeline.

After that. the expansion element is introduced into the connecting piece in the form of a fillable hollow body. A reversibly expandable support element which can be used in one embodiment of the invention can encase the hollow body in such a way that the area between the pipe connection opening and the mouth is thereby

the pipeline is bridged.

The expansion element, which is designed as a hollow body, is then expanded until the outside of the connecting piece rests against the inside of the pipe. The support element which may rest on the inside of the pipe connection opening and the inside of the pipe limits the expansion

of the hollow element during the filling or expansion and

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prevents the connection piece in the area between the pipe connection opening and the pipeline to the outside

bulged or expanded.

The expansion element is inserted into the connection piece after the shaft bottom lining has been introduced into the shaft and the connection piece with the second end in the pipeline

has been positioned.

In the context of the invention, that state of the expansion element in which it is expanded enough to press the connecting piece against the inside of the pipe is regarded as an expanded state. The expansion element does not necessarily have to be as large as possible in the expanded state, which has the advantage that an expansion element for

different pipe diameters can be used.

The expansion element pushes radially outwards in the expanded state. As a result, the connecting piece is pressed from the inside against the inside of the pipe, so that a possible gap between the outside of the connecting piece and the

_ The inside of the pipe is closed or sealed.

Then between the shaft bottom lining and the

Well introduced a filling compound.

The filler compound is in particular a hardening filler compound which is introduced in the uncured or not solidified state and which surrounds the shaft bottom lining and the connecting piece in the hardened or solidified state on the outside. The filling compound is, for example, a mineral filling compound such as concrete or cement. If present, the flange-like lamellae of the connecting piece, which are arranged between the base body and the pipeline, are also arranged

are enclosed by the filler material.

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After the filling compound has hardened, the expansion element together with the support element is either reduced in size or not

expanded state removed from the connector.

Preferably, after removing the expansion element, an expandable sleeve is introduced into the connecting piece and then expanded so that the sleeve is positioned between the second end of the connecting piece and the inside of the pipe

formed step covered.

While the second end is expanded by the expansion element and pressed against the inside of the pipe, the connecting piece can be glued or welded to the inside of the pipe. In this case, it is possible - but not necessarily - to bring the

the sleeve covering the step can be dispensed with.

It is also conceivable within the scope of the invention that no expansion element at all is used, but rather only the sleeve covering the step is introduced into the connecting piece and expanded therein. The sleeve is designed in such a way that it presses the connection piece permanently against the inside of the pipe, so that when the filler material is introduced, no filler material can get past the connection piece into the pipeline. The sleeve preferably extends up to the pipe connection opening, so that the sleeve is the connecting piece

Introducing the filling material from the inside.

Further details, features and advantages of the invention emerge from the following description with reference to the attached drawings, in which preferred

Embodiments are shown. It shows:

Fig. 1 is a vertical section through a portion of a

“Shaft bottom lining according to the invention, in which a

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Connecting piece assumes a first position, and through a region of a manhole into which a pipeline opens,

FIG. 2 shows a further view of the section through the shaft bottom lining and the shaft according to FIG. 1, the connecting piece occupying a second position,

3 shows a third view of the section through the shaft bottom lining and the shaft according to FIG. 1, with an expansion element introduced into the connecting element in a non-expanded state,

4 shows a fourth view of the section through the shaft bottom lining and the shaft according to FIG. 1, with the expansion element in an expanded state,

5 shows a fifth view of the section through the shaft bottom lining and the shaft according to FIG. 1, with a sleeve introduced into the connecting element in a non-expanded state,

6 shows a sixth view of the section through the shaft bottom lining and the shaft according to FIG. 1, with a sleeve introduced into the connecting element in an expanded state,

7 is an isometric view of the connector, and FIG

FIG. 8 shows a detailed view of a partial area of the in FIG

shown connector.

1 shows a section of a shaft bottom lining 1 according to the invention with a base body 2, and a section of a shaft 3 into which a pipeline 4 opens, in a vertical section. The shaft bottom lining 1 is in

the shaft 3 for connection to the pipeline 4 is arranged. The base body 2 has a connection element 5 and one thereon

connected, for example glued to it or

welded, pipe socket 6 on.

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The pipe socket 6 forms a pipe connection opening 7 of the base body 2, which is opposite the pipe 4

is positioned.

It goes without saying that more than one pipe 4 can open into the shaft 3 and that the base body 2 accordingly also has several pipe connection openings 7 for the

Connect to the pipes 4 may have.

A tubular connecting piece 8 encloses the pipe socket 6 in sections with a first end 9. In an overlapping area 11 formed thereby, two spaced webs lying in radial planes are formed on the connecting piece 8, between which a radial groove 12 is formed. An annular, or at least approximately annular, fastening element 13 is received in the radial groove 12. The fastening element 13, which is for example a quick-release clamp, presses the connecting piece 8 firmly against the pipe socket 6, so that a connection that is tight all round

is formed between connector 8 and pipe socket 6.

The connecting piece 8 made of an elastic material assumes a first position in which it is at least partially into the interior of the pipe connection opening 7, i. into the pipe socket 6 that forms the pipe connection opening 7, is turned inside out or inside. With a second end 14, the connecting piece 8 protrudes into the interior of the base body 2, with an inside 15 of the connecting piece 8 facing outwards and an outside 16 of the connecting piece 8 when the section of the connecting piece 8 is turned over

Connector 8 faces inward.

In FIG. 2, the connecting piece 8 assumes a second position, namely the actual installation position, in which the outer side 16 follows over the entire length of the connecting piece 8

outside and the inside 15 faces inwards. The

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Connector 8 protrudes in its second position with the

second end 14 up into the pipeline 4.

The connecting piece 8 has a conical shape at least towards the second end 14, so that an outer diameter Di of the connecting piece 8 in the area of the first end 9 is larger,

as an outer diameter D2 of the connecting piece 8 in the area

of the second end 14 arranged in the pipeline 4.

On the outside 16 of the connecting piece 8, two flange-shaped lamellae 17 are arranged, which run radially around the connecting piece 8. The lamellas 17 are arranged in a section of the connecting piece 8 which is directly connected to the pipe connection opening 7, which is formed by the pipe socket 6

is, connects, and is located outside the pipe 4.

FIG. 3 shows the shaft bottom lining 1 according to the invention from FIG. 2 arranged in the shaft 3, wherein in the connecting piece 8 from the pipe connection opening 7 or the interior of the; Pipe socket 6 up to the second end 14 of the connecting piece 8, an expansion element in the form of a fillable hollow body 19 in a non-expanded or at least only partially

expanded state is arranged.

In the region of the gap between the pipe connection opening 7 and the pipeline 4 and ideally up to the pipe connection opening 7 and the pipeline 4, the hollow body 19 is supported by a reversibly expandable support element 20

encased.

The hollow body 19 can be filled via a line 24,

especially inflatable.

In Fig. 4, designed as a hollow body 19 takes expansion element

its expanded state, whereby the connecting piece 8

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bridged.

4 shows the shaft bottom lining 1 according to the invention, which is arranged in the shaft 3, after filling material 18, such as concrete, which has already hardened, between the shaft bottom lining 1 and. the shaft 3 was introduced, the filling material 18 encloses the base body 2, the pipe socket 6 and the section of the connecting piece 8 arranged between the pipe line 4 and the pipe socket 6. The lamellas 17 are also embedded or embedded in the filling material 18.

'Enclosed by this.

In FIGS. 5 and 6, the expansion element designed as a hollow body 19 has already been removed from the connecting piece 8 together with the support element 20 and the filling material 18 has already been removed

hardened.

An expandable sleeve 25 which is introduced into the connecting piece 8 is shown in FIG. 5 in an unexpanded or non-expanded state and in FIG. 6 in an expanded or expanded state. In the expanded state, the sleeve 25 covers one between the second end 14 of the connecting piece 8 and the inside of the pipe

21 level formed.

The sleeve 25 is preferably beveled or rounded in its end regions 22, so that there are no sharp edges between the sleeve 25 and the inside of the pipe 21 on the one hand and that which would favor the accumulation of deposits

Connector 8 is formed on the other hand.

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15 5 33 3308042 3 Sofm e. .. ° .. ... ° FIGS. 7 and 8 show the connecting piece 8 without the remaining shaft bottom lining 1, as well as a detailed section

A of the connector 8 in an enlarged view.

The lamellae 17 of the connecting piece 8, which are arranged in the region near the first end 9, have through holes 23. These are circular in FIGS. 5 and 6 and evenly distributed in the circumferential direction, but can also be one

have a different shape or distribution.

The connecting piece 8 is shown in FIG. 5 in its second position, in which the outer side 16 faces outward and the inner side 15 faces inward over the entire length of the connecting piece 8. The overlap section 11, in which the radial groove 12 is arranged, is neither turned inside out in the first position nor in the second position, so that in the overlap area 11 of the connecting piece 8 the

The outside 16 faces outwards and the inside 15 faces inwards.

16 08 35 Siizes * r 3 Sue 0 "500 ° 4% 00" de S List of reference symbols 1 manhole bottom lining 2 base body 3 manhole i 4 pipeline 5 connection element 6 pipe socket 7 pipe connection opening 8 connection piece 9 first end 10 zz. 11 Overlap area 12 Radial groove 13 Fastening element 14 Second end 15 Inside 16 Outside 17 Lamella 18 Filler material 19 Hollow body 20 Support element 21 Inside of pipe 22 End area 23 Through hole 24 Line 25 Sleeve Dı1,2 outside diameter (area first end,

Second end area)

Claims (1)

Patent claims: Manhole bottom lining (1), in particular for a sewer manhole, with a base body (2) which has at least one pipe connection opening (7), characterized in that a tubular connecting piece (8) made of a flexible material with a first end on the pipe connection opening (7) (9) is attached, and that the connecting piece (8) from a first position, in which it is at least partially everted into the interior of the pipe connection opening (7), to a second position in which it is arranged as an extension of the pipe connection opening (7) is and from the base body (2) protrudes away, is elastically deformable. Shaft bottom lining according to claim 1, characterized in that the base body (2) has a pipe socket (6) which forms the pipe connection opening (7), and that the connecting piece (8) with its first end (9) along the pipe socket (6) at least part of his Length encloses. Shaft bottom lining according to claim 2, characterized in that the connecting piece (8) is arranged by means of an annular fastening element (13), preferably a clamp, arranged around the first end (9) of the connecting piece (8) and the section of the pipe socket (6) received therein , pressed against the pipe socket (6) and with this is connected. Shaft bottom lining according to claim 3, characterized in that the connecting piece (8) has a radial groove (12) in the area of its first end (9), and that the fastening element (13) is in the radial groove (12) is recorded. Scanned on 22-18-2819-88860186953 .BBDBAGBM ® eo ... "0 ...%. °. .O@ e 00 18: ss 88.0, 0 °. ® box 8.990 8> ao 8 Shaft bottom lining according to one of claims 1 to 4, characterized in that the connecting piece (8) on an outer side (16) directed outwards in the second position has at least one, preferably two or has more, flange-shaped lamella (s) (17). Shaft bottom lining according to claim 5, characterized in that through holes in the lamella (17) (23) are arranged, which are preferably circular. Shaft bottom lining according to claim 5 or 6, characterized characterized in that the lamella (17) is in one section of the connecting piece (8) is arranged, which is attached to the Pipe connection opening (7) connects. Shaft bottom lining according to one of Claims 1 to 7, characterized in that the connecting piece (8) to a second, the first end (9) opposite The end (14) tapers conically. Shaft bottom lining according to claim 8, characterized in that the connecting piece (8) can be expanded elastically at the second end (14), and that in the second end (14) an expansion element for expanding the second End (14) can be arranged. Method for connecting a shaft bottom lining (1), with one in a shaft (3), in particular one Sewer shaft, opening, stationary pipeline (4), wherein the shaft bottom lining (1) has a base body (2) with at least one pipe connection opening (7), characterized by the following steps: a) Introducing the shaft bottom lining (1) into the Shaft (3), where a. tubular connector 12. 13. 14th Scanned on 22 / 18-2819-888810894 .BENDABAB ' 18738 15.004105 Ka (8) made of a flexible material which has a first end (9) attached to the pipe connection opening (7), assumes a first position in which it is at least partially turned inside out into the interior of the pipe connection opening (7), and b) elastic deformation of the connecting piece (8) so that the connecting piece (8) assumes a second position in which it is arranged as an extension of the pipe connection opening (7) and away from the base body (2) and with a second end (14) protrudes into the pipeline (4). Method according to claim 10, characterized in that after step b) at least one, preferably more than one, flange-shaped lamella (17) arranged on the connecting piece (8) between the base body (2) and the Pipeline (4) is arranged. Method according to Claim 10 or 11, characterized in that step b) is followed by step c) in which the second end (14) received in the pipeline (4) is expanded by an expandable expansion element introduced into the connecting piece (8) so that the connecting piece (8) at least in a central region between its first end (9) and its second end (14) from the inside is supported. Method according to claim 11 or 12, characterized in that after step b) and optionally after step c) a filler compound (18), in particular a mineral filler compound, between the manhole bottom lining (1) and the manhole (3) (18), is introduced. Method according to claim 13, characterized in that the filling compound (18) is a hardening filling compound (18), 16. 17th Last seen on 22 / 18-2819-888818895 .BBBOBANB 28 3: 15.2. . °°. ° obs in particular concrete or cement, which is introduced in the uncured state, that the filling compound (18) after introduction, preferably independently, hardens, and that the filling compound (18) in the hardened = State that is arranged outside the pipe (4) The connecting piece (8) encloses at least some sections, with any lamellas (17) that may be present from the cured filling compound (18) are enclosed. Method according to Claims 12 and 14, characterized in that the expansion element used in step c) is a fillable, in particular inflatable, hollow body (19) which runs from the pipe connection opening (7) to the second end of the connecting piece (8), and that after the filler material (18) has hardened, the hollow body (19) in the non-expanded state again out of the connecting piece (8) is removed. A method according to claim 15, characterized in that the hollow body (19) is encased by a reversibly stretchable support element (20) bridging the area between the pipe connection opening (7) and the pipe (4), which causes the connecting piece (8) to bulge during filling of the hollow body (19) in this area is prevented. Method according to one of claims 12 to 14, characterized in that the connecting piece (8) by the expansion element, which is for example an inflatable hollow body (19) is, in the expanded state, against the Press the inside of the pipe (21) until the connection piece (8) is glued or welded to the inside of the pipe (21), and that the expansion element is then removed from the connecting piece (8) again in the non-expanded state Will get removed. Scanned on 22 / 18-2819-888810896 .BANBABAB ' Method according to one of Claims 11 to 17, characterized in that a sleeve (25) is inserted into the connecting piece (8) arranged in the pipeline (4); is introduced and then widened, so that the sleeve (25) creates a gap between the second end (14) of the connecting piece (8) and the inside of the pipe (21) formed step is covered.