DE20120639U1 - Device for sealing pipes in the area of passage through structures - Google Patents

Description

Device for sealing pipes in the area of passage through structures

The invention relates to a device for sealing pipes in the area of passage through buildings, in particular through walls, floors and shafts, consisting of an annular sleeve ("wall collar") which can be pulled onto the pipe, the inner diameter of which is adapted to the outer diameter of the pipe and on the outside of which at least one vertically projecting, in particular profiled, circumferential web is formed, and with at least one tensioning band with which the sleeve can be fastened to the pipe.

When integrating pipes into buildings, problems with leaks often arise. The same applies to the introduction of underground pipes into concrete walls or shafts due to the groundwater that is often present in such construction projects. The installation of pipes in swimming pools, dams or similar is even more critical. If the pipe is not adequately sealed against pressure water in all of these cases, water can penetrate the pipe into the building. Once such damage has occurred, it can only be repaired by costly repair of the leak.

For this reason, sleeves have already been proposed which are pulled onto a pipe to be sealed and by means of which pipelines

December 28, 2001

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patent attorneys

can be guided through concrete walls, floor slabs and shafts or integrated into them in a pressure-watertight manner. The sleeves, which are also referred to as "wall collars", have at least one circumferential web on their outside, with which the wall collar is integrated into a concrete wall, floor or the like.

In order to create a secure connection between the wall collar and the pipe, a tensioning system is provided, which consists of steel tensioning bands that are placed around the sleeve on both sides of the webs and pulled tight using tensioning tools. When the tensioning bands are installed, however, they can easily slip off the sleeves, which is often not noticed by the fitter, especially when the pipes are laid in hard-to-reach places, so that the sleeves can no longer be securely attached to the pipes to be sealed.

The object of the present invention is therefore to provide a device of the type mentioned at the outset, in which a secure connection of the steel band tensioning system with the sleeve is ensured.

This object is achieved according to the invention in that a projection is provided in the outer edge area of the sleeve, which projects in the same direction as the circumferential web. This ensures that the steel tensioning band is held securely on the sleeve, since the circumferential, vertically projecting projection on the edge of the sleeve prevents the steel tensioning band from slipping off the sleeve.

The device can be manufactured simply and inexpensively if, according to a preferred embodiment of the invention, the vertically projecting projection(s) are formed integrally with the sleeve.
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PATENT ATTORNEYS

The dimensions of the sleeve and the vertical projection on the edge of the sleeve must be selected so that the recess formed between the vertical projection and the adjacent circumferential web is suitable for accommodating a tensioning strap. If the recess is dimensioned accordingly, different steel tensioning straps can be used depending on the load that occurs.

Further features, advantages and possible applications of the invention will become apparent from the following description of two embodiments and the drawing.

Show it:

Fig. 1 is a longitudinal section through a device according to the invention with

a single vertically projecting circumferential web and

Fig. 2 shows a longitudinal section through a further embodiment of a device according to the invention with two vertically projecting circumferential webs.

The device shown in Fig. 1 consists of an annular sleeve 1 made of an elastomer material such as the ethylene-propylene elastomer EPDM or of polyethylene (PEHD) or polypropylene (PP). In practice, sleeves of this type are usually referred to as "wall collars". On the outside 2 of the sleeve 1, a vertically projecting circumferential web 3 is formed, on which profiles 4 are provided.

The web 3 passes over bevels 5 and 6 into recesses 7 and 8, which are formed on the outer edge 9 of the sleeve 1 by circumferential projections 10

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PATENT ATTORNEYS

and 11. The recesses 7 and 8 serve to accommodate tensioning straps (not shown). These are usually steel tensioning straps.

For pipes with larger diameters, correspondingly larger sleeves are used. One such sleeve 12 is shown in Fig. 2. The structure of the sleeve 12 is basically the same as that of the sleeve 1 shown and described in Fig. 1, so that identical parts are given the same reference numerals. However, the sleeve 12 has two vertically projecting webs 13 and 14 spaced apart from one another, which also have profiles 4. In the sleeves 12, the steel strips (not shown) are not only inserted into the recesses 7 and 8, but also into the recess 15 between the webs 13 and 14. On the sealing surface 16 of the sleeve 12, which comes into contact with the pipe to be sealed (also not shown), spaced-apart sealing lips 17 are formed in order to achieve a special sealing effect.

The installation of the sleeves ("wall collars") is carried out as described below:

The wall collars 1 and 12 are pulled onto a pipe (not shown) by hand and secured to the pipe using an associated steel band tensioning system. In order to achieve a pressure-water-tight connection, the pipe surface in the area where the wall collar rests must be clean, smooth and free of pores. If necessary, the pipe surface must therefore be cleaned and smoothed before pulling on the wall collar. Pushing the wall collar onto the pipe can be made easier by using neutral soap or another sliding aid. The wall collar must be positioned in the middle of the wall or similar to be sealed so that the concrete cover is at least 3 centimeters at every point of the wall collar. Then

28 December 2001 F 42 G 15

Claims (3)

1. Device for sealing pipes in the area of passage through buildings, in particular through walls, floors and shafts, consisting of an annular sleeve ("wall collar") which can be pulled onto the pipe, the inner diameter of which is adapted to the outer diameter of the pipe and on the outside of which at least one vertically projecting, in particular profiled, circumferential web is formed, and with at least one tensioning band with which the sleeve can be fastened to the pipe, characterized in that in the outer edge region ( 9 ) of the sleeve ( 1 ; 12 ) there is provided a projection ( 9 ) which projects in the same direction as the circumferential web ( 3 ; 13 , 14 ). 2. Device according to claim 1, characterized in that the vertically projecting projection(s) ( 9 ) are formed integrally with the sleeve ( 1 ; 12 ). 3. Device according to claim 1 or 2, characterized in that the recess ( 7 , 8 ) formed between the vertically projecting projection ( 3 ; 13 , 14 ) and the adjacent circumferential web ( 9 ) is suitable for receiving a tensioning strap.