CH648103A5 - Method for producing a fireproof compartmentalisation of an orifice for a line in a building part, and a device for carrying out the method - Google Patents

Abstract

When casting the building body (7) a part (8, 28) is cast into the body (7) on site. This part (8, 28) has a tubular sheath (28) which is filled with foam material (8) and holds the latter compressed transversely to the axial direction of the sheath. While the part (8, 28) is being cast in, the sheath is arranged such that its longitudinal axis runs approximately at right angles to the opposite surfaces of the building body (7), so that the line (9) can pass through the foam material (8) of the cast-in part (8, 28). <IMAGE>

Description

** WARNING ** beginning of DESC field could overlap end of CLMS **.

PATENT CLAIMS 1. A method for producing a fireproof partitioning of a penetration (17) for a line (9) in a building part (27) with a cast building body (7), wherein a rubber-elastic, fire-resistant foam material (8) is arranged in the penetration (17) , characterized in that when the building body (7) is cast, a part (8, 28) is poured into place in the building body (7), the part (8, 28) has a tubular casing (28) which is connected to the foam material ( 8) is filled and holds the latter squeezed transversely to the axial direction of the casing, and that when the part (8, 28) is poured in, the casing is arranged so that its longitudinal axis is approximately perpendicular to the opposite surfaces of the building body (7) around the line (9) to be able to pass through the foam material (8) of the cast-in part (8, 28).

2. The method according to claim 1, characterized in that the part (8, 28) is cut into a length corresponding to the thickness of the building body (7) before it is poured into this body (7).

3. Device for performing the method according to claim 1 or 2, characterized by a part (8, 28) with a tubular casing (28) which is filled with a rubber-elastic, fire-resistant foam, the casing (28) the foam (8 ) pressed together transversely to the longitudinal axis of the casing.

4. The device according to claim 3, characterized in that the casing (28) is designed for a form-fitting holder when pouring into the building body (7).

5. The device according to claim 4, characterized in that the casing surface is corrugated or ribbed in its longitudinal direction.

6. The device according to claim 3, characterized in that the part (8, 28) is circular in cross section.

7. The device according to claim 3, characterized in that the part (8, 28) is rectangular in cross section.

The invention relates to a method for producing a fireproof partitioning for a line, such as e.g. an electrical cable, in a part of the building with a cast building body, wherein a rubber-elastic, fire-resistant foam material is arranged in the penetration. The invention further relates to an apparatus for performing the method.

Penetrations, i.e. The holes in the walls or ceilings allow electrical cables, pipes, ventilation ducts and other building elements to pass through from one room to the other and always pose a great risk in the event of a fire, since they represent obvious paths for both smoke and flame to spread. It is therefore of crucial importance for fire protection that such penetrations are closed off or partitioned off in such a way that the spread of smoke and flames is effectively prevented.

For the penetrations, a recess is usually formed in a wall or the like during casting, masonry or the like. Alternatively, a penetration can also be cut out of the completely cast or finished wall. In a later phase of construction, lines are inserted through these penetrations, and then the penetration is sealed or closed in a fire-retardant manner or in a fire-proof manner by the free space between the lines and the wall of the penetration being sealed with a fire-proof one Filler is filled.

It is known to attach a clamping frame in the penetration. This frame is filled with several parallelepipedic blocks. At least some of these blocks are divided and have opposing semicircular recesses for receiving a line. The cylindrical space thus formed between them Block halves are filled with a cylindrical sealing body, which can be removed to make room for a pipe. By pinching the Frame the desired tight engagement between the Blocks and the lines. The disadvantage with such Clamping frame, however, is that the intended Blocks only provide a seal for certain cable or wire dimensions and for a certain number of cables, which in turn has led to the fact that Adding supplementary cables with one A complete block is removed so that the frame Sealing between the cable and the neighboring ones Blocks is no longer effective. Furthermore, it is often observed that blocks were lost and were not replaced, so that a continuous opening was created in the fire-protected penetration, which nullifies the fire protection or the fire-retardant function of the device.

It is also known (GB-PS 953 869) insulating washers Use rubber to seal cable glands. Here, a tubular rubber plug is pressed into the penetration and then a group of Cables forced through the hole in the plug. At This method is not suitable for fire protection seals because the cables usually have to be pulled a long way through the plug and because a new penetration is created each time and a new one Plug must be provided if another cable group is to be pulled through the wall.

It has therefore developed a molding technique in situ, in which the cables or lines are arranged in the penetration and the latter is temporarily sealed by formwork, after which a fire-resistant silicone rubber is foamed in situ in the penetration.

This technique was developed by the applicant and has - the designation fire protection system FC-225, where a Silicone rubber is used, which is commercially available under the Designation Dow Corning 3-6548 RTV is available.

However, if later, e.g. If a line is to be laid through a wall, a further penetration must be made for it, e.g. in an existing wall and one Sealing the penetration using the FC 225 technology. This is particularly difficult if the Wall is made of concrete, and this method is expensive, not least with regard to the wall cladding, such as Plaster and wallpaper that are often damaged and need to be replaced.

On the other hand, a hole can be drilled in a fire seal of an existing penetration, the Annular gap between the hole and the cable after the Through the cable is sealed.

The object of the invention is to create a new one Technology for closing penetrations with Fire protection, taking into account the disadvantages mentioned above, reduced or eliminated.

This object is achieved according to the invention in a method according to the preamble of claim 1 in that when casting the building body a part in the The building body is poured into place, the part has a tubular sheathing with the foam

material is filled and holds the latter squeezed transversely to the axial direction of the casing, and that when the part is poured in, the casing is arranged so that its longitudinal axis is approximately perpendicular to the opposite surfaces of the building body in order to be able to pass the line through the foam material of the cast part .

The line can be passed through the foam in the molded part e.g. in such a way that an essentially tubular mandrel is driven through the part, its driving end being provided with a conical driving-in tip, the central cavity of the mandrel being exposed, i.e. by removing the driver tip, the line is passed through the mandrel and the mandrel is withdrawn from the part so that the foam resiliently engages with the line against the line. The tubular wall of the mandrel is then opened in order to remove the tool from the line through it. A tool for guiding the line through the part thus has e.g.

an essentially tubular, axially slotted mandrel with a conical driver tip which is detachably adapted to the driver end of the device.

In the method according to the invention, parts are used which can advantageously be manufactured in the factory, that is to say under easy and easily controllable conditions for the foaming process. The parts can be manufactured in lengths which correspond to the thickness of the building bodies in which they are to be cast, i.e. Blocks made of ventilated concrete, e.g. Blocks made of Siporex ~, or wall blocks or so-called floor planks, which are made of concrete or gas concrete. On the other hand, the parts can also be produced in continuous lengths and brought to the construction site, where they can then be cut to length, in order to insert them into a wall or floor that is cast in concrete on site.

The device according to the invention for carrying out the method according to the invention has a part with a tubular casing which is filled with a rubber-elastic, fire-resistant foam, the casing holding the foam compressed transversely to the longitudinal axis of the casing.

The sheathing of the part is expediently designed for a form-fitting holding when pouring into the building body and the sheathing surface can then be corrugated or ribbed in its longitudinal direction.

The method according to the invention permits the preparation of parts of a building through which a line can be passed in a simple manner.

According to a first embodiment, the part can be cast into a building body, e.g. in a block made of ventilated concrete or foam concrete. If a wall is to be constructed from such blocks, it can be provided at selected locations with blocks which are provided with the prefabricated parts mentioned.

According to a second embodiment, the prefabricated part can be arranged in a concrete wall in the manner mentioned above, before it is cast in situ in a conventional manner.

Parts of the building constructed in this way have adequate fire protection (no open penetrations) as soon as they are completed. The fire-resistant foams that are useful for the parts have a high density and a high proportion of closed pores, which results in sufficient noise insulation for the penetrations. The cast-in parts can optionally be easily broken through, so that a further line can easily be put through the penetration, which is immediately sealed against fire.

Further details of the present invention will become apparent from the following description in conjunction with the drawings. Show it: Figure 1 is an end view of a fire-resistant closure member. Fig. 2 is a section along the line II-II in Fig. 1; 3 shows a part of a building in the form of a wall which has been built up with the aid of building bodies, including a fire-proof closure part; 4 shows an axial section through a prefabricated part as it is cast into a building body or part of a building, and FIGS. 5 to 8 show sectional views which correspond to those of FIG. 4 and which illustrate the sequence of the work, using a penetration tool to pass a pipe through the foam of the part molded in the building body.

1 and 2 show an axially corrugated sheath 28 made of a thermoplastic such as e.g. Polyethylene, is produced. The inside of the casing 28 is filled with a fire-resistant silicone foam which is foamed in situ in the casing so that the hardened foam 8 is pre-compressed by the casing 28.

When building the building body 7 in the factory (see Fig. 3), e.g. aerated or foam concrete, the part formed by the casing 28 and the foam 8 can be poured into such a body. The building bodies 7 provided with such molded parts 8, 28 can be used together with the ordinary building bodies 7 'to build a building part 27, e.g. a partition in a building. A building body 7 with parts 8, 28 can thus be provided at points where there is reason to believe that fire-proof penetrations for cables will be necessary in the future.

As shown in Fig. 4, a part 8, 28 can also be cast in place in components, e.g. Concrete walls, the peripheral parts of the part 8, 28 forming a penetration 17 in the building part 27. The foam 8 is conveniently made from a silicone foam commercially available under the designation Dow Corning 3-6548 RTV, which foam is conveniently molded in place in the jacket 28, according to the instructions in Dow Corning publication FC-225.

FIG. 5 is a sectional view corresponding to FIG. 4, but also shows a tool for passing a line through the foam 8. The tool consists of an essentially tubular mandrel or drawing mandrel 1 with an axial slot 3. The driver end of the mandrel 1 is located a releasable conical driver tip 2, and radial flange elements 6 are provided at its rear end. The tool is driven through the part 8 in the direction shown by the arrow until the tip 2 comes out of the foam 8. A line 9 can then be passed through the central cavity of part 1, as shown in FIG. 6, with the removable tip 2 being pushed out from the end of part 1 with the aid of line 9. The line 9 can then be passed through in the desired length, the radial flange elements 6 preventing the part 1 from being pulled through the foam part 8 by friction against the line 9.

The part 1 is then withdrawn, as shown in FIG. 7, the foam 8 returning elastically or resiliently in sealing engagement against the line 9. When the part 1 is completely removed from the foam part 8, the axial slot 3 of the part can be widened by hand so that the part can be detached therefrom transversely to the line, as shown in FIG. 8. The part 1 preferably has a joint 4 opposite the slot 3 in order to facilitate its opening.

The term line is used to refer to an electrical cable, a pipe, a ventilation guide or the like. The term line can of course also be a group of these parts, e.g. a group of electrical cables.

The tool is expediently made of an electrically insulating material, such as e.g. Plastic, and preferably has a low friction against the silicone foam part 8, polytetrafluoroethylene is considered as a suitable material for part 1 of the tool. The described fire-proof closure part can have essentially any desired cross-sectional shape.

The cross section of the part is preferably circular, but square, rectangular or oval shapes are also conceivable, for example.

By keeping the foam compressed in the casing, two advantages have been gained, firstly that the foam expands and fills the penetration if the casing should be destroyed by fire or the penetration cross section e.g.

should be increased by thermal expansion, and secondly that the foam offers a good grip or a good clamping against the lines, which prevents easy pulling of the lines out of the penetration.

Claims (7)

PATENT CLAIMS 1. A method for producing a fireproof partitioning of a penetration (17) for a line (9) in a building part (27) with a cast building body (7), wherein a rubber-elastic, fire-resistant foam material (8) is arranged in the penetration (17) , characterized in that when the building body (7) is cast, a part (8, 28) is poured into place in the building body (7), the part (8, 28) has a tubular casing (28) which is connected to the foam material ( 8) is filled and holds the latter squeezed transversely to the axial direction of the casing, and that when the part (8, 28) is poured in, the casing is arranged so that its longitudinal axis is approximately perpendicular to the opposite surfaces of the building body (7) around the line (9) to be able to pass through the foam material (8) of the cast-in part (8, 28). 2. The method according to claim 1, characterized in that the part (8, 28) is cut into a length corresponding to the thickness of the building body (7) before it is poured into this body (7). 3. Device for performing the method according to claim 1 or 2, characterized by a part (8, 28) with a tubular casing (28) which is filled with a rubber-elastic, fire-resistant foam, the casing (28) the foam (8 ) pressed together transversely to the longitudinal axis of the casing. 4. The device according to claim 3, characterized in that the casing (28) is designed for a form-fitting holder when pouring into the building body (7). 5. The device according to claim 4, characterized in that the casing surface is corrugated or ribbed in its longitudinal direction. 6. The device according to claim 3, characterized in that the part (8, 28) is circular in cross section. 7. The device according to claim 3, characterized in that the part (8, 28) is rectangular in cross section. The invention relates to a method for producing a fireproof partitioning for a line, such as e.g. an electrical cable, in a part of the building with a cast building body, wherein a rubber-elastic, fire-resistant foam material is arranged in the penetration. The invention further relates to an apparatus for performing the method. Penetrations, i.e. The holes in the walls or ceilings allow electrical cables, pipes, ventilation ducts and other building elements to pass through from one room to the other and always pose a great risk in the event of a fire, since they represent obvious paths for both smoke and flame to spread. It is therefore of crucial importance for fire protection that such penetrations are closed off or partitioned off in such a way that the spread of smoke and flames is effectively prevented. For the penetrations, a recess is usually formed in a wall or the like during casting, masonry or the like. Alternatively, a penetration can also be cut out of the completely cast or finished wall. In a later phase of construction, lines are inserted through these penetrations, and then the penetration is sealed or closed in a fire-retardant manner or in a fire-proof manner by the free space between the lines and the wall of the penetration being sealed with a fire-proof one Filler is filled. It is known to attach a clamping frame in the penetration. This frame is filled with several parallelepipedic blocks. At least some of these blocks are divided and have opposing semicircular recesses for receiving a line. The cylindrical space thus formed between them Block halves are filled with a cylindrical sealing body, which can be removed to make room for a pipe. By pinching the Frame the desired tight engagement between the Blocks and the lines. The disadvantage with such Clamping frame, however, is that the intended Blocks only provide a seal for certain cable or wire dimensions and for a certain number of cables, which in turn has led to the fact that Adding supplementary cables with one A complete block is removed so that the frame Sealing between the cable and the neighboring ones Blocks is no longer effective. Furthermore, it can often be observed that blocks were lost and not replaced, so that a continuous opening was created in the fire-protected penetration, which nullifies the fire protection or the fire-retardant function of the device. It is also known (GB-PS 953 869) insulating washers Use rubber to seal cable glands. Here, a tubular rubber plug is pressed into the penetration and then a group of Cables forced through the hole in the plug. At This method is not suitable for fire protection seals because the cables usually have to be pulled a long way through the plug and because a new penetration is created each time and a new one Plug must be provided if another cable group is to be pulled through the wall. It has therefore developed a molding technique in situ, in which the cables or lines are arranged in the penetration and the latter is temporarily sealed by formwork, after which a fire-resistant silicone rubber is foamed in situ in the penetration. This technique was developed by the applicant and has - the designation fire protection system FC-225, where a Silicone rubber is used, which is commercially available under the Designation Dow Corning 3-6548 RTV is available. However, if later, e.g. If a line is to be laid through a wall, a further penetration must be made for it, e.g. in an existing wall and one Sealing the penetration using the FC 225 technology. This is particularly difficult if the Wall is made of concrete, and this method is expensive, not least with regard to the wall cladding, such as Plaster and wallpaper that are often damaged and need to be replaced. On the other hand, a hole can be drilled in a fire seal of an existing penetration, the Annular gap between the hole and the cable after the Through the cable is sealed. The object of the invention is to create a new one Technology for closing penetrations with Fire protection, taking into account the disadvantages mentioned above, reduced or eliminated. This object is achieved according to the invention in a method according to the preamble of claim 1 in that when casting the building body a part in the The building body is poured into place, the part has a tubular sheathing with the foam ** WARNING ** End of CLMS field could overlap beginning of DESC **.