METHOD FOR MANUFACTURING A SEALING ASSEMBLY

Description

Technical area

[0001] The invention relates to a method for fire-protection-compliant sealing (i.e., sealing off) of an opening through which a cable is routed in known substrates such as aerated concrete, drywall, timber construction, and others, for example in a wall or ceiling of a building or other room. Furthermore, the invention relates to a prefabricated sealing assembly for the same purpose and a method for its production. Technical background

[0002] State-of-the-art fire protection products designed for pipe and cable installations with a diameter of more than 32 mm are known, such as an approximately 125 mm wide fire protection bandage with an outer carrier or fabric layer and an intumescent material applied to it, which is applied in two layers around the pipe to be sealed in the area of ​​the opening. Such a fire protection bandage is known, for example, under the designation "Fire Protection Bandage CFS-B," which is also used here. Additional fastening and sealing materials, including acrylic sealants, are used to seal the opening. On the other hand, empty electrical conduits with a diameter of up to 16 mm are generally covered with a standard test configuration.

[0003] Fire protection for small or thin pipes in the intermediate diameter range (16 mm < Ø < 32 mm) is usually not specifically considered in innovative state-of-the-art solutions of this type, and is also not adequately reflected in the European Technical Assessment (ETA), the generally recognized proof of the technical suitability of a construction product within the meaning of the Construction Products Regulation in the EU member states. Common applications in this diameter range are mainly underfloor heating pipes, but also, for example, small supply lines in laboratories. Other examples include flexible electrical installation pipes, which are usually used for control cables for building services systems.

[0004] The use of a conventional fire protection bandage, such as CFS-B, as an intumescent product is suitable due to its ease of processing, but the required double-layer installation is usually over-dimensioned, especially since the installation has to take place on both sides of the penetration seal, i.e. on both sides of the passage opening to be sealed in accordance with fire protection requirements.

[0005] Document JP2000240854A shows a fire-resistant safety construction for the floor, with thermal expansion property, sealing compound with the required thickness and length, which is wrapped around the pipeline and fixed with adhesive tape.

[0006] In order to construct a fire-resistant seal (i.e., a fire-resistant seal or gasket) for a pipe penetration that meets the legal requirements for approval, a fire-resistant seal product is usually required for pipe diameters between 16 mm and 32 mm, as would be necessary for larger pipes. This means that the currently available technical solutions are oversized for this application. Furthermore, their installation usually involves the use of acrylic sealants, which represent a wet installation and are therefore inherently messy and require drying times.

[0007] Therefore, for the diameter range of pipes or other lines between 16 mm and 32 mm, there is no economical and easy-to-install solution for fire-protection-compliant sealing of the cable penetration in a wall or ceiling, which offers the same performance characteristics of up to EI120 (according to EN fire resistance classes for room integrity and heat barrier or thermal insulation under the influence of fire) as the currently comparable products for pipes with larger diameters, for example the CFS-B fire bandage with associated prescribed sealing agents.

[0008] The object of the present invention is to provide a method for sealing a pipe penetration in accordance with fire protection requirements, which represents a cost-effective and easy-to-install solution, particularly for pipes or other pipes with diameters between 16 mm and 32 mm, and in particular offers the same performance characteristics of up to EI120 (see above) as comparable conventional products for pipes with larger diameters, for example, the CFS-B fire bandage (see above) with the associated prescribed sealing agents. It is also an object of the invention to provide a corresponding prefabricated sealing assembly and a method for its production. Disclosure of the invention

[0009] This object is achieved by a method for producing a sealing assembly for fire-protection-compliant sealing of an opening according to claim 1. Further embodiments are specified in the dependent claims. All further features and effects mentioned in the claims and the description for the respective method, in particular features and effects of the suitable materials and the geometric arrangement of individual components of the partition, can also apply to the other method, the sealing assembly, and its production, and vice versa.

[0010] According to a first aspect, a method is provided for the fire-protection-compliant sealing of an opening (cable penetration) through which a cable is routed, in a wall or ceiling of a building or other room. First, a band-shaped fire protection bandage is provided which comprises fire-retardant and / or intumescent material and can, for example, be in the form of conventional, commercially available rolls. This can, for example, be the conventional fire protection bandage CFS-B mentioned above. The fire protection bandage is then cut to a length that corresponds to a simple circumference of the cable to be sealed, with or without a slight overlap.The slight overlap may, for example, be less than one-tenth of the pipe circumference and serve to ensure that the fire protection bandage can be laid around the pipe in a continuous, single layer without interruptions and / or that the ends of the fire protection bandage which meet in the circumferential direction can be connected to one another.

[0011] The cut-to-length fire protection bandage is then placed around the pipe, forming a single layer of fire protection bandage, possibly with a slight circumferential overlap. The fire protection bandage is applied to the pipe in such a way that a large portion of the fire protection bandage, in particular at least half of its width, lies within the opening in the wall / ceiling, and only the remaining width protrudes from the opening. The extent to which the fire protection bandage extends into or out of the opening can vary depending on the application, particularly the wall thickness and / or the pipe diameter.

[0012] A ring of putty is then applied to the part of the fire protection bandage protruding from the opening, forming or molding a putty ring (preferably roughly disc- or circular-shaped, although a regular shape is not important) with an outer diameter slightly larger than the opening diameter. The putty ring is shaped so that it closes the opening, i.e., the annular gap between the cable and the edge of the opening, on the outside, while extending slightly beyond the edge of the opening in the ceiling or wall. In other words, the putty ring thus formed covers the annular gap and is pressed against both the fire protection bandage and the edge of the opening, thereby sealing the cable penetration.

[0013] In this way, a fire-resistant seal can be constructed easily and cleanly, especially retrospectively and / or over a regular or irregular opening of any geometry.

[0014] A suitable putty is ideally plastically deformable, allowing it to be molded to the specific shape of the annular gap between the pipe and the opening edge for sealing. The putty can also be sealed and / or optionally adhesive. The latter is not a mandatory requirement, however, because the putty ring can be sufficiently securely attached to the pipe penetration simply by pressing it against the fire protection bandage surrounding the pipe on the one hand and against the wall or ceiling on the other, and, for example, additionally by partially pressing the putty into the annular gap in between.

[0015] The modeling clay can, for example, be a cross-linked rubber-based product. In particular, it can be a permanently plastic butyl rubber compound.

[0016] To improve its fire-protection properties, the modeling clay can also contain fire-protection additives. For example, the modeling clay can be flame-retardant or intumescent, so that it foams up when exposed to heat and can thus seal any gaps in the opening that may arise in the event of a fire, for example, due to a melting cable.

[0017] The process is characterized by very minimal processing and tooling requirements. It can essentially be carried out quickly and easily by hand. The resulting seal is immediately functional: No additional drying time or additional sealants are required. This can be significantly simplified compared to the conventional methods mentioned above.

[0018] The method is particularly well-designed and dimensioned for the fire-protection-compliant sealing of a cable penetration when the cable - such as a pipe or cable - has a diameter in the range of approximately 16 mm to approximately 32 mm. The necessary material requirements can be directly adapted to the pipe or cable diameter and the size of the opening in the wall or ceiling, which is very resource-efficient. The conventional fire protection bandage, typically available in rolls, can be directly adapted to the pipe or cable diameter and the size of the opening in the wall or ceiling by cutting it to length. As an example described in detail below shows, this can result in material savings of approximately 88% compared to a known installation solution using CFS-B, which is designed for a thicker cable and requires a double layer of fire protection bandage despite its much greater width.

[0019] According to a further aspect of the invention, a method is provided for producing a sealing assembly for the fire-protection-compliant sealing of an opening through which a cable is routed (cable penetration) in a wall or ceiling of a building or other room. The method comprises the following steps: First, a band-shaped fire protection bandage is provided which comprises fire-retardant and / or intumescent material and can, for example, be in the form of conventional, commercially available rolls. This can, for example, be the conventional fire protection bandage CFS-B mentioned at the outset. The fire protection bandage is then cut to a length that corresponds to a simple circumference of the cable to be sealed, with or without a slight overlap.The slight overlap may, for example, be less than one-tenth of the pipe circumference and serve to ensure that the fire protection bandage can be laid around the pipe in a continuous, single layer without interruptions and / or that the ends of the fire protection bandage which meet in the circumferential direction can be connected to one another.

[0020] Next, a strip of putty is applied along one of the two edges of the cut-to-length fire protection bandage, which are intended to extend circumferentially around the pipe. To do this, the putty is pressed or otherwise secured in the form of a thick strip to the edge of an outer surface of the fire protection bandage not intended for application to the pipe. The putty strip should be of sufficient thickness and width to cover and seal an annular gap between the pipe and an opening edge of the pipe penetration to be sealed.

[0021] The fire protection bandage, provided with the clay strip, can then optionally be rolled into a single layer, designed to fit around the pipe to be sealed and featuring an inner diameter almost identical to, but only slightly larger than, the circumference of the pipe. The circumferentially overlapping ends of the fire protection bandage can be temporarily secured together, for example, using part of the clay strip or additional clay.

[0022] Alternatively or additionally, a removable transport protection film can optionally be applied to at least one surface of the putty strip in order to protect the putty strip from mechanical damage or from unintentional adhesion to surfaces not intended for this purpose during transport of the sealing assembly and / or when attaching the sealing assembly to the cable duct to be sealed.

[0023] The resulting sealing assembly is prefabricated for the subsequent method for sealing a cable penetration in accordance with fire protection requirements: According to a further aspect of the invention, a method for sealing a cable penetration in accordance with fire protection requirements using a prefabricated sealing assembly of the type described herein is provided. The method comprises the following steps: The sealing assembly prefabricated as described is placed around the cable so that a layer of the fire protection bandage is formed on the cable, optionally with an overlap, wherein the peripheral edge of the fire protection bandage provided with the molding compound strip protrudes outward from the opening. Before or after this step, any transport protection film present is removed from the molding compound strip.

[0024] The clay strip is then kneaded into a clay ring (especially approximately disc-shaped or circular, although a regular shape is not important) with an outer diameter slightly larger than the opening diameter, so that the clay ring closes the opening and extends slightly beyond its edge. During this and / or subsequent process, the clay ring is pressed against the fire protection bandage and the edge of the opening, thereby sealing the cable penetration. Furthermore, everything described above for the method according to the first aspect applies accordingly to this method.

[0025] In particular, the sealing of the cable duct with such a prefabricated sealing assembly can be carried out in a single assembly step, because in contrast to the method according to the first aspect of the invention described above, the fire protection bandage is already cut to length according to the cable circumference and provided with the modeling compound.

[0026] In all aspects, a core of the invention is a simple sealing of thin pipes and other lines by means of a prefabricated or sequentially arranged combination of a fire protection bandage (also referred to as a fire protection mat) with a suitable modeling compound.

[0027] In particular, the fire protection bandage can comprise a flexible carrier layer, for example a fabric layer, to which a, in particular continuous, fire protection tape made of an intumescent material is attached. In particular, such a fire protection bandage can be applied to the pipe with its fire protection tape, and the putty can be applied and pressed onto the carrier layer facing away from the pipe.

[0028] In particular, the fire protection bandage can be cut to a reduced width of approximately 30 mm before or after cutting to length.

[0029] In particular, the fire protection bandage can protrude approximately 5 cm out of the opening after being wrapped around the cable.

[0030] According to a further aspect of the invention, a prefabricated sealing assembly is provided for the fire-protection-compliant sealing of an opening through which a cable is routed (cable penetration) in a wall or ceiling of a building or other space. As described, among other things, above and below, this sealing assembly of the type set forth herein comprises a band-shaped fire protection bandage with a length corresponding to a simple circumference of the cable, with or without a slight overlap, wherein the fire protection bandage comprises fire-retardant and / or intumescent material. The sealing assembly further comprises a strip of putty extending along one of the two circumferential edges of the fire protection bandage and attached to an outer surface of the fire protection bandage not predetermined for application to the cable.

[0031] In an advantageous variant of the sealing assembly according to the invention, the sealing assembly is designed as a particularly prefabricated roll product which is designed for use in particular for several pipes.

[0032] Optionally, the sealing assembly can further comprise a removable film on at least one surface of the clay strip, which is in particular designed as a release film or protective film. This is particularly advantageous for a sealing assembly designed as a roll product, in order to prevent contact of the clay with the bandage to the desired extent when more than one roll is wound.

[0033] Alternatively or additionally, the cut-to-length fire protection bandage provided with the modeling clay strip can optionally be rolled up into a single layer with an overlap, whereby overlapping ends of the fire protection bandage can be fastened to one another, for example by part of the modeling clay strip or additional modeling clay. Short description of the drawings

[0034] The above aspects of the invention and their embodiments and specific configurations are explained in more detail below with reference to the examples shown in the accompanying drawings. The drawings are schematic. They may, but do not have to, be to scale. Like reference numerals represent like or functionally equivalent elements. They show: Figures 1a-c show individual steps of a method according to the first aspect of the invention for sealing off an opening in a wall through which a thin pipe is passed; Figure 2 shows an example of a sealing assembly of the type set out herein for use in a method according to a further aspect of the invention; and Figure 3 shows a further example of a sealing assembly of the type set out herein. Description of embodiments

[0035] All the various embodiments, variants and specific design features of the method according to the first and further aspects of the invention and the corresponding sealing assembly mentioned above in the description and in the following claims can be implemented in the Figures 1a to 3shown examples. They will therefore not be repeated here. The same applies to the definitions and effects already given above with regard to individual features that are Fig. 1a-3 are shown.

[0036] Figures 1a to 1c show in a perspective view individual steps of a method according to the first aspect of the invention for sealing off an opening 1 in a drywall 2 through which a thin pipe 3 (line) is guided.

[0037] First (not shown) a band-shaped fire protection bandage 4, which in this example is a conventional fire protection bandage CFS-B, is reduced (cut) from about 125 mm to about 30 mm in width and cut to a length corresponding to the circumference of the pipe 3.

[0038] How Fig. 1ashows, the cut-to-length fire protection bandage 4 is then placed around the pipe 3, so that a single layer of the fire protection bandage 4 is formed on the pipe 3. The fire protection bandage 4 is applied to the pipe 3 in such a way that a large part of the fire protection bandage 4, in particular at least half of its width, is hidden within the opening 1 in the wall 2, and only its remaining width - in this example approximately 5 mm - protrudes from the opening 1.

[0039] How Fig. 1b and Fig. 1cshow, a ring-shaped modeling clay 5 is then applied by hand to the part of the fire protection bandage 4 protruding from the opening 1 in such a way that a modeling clay ring 6 (in this example approximately disc-shaped or circular, although a regular shape is not important) with an outer diameter slightly larger than the opening diameter is formed or shaped by kneading. The modeling clay ring 6 is shaped in such a way that it closes the opening 1, i.e. the annular gap 7 between the pipe 3 and the opening edge 8, on the outside and extends slightly beyond the opening edge 8 in the wall 2. In other words, the modeling clay ring 6 thus formed covers the annular gap 7 and is pressed firmly against both the fire protection bandage 4 and the opening edge 8. The fire protection bandage 4 is thus fixed and the annular gap 7 is closed, i.e. sealed.

[0040] A suitable putty 5 is ideally plastically deformable so that it can be adapted to the respective individual shape of the annular gap 7 by kneading. The putty can also be dense and / or optionally also adhesive. It can, in particular, be a permanently plastic butyl rubber mixture.

[0041] To improve the fire protection properties, the modeling clay 5 can also contain fire protection additives. For example, the modeling clay can be flame-retardant or intumescent, so that it foams when exposed to heat and can thus seal any defects in the opening 1 that may arise in the event of a fire, for example, due to a melting cable.

[0042] Fig. 2shows an example of a prefabricated sealing assembly 9 of the type set forth herein for use in a method according to a further aspect of the invention. To produce the sealing assembly 9, a conventional fire protection bandage 4 (type CFS-B) was reduced (cut) from approximately 125 mm to approximately 30 mm in width and cut to a length corresponding to the circumference of the line to be sealed (not shown) plus a slight overlap 10. Furthermore, the sealing assembly 9 comprises a plasticine strip 11 extending along one of the two circumferential edges 12 of the fire protection bandage 4 and attached to an outer surface 13 of the fire protection bandage 4 not intended for application to the line. In this example, this outer surface 13 is a fabric layer 13 to which a continuous fire protection bandage 14 made of an intumescent material intended to be applied to the line is attached on the inside.The modeling clay strip 11 is made of the same modeling clay 5 as in . Fig. 1a-1c formed.

[0043] At the Fig. 2 In the prefabricated sealing assembly 9 shown, the cut-to-length fire protection bandage 4 provided with the plasticine strip 11 is rolled up into a single layer with an overlap 10, wherein overlapping ends of the fire protection bandage 4 are fastened to one another by additional plasticine 15.

[0044] Fig. 3 shows another example of a prefabricated sealing assembly 9a, which additionally has a removable transport protection film 16 on the outside of the plasticine strip 11. Furthermore, the Fig. 2 Executed also in relation to Fig. 3 apply mutatis mutandis. Fig. 3 In the variant shown, the prefabricated sealing assembly 9a is not rolled up, although this can optionally be done here in a further manufacturing step.

[0045] With a pre-assembled sealing assembly 9 or 9a of the Figures 2 or 3 can be used to seal off a cable penetration, for example on pipe 3 of the Fig. 1a , in a single assembly step (OneStep) with a result as in Fig. 1c be performed.

[0046] As representative fire tests with a 100mm thick drywall and hand-made prototypes, as they are in Figures 1a to 3 The test target of up to EI 120 (according to EN fire resistance classes for integrity and heat barrier or thermal insulation under the influence of fire) is achieved for various pipe types with different diameters between 16 mm and 32 mm, such as for a PP-R Aquatherm pipe with a 20 mm diameter and a 3.5 mm wall thickness; a PVC pipe with a 32 mm diameter and a 3.6 mm wall thickness; a PVC pipe with a 25 mm diameter and a 1.9 mm wall thickness; electrical conduits, flexible, FFKu-EL-F with a 25 mm diameter, unused; a PE pipe with a 25 mm diameter and a 1.8 mm wall thickness.

[0047] The reduced amount of intumescent material used according to the invention is therefore sufficient for these pipe types. In solid walls and ceilings, the function of the bandage should therefore be at least comparable. As the following calculation shows, a material saving of approximately 88% can be achieved compared to the analogous conventional installation solution with CFS-B, which is particularly resource-efficient (V CFS Calla refers to the volume of the fire protection bandage 4 cut to size according to the invention): Example calculation for the material consumption of the fire protection bandage 4 according to the present invention: πD = U , U = 78 , 5 mm für D = 25 mm bei 1 . Umwicklung

[0048] Fire protection material: Bandage of 2mm thickness and 30mm width (measured in pipe longitudinal direction) → VCFS − Calla = U · 2 mm · 30 mm = 4710 mm 3

[0049] With a conventional fire protection bandage CFS-B, the following material consumption results in comparison: 2 wraps required, thickness 2mm and width 125mm (measured in the pipe's longitudinal direction) → VCFS − B = U · 2 Umwicklungen · 2 mm · 125 mm = 39250 mm 3 → Einsparung 1 − VCFS − Calla / VCFS − B = 1 − 0 , 12 = 0 , 88

[0050] In addition to the applications of the inventive method and the inventive sealing assembly described herein as examples, other applications for other installations, such as aluminum composite pipes, insulated solar lines, and air conditioning split applications, are also possible examples. Furthermore, application in existing combined sealing systems is also possible. Instead of the described putty, alternative building materials can also be used for sealing, provided they can ensure the required fire-resistant seal.

Claims

1. Method for producing a seal assembly (9, 9a) for sealing, in accordance with fire protection requirements, an opening (1) in a wall (2) or ceiling through which a line is fed, characterized by the steps of: - cutting a strip-shaped fire protection bandage to a length which corresponds to a single circumference of the line, with or without overlap (10), the fire protection bandage comprising fire-retardant and / or intumescent material; - applying a kneadable-compound strip (11) along one of the two edges (12) of the cut-to-length fire protection bandage (4) that are intended to extend in the circumferential direction of the line, the kneadable-compound strip (11) being pressed or otherwise fastened to said edge (12) on an outer surface of the fire protection bandage (4) that is not intended to be applied to the line (13); and - preferably applying a removable transport protection film (16) to at least one surface of the kneadable-compound strip (11) and / or preferably rolling up the fire protection bandage (4) provided with the kneadable-compound strip (11) to form a single layer with overlap (10), overlapping ends of the fire protection bandage (4) being temporarily fastened to one another, in particular by a portion of the kneadable-compound strip (11) or by additional kneadable compound (15).

2. Method according to claim 1, characterized by the steps of: - wrapping the seal assembly (9, 9a) around the line, such that a layer of the fire protection bandage (4) is formed on the line, optionally with overlap (10), the circumferential edge (12) of the fire protection bandage (4) that is provided with the kneadable-compound strip (11) protruding outward from the opening (1); - optionally removing the transport protection film (16); and - shaping the kneadable-compound strip (11) to form a kneadable-compound ring (6) of a slightly larger outer diameter than the opening diameter, such that the kneadable-compound ring (6) closes the opening and extends slightly beyond the edge (8) of the opening, and pressing the kneadable-compound ring (6) formed in this way firmly on the fire protection bandage (4) and on the opening edge (8) in order to seal the line feedthrough.

3. Method according to either of the preceding claims, characterized in that the line has a diameter in a range of between approximately 16 mm and approximately 32 mm.

4. Method according to any of the preceding claims, characterized in that the kneadable compound (5) is - elastically and / or plastically deformable; and / or - dense and / or - adhesive and / or - designed as a crosslinked rubber-based rubber product and / or - formed with fire protection additives.

5. Method according to any of the preceding claims, characterized in that the fire protection bandage comprises a flexible carrier layer, in particular a woven fabric layer (13), to which an, in particular continuous, fire protection wrap (14) made of an intumescent material is fastened.

6. Method according to any of the preceding claims, characterized in that the fire protection bandage (4), together with its fire protection wrap (14), is applied to the line, and the kneadable compound (5) is applied and pressed on the carrier layer.

7. Method according to any of the preceding claims, characterized in that the fire protection bandage (4) is cut to a reduced width of approximately 30 mm before or after being cut to length.

8. Method according to any of the preceding claims, characterized in that the fire protection bandage (4) protrudes approximately 5 mm outward from the opening (1) after being wrapped around the line.