Multi-chamber hollow profile and fire protection structure containing this multi-chamber hollow profile

Description

Field of the invention

[0001] The invention relates to a multi-chamber hollow profile according to the preamble of claim 1, a fire protection structure, in particular a frame for fire protection glazing, into which this multi-chamber hollow profile is inserted, a method for producing the multi-chamber hollow profile, and a use of the multi-chamber hollow profile. Technical background

[0002] It is known to manufacture fire-resistant frames, such as glazing frames, from a load-bearing frame profile and a separate hollow profile, which is inserted as a separate component into a cavity of the load-bearing frame profile suitable for receiving the hollow profile. The load-bearing frame profile and the hollow profile each have cavities that typically extend in the longitudinal direction of the frame profile. These cavities can have different functions. For example, they can be filled with a fire protection material. The fire protection material is usually inserted into at least one cavity as a pre-formed component, such as a dimensionally stable insert or slot. Other existing cavities can, for example, be used as cable ducts or to accommodate fittings or the like. Load-bearing fire-resistant frames for fire protection elements, such asThe following description refers to frames for fire-resistant glazing whenever reference is made to frames, fire-resistant frames, glazing frames, frame profiles, or frame profile parts. The invention also generally relates to multi-chamber hollow profiles for insertion into fire-resistant structures, such as fire-resistant windows, doors, or walls.

[0003] A standard structural frame profile design comprises two frame profile sections and bolts that firmly connect the two frame profile sections in the finished frame. If a hollow profile filled with a fire-resistant material is to be inserted into such a design consisting of two frame profile sections and connecting bolts, through holes are usually created in the hollow profile filled with fire-resistant material for the bolts to pass through.

[0004] EP 1 681 430 A2 discloses a composite profile, for example for a window frame, comprising two metal profile parts mounted at a fixed distance from one another and connected by bolts arranged perpendicular to the metal profile parts. A fire-resistant and / or heat-resistant insulation material made of alum or glass wool is arranged between the metal profile parts. The insulation material is protected from environmental influences by an enclosing jacket and lateral covers. An additional external cavity is formed between the jacket and cover, which can serve, for example, as a cable duct or cavity for additional fire protection material. The bolts extend through the insulation material and require drilling into the jacket.

[0005] EP 2 749 724 A1 discloses a composite profile for fire doors and fire windows. The supporting frame profile comprises a central profile made of fiber-reinforced plastic, with metallic support profiles attached to opposite sides. Within the fiber-reinforced plastic profile, inner longitudinal chambers are provided into which fittings and / or corner connecting brackets and / or calcium silicate inserts can be inserted.

[0006] DE 10144551 A1 discloses a fire protection element for constructing a framework on a building for supporting a clampable component, such as fire-resistant glazing. A core profile serving as an anchor is surrounded by a thermally insulating filler compound, which is enclosed by a cladding. The hollow chamber contained in the core profile in some embodiments does not extend to the outer surfaces of the cladding in the form of a load-bearing box profile enclosing the fire protection material, but is always surrounded on all sides by the filler compound. The hollow chamber is not intended to accommodate any object.

[0007] WO 2003 / 023175 A1 discloses a frame profile with a fire protection material filling. A hollow chamber for receiving a locking bar of a locking mechanism or the like can be provided in the fire protection material filling ( Fig. 3). The fire protection material is filled directly into the frame and therefore does not represent an insert or a separate filling profile with its own casing profile and fire protection material filling.

[0008] The composite profile according to EP 1 681 430 A2 has several disadvantages. Drill holes must be provided in the casing for the bolts to pass through. In one embodiment, recesses are created directly in the insulation material, into which the cover is attached, so that the insulation material, which acts as a fire protection material, is not hermetically sealed in several places. Insulation material that has become brittle over time can leak out through the holes and recesses. Moving parts in the holes can cause mechanical abrasion of the unprotected insulation material. In the event of a fire, cooling water bound in a coolant in the insulation material can escape prematurely through the holes or recesses. This is detrimental to the cooling performance of the insulation material.Finally, the hollow chamber formed between the sheath and the cover for accommodating cables in the composite profile according to EP 1 681 430 A2 lies completely outside the insulation material, so that the cables are only inadequately protected from fire in the event of a fire.

[0009] In the composite profile according to EP 2 749 724 A1, the longitudinal chambers are provided in the load-bearing central frame profile. The fixed connection between the longitudinal chambers and the load-bearing profile has, among other disadvantages, that the type, size, and arrangement of the chambers for the finished fire protection frame are completely fixed. This system therefore lacks the desired flexibility.

[0010] US1792491A discloses in Figure 11 a multi-chamber hollow profile with an outer wall. Summary of the invention

[0011] The invention is based on the object of specifying a multi-chamber hollow profile in which fire protection material is better protected when cavities are provided in the fire protection material for accommodating mechanical connecting devices, fittings, cables, or the like. A further object of the present invention is to better protect at least one hollow chamber of the multi-chamber hollow profile, which serves as a shaft for heat-sensitive components such as optical or electrical cables, electronic components such as sensors, rods, screws, connecting bolts, fittings, reinforcement inserts (e.g., burglar-resistant polycarbonate inserts), or the like, from the heat of a fire by means of at least one fire protection material chamber.Finally, the invention is based on the object of specifying a multi-chamber hollow profile in which at least one hollow chamber for receiving cables, sensors, connecting bolts, fittings, reinforcement inserts or the like (hereinafter: "receiving hollow chamber") and at least one hollow chamber filled with fire protection material (hereinafter: "fire protection material chamber") can be combined with each other as flexibly and as required.

[0012] The subject matter of the invention is therefore a multi-chamber hollow profile with the features of claim 1.

[0013] The wall of the receiving hollow chamber is intended, in particular, to prevent the penetration of particles of the fire protection material from a fire protection material chamber into the receiving hollow chamber, and in a preferred embodiment, also the penetration of liquids such as water, particularly in the form of water vapor, from the fire protection material. The primary function of the wall of the receiving hollow chamber is therefore to permanently, at least largely, prevent the penetration of fire protection material from a fire protection material chamber into the receiving hollow chamber during the manufacture of the multi-chamber hollow profile, during its handling, and after its intended installation in a fire protection structure under normal conditions, so that - apart from a fire - only insignificant amounts of the fire protection material can enter the receiving cavity.

[0014] The following materials are particularly suitable for the wall of the receiving hollow chamber: plastics (both thermosets and thermoplastics), preferably from the material groups of polyamides, polyimides, polyetherimides, polybenzimidazoles, polyaryletherketones, polyetheretherketones (PEEK), silicones, fluoropolymers, silicone resins, acrylonitrile-butadiene-styrenes (ABS), styrene-acrylonitriles (SAN), acrylic ester-styrene-acrylonitriles (ASA), PTFE, synthetic resins, phenolic plastics, polycarbonates, polyacrylates, rubbers, in particular ethylene-propylene-diene rubber, polylactates, PMMA, PET, PVC, TPU, polyethylene, polypropylene, polystyrenes; also fiber-reinforced plastics, in particular glass fiber and / or carbon-reinforced plastics (GRP, CFRP), preferably based on epoxy resins, melamine resins, acrylate resins, polyester resins; metals; organic substances such as cellulose-based materials such as cardboard or wood; textiles, woven fabrics, knitted fabrics, nonwovens made of fiber materials.

[0015] The multi-chamber hollow profile according to the invention comprises several hollow chambers.

[0016] A plurality of these hollow chambers are filled with fire protection material, thereby forming a plurality of fire protection material chambers. Fire protection material chambers can be partially filled with fire protection material, for example, only on the inside of their chamber walls or by inserting an undersized insert, or they can be substantially completely filled with fire protection material. Furthermore, the multi-chamber hollow profile according to the invention comprises at least one receiving hollow chamber intended for accommodating components such as optical or electrical cables, electronic components such as sensors, rods, screws, bolts, reinforcement inserts, or the like. Finally, the multi-chamber hollow profile can optionally have at least one further hollow chamber that is neither filled with fire protection material nor intended for accommodating components such as sensors, fittings, cables, bolts, reinforcement inserts, or the like (hereinafter "empty chambers").

[0017] The receiving hollow chambers, fire protection material chambers, or empty chambers can, for example, have an elongated or flat shape. Typically, the chambers for glazing frames are elongated chambers with significantly larger dimensions in the longitudinal direction than in the transverse direction. If the chambers of the typical design of glazing frames are elongated, they have one or more longitudinal walls and one or more end walls at their ends. In this case, the longitudinal walls run parallel to the longitudinal axis of the chambers and the glazing frame, and the end walls are arranged transversely or obliquely to this longitudinal axis. If the multi-chamber hollow profile is to be incorporated into flat fire protection structures such as fire doors or walls, the multi-chamber hollow profile is also usually flat with a relatively small thickness compared to the external dimensions (length / width).In this case, one or more of the chambers may also have a flat extension.

[0018] In this embodiment, the walls of the receiving hollow chamber(s) run essentially parallel to the longitudinal walls of the fire protection material chamber(s).

[0019] If, however, receiving hollow chambers are provided, for example, for receiving bolts for connecting the separate profile parts of a glazing frame, the walls of the receiving hollow chambers are arranged substantially perpendicular to the longitudinal axis of the multi-chamber hollow profile and thus substantially perpendicular to the longitudinal walls of the fire protection material chamber(s). In other words, the main axis of the receiving hollow chamber(s) in this case runs perpendicular to the main axis of the fire protection material chamber(s). At the same time, the end faces of the receiving hollow chamber(s) are rotated by 90 degrees relative to the end faces or end walls of the fire protection material chamber(s), and at least one of them, preferably both end faces, is arranged in the region of the outer wall of the multi-chamber hollow profile running along the profile.

[0020] The invention is applicable to both orientations of receiving hollow chambers, namely essentially parallel or perpendicular to the fire protection material chambers, as well as intermediate forms thereto.

[0021] The at least one receiving hollow chamber preferably penetrates the multi-chamber hollow profile from a region of its outer wall or an end face to an opposite region of its outer wall or an end face, so that a component can be pushed or pulled through the receiving hollow chamber of the multi-chamber hollow profile or into it from two sides. However, it is within the scope of the invention if a receiving hollow chamber is designed in the manner of a blind hole and is only accessible from an outer wall or end face of the multi-chamber hollow profile. This can be useful if small, heat-sensitive components with little space requirement are to be accommodated in the receiving hollow chamber or if bolts or other mechanical fixing means are only intended to penetrate into the multi-chamber hollow profile for fixing purposes and not to penetrate it completely.

[0022] In one embodiment, the fire protection material chambers are closed at their ends located near the outer wall or one end of the multi-chamber hollow profile, for example, with openable and closable lids. This is advantageous for maximizing the cooling effect in the event of a fire. However, they can also be open at their ends.

[0023] In one embodiment, one or more seals or other indentations or cross-sectional constrictions that reduce the flow cross-section are present in a receiving hollow chamber. Alternatively or additionally, the inner surface of the wall of a receiving hollow chamber can be provided with a three-dimensional structure such as grooves, ribs, or graining, generally speaking, with a relief-like structure or a structure with macroscopic irregularities. This is particularly advantageous when receiving hollow chambers are installed vertically, since it allows the flow of hot gases through the receiving hollow chambers (chimney effect) to be optimized, in particular throttled.

[0024] It is within the scope of the invention to leave fire protection material chambers open on at least one of their front sides. However, fire protection material chambers are preferably completely enclosed by a wall. The main advantage of completely enclosing the fire protection material in the fire protection material chambers, including their front sides, is that there is then no exchange of substances between the interior of these chambers and their surroundings.

[0025] For the walls of fire protection material chambers located inside the multi-chamber hollow profile, a variety of materials are generally suitable, which ensure a separation of the fire protection material in one fire protection material chamber from other hollow chambers of the multi-chamber hollow profile, including in particular the materials listed above, which are suitable for the wall of the at least one receiving hollow chamber.

[0026] The outer wall of the multi-chamber hollow profile serves to mechanically protect and stabilize the plurality of fire protection material chambers and the at least one receiving hollow chamber, and to protect them against harmful external influences, preferably for as long as possible after the start of a fire. The outer wall can be part of the wall of at least one fire protection material chamber; it can also form a small part of the wall of at least one receiving hollow chamber. In this respect, the requirements formulated for the respective walls apply as minimum requirements even where these hollow chamber walls are part of the outer wall of the multi-chamber hollow profile.Irrespective of this, the outer wall of the multi-chamber hollow profile is preferably essentially impermeable to fire protection material, particularly in its cured state, as well as to its components, through a suitable choice of material and thickness, and preferably remains so up to an outer wall temperature of at least 70°C, in particular up to at least 100°C. This ensures that the fire protection material encased by the outer wall only unfolds its function, such as the release and evaporation of cooling water, at the high temperatures of a fire and not at temperatures elevated for other reasons, for example, during strong solar radiation. The full cooling capacity of the fire protection material is thus only achieved, as desired, during a fire. By enclosing the interior of the multi-chamber hollow profile with an outer wall material that is impermeable to the encased fire protection material, e.g.Made of organic polymers, especially plastics (especially GRP or CFRP), cardboard, or metals, mechanical abrasion of the fire protection material and thus contamination of other components is also prevented. Conversely, no harmful foreign substances can penetrate the multi-chamber hollow profile from the outside, and in particular its fire protection material chamber(s). To ensure at least largely complete insulation of the interior of the fire protection chamber(s), their encasement by the outer wall must be essentially complete. The outer wall, which is impermeable to fire protection material, should therefore also be free of large pores.

[0027] For the walls of receiving hollow chambers, however, less heat-stable materials can be used, which can also be permeable to components of the fire protection material or the foamed fire protection material. If a porous, mesh-like or net-like material is used for the wall of a receiving hollow chamber, components of the fire protection material, in particular water vapor, can penetrate the wall in the event of a fire. However, with sufficiently small pores, a small mesh size and / or small mesh spacing, at least mechanical protection can be guaranteed, since particles of the cured fire protection material can neither escape from a fire protection material chamber surrounding the receiving hollow chamber nor can solid objects penetrate it. This is of particular advantage for receiving hollow chambers running perpendicular to fire protection material chambers, which are intended, for example, to accommodate bolts.

[0028] In the event of a fire, this embodiment allows gaseous decomposition products arising in the fire protection material to escape through the porous wall of a receiving hollow chamber and from there into the environment in a controlled manner. At the same time, coolants, preferably water vapor, from the fire protection material of at least one fire protection material chamber surrounding the receiving hollow chamber can cool, for example, metallic connecting bolts of the fire protection frame located in the receiving cavity into which the multi-chamber hollow profile is inserted, thereby improving the fire resistance of the frame.

[0029] Another significant advantage of the multi-chamber hollow profile according to the invention is that the receiving hollow chambers used as cable ducts are completely or predominantly enclosed by fire-resistant material in the area of ​​their walls. This provides particularly good protection for the cables from the heat of a fire.

[0030] Cables or other components inserted into the receiving hollow chamber can be encased, foamed, or fixed with additional material, particularly fire protection material. The material used advantageously has cooling and / or insulating properties.

[0031] A further advantage of the multi-chamber hollow profile, particularly in the case of longitudinally arranged receiving hollow chambers, is its modular design. The hollow chambers to be used as receiving hollow chambers and fire protection material chambers can be selected for specific applications, thus providing different variants of the multi-chamber hollow profile as needed. All hollow chambers can first be combined with empty cavities to form a multi-chamber hollow profile. A portion of these cavities is then filled with fire protection material, transforming the filled hollow chambers into fire protection material chambers, while the remaining unfilled hollow chambers serve as receiving hollow chambers or empty chambers. Fire protection material chambers can also be manufactured in advance and then combined with at least one receiving hollow chamber.Simple structural shapes, such as cylinders or cuboid profiles, can be assembled particularly flexibly and adapted to various fire protection structures, such as frames. Furthermore, it is advantageous to produce a one-piece hollow chamber system (with hollow chambers oriented longitudinally, but especially with transversely oriented receiving hollow chambers for the passage of bolts) using polymer processing methods. Then, in the one-piece multi-chamber hollow profile, individual hollow chambers can be filled with fire protection material and one of the hollow chambers can be used as a receiving hollow chamber.

[0032] This modular design makes it possible to specifically adjust different fire protection classes by varying the proportion of fire protection material and the arrangement of fire protection material.

[0033] According to a preferred embodiment of the invention, receiving hollow chambers can remain open on one or both sides at their end faces to accommodate components such as cables, or can be opened and then, if necessary, closed with adapted lids.

[0034] Fire protection material chambers are open at their ends for filling or can be opened and are then either closed with lids when filled / after the fire protection material has cured in situ, or remain permanently open. In the case of receiving hollow chambers arranged transversely to the main axis or surface plane of the multi-chamber hollow profile, lids are not always required, especially if the receiving hollow chambers are used for inserting or passing through bolts.

[0035] In an arrangement according to the invention, the walls of the receiving hollow chamber(s) and the fire protection material chamber(s) extend parallel to the main axis of the multi-chamber hollow profile, and the end faces of the receiving hollow chamber(s) run essentially parallel to the end faces of the fire protection material chamber(s). This configuration corresponds to the essential basic arrangement according to the invention, in which the at least one receiving hollow chamber and the fire protection material chambers run parallel to the main axis of the multi-chamber hollow profile and to the main axis of the fire protection frame into which the hollow profile is inserted. The at least one receiving hollow chamber is preferably open at both of its end faces, so that cables can be pulled through, which are protected by surrounding fire protection material within the receiving hollow chamber with the interposition of its wall.

[0036] In the preferred embodiment of the invention, in which the receiving hollow chamber(s) and fire protection agent chamber(s) are arranged substantially parallel to one another and substantially parallel to the main axis of the multi-chamber hollow profile, the essential technical details of the invention can be particularly well recognized and described in the cross-sectional view. In the cross-sectional view perpendicular to the main axis of the multi-chamber hollow profile, the profile has an outer wall and one or more inner walls. The outer wall is located on the periphery of the multi-chamber hollow profile and delimits it from the environment, while inner walls are arranged inside the profile.Walls between adjacent fire protection material chambers and walls between adjacent receiving hollow chambers, as well as walls between fire protection material chambers and receiving hollow chambers, can either be formed by shared walls, particularly if the multi-chamber hollow profile was manufactured as a single piece by injection molding, or two or more walls can be adjacent to each other if the individual hollow chambers are manufactured separately and then joined to form a multi-chamber hollow profile. Preferably, the walls of receiving hollow chambers lie entirely within a multi-chamber hollow profile and do not form part of its outer wall.

[0037] To achieve the objectives of the invention, in particular improved protection of cables or other heat-sensitive components in the event of a fire, the hollow chamber(s) directly enclosed by the outer wall of the multi-chamber hollow profile are each partially or completely filled with fire protection material and thus serve as fire protection material chamber(s). As a result, the at least one internal receiving hollow chamber, for example for accommodating cables or other heat-sensitive components, can be particularly well protected in the event of a fire, since it is (are) completely surrounded in cross-section by the external fire protection material chamber(s).

[0038] If receiving hollow chambers for the passage of bolts are arranged at a 90-degree angle to the fire protection material chambers, a similar, almost complete enveloping of the receiving hollow chambers with fire protection material results. The walls of transversely arranged receiving hollow chambers and fire protection material chambers can be manufactured as a single piece. However, it is possible to insert and fix separately manufactured (elongated) hollow bodies (e.g. cylinders, rectangular profiles, or polyhedral profiles) into passage openings in the multi-chamber hollow profile or at least one fire protection material chamber, which then form the walls of the receiving hollow chambers in the finished multi-chamber hollow profile. In this respect, there is no fundamental difference in design and construction between the parallel and perpendicular arrangement of receiving hollow chambers relative to fire protection material chambers.

[0039] The contour of receiving hollow chambers and fire protection material chambers is essentially determined externally by the desired or required shape of the multi-chamber hollow profile, which is to be inserted or used as an insert in a fire protection structure, in particular in a fire protection frame (e.g. glazing frame). For this purpose, the outer wall of the multi-chamber hollow profile preferably has a polygonal, in particular triangular, quadrangular, in particular rectangular or square, pentagonal, hexagonal, or octagonal cross-section. Combinations of geometries are also possible. The walls of the receiving hollow chambers and fire protection material chambers, as well as any empty chambers, preferably also have a polygonal, in particular triangular, quadrangular, in particular rectangular or square, pentagonal, hexagonal, or octagonal cross-section. They can also have a circular or elliptical cross-section.Combinations of geometries are also possible for this.

[0040] The interaction of the contours of the receiving hollow chambers and fire protection material chambers with the contour of the outer wall of the multi-chamber hollow profile is exemplified by the schematic drawings in the Figures 1 to 12 illustrated.

[0041] In the cross-sectional view, fire protection material chambers and receiving hollow chambers, as well as any empty chambers, can completely fill the multi-chamber hollow profile. However, it is also possible for the various chambers to be joined together, rather than tightly packed and filling the space, leaving cavities between them. In these cases, the cavities remaining between the walls of adjacent chambers can either remain free and unused during installation or, if necessary, be used as cable ducts or similar.

[0042] It is within the scope of the invention if receiving hollow chambers are not completely, but only predominantly, surrounded by fire protection material chambers. According to the invention, at least a small part of the wall of a receiving hollow chamber can therefore form part of the outer wall of the multi-chamber hollow profile, as long as the predominant part of the wall of the receiving hollow chamber borders on fire protection material chambers or simultaneously forms their wall. This technical structure is exemplified in the Figures 6, 6a, 6b illustrates, in which a rectangular cross-section ( Fig. 6 ) or circular ( Fig. 6a, 6b ) The receiving hollow chamber is located on the outer edge of the multi-chamber hollow profile in the cross-sectional view, but on three of four sides ( Fig. 6 ) or over (almost) the entire circumference ( Fig. 6a, 6b ) is adjacent to at least one fire protection material chamber.

[0043] According to the invention, the outer wall of the multi-chamber hollow profile can have recesses, indentations or protrusions, claws, hooks, clips or similar fastening aids which facilitate the installation of the profile in a frame or, more generally, a fire protection structure or can serve to fasten frame parts or, more generally, parts of a fire protection structure to the multi-chamber hollow profile or vice versa.

[0044] The multi-chamber hollow profile according to the invention can be manufactured or assembled in a variety of ways. For many applications, it is advantageous to mold or manufacture the unfilled multi-chamber hollow profile in one piece from a single wall material. All known manufacturing techniques, particularly those from the field of polymer technology, can be used for this purpose. Examples include the extrusion process or injection molding. A modern technology available is the production of particularly complex components using 3D printers.

[0045] As previously explained, hollow chambers running transversely to the longitudinal extent of a multi-chamber hollow profile for accommodating cables or fastening elements such as bolts or screws can also be created before filling the fire protection material chamber(s) with fire protection material by inserting pipe sections with walls impermeable to the fire protection material (which can also be porous, net-like, or mesh-like) into suitable bores or openings in opposite areas of the outer wall and, if necessary, in inner walls within the multi-chamber hollow profile. These pipe sections are advantageously made of plastic or metal and can, if necessary, protrude beyond the outer walls of the multi-chamber hollow profile. This enables connection to other frame parts or general parts of a fire protection structure, e.g., by gluing, welding, and / or clipping.

[0046] This technique is particularly suitable for elongated or flat multi-chamber hollow profiles with receiving hollow chambers arranged transversely to the longitudinal or flat extension. For many other applications with simply shaped receiving hollow chambers and fire protection material chambers, these hollow chambers are manufactured individually and combined to create the desired multi-chamber hollow profile. In this case, it is possible to combine different materials. For example, the inner walls can be made of polymers, while the outer wall of the multi-chamber hollow profile is made of metal.

[0047] The fire protection material chambers of the multi-chamber hollow profile are fully or partially filled with a fire protection material. If the filling is only partial, this can be the inner lining of a hollow chamber with solid or liquid fire protection material. The fire protection material can be solid and dimensionally stable before being introduced into the multi-chamber hollow profile according to the invention. It is then inserted into a hollow chamber in the form of inserts or panels, for example in the shape of a cuboid, a polyhedron, or a cylindrical rod, which thereby becomes the fire protection material chamber.

[0048] Alternatively, dimensionally unstable fire protection materials or precursors thereof can be used. Their advantage is their greater flexibility of shape and thus their adaptability to complex cavities or narrow gaps. These include, for example, kneadable precursor materials for a fire protection material that harden to form the fire protection material in the fire protection material chambers, and powdered or liquid precursor materials for a fire protection material that, after filling, distribute particularly well in the fire protection material chambers and harden in situ to form the fire protection material.

[0049] The fire protection materials disclosed in DE 10 2012 220 176 A1, among others, can be used in the present invention, comprising at least two different water glasses and a further organic substance as a CO2 donor to improve the intumescent behavior. Likewise, the fire protection materials disclosed in US 2014 / 0145104 A1, comprising lightweight, insulating film materials and water-absorbing fillers, as well as fibers and / or thixotropic agents, can be used. Also usable are liquid fire protection materials based on water glass, as described in PL 402 681 A1. This list is not exhaustive. Rather, a variety of different fire protection materials can be used according to the invention, in particular those described in WO 2015 / 079265 A2 by the applicant.

[0050] In particular, materials with insulating or cooling fire protection properties can be filled into the fire protection material chambers. Additionally, they can also exhibit intumescent properties when using an appropriate fire protection material.

[0051] If intumescent fire protection materials are used, it is advantageous if the wall of the at least one receiving hollow chamber is permeable to water vapor or liquids, in particular porous, at least where it adjoins at least one fire protection material chamber, so that in the event of a fire, foamed fire protection material can reach the interior of the receiving hollow chamber and provide additional insulation there.

[0052] The multi-chamber hollow profile according to the invention has several fire protection material chambers. According to the invention, the several fire protection material chambers can be filled with different fire protection materials that differ from one another in their chemical composition or physical properties. Different chemical compositions can result in a fire protection material having a more cooling or more insulating effect. Physically, the fire protection materials can differ in their aggregate state, from fine-grained powder to gel-like to a single-piece three-dimensional solid, and in the grain size of the powder or the structure of the three-dimensional solid. A porous structure is also possible.The invention also relates to a method for producing a multi-chamber hollow profile, which consists in producing a multi-chamber profile according to the invention from a plurality of hollow chambers and filling fire protection material into at least two hollow chambers, in particular mixing precursor materials of a fire protection material from a multi-component system to obtain a liquid mixture and filling the liquid mixture into a plurality of hollow chambers and then allowing it to harden therein, after which the finished multi-chamber hollow profile has at least one receiving hollow chamber and at least one fire protection material chamber.

[0053] The invention is explained in more detail below with reference to embodiments shown in the figures. Fig. 1a is a schematic view of a multi-chamber hollow profile according to a first embodiment not according to the invention; Fig. 1b is a schematic view of a multi-chamber hollow profile according to a second embodiment not according to the invention; Fig. 2 is a schematic view of a multi-chamber hollow profile according to a third embodiment of the invention in a state before and after filling with fire protection material and before and after inserting a cable into the internal receiving hollow chamber; Fig. 3 is a schematic view of a multi-chamber hollow profile according to a fourth embodiment not according to the invention in a state before and after filling with fire protection material and before and after inserting a cable into the internal receiving hollow chamber;Fig. 4 is a schematic view of a multi-chamber hollow profile according to the invention according to a fifth embodiment of the invention, before and after filling with fire protection material and before and after inserting several cables into the internal receiving hollow chamber; Fig. 5 is a schematic representation of a method for producing a multi-chamber hollow profile according to the invention according to a sixth embodiment of the invention; Figs. 5a and 5b are schematic representations of a method for producing a multi-chamber hollow profile according to the invention according to two different variants of the sixth embodiment of the invention; Fig. 6 is a schematic representation of a multi-chamber hollow profile according to the invention according to a seventh embodiment of the invention; Figs. 6a and 6b are schematic representations of a multi-chamber hollow profile not according to the invention according to two different variants of the seventh embodiment of the invention;Fig. 7 is a schematic representation of multi-chamber hollow profiles according to the invention according to three further embodiments of the invention, each in a state before and after filling with fire protection material; Fig. 8 is a schematic representation of a method for producing a multi-chamber hollow profile according to the invention according to an eighth embodiment of the invention; Fig. 9 is a schematic representation of a method for producing a multi-chamber hollow profile according to the invention according to a ninth embodiment of the invention; Figs. 9a and 9b are schematic representations of the end result of a method for producing a multi-chamber hollow profile according to the invention according to two different variants of the ninth embodiment of the invention; Fig. 10 is a schematic representation of multi-chamber hollow profiles according to the invention according to further embodiments of the invention; Fig.Fig. 11 schematically illustrates a further manufacturing method of a multi-chamber hollow profile according to the invention; Fig. 12 illustrates a variant of the manufacturing method according to . Fig. 11 ; Fig. 13 schematically illustrates a window frame profile with an inserted multi-chamber hollow profile not according to the invention; Fig. 14 schematically illustrates a multi-chamber hollow profile with an angular (L-shaped) cross-section; and Fig. 15 shows a window frame profile comprising two connected hollow profiles with a multi-chamber hollow profile inserted into a receiving space between the hollow profiles. Examples of implementation

[0054] Only those in the Figures 2 , 4, 5, 5a, 5b , 6-9 , 9a , 9b , 10 and 11 The embodiments shown are part of the present invention. Figures 1a, 1b , 3 , 6a, 6b and 12-15 show embodiments that are not part of the invention.

[0055] Fig. 1a and 1 b show the two essential basic designs of the multi-chamber hollow profile 10 not according to the invention.

[0056] Fig. 1a shows an end face of a multi-chamber hollow profile 10 not according to the invention with a fire protection material chamber 12 of rectangular cross-section, completely filled with fire protection material 20, in the interior of which a receiving hollow chamber 14 is arranged, extending parallel to the fire protection material chamber 12 and completely enclosed by it in the longitudinal direction. The walls 10a, 14a of the two hollow chambers 12, 14 run parallel to one another. The outer wall 10a of the fire protection material chamber 12 simultaneously forms the outer wall 10a of the multi-chamber hollow profile 10. It extends parallel to the main axis of a glazing frame into which the multi-chamber hollow profile 10 is to be inserted (see Fig. 13). The inner wall 14a of the fire protection material chamber 12 simultaneously forms the wall 14a of the receiving hollow chamber 14. The end faces of both hollow chambers 12, 14 and thus of the multi-chamber hollow profile 10 lie in the same plane and perpendicular to the main axis. Cables, for example, can be routed through the internal receiving cavity 14 (see Fig. 2 - 4 ).

[0057] The following figures each show further exemplary embodiments of the invention. The description primarily refers to differences from the respective preceding exemplary embodiments, and the same reference numerals are used for identical or similarly acting features. Fire protection material 20 is represented by diamond hatching.

[0058] Fig. 1 Bshows an embodiment in which three hollow receiving chambers 14 with a circular cross-section are located entirely within a cuboid fire protection material chamber 12. In this embodiment, the main axis of the three hollow receiving chambers 14 is rotated by 90° relative to the main axis of the fire protection material chamber 12. The front end faces of the hollow receiving chambers 14 are located within the Fig. 1 B visible front area of ​​the wall 10a of the fire protection material chamber 12, which at the same time as in Fig. 1 a forms the outer wall 10a of the multi-chamber hollow profile 10. In the exemplary embodiment, the receiving hollow chambers 14 extend to the rear of the outer wall 10a of the multi-chamber hollow profile 10 (in Fig. 1 b not visible). This embodiment is suitable for receiving bolts in its receiving hollow chambers 14 for connecting two frame profile parts, between which the multi-chamber hollow profile 10 is inserted.

[0059] The walls 14a of the receiving hollow chambers 14, which are impermeable to fire protection material 20, prevent fire protection material 20 from penetrating from the fire protection material chamber 12 into the receiving hollow chambers 14.

[0060] In an alternative embodiment, the receiving hollow chambers 14 do not completely penetrate the multi-chamber hollow profile 10, but rather represent bores (blind holes) provided with walls 14a and of a limited depth. In this case, the receiving hollow chambers 14 can accommodate bolts and / or screws from the accessible front end face, which are only fastened to a frame profile part on one side, in order to fix the multi-chamber hollow profile 10 to the frame profile. Corresponding blind-hole-like receiving hollow chambers 14 can be present on the non-visible rear side of the multi-chamber hollow profile 10, so that in this way two frame parts can be connected to one another via the multi-chamber hollow profile 10, without there being a continuous heat-conducting connection between the two frame profile parts running through the multi-chamber hollow profile 10.

[0061] Not shown is an alternative embodiment in which at least one receiving hollow chamber is provided running parallel and at least one perpendicular to the main axis of the multi-chamber hollow profile.

[0062] Fig. 2shows a further embodiment of the multi-chamber hollow profile 0 according to the invention in cross-section perpendicular to its main axis. The multi-chamber hollow profile 10 comprises an outer wall 10a with a square profile and five hollow chambers. Four hollow chambers consist in cross-section of equal segments of a square. Together with their outer walls, they form the outer wall 10a of the multi-chamber hollow profile 10 and are separated from one another by four inner walls 18. When completely filled with fire protection material 20, they become four fire protection material chambers 12. Within the hollow profile with a square cross-section formed from the four fire protection material chambers 12 there is a receiving hollow chamber 14 with a circular wall 14a in cross-section, in which no fire protection material 20 is located.

[0063] All hollow chambers 12, 14 have walls 18, 14a impermeable to the fire protection material 20, e.g., made of glass fiber reinforced plastic (GRP), which is also the outer wall 10a. A flat cable 16 is routed through the centrally arranged receiving hollow chamber 14. In this way, the flat cable 16 is protected from the heat and from destruction for a certain period of time in the event of a fire. Instead of continuous inner walls 18, which divide the interior of the multi-chamber hollow profile 10 into four fire protection material chambers 12, the receiving hollow chamber 14 could also be supported by means of local support webs or the like on the inside of the outer wall 10a of the multi-chamber hollow profile 10 within a single fire protection material chamber 12.

[0064] The embodiment according to Fig. 3 represents a simplified modification of the embodiment according to Fig. 2The multi-chamber hollow profile 10 comprises an outer wall 10a in the form of a profile with a square cross-section and a receiving hollow chamber 14 in the form of an inner tube arranged concentrically therewith in its interior, wherein the inner tube forms a wall 14a of the receiving hollow chamber 14 that is impermeable to fire protection material 20. A liquid precursor material of a fire protection material 20, mixed from two components, is poured into the cavity between the inner tube and the outer wall 10a of the multi-chamber hollow profile 10. This precursor material hardens in situ and then imparts dimensional stability to the entire arrangement. In this arrangement, the outer wall 10a of the multi-chamber hollow profile 10 simultaneously forms the outer wall 10a of the fire protection material chamber 12, and the inner tube introduced as a separate component is simultaneously an inner wall 14a of the fire protection material chamber 12 and a wall 14a of the receiving hollow chamber 14 that is impermeable to fire protection material 20.

[0065] In the embodiment of the invention according to Fig. 4The multi-chamber hollow profile 10 consists of five hollow chambers. For insertion into a frame profile with parallel, spaced-apart profile inner sides, the outer wall 10a of the multi-chamber hollow profile 10 is rectangular in cross-section. A receiving hollow chamber 14, also rectangular in shape, is provided inside, which is supported by four inner walls 18 against the inner side of the outer wall 10a of the multi-chamber hollow profile 10 and is thus fixed in place. The inner walls 18 run continuously parallel to the outer wall 10a and to the receiving hollow chamber 14 and thus support the latter over their entire length against the inner side of the outer wall 10a of the multi-chamber hollow profile 10. At the same time, they divide the outer hollow chamber into four individual hollow chambers; however, they could also be interrupted and provide support for the receiving hollow chamber 14 on the inner side of the outer wall 10a only at certain points.The cavities between the receiving hollow chamber 14 and the outer wall 10a of the multi-chamber hollow profile 10 are filled with fire protection material 20 and thus form four fire protection material chambers 12. The receiving hollow chamber 14 has the same function as the receiving hollow chamber 14 according to the first embodiment (. Fig. 1 a ) and, in the illustrated embodiment, accommodates four flat cables 16, which are protected from external influences by the surrounding fire protection material chambers 12.

[0066] Fig. 5shows a method for producing a further embodiment of the invention, in which several partial aspects of the invention are realized simultaneously. The multi-chamber hollow profile 10 as a whole comprises an outer wall 10a, e.g. made of a metal, and an inner profile, e.g. made of a thermoplastic or thermosetting material, which has a grid-like cross-section consisting of several inner walls 18a. In a first step, the inner profile is inserted into the outer wall 10a, thereby forming a total of 9 hollow chambers, each separated from one another by inner walls 18 impermeable to fire protection material 20. Subsequently, six outer hollow chambers are filled with a first fire protection material 20a and two further hollow chambers are filled with a second fire protection material 20b. These 8 individually filled fire protection material chambers 12 form the outer region of the multi-chamber hollow profile 10, viewed in cross-section.The inner hollow chamber initially remains empty and represents the receiving hollow chamber 14 of the multi-chamber hollow profile 10.

[0067] Fig. 5a and 5b are schematic representations of a method for producing a multi-chamber hollow profile 10 according to the invention according to two different variants of the sixth embodiment of the invention. The outer wall 10a of the multi-chamber hollow profile 10, which is rectangular in cross-section, is provided on its inner side with grooves 24 for fixing an inner profile with a grid-like arrangement of inner walls 18a ( Fig. 5a ) or from individual interior walls 18b ( Fig. 5b). The inner walls 18b can be used or positioned as required, for example, to form a receiving hollow chamber 14 for a locking rod of a door frame profile. The inner walls 18b and the inner wall grille 18a can be made of a material with a lower melting point than the outer wall 10a, as long as the outer wall 10a enclosing the fire protection material chambers 12 is sufficiently heat-resistant. The outer wall 10a has Fig. 5A and 5B each have the same arrangement of grooves 24, which enables a flexible design of the multi-chamber hollow profile 10 with differently arranged inner walls 18a, 18b as required.

[0068] Fig. 6 shows a modification of the embodiment according to the invention Fig. 5Eight of the nine hollow chambers are filled with the same fire protection material 20 as fire protection material chambers 12 and, in cross-sectional view, essentially form the outer area of ​​the multi-chamber hollow profile 10. The remaining hollow chamber forms a receiving hollow chamber 14, which in this case is not completely surrounded by fire protection material chambers 12, but on one narrow side, no fire protection material chamber 12 is provided between the receiving hollow chamber 14 and the outer wall 10a of the multi-chamber hollow profile 10. This construction may be necessary if cables must be routed in a receiving hollow chamber 14 arranged close to the edge.Despite the direct adjoining of the outer wall 10a of the multi-chamber hollow profile 10, this embodiment also offers sufficient protection of the cables routed in the receiving hollow chamber 14 or other components installed therein from penetrating heat in the event of a fire due to the eight fire protection material chambers 12 that predominantly surround the receiving hollow chambers 14.

[0069] Fig. 6a and 6b are schematic representations of a multi-chamber hollow profile 10 according to two different variants of the seventh embodiment of the invention. In this embodiment, the receiving hollow chambers 14 have outer walls with a part-circular ( Fig. 6a ) or circular ( Fig. 6B ) cross-section and are accessible from an area of ​​the outer wall 10a of the multi-chamber hollow profile 10 ( Fig. 6a ) or arranged in the immediate vicinity of the outer wall 10a ( Fig. 6b ) to facilitate the creation of access.

[0070] Fig. 7 shows three embodiments according to the invention, in which multi-chamber hollow profiles 10 with essentially square outer contours (cross-section) are provided with circular or elliptical cross-section internal receiving hollow chambers 14. The receiving hollow chambers 14 are formed as in Fig. 2 , 4 each supported by means of continuous inner walls 18 (which may also be merely local support webs) on the inside of the outer wall 10a of the multi-chamber hollow profile 10 and are each completely surrounded by fire protection material chambers 12.

[0071] Fig. 8shows an embodiment according to the invention in which a multi-chamber hollow profile 10 consists of three cuboid hollow chambers with a flat cross-section and stacked one above the other, of which the two outer hollow chambers form fire protection material chambers 12, which enclose an inner hollow chamber as a receiving hollow chamber 14 between them. The multi-chamber hollow profile 10 is provided with four spacers or fixing pieces so that it can be inserted, together with the spacers or fixing pieces, into a correspondingly large box-shaped enveloping profile. The enveloping profile can be part of a fire protection frame into which the described multi-chamber hollow profile 10 is inserted as an insert (not shown).However, the enveloping profile can also form the outer wall 10a of a complex multi-chamber hollow profile 10', which is composed of the previously described multi-chamber hollow profile 10 as the inner profile and a box-shaped enveloping profile (outer wall 10a) and is intended as a whole for insertion into a fire protection frame. The spacers serve to securely position the inner multi-chamber hollow profile 10, which does not completely fill the enveloping profile (outer wall 10a). The inner multi-chamber hollow profile 10, including its spacers, can be made of a metal. The cuboid enveloping profile forming the outer wall 10a of the complex multi-chamber hollow profile 10' can be made of a glass fiber reinforced plastic (GRP). Other materials, as generally disclosed herein for the walls of the multi-chamber hollow profile 10 according to the invention, are alternatively possible.

[0072] Fig. 9shows an embodiment according to the invention in which the technical possibilities of the present invention are exemplified in its application as a modular system. The multi-chamber hollow profile 10 comprises an outer wall 10a, which defines the outer shape of the multi-chamber hollow profile 10. Twelve elongated filling elements, each with a hexagonal cross-section, are inserted into this outer wall 10a. Six of the elements (dark colored) consist of a dimensionally stable, solid fire protection material 20a with an envelope wall and are inserted into the cavity enclosed by the outer wall 10a. Alternatively, in a variant not shown, dimensionally stable filling elements made of fire protection material 20a without their own envelope profile could also be used. Six further elements form hollow chambers with walls made of a polymer and initially remain empty.After all twelve elements have been inserted into the cavity enclosed by the outer wall 10a, they are filled with a fire protection material 20b, either in the form of six hexagonally shaped solid fire protection material rods, or by pouring a liquid or powdered precursor material consisting of at least two mixed components into the six hollow chambers, which then hardens within the hollow chambers to form a solid fire protection material 20b, transforming the thus filled hollow chambers into fire protection material chambers 12. The 12 filling elements enclose five unfilled hollow chambers, at least one of which is intended as a receiving hollow chamber 14 for the later accommodation of cables, fittings, locking bars, or the like; all unfilled receiving hollow chambers 14 are each predominantly surrounded by fire protection material chambers 12. The remaining cavities of the multi-chamber hollow profile 10 form empty chambers.

[0073] Fig. 9a and 9bare schematic representations of two different variants of the ninth embodiment of the invention, in which filling elements are arranged and filled differently or have an octagonal cross-section ( Fig. 9b ).

[0074] Fig. 10 shows a variety of possible further embodiments of the multi-chamber hollow profile 10 according to the invention. As in the Fig. 2 to 9 shows Figure 10 The profiles are shown as a cross-section through the longitudinal profile. The first two multi-chamber hollow profiles from the left in the second row can be inserted either into an outer wall of a complex multi-chamber hollow profile or into a receiving space of a fire protection structure, for example, into a metal hollow profile of a window frame.

[0075] Fig. 11schematically illustrates a further manufacturing method of a multi-chamber hollow profile 10 according to the invention from two halves 10b, 10c, which are connected to one another as fire protection material chambers 12 with fire protection material 20, including two receiving hollow chambers 14.

[0076] Fig. 12 illustrates a variant of the manufacturing process according to Fig. 11 in which both halves 10b, 10c have exposed fire protection material 20 without a wall on the surfaces facing each other, so that after the connection of the two halves 10b, 10c a single fire protection material chamber 12 with a uniform filling of fire protection material 20 is present.

[0077] Halves 10b, 10c of the Fig. 1 1 and 12 could also contain different fire protection materials.

[0078] Fig. 13schematically illustrates a window frame profile 22 as an example of a fire protection structure with a receiving space 22a and a multi-chamber hollow profile 10 not according to the invention with an outer wall 10a, loosely inserted into the receiving space 22a. The multi-chamber hollow profile 10 comprises two receiving hollow chambers 14 surrounded by a wall 14a impermeable to fire protection material 20, which are separated from one another by a wall 14a and completely surrounded by a fire protection material chamber 12.

[0079] For fastening the multi-chamber hollow profile 10 in the receiving space 22a of the window frame profile 22, the latter and / or the former can be provided with fastening aids such as grooves ( Fig. 5a, 5b ), claws or hooks (not shown).

[0080] Fig. 14schematically shows another embodiment of a multi-chamber hollow profile 10 not according to the invention with an angular (L-shaped) cross-section adapted to a receiving space of a corresponding frame profile (not shown). A receiving hollow chamber 14 extending transversely to the longitudinal direction of the multi-chamber hollow profile 10 is provided for the passage of fastening bolts.

[0081] Fig. 15schematically shows another embodiment of a multi-chamber hollow profile 10 not according to the invention, which is inserted into a window frame profile 22. The window frame profile 22 comprises two metal profiles 30, between which there is a receiving space 22a into which the multi-chamber hollow profile 10 is inserted. The receiving space 22a has a rectangular cross-section, which is bounded on its wide sides by the two metal profiles 30 and which is open on its narrower longitudinal sides. The metal profiles 30 are held at a distance by fastening bolts 28, which are welded or otherwise connected to the metal profiles 30.

[0082] The multi-chamber hollow profile 10 comprises, similar to the embodiment of Fig. 1b a fire protection material chamber 12 filled with fire protection material 20 and transverse receiving hollow chambers 14 into which the fastening bolts 28 are inserted. The receiving hollow chambers 14 have walls 14a that are impermeable to the fire protection material 20. The metal profiles 30 can be cast with a fire protection material 20a, or fire protection material 20a can be inserted into the metal profiles 30 in the form of a solid bar or insert.

Claims

1. A multi-chamber hollow profile with an outer wall (10a), which comprises a plurality of fire protection material chambers (12), which are completely or partially filled with fire protection material (20, 20a, 20b), and at least one receiving hollow chamber (14), for use in fire protection structures, particularly in fire-resistant frames for fire protection elements, for example as an insert or sliding insert in a fire-resistant glazing frame (22), characterized in that the at least one receiving hollow chamber (14): • is arranged in the interior of the multi-chamber hollow profile (10), • is completely or predominantly surrounded by the plurality of fire protection material chambers (12); • has at least one end face which is arranged in the area of the end faces of the multi-chamber hollow profile (10), so that the at least one receiving hollow chamber (14) is accessible from outside the multi-chamber hollow profile (10); and is separated from the plurality of fire protection material chambers (12) completely or predominantly surrounding it by a wall (14a) which is at least largely impermeable to the fire protection material (20, 20a, 20b), and wherein the wall (14a) of the at least one receiving hollow chamber (14) and the walls (18, 18a, 18b) of the plurality of fire protection material chambers (12) extend parallel to the main axis of the multi-chamber hollow profile (10) and end faces of the at least one receiving hollow chamber (14) extend substantially parallel to end faces of the plurality of fire protection material chambers (12).

2. A multi-chamber hollow profile according to Claim 1, characterized in that the walls (10a, 14a, 18, 18a, 18b) forming the multi-chamber hollow profile (10) are formed in multiple parts from one or more different materials, wherein preferably at least one fire protection material chamber (12) and / or at least one receiving hollow chamber (14) is inserted as a separate filling element into the interior space enclosed by the outer wall (10a) of the multi-chamber hollow profile (10).

3. A multi-chamber hollow profile according to Claim 1, wherein the materials of the walls (10a, 14a, 18, 18a, 18b) are preferably selected from polymers, glass fiber or carbon fiber reinforced plastic and metals.

4. A multi-chamber hollow profile according to Claim 1, characterized in that the walls (10a, 14a, 18, 18a, 18b) forming the multi-chamber hollow profile (10) are formed in one piece from a single material, wherein the material of the walls (10a, 14a, 18, 18a, 18b) is preferably selected from polymers, glass fiber or carbon fiber reinforced plastic and metals.

5. A multi-chamber hollow profile according to Claim 1, characterized in that the at least one receiving hollow chamber (14) has at least one open end face for receiving components in the receiving hollow chamber (14), wherein preferably the open end face can be closed with at least one cover.

6. A multi-chamber hollow profile according to one of the preceding claims, characterized in that the receiving hollow chamber (14) has at least one cross-sectional narrowing for throttling a flow of hot gases in case of fire and / or the inside of the wall (14a) of the receiving hollow chamber (4) has, at least in some areas, a three-dimensional structuring with macroscopic unevenness, in particular grooves, ribs or a grain.

7. A multi-chamber hollow profile according to one of the preceding claims, characterized in that the plurality of fire protection material chambers (12) are completely or partially • filled with a solid and dimensionally stable fire protection material (20, 20a, 20b) and / or • filled with a kneadable, liquid, gel-like or powdery precursor material of a fire protection material (20, 20a, 20b), which has hardened in this fire protection material chamber (12) to form the fire protection material (20, 20a, 20b).

8. A multi-chamber hollow profile according to one of the preceding claims, characterized in that the plurality of fire protection material chambers (12) are filled with different fire protection materials (20, 20a, 20b) which differ from each other in their chemical composition and / or in their physical properties.

9. A multi-chamber hollow profile according to Claim 7 or 8, characterized in that the fire protection material is a multi-component system which was mixed from precursor materials before filling the plurality of fire protection material chambers (12), was poured into the plurality of fire protection material chambers (12) and has hardened there.

10. A multi-chamber hollow profile according to one of the preceding claims, characterized by fastening aids for fastening the multi-chamber hollow profile (10) in a receiving space of a fire protection structure.

11. A multi-chamber hollow profile according to one of the preceding claims, characterized in that the at least one receiving hollow chamber (14) is designed as a blind hole or the at least one receiving hollow chamber (14) is designed as a through-hole through the multi-chamber hollow profile (10) and is accessible from two opposite end faces.

12. A multi-chamber hollow profile according to one of the preceding claims, characterized in that the outer wall (10a) has a polygonal cross-section and / or the at least one receiving hollow chamber (14) has a polygonal cross-section and / or the at least one fire protection material chamber (12) has a polygonal cross-section.

13. A multi-chamber hollow profile according to one of the preceding claims, characterized in that the material and thickness of the outer wall (10a) are chosen such that the outer wall (10a) remains impermeable to the fire protection material (20, 20a, 20b) and its components up to a temperature of the outer wall (10a) of at least 70°C, in particular at least 100°C, and only allows the release and evaporation of cooling water from the fire protection material (20, 20a, 20b) at the high temperatures of a fire.

14. A fire protection structure with a receiving space (22a) and a multi-chamber hollow profile (10) according to one of the preceding claims inserted into the receiving space (22a).

15. A fire protection structure according to Claim 14, characterized in that the multi-chamber hollow profile (10) is loosely inserted into the receiving space (22a) or the multi-chamber hollow profile (10) is fixed in the receiving space (22a) by gluing, clamping, screwing, claws, clips, latches and / or with the help of cylinders or bolts.

16. A fire protection structure according to one of Claims 14 - 15, characterized by a metal frame hollow profile (22), whose hollow space forms the receiving space (22a).

17. A method for producing a multi-chamber hollow profile (10) according to one of Claims 1-13 characterized in that it comprises the following steps: Producing a multi-chamber hollow profile (10) from a plurality of hollow chambers without fire protection material; and Filling fire protection material (20, 20a, 20b) into at least two hollow chambers provided as fire protection material chambers (12).

18. A method according to Claim 17, characterized by the additional steps: • mixing precursor materials for a fire protection material (20, 20a, 20b) from a multi-component system to form a liquid mixture, • filling the liquid mixture into a plurality of hollow chambers provided as fire protection material chambers (12) and • allowing the filled mixture to harden to obtain the finished multi-chamber hollow profile (10) with at least one receiving hollow chamber (14) and a plurality of fire protection material chambers (12).

19. Use of a multi-chamber hollow profile (10) according to one of Claims 1 to 13 as an insert or sliding insert of a fire protection structure, in particular a fire protection frame.