A fire protection cover for a cable, pipe or conduit, a transit system comprising such a fire protection cover, and use thereof

Abstract

A fire protection cover (22) for a cable (11), pipe or conduit, comprising a first end, an opposite second end, a longitudinal center axis (A), an interior surface, an exterior surface and a through opening for receiving the cable (11), pipe or conduit, wherein the fire protection cover (22) is arranged to extend circumferentially around the cable (11), pipe or conduit and along a portion thereof. The fire protection cover (22) is made of an elastically deformable material. The interior surface of the fire protection cover (22) is formed with at least one cavity (23) extending helically around the interior surface of the fire protection cover (22), or axially along therewith.

Description

[0001] A FIRE PROTECTION COVER FOR A CABLE, PIPE OR CONDUIT, A TRANSIT SYSTEM COMPRISING SUCH A FIRE PROTECTION COVER, AND USE THEREOF

[0002] Technical Field

[0003] The present invention concerns a fire protection cover for a cable, pipe or conduit. More specifically the present invention is related to a fire protection cover for a cable, pipe or conduit, wherein the fire protection cover has a first end, an opposite second end, a longitudinal center axis, an interior surface, an exterior surface and a through opening for receiving the cable, pipe or conduit, wherein the fire protection cover is arranged to extend circumferentially around the cable, pipe or conduit and along a portion thereof in the axial direction.

[0004] The present invention is also related to a transit system comprising one or more of such fire protection covers. In addition, the present invention is related to a use of the fire protection cover in a transit system for leading one or more cables, pipes and / or conduits through a partition.

[0005] Background

[0006] A plurality of fire protection covers for cables and transit systems for cables are known in the prior art. Transit systems are generally used for leading cables and pipes through partitions, such as walls, floors and ceilings. Transit systems are used in many different environments, including cabinets, junction boxes, machines and similar, and for different industrial applications, such as for automotive and rolling stock applications, communication, power generation and distribution as well as marine and off-shore applications. Transit systems are often required to have a sealing function, e.g. sealing against different types of liquids, such as water, and / or gases, such as air, depending on the application and the requirements of the partition itself (wall, floor, bulkhead, deck, etc.). To provide a fastening and / or sealing function the cables or pipes are generally arranged in a through opening of a sealing module. One common type of such a module comprises two opposite module halves arranged around the cable orpipe, wherein the modules are arranged in a frame arranged in an opening in the partition. The modules in the frame are then compressed by means of a compression device to press the modules against the inside of the frame, against each other if applicable, and against the cables or pipes in the modules to fasten the modules and the cables or pipes and seal the transit. The transit system may be arranged to seal against liquid, such as water, gas, fire, rodents, termites, dust, moisture, etc. The transit system and the modules are, for example, arranged for receiving cables for electricity, communication, computers, etc. or pipes for different gases or liquids, such as water, compressed air, hydraulic fluid and cooking gas.

[0007] Fire protection may be of great value for improving safety and protecting property and thus there is a need to further improve prior art fire protection covers for cables and transit systems for leading cables through a partition.

[0008] Summary

[0009] In view of the above one object of the present invention is to provide an improved fire protection cover for cables and an improved transit system for leading cables through a partition.

[0010] The present invention is related to a fire protection cover for a cable, pipe or conduit, wherein the fire protection cover has a first end, an opposite second end, a longitudinal center axis, an interior surface, an exterior surface and a through opening for receiving the cable, pipe or conduit, wherein the fire protection cover is arranged to extend circumferentially around the cable, pipe or conduit and along a portion thereof in the axial direction, characterised in that the fire protection cover is made of an elastically deformable material, that the interior surface of the fire protection cover is formed with at least one cavity extending helically around the interior surface of the fire protection cover, or that the interior surface of the fire protection cover is formed with a plurality of cavities distributed circumferentially around the interior surface of the fire protection cover and extending in the axial direction, and the at least one cavity is open radially inward. The elastically deformable material in combination with the one or more cavities of the elastically deformable fire protection cover provide for efficient fireprotection while making it possible to manufacture the fire protection cover in a cost-efficient manner. The fire protection cover also provides mechanical outer protection of the cable, pipe and / or conduit. The fire protection cover can be used for a cable, a pipe or a conduit. However, in the description below only a cable is referred to for simplicity. It is understood that also one or more further cables and / or one or more pipes and / or one or more conduits is / are included in a corresponding manner. The fire protection cover can be arranged around a single cable, pipe or conduit but can also be arranged around a bundle of cables, pipes and / or conduits in a corresponding manner.

[0011] Support portions of the fire protection cover can be arranged with a substantially uniform circumference and uniform diameter for contacting a cable, having uniform diameter. The support portions can be arranged in helix-shape or can extend along axial planes. The support portions can be arranged with a substantially uniform circumference and uniform diameter in a default unbiased condition of the fire protection cover.

[0012] However, since the fire protection cover is elastically deformable the support portions and thus the inner diameter of the fire protection cover can be adapted to a range of diameters and can also adapt to a varying diameter when applied onto the cable.

[0013] The fire protection cover can comprise a spiral-shaped, such as helical, slit extending along the fire protection cover in the axial direction and extending from the interior surface of the fire protection cover to the exterior surface thereof in the radial direction, so that the fire protection cover is openable along said slit. Hence, the fire protection cover can be manufactured in an efficient manner and easily mounted anywhere on a cable, optionally in a snug fit. Alternatively, the slit can extend in any suitable manner from one end to the opposite end of the fire protection cover for opening thereof.

[0014] The fire protection cover can be formed by a strip of material arranged to form the through opening for receiving the cable. The strip of material can be formed into a spiral-shape for efficient manufacturing and simultaneously providing the helical slit to facilitate mounting on a cable. Hence, the strip of material can be arranged in the shape of a helix, such as a circular helix (i.e. having constant radius). The strip of material can extend helically around the cable and along a portion of the cable as a helix.The strip of material can easily be extruded or molded with the one or more cavities and then formed into a sleeve with the through opening for receiving the cable, e.g. by winding the strip of material into the spiral-shape, such as the helical shape. Hence, a single cavity can be arranged as a single helix, two cavities can be arranged in parallel as a double helix, three cavities can be arranged in parallel as a triple helix and so forth for the desired number of cavities. The at least one cavity can extend helically around the cable and along a portion of the cable as a helix.

[0015] Optionally, the strip of material can be vulcanized, e.g. after forming into the spiral-shape. The fire protection cover can be formed in rubber or TPE or other suitable elastically deformable materials, wherein the fire protection cover can be opened manually and a cable can be arranged inside the through opening of the fire protection cover manually by hand.

[0016] The strip of material can be formed with one or more arcs forming the one or more cavities. The cavity or each cavity can be arc-shaped, wherein the inside of the arc is facing the cable. Hence, the fire protection cover can be formed with the cavities in an efficient manner while saving material. The arcs can be arranged helically, such as in the form of a double helix, triple helix or further arcs arranged helically in parallel. Arcshaped cavities also results in inclusion of a substantial amount of air when arranged on a cable, such as a cable having circular cross section.

[0017] The cavities can be open radially inward. Hence, the flexibility and elastic deformability is increased by the shape of the fire protection cover to facilitate mounting thereof on the cable.

[0018] The present invention is also related to a transit system for leading one or more cables, pipes and / or conduits through a partition, wherein the transit system comprises at least one compressible body, a compression device and one or more cables, pipes and / or conduits having a longitudinal axis, wherein the compressible body has a through opening receiving one of said cables, pipes or conduits, wherein the compression device is configured to compress the compressible body for sealing around the cable, pipe or conduit, and wherein the transit system further comprises a fire protection cover arranged around the cable, pipe or conduit, wherein the fire protection cover extends circumferentially around the cable, pipe or conduit and along a portion thereof in theaxial direction, characterised in that the fire protection cover is formed in an elastically deformable material, that the fire protection cover is arranged outside of the through opening of the compressible body, that the fire protection cover comprises at least one cavity extending helically around the cable, pipe or conduit, or a plurality of cavities distributed circumferentially around the cable, pipe or conduit and extending along therewith in the axial direction, and that the at least one cavity is open radially inward.

[0019] The fire protection cover can be arranged adjacent the compressible body.

[0020] Hence, a particularly favorable fire protection of the transit can be obtained.

[0021] The at least one cavity or plurality of cavities can comprise air. The one or more cavities can be naturally filled with air, as the cavities are open towards the cable. Airfilled cavities aids in insulation and fire protection and provides improved fire protection. Alternatively, the cavities are filled with a fire-resistant gas or fire-resistant material.

[0022] The present invention is also related to the use of a fire protection cover for fire protection in a transit system as set out above. For example, a plurality of fire protection covers can be arranged on a cable, pipe or conduit. For example, multiple layers of fire protection covers can be arranged on the cable, pipe or conduit for increased fire protection performance and / or mechanical protection.

[0023] Further objects and advantages of the present invention will be clear to a person skilled in the art when reading the detailed description below.

[0024] Brief Description of the Drawings

[0025] Fig. l is a schematic perspective view of a transit system for leading cables through a partition according to one embodiment, which transit system is provided with compressible sealing modules, stayplates, a compression device and fire protection covers on the cables,

[0026] Fig. 2 is a schematic perspective view of a compressible body in the form of a conventional sealing module half of a sealing module, illustrating the general concept of a groove and peelebale sheets thereof,Fig. 3 is a schematic side view of a part of a fire transit system, wherein a fire protection cover according to a first embodiment is arranged on a cable going through the transit system,

[0027] Fig. 4 is a schematic section view of a part of a transit system, wherein the fire protection cover according to the first embodiment is arranged on a cable arranged in a sealing module,

[0028] Fig. 5 is a schematic section view of a part of the fire protection cover according to the first embodiment,

[0029] Fig. 6 is a schematic side view of a part of a transit system, wherein a fire protection cover according to a second embodiment is arranged on a cable going through the transit system,

[0030] Fig. 7 is a schematic section view of a part of a transit system, wherein the fire protection cover according to the second embodiment arranged on a cable arranged in a sealing module,

[0031] Fig. 8 is a schematic section view of a part of the fire protection cover according to the second embodiment,

[0032] Fig. 9 is a schematic side view of a part of a transit system, wherein a fire protection cover according to a third embodiment is arranged on a cable going through the transit system,

[0033] Fig. 10 is a schematic section view of a part of a transit system, wherein the fire protection cover according to the third embodiment is arranged on a cable arranged in a sealing module,

[0034] Fig. 11 is a schematic section view of a part of the fire protection cover according to the third embodiment,

[0035] Fig. 12 is a schematic side view of a part of a transit system, wherein a fire protection cover according to a fourth embodiment is arranged on a cable going through the transit system,

[0036] Fig. 13 is a schematic section view of a part of a transit system, wherein the fire protection cover according to the fourth embodiment is arranged on a cable arranged in a sealing module, andFig. 14 is a schematic cross-section view of the fire protection cover according to the fourth embodiment.

[0037] Description of Embodiments

[0038] With reference to Fig. 1, a transit system 10 for passing at least one cable 11, at least one pipe and / or at least one conduit through a partition 12 is illustrated schematically according to one embodiment. The transit system 10 is arranged for passing one or more cables 11, pipes and / or conduits through a partition 12 in the form of a wall, a floor, a roof or a ceiling. The partition 12 is illustrated by means of dashed lines in Fig. 1. For example, the transit system 10 is arranged for passing cables 11, such as cables for electricity, communication, computers etc., or pipes for different gases or liquids, such as water, compressed air, hydraulic fluid, cooking gas or other types of liquids or gases, or conduits for routing cable or pipes therethrough. Cables, pipes and conduits are led in an axial direction through the transit system 10. Even though the following description is related to cables 11, pipes and / or conduits sometimes only cables 11 are referred to for simplicity.

[0039] The transit system 10 according to Fig. 1 is arranged for receiving one or more sealing modules 13, a compression device 14 and optionally one or more stayplates 15. The sealing modules 13 may be arranged in different sizes and a plurality of different sealing modules 13 may be arranged in different configurations. For example, the compression device 14 and the stayplates 15, if applicable, are of conventional type. For example, the compression device 14 comprises conventional wedges operated by one or more screws.

[0040] The sealing modules 13 are compressible. For example, the sealing modules 13 are resilient and comprises two opposite and compressible bodies 16 in the form of sealing module halves, wherein the compressible body 16 is a compressible sealing module half. Optionally, each compressible body 16 comprises a plurality of peelable sheets 17 placed in a semi-cylindrical groove 18 as illustrated in Fig. 2. For example, the peelable sheets 17 as such are of conventional type and are provided to adapt the diameter of the groove 18 to the outer diameter of the cable 11. Optionally, a suitable number of peelable sheets 17 are removed to adapt the sealing module 13 to thediameter of the cable 11, wherein the cable 11 is placed in the compressible body 16 and a sealing module 13 is formed by placing two module halves 16 on top of each other so that the grooves 18 are facing each other and form an opening for the cable 11. The compressible body 16 also comprises an outer surface 19. The sealing modules 13 are resilient, and a suitable material may be natural or synthetic rubber, such as an EPDM rubber, optionally with additional fillers, but other alternatives are possible, such as TPE.

[0041] In the embodiment of Fig, 1, the transit system 10 comprises a frame 20, wherein the one or more sealing modules 13 are arranged within the frame 20, optionally together with the one or more stayplates 15 and the compression device 14. For example, the frame 20 is of a conductive material, such as metal. Alternatively, the frame 20 is of plastic materials. For example, the frame 20 is of conventional type. A blind 21, such as a rubber or plastic core, may be arranged in the opening formed by the grooves 18 to provide sealing if a cable 11 is not arranged through the sealing module 13. The blind 21 is removed prior to the arrangement of a cable 11 therein. For example, the blind 21 is of conventional type.

[0042] In the illustrated embodiments, the sealing module 13 formed by the compressible bodies 16 has a parallelepiped outer shape (i.e. block shape).

[0043] Alternatively, the transit system comprises a sealing module with a cylindrical outer shape that is formed of a single cylindrical compressible body or two semicylindrical or semiannular compressible bodies with optional peelable sheets to form a round seal for a single cable. Such round seals are known and are not illustrated in the drawings.

[0044] Alternatively, a plurality of sealing modules having a shape as described with reference to Fig. 1 is arranged within a rectangular opening of the round seal. The compression device for the round seal is formed by front and rear fittings connected by screws for compressing the sealing module in the axial direction. The transit system comprising a round seal is, e.g. positioned in a sleeve or in an opening in the partition 12.

[0045] The transit system 10 comprises at least one fire protection cover 22. The fire protection cover 22 is made of an elastically deformable material, has a first end, an opposite second end, a longitudinal center axis A, an interior surface, an exterior surface and a through opening for receiving the cable 11. Hence, the fire protection cover 22 isconfigured to be arranged on the cable 11 to surround an exterior surface of the cable 11. Hence, the fire protection cover 22 is arranged to extend circumferentially around the cable 11 and along a portion of the cable 11 in the axial direction. For example, the fire protection cover 22 comprises a single and axially extending through opening for receiving a single cable 11 or for receiving one or more cables, pipes and / or conduits. Hence, the axially extending through opening can receive a single cable 11 but may also be used for receiving a bundle of cables, pipes and / or conduits. The interior surface of the fire protection cover 22 is arranged for contacting the exterior surface of the cable 11. For example, parts of the interior surface of the fire protection cover 22 are arranged for contacting the exterior surface of the cable 11. For example, parts of the interior surface of the fire protection cover 22 are contacting an outer jacket of the cable 11. The fire protection cover 22 is openable to receive a portion of the cable 11.

[0046] The fire protection cover 22 is arranged outside of the through opening of the sealing module 13 formed by the grooves 18 of the compressible bodies 16. Hence, the fire protection cover 22 is arranged outside the grooves 18 of the compressible bodies 16 in the axial direction. For example, the fire protection cover 22 is arranged next to the sealing module 13 and optionally adjacent to the sealing module 13. For example, one end of the fire protection cover 22 is abutting the sealing module 13. In the case of a round seal, one end of the fire protection cover 22 is arranged next to and / or is abutting the compressible body or compressible bodies of the round seal in a similar manner. In Fig. 1, the fire protection covers 22 are arranged close to the sealing modules 13 of the cables they are connected to. The fire protection covers 22 can be contacting the sealing modules 13.

[0047] With reference to Figs. 3 to 5 the fire protection cover 22 is illustrated more in detail according to a first embodiment thereof. In Fig. 3, the fire protection cover 22 is illustrated from the side arranged on the cable 11 and adjacent a sealing module 13 arranged within the frame 20 of the transit system 10. The frame 20 is only illustrated in part in Fig. 3. It is noted that the frame 20 may be arranged within the opening in the partition 12 (not illustrated in Fig. 3). Hence, the fire protection cover 22 extends away from the sealing module 13 in the axial direction along a portion of the cable 11. The fire protection cover 22 may be arranged in contact with the sealing module 13 or maybe arranged with a minor gap to the same. As can be seen in Fig. 3, the fire protection cover 22 is arranged as a helix around the cable 11. A portion of the fire protection cover 22 is illustrated in Fig. 4, wherein one end thereof is abutting the sealing module 13 and the fire protection cover 22 is contacting the cable 11 with parts of its interior surface.

[0048] The fire protection cover 22 comprises one or more cavities 23, which is illustrated in Figs. 4 and 5 according to the first embodiment. In the first embodiment, the fire protection cover 22 comprises first and second cavities 23a, 23b extending circumferentially around the cable 11. In the first embodiment, the fire protection cover 23 comprises two cavities 23a, 23b. Alternatively, the fire protection cover 22 comprises a single cavity or more cavities, such as three or four cavities. According to the first embodiment, the fire protection cover 22 is formed of a strip of material arranged as a spiral around the cable 11. Hence, the strip of material is formed into spiral shape having an axially extending through opening for the cable 11. For example, the strip of material is formed into a helix-shape. Thus, the fire protection cover 22 has an axially extending through opening for the cable 11. The strip of material is formed with said cavities 23a 23b. Hence, the cavities 23a, 23b also extend around the cable 11 as spirals, such as helices. For example, the first and second cavities 23a, 23b are arranged in parallel. For example, the first and second cavities 23a, 23b extend helically around the cable 11 and along a portion of the cable 11 as a double helix. The cavities 23a, 23b are formed by the strip of material being shaped with arcs 24. Hence, the fire protection cover 22 comprises first and second arcs 24a, 24b. Also the arcs 24a, 24b extend helically, wherein the first and second arcs 24a, 24b extend around the cable 11 along a portion thereof as a double helix. Hence, the exterior surface of the fire protection cover 22 is formed with the arcs 24a, 24b, wherein the interior surface is formed with the corresponding cavities 23 a, 23b. The interior surface of the fire protection cover 22 is also formed with arcs, wherein the cavities 23a, 23b outer periphery are arc-shaped. Between the first and second cavities 23a, 23b and / or at one or both sides thereof, the interior surface of the fire protection cover 22 comprises support portions 25 for contacting the exterior surface of the cable 11. For example, the support portions 25 extend helically. For example, the support portions 25 are arrangedwith uniform circumference for abutting a cable 11 or a pipe having uniform diameter. For example, the arcs 24a, 24b and the support portions 25 are arranged in parallel. For example, the cavities 23a, 23b are open towards the cable 11. For example, the cavities are arc-shaped in a direction opposite their opening towards the cable 11. For example, the cavities 23a, 23b are filled with air.

[0049] The strip of material is, for example, formed in rubber, TPE or similar elastically deformable materials. For example, the strip of material is formed in the same material as the sealing modules 13. Hence, similar material characteristics and performance as the sealing modules 13 are obtained. The strip of material forms the fire protection cover 22. Hence, the fire protection cover 22 may be formed in the same material as the strip of material. The strip of material is, e.g. formed by extrusion, mold injection or similar forming techniques for forming elastomer materials. Hence, the strip of material is extruded or formed with a profile having the cavities 23a, 23b and optionally also the arcs 24a, 24b. Then, the strip of material is wound up on a rod or similar cylindrical or tubular body in spiral-shape, such as a helix-shape, where the strip of material is vulcanized or solidified to form the elastically deformable spiral-shape of the fire protection cover 22. Alternatively, the spiral-shaped fire protection cover 22 is formed by injection molding or other suitable forming technique. The fire protection cover 22 is elastically deformable, so that it may be applicable to cables 11 of different diameters. Hence, the fire protection cover 22 may be applicable to a wide range of various outer diameters of cables even though the fire protection 22 has a default inner diameter after forming due to its inherent resilient flexible properties. Also, it may be possible to use the fire protection cover 22 for a plurality of cables, pipes and / or conduits. For example, a single fire protection cover 22 can be arranged around a bundle of cables 11, pipes and / or conduits.

[0050] In the first embodiment, the longitudinal section of the arcs 24 together with the supporting portions 25 are substantially in the shape of omega signs. Hence, the profile of the strip of material resembles one or more omega signs. For example, the strip of material is formed by extrusion using a nozzle having an opening for forming the profile of the strip of material. For example, said nozzle is formed with thecorresponding arcs as the arcs 24a, 24b of the strip of material forming the fire protection cover 22.

[0051] The fire protection cover 22 is formed with a slit 26, so that the fire protection cover 22 is openable for receiving the cable 11. Since the fire protection cover 22 is formed by a strip of material formed into a helical shape in the first embodiment, the slit 26 is spiral-formed or helical. The slit 26 extends along the fire protection cover 22 in the axial direction A from the interior surface of the fire protection cover 22 to the exterior surface thereof in the radial direction, so that the fire protection cover 22 is openable along said slit 26. In the case the fire protection cover 22 is formed by injection molding or other type of molding, the fire protection cover 22 may comprise a breakable notch forming the slit 26 when broken during the first use of the fire protection cover 22.

[0052] In the first embodiment, a first long side of the strip of material is formed with a protrusion 27 forming a recess 28 for receiving an edge portion 29 at the opposite second long side. For example, the protrusion 27 and the neighboring arc 24 form the recess 28. Hence, the recess 28 and the edge portion 29 are spiral-shaped or helical when the strip of material is wound up to form the fire protection cover 22. The edge portion 29 is removably insertable into the recess 28. Optionally, the recess 28 and the edge portion 29 are formed with cooperating projections for releasable fastening of the edge portion 29 to the recess 28 along the slit 26. For example, the recess 28 is arranged in parallel to the cavities 23a, 23b.

[0053] With reference to Figs. 6 to 8 the fire protection cover 22 is illustrated according to a second embodiment. In Fig. 6, fire protection cover 22 is illustrated from the side arranged on the cable 11 and adjacent to a sealing module 13 arranged within the frame 20 of the transit system 10. The frame 20 is only illustrated in part in Fig. 6 and the sealing module 13 is illustrated in part in Fig. 7. A portion of the fire protection cover 22 is illustrated in Figs. 7 and 8. The fire protection cover 2 according to the second embodiment comprises a plurality of cavities 23 extending circumferentially in spiralshape as disclosed with reference to the first embodiment. However, in the second embodiment, the fire protection cover 22 is formed by a strip of material having three cavities 23a-c and three arcs 24a-c, wherein said strip of material is arranged in spiralshape or as a helix, so that the long sides of said strip of material is contacting each other along the slit 26. In the second embodiment, the fire protection cover 22 is formed with a support portion 25 between every cavity 23. Hence, the strip of material forming the fire protection cover 22 of the second embodiment has four support portions 25 for contacting the cable 11. The strip of material has a profile of three connected arcs 24a-c. Similar to the first embodiment, the strip of material according to the second embodiment is wound around a rod, tube or similar into the spiral shape, so that a plurality of revolutions of the strip of material forms the fire protection cover 22 and thus also the spiral-shaped slit 26, so that the fire protection cover 22 is openable and can be arranged around the cable 11 in an easy manner. Hence, the fire protection cover 22 comprises a plurality of spiral-shaped cavities 23a-c, e.g. filled with air, extending circumferentially around the cable 11 and also extending along a portion of the cable 11 in the axial direction. For example, the strip of material is formed by extrusion, wherein the strip of material is an extruded profile having the cavities 23a-c and the supporting portions 25 and optionally also the arcs 24a-c. Alternatively, the strip of material is formed in another way, such as by injection molding. Then, the strip of material is wound onto a rod, tube or similar cylindrical object into the spiral-shape or helix-shape, wherein it is vulcanized or solidified to its elastically deformable spiral shape.

[0054] Alternatively, the fire protection cover 22 is formed with the cavities 23a-c and in spiral shape by injection molding or by another suitable forming technique for elastomer materials, such as rubber, TPE, or similar. In such a case, the cavities 23 may extend circumferentially in parallel and radially extending planes. Wherein the slit 26 may extend axially without spiral form, e.g. extending straight, entirely or in increments, in the axial direction.

[0055] With reference to Figs. 9 to 11 the fire protection cover 22 is illustrated according to a third embodiment. In Fig. 9, fire protection cover 22 is illustrated from the side arranged on the cable 11 and adjacent to a sealing module 13 arranged within the frame 20 of the transit system 10. The frame 20 is only illustrated in part in Fig. 9 and the sealing module 13 is illustrated in part in the section view of Fig. 10. A portion of the fire protection cover 22 is illustrated in Figs. 10 and 11. The fire protection cover 22 according to the third embodiment differs from the second embodiment in that it isformed by a strip of material having two cavities 23 a, 23b and two arcs 24a, 24b. As for the first and second embodiments, the strip of material is arranged in spiral-shape, so that the long sides of said strip of material is contacting each other along the slit 26 and form a sleeve with the through opening for receiving the cable 11. In the third embodiment, the fire protection cover 22 is formed with a support portion 25 between every cavity 23. Hence, the strip of material forming the fire protection cover 22 of the third embodiment has three support portions 25 for contacting the cable 11. The strip of material of the third embodiment has a profile of two connected arcs 24a, 24b. A plurality of revolutions of the strip of material forms the fire protection cover 22 with the through opening for the cable 11 and the helical slit 26, so that the fire protection cover 22 is openable and the cable 11 can be received in the through opening formed by the fire protection cover 22.

[0056] With reference to Figs. 12 to 14 the fire protection cover 22 is illustrated according to a fourth embodiment. In Fig. 12, fire protection cover 22 is illustrated from the side arranged on the cable 11 and adjacent to a sealing module 13 arranged within the frame 20 of the transit system 10. The frame 20 is only illustrated in part in Fig. 12 and the sealing module 13 is illustrated in part in the section view of Fig. 13. A portion of the fire protection cover 22 is illustrated in Figs. 13 and 14. The fire protection cover 22 according to the fourth embodiment differs from the other embodiments in that the cavities 23 extend in parallel to the center axis A. Hence, a center axis of each of the cavities 23 extends in parallel to the center axis A of the fire protection cover 22. Hence, the arcs 24 also extend in the axial direction, such as only in the axial direction. Thus, a cross-section profile of the fire protection cover 22 in a radial plane perpendicular to the center axis A is formed with the arcs 24. The cavities 23 and the arcs 24 are distributed around the circumference of the cable 11. Also, the support portions 25 extend in the axial direction. Optionally, the slit 26 extends in an axial plane. Alternatively, the slit 26 is arranged in spiral-shape as described above with reference to the first to third embodiments. The fire protection cover 22 of the fourth embodiment is, e.g. formed by a tubular profile with or without the slit 26. The tubular profile can be provided with the slit 26 after forming of the tubular profile, such as by cutting. For example, the tubular profile is formed by extrusion, molding or other suitable forming technique.Alternatively, the fire protection cover 22 is formed by a strip of material, wherein the strip of material is formed into a tubular shape, optionally with the slit 26.

Claims

CLAIMS1. A fire protection cover (22) for a cable (11), pipe or conduit, wherein the fire protection cover (22) has a first end, an opposite second end, a longitudinal center axis (A), an interior surface, an exterior surface and a through opening for receiving the cable (11), pipe or conduit, wherein the fire protection cover (22) is arranged to extend circumferentially around the cable (11), pipe or conduit and along a portion thereof in the axial direction, characterised in thatthe fire protection cover (22) is made of an elastically deformable material,the interior surface of the fire protection cover (22) is formed with at least one cavity (23) extending helically around the interior surface of the fire protection cover (22), or a plurality of cavities (23) distributed circumferentially around the interior surface of the fire protection cover (22) and extending in the axial direction, andthe at least one cavity (23) is open radially inward.

2. The fire protection cover of claim 1, wherein the fire protection cover (22) comprises a helical slit (26) extending along the fire protection cover (22) in the axial direction and extending from the interior surface of the fire protection cover (22) to the exterior surface thereof in the radial direction, so that the fire protection cover (22) is openable along said slit (26).

3. The fire protection cover of claim 1 or 2, wherein the fire protection cover (22) is formed by a strip of material arranged to form the through opening for receiving the cable (11), pipe or conduit.

4. The fire protection cover of claim 3, wherein the strip of material is formed with one or more arcs (24) forming the one or more cavities (23).

5. The fire protection cover of any of the preceding claims, wherein the fire protection cover (22) is formed in a vulcanized material.

6. The fire protection cover of any of the preceding claims, wherein the fire protection cover (22) is formed in rubber or TPE.

7. The fire protection cover of any of the preceding claims, wherein the fire protection cover (22) is formed by an extruded profile, wherein the extruded profile is arranged to form the through opening for receiving the cable (11), pipe or conduit.

8. The fire protection cover of any of the preceding claims, wherein the at least one cavity (23) is helix-shaped.

9. The fire protection cover of any of the preceding claims, wherein the fire protection cover (22) comprises a plurality of helical cavities arranged in parallel and wherein each of said cavities (23) is open radially inward.

10. A transit system (10) for leading one or more cables (11), pipes and / or conduits through a partition, wherein the transit system (10) comprises at least one compressible sealing module (16), a compression device (14) and one or more cables (11), pipes and / or conduits having a longitudinal axis, wherein the sealing module (16) has a through opening receiving one of said cables (11), pipes or conduits, wherein the compression device (14) is configured to compress the sealing module (16) for sealing around the cable (11), pipe or conduit, and wherein the transit system (10) further comprises a fire protection cover (22) arranged around the cable (11), pipe or conduit, wherein the fire protection cover (22) extends circumferentially around the cable (11), pipe or conduit and along a portion thereof in the axial direction, characterised in that the fire protection cover (22) is formed in an elastically deformable material, the fire protection cover (22) is arranged outside of the through opening of the sealing module (16),the fire protection cover (22) comprises at least one cavity (23) extending helically around the cable (11), pipe or conduit, or a plurality of cavities (23) distributed circumferentially around the cable (11), pipe or conduit and extending along thereof in the axial direction, andthe at least one cavity (23) is open radially inward.

11. The transit system of claim 10, wherein the fire protection cover (22) is arranged adjacent the sealing module (16) and outside the sealing module (16).

12. The transit system of claim 10 or 11, wherein the at least one cavity (23) comprises air.

13. The transit system of any of claims 10-12, wherein the at least one cavity (23) connects to the cable (11), pipe or conduit.

14. The transit system of any of the preceding claims, wherein the fire protection cover (22) comprises a helical slit (26) extending along the fire protection cover (22) in the axial direction and extending from an interior surface of the fire protection cover (22) to an exterior surface thereof in the radial direction, so that the fire protection cover (22) is openable along said slit (26).

15. Use of a fire protection cover (22) according to any of claims 1-9 in a transit system (10) according to any of claims 10-14 for fire protection.

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