An installation for leading cables or pipes through a casted partition, method for obtaining such an installation and use of a sleeve assembly

Abstract

An installation comprising a casted partition (28) and a sleeve assembly (10) for leading one or more cables and / or pipes through said partition (28). The sleeve assembly (10) forms an axially extending through opening in the partition (28) and comprises at least a first sleeve (11) and a second sleeve (12), wherein each of the sleeves (11, 12) has a first end portion and an opposite second end portion, and wherein the second end portion of the first sleeve (11) receives a first end portion of the second sleeve (12). The first sleeve (11) is casted into the partition, wherein the first end portion of the second sleeve (12) is inserted into the second end portion of the first sleeve (11) and the second sleeve (12) projects from the partition (28). The second sleeve (12) comprises one or more radially extending fastening elements (24) for fastening of a conduit (29) to the second sleeve (12). Disclosed is also a method for obtaining such an installation, a sleeve assembly and use thereof.

Description

The present invention is related to an installation for leading cables and / or pipes through a casted partition. More specifically, the present invention is related to an installation comprising a casted partition and a sleeve assembly for leading one or more cables and / or pipes through said partition. The sleeve assembly forms an axially extending through opening in the partition and comprises at least a first sleeve and a second sleeve, wherein each of the sleeves has a first end portion and an opposite second end portion, and wherein the second end portion of the first sleeve receives a first end portion of the second sleeve. Such installations are used for leading cables and / or pipes through casted partitions, such as walls, ceilings, floors, intermediate floors, etc., formed by a setting material, such as concrete or similar construction materials.The present invention is also related to a method for obtaining such an installation. The present invention is also related to the use of a sleeve assembly for leading cables and / pipes through a casted partition. The present invention is also related to sleeve assemblies for leading cables and / or pipes through casted partitions.BackgroundDifferent types of installations are used to lead cables and / or pipes through casted walls and other casted partitions. Casted partitions are often made of concrete or similar materials and may also be called moulded partitions. The casted partition can be pre-casted or casted in-situ. An installation or assembly for leading cables and / or pipes through partitions are generally known as a cable transit or a cable lead-through. To obtain a cable transit in a casted partition a sleeve is casted into the partition to form a through opening for leading one or more cables trough the sleeve and through the partition. Hence, the sleeve forms a through opening in the partition. Cable transits may have to seal against fluid, gas, fire, rodents, termites, dust, moisture etc. and many receive cables for electricity, communication, computers etc., or pipes for different gases or liquids such as water, compressed air, hydraulic fluid and cooking gas. In such cases, a seal for sealing around the one or more cables and / or pipes can be arranged inside the sleeve. Such seals can comprise a cylindrical compressible body with one or more openings for the one or more cables and / or pipes, wherein the compressible body can be compressed by at least one front fitting, at least one rear fitting and a plurality of fastening elements going through holes of the compressible body in the axial direction and connecting the front and rear fittings for compressing the compressible body and provide a seal around the one or more cables and / or pipes.One problem with cable transits of prior art is that they lack flexibility and functionality depending on the partition and intended use.SummaryIn view of the above, one object of the present invention is to provide an installation for leading one or more cables and / or pipes through a casted partition that provides for efficient installation and flexibility in application possibilities.The present invention is related to an installation comprising a casted partition and a sleeve assembly for leading one or more cables and / or pipes through said partition, wherein the partition has a first face and an opposite second face, wherein the sleeve assembly forms an axially extending through opening in the partition and comprises at least a first sleeve and a second sleeve, wherein each of the sleeves has a first end portion and an opposite second end portion, and wherein the second end portion of the first sleeve receives a first end portion of the second sleeve, characterised in that the first sleeve is casted into the partition, the first end portion of the second sleeve is inserted into the second end portion of the first sleeve, wherein the second sleeve projects from the partition, and the second sleeve comprises one or more radially projecting fastening elements for fastening of a conduit to the second sleeve. The first sleeve is casted into the partition, wherein the second sleeve is inserted into the first sleeve and projects from the partition. The second sleeve projects outward from the second face of the partition. The second sleeve is partially arranged outside of the partition. Hence, the second sleeve can be inserted into the first sleeve after casting of the partition and provides for increased flexibility and efficient mounting of a conduit to the sleeve assembly when desired, also when the first sleeve has a relatively short length and has been casted into a partition with a relatively thin thickness. Simultaneously, the present invention allows for arranging a seal inside the first sleeve if required. For example, the length of the first sleeve in the axial direction can be 150 mm or less, such as 120, 100 mm, 80 mm or even less. For example, the length of the first sleeve corresponds to the thickness of the partition. A length of the sleeve assembly, i.e. when the second sleeve is connected to the first sleeve, is larger than the thickness of the partition.The fastening element or fastening elements of the second sleeve for fastening of the conduit can be arranged on an interior circumferential surface of the second sleeve. Hence, the conduit can be inserted into the second sleeve for improved installation and sealing properties.The first end portion of the first sleeve can be flush with the first face of the partition and the second end portion of the first sleeve can be flush with the second face of the partition. Hence, only the first sleeve is casted into the partition and the length of the first sleeve corresponds to the thickness of the partition, wherein the second sleeve can be added after casting so that it projects from the partition to provide efficient fastening of the conduit to the sleeve assembly while allowing for a seal to be arranged inside the first sleeve.A round seal for sealing around the one or more cables and / or pipes can be arranged inside the first sleeve, wherein said round seal comprises a cylindrical compressible body, at least one front fitting, at least one rear fitting and a plurality of fastening elements going through holes of the compressible body in the axial direction and connecting the front and rear fittings for compressing the compressible body in the axial direction to seal around the one or more cables and / or pipes. When the compressible body is compressed in the axial direction it expands in the radial directions. The structure with the first and second sleeves allows for having a round seal in the first sleeve while the conduit can be connected to the second sleeve. The cables or pipes extend in the axial direction through the round seal.The first sleeve can be fastened to the second sleeve. For example, the second sleeve is formed with a plurality of radially extending projections and the first sleeve is formed with a plurality of axially extending recesses, wherein each of the recesses is arranged for receiving one of the projections, and wherein each of the recesses is connected to a circumferentially extending groove, so that the projections can be inserted into the recesses in the axial direction and rotated into the grooves for fastening of the second sleeve to the first sleeve. Hence, easy and efficient fastening of the second sleeve to the first sleeve is achieved. The groove may extend 90 degrees or less in the circumferential direction.The grooves are formed with a first stop and a second stop in opposite circumferential directions. The stops make it possible to give the operator tactile feedback when the second sleeve has been positioned properly. For example, one of said stops is aligned with the recess, which facilitates disassembling of the second sleeve from the first sleeve.The grooves have opposite surfaces, wherein at least one of said surfaces can be inclined in the circumferential direction for displacing the first and second sleeves in the axial direction toward each other when the projections are rotated into the grooves. Hence, the groove can be extending in an angle in the axial direction, so that the second sleeve is tightened towards the first sleeve upon rotation thereof. For example, at least the surface closest to the second end portion, i.e. the outermost surface in the axial direction, is inclined axially in the circumferential direction, so that rotation of the projections along the grooves forces the second sleeve in the axial direction towards the first sleeve.The sleeve assembly can comprise a seal ring between the first sleeve and the second sleeve for sealing between them. In combination with the groove extending in an angle, the seal ring can be compressed when the first sleeve is rotated into position and simultaneously forced against the first sleeve in the axial direction. Hence, efficient and reliable sealing of the first and second sleeves is achieved.The present invention is also related to a method for obtaining an installation for leading one or more cables and / or pipes through a casted partition, comprising the steps ofa) providing first and second casting structures for casting of the partition and forming a first face and an opposite second face of the partition,b) arranging a first sleeve between the first and second casting structures, wherein a first end portion of the first sleeve is connected to the first casting structure and a second end portion of the first sleeve is connected to the second casting structure,c) pouring a setting material between the first and second casting structures and around a circumferentially extending exterior surface of the first sleeve,d) removing the first and second casting structures, e.g. after setting or solidifying of the setting material,e) inserting a first end portion of a second sleeve into the second end portion of the first sleeve, so that the second sleeve projects from the second face of the partition, and f) connecting a conduit to one or more radially extending fastening elements of the second sleeve.The present invention is also related to a use of a sleeve assembly for leading one or more cables and / or pipes through a casted partition, wherein the partition has a first face and an opposite second face, wherein the sleeve assembly forms an axially extending through opening in the partition and comprises at least a first sleeve and a second sleeve, wherein each of the sleeves has a first end portion and an opposite second end portion, wherein the second end portion of the first sleeve receives a first end portion of the second sleeve, wherein the first sleeve is casted into the partition, the first end portion of the second sleeve is inserted into the second end portion of the first sleeve, and the second sleeve comprises one or more radially extending fastening elements for fastening of a conduit to the second sleeve. The second sleeve can be inserted into the first sleeve after the first sleeve has been casted into the partition. Thus, the second sleeve can project from the partition, such as the second face of the partition. A conduit can be connected to a second end portion of the second sleeve. A round seal can be arranged in the first sleeve.The present invention is also related to a sleeve assembly for leading one or more cables and / or pipes through a casted partition, wherein the sleeve assembly comprises at least a first sleeve and a second sleeve, wherein each of the sleeves has a first end portion and an opposite second end portion, and wherein the second end portion of the first sleeve is connectable to a first end portion of the second sleeve by a fastening arrangement, characterised in that the first end portion of the second sleeve is inserted into the second end portion of the first sleeve and projects therefrom, and the second sleeve comprises one or more radially extending fastening elements for fastening of a conduit to the second sleeve.The sleeve assembly, optionally with the first sleeve casted into the partition and optionally with the round seal arranged in the first sleeve and with or without the conduit connected to the second sleeve, can be called a cable transit.Further characteristics and advantages of the present invention will become apparent from the description of the embodiments below, the appended drawings and the dependent claimsBrief Description of the DrawingsThe invention will be described further below by way of embodiment examples and with reference to the enclosed drawings, in which:Fig. 1 is a schematic perspective view of a sleeve assembly for leading cables and / or pipes through a casted partition according to one embodiment,Fig. 2 is a schematic exploded view of the sleeve assembly according to Fig. 1, illustrating a first sleeve, a second sleeve and an optional seal ring of the sleeve assembly,Fig. 3 is a schematic side view of the first sleeve of Fig. 1,Fig. 4 is a schematic side view of the second sleeve of Fig. 1,Fig. 5 is a schematic section view of the sleeve assembly of Fig. 1, wherein the second sleeve is inserted into the first sleeve with the seal ring between them,Fig. 6 is a schematic view of the first sleeve arranged in a gap between a first casting structure and a second casting structure,Fig. 7 is a schematic section view of an installation for leading cables and / or pipes through a casted partition, wherein the first sleeve is casted into the partition and the second sleeve is connected to the first sleeve and projecting from the partition,Fig. 8 is a schematic section view of an installation for leading cables and / or pipes through a casted partition, illustrating the sleeve assembly, the casted partition, a round seal arranged in the first sleeve and a conduit connected to the second sleeve,Fig. 9 is a schematic perspective view of a portion of the first sleeve, illustrating a recess and a groove thereof according to one embodiment, andFig. 10 is a schematic perspective view of a round seal for insertion into the sleeve assembly according to one example.Detailed DescriptionWith reference to Figs. 1 and 2, a sleeve assembly 10 for passing at least one cable and / or at least one pipe through a casted partition is illustrated schematically according to one embodiment. The sleeve assembly 10 is arranged for passing one or more cables and / or pipes through a partition in the form of a wall, a floor, a roof, a ceiling, an intermediate floor or similar. For example, the partition is formed by or includes a setting material, such as concrete or similar materials. For example, the sleeve assembly 10 is arranged for passing cables, 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. Cables and / or pipes are led in an axial direction through the sleeve assembly 10. The sleeve assembly 10 forms an axially extending through opening in the partition.The sleeve assembly 10 comprises a first sleeve 11 and a second sleeve 12. The first sleeve 11 is illustrated in Fig. 3 and the second sleeve 12 is illustrated in Fig. 4. Each of the first and second sleeves 11, 12 has a first end portion and a second end opposite to the first end portion. The sleeves 11, 12 are tubular and has a centre axis A.For example, the sleeves 11, 12 are generally cylindrical with a circular cross section. The second sleeve 12 is inserted into the first sleeve 11 in the axial direction, as can be seen particularly in Fig. 5. Each of the first and second sleeves 11, 12 has a through opening, an exterior surface and an interior surface. However, at least the first sleeve 11 may be provided or formed with an optional removable wall (not illustrated) covering the through opening before installation of one or more cables and / or pipes, wherein said removable wall is removed before leading one or more cables and / or pipes through the sleeve assembly 10. The removable wall may be moulded together with the remaining parts of the first sleeve 11. For example, the first and second sleeves 11, 12 are formed in plastic material. Optionally, a seal ring 13 is provided between the first and second sleeves 11, 12 to form a tight connection between them.The first sleeve 11 is illustrated in Figs. 1-3. The first sleeve 11 is configured to be casted into the partition, which is described more in detail below. In the illustrated embodiment, the first end of the first sleeve 11 is formed with a flange 14. The flange 14 extends in the radial direction. For example, the flange 14 is formed for fastening to a casting structure, which is described more in detail below. For example, the flange 14 is formed with openings 15 for receiving fastening means, such as screws or similar, for fastening of the first sleeve 11 to the casting structure. Said openings 15 are illustrated in Figs. 1 and 2. For example, the flange 14 is non-circular to prevent rotation when casted into the partition. Optionally, the flange 14 comprises locking means 16 for locking the flange 14 to a flange of an adjacent first sleeve. For example, the flange 14 is formed with four circumferential sides, each of said sides comprising locking means 16, such as radially extending locking tabs, for cooperation with corresponding locking means of adjacent sleeves. For example, the locking means 16 are resiliently flexible due to the inherent properties of the material of the first sleeve 11 , so that the locking means 16 can cooperate with corresponding locking means by a snap-lock mechanism.The first sleeve 11 is formed with at least one radially extending protrusion 17 arranged between the first end and the second end of the first sleeve 11. The protrusion 17 is arranged to anchor the first sleeve 11 in the partition and prevent axial displacement thereof, i.e. along the centre axis A. Optionally, the protrusion 17 extends around the entire exterior circumference of the first sleeve 11. For example, reinforcement plates 18 extend between the exterior surface of the first sleeve 11 and at least one radially extending side of the protrusion 17 to reinforce the protrusion 17 and also to prevent rotation of the first sleeve 11 inside the partition.The first sleeve 11 is arranged for receiving the first end of the second sleeve 12. The first end of the second sleeve 12 can be inserted into the second end of the first sleeve 11. When inserted into the first sleeve 11, the second sleeve 12 can be fastened to the first sleeve 11 by a fastening arrangement. Optionally the fastening arrangement can be released again after fastening of the second sleeve 12 to the first sleeve 11. In the illustrated embodiment, the first sleeve 11 is formed with a plurality of axially extending recesses 19, wherein each of the recesses 19 is connected to a circumferentially extending groove 20. The recesses 19 and grooves 20 are illustrated in Fig. 2. Each of the recesses 19 extends from the second end portion of the first sleeve 11. For example, the recesses 19 are formed in a radially extending surface of the second end portion of the first sleeve 11. Optionally, the recesses 19 are open radially inwards and are connected to the through opening of the first sleeve 11 in the radial direction to facilitate moulding of the first sleeve 11. The grooves 20 all extend in the same direction from the recesses 19. A single recess 19 and a single groove 20 form a set. Hence, a single groove 20 is connected to each of the recesses 19. For example one end of the groove 20 is connected to the recess 19, wherein an opposite end of the groove forms a stop. The groove 20 extends circumferentially a distance from the recess 19, such as 10-120 degrees around the circumference depending on the number of recesses 19 and grooves 20 formed in the first sleeve 11. The recesses 19 and grooves 20 are distributed around the inner circumference of the first sleeve 11. For example, the first sleeve 11 comprises at least two sets of recesses 19 and grooves 20, such as at least three or four of such sets. In the illustrated embodiment four of the recesses 19 with the grooves 20 are distributed around the inner circumference of the first sleeve 11 , wherein each of the grooves 20 extends about 45 degrees in the circumferential direction from the recess 19 it is connected to. However, it is understood that another angle could be used, such as an extension of the grooves 20 of from 10 or 20 degrees and up to 60 or 80 degrees when four sets of recesses 19 and grooves 20 are used.In the illustrated embodiment, the first end of the second sleeve 12 is formed with radially extending projections 21. The projections 21 are illustrated in Figs. 2 and 4. The projections 21 are distributed around the outer circumference of the first end of the second sleeve 12. The projections 20 are arranged to be inserted into the recesses 19 and the grooves 20 of the first sleeve 11 for fastening of the second sleeve 12 to the first sleeve 19. Hence, each of the recesses 19 is arranged for receiving one of the projections 21, so that the projections 21 can be inserted into the recesses 19 in the axial direction and rotated into the grooves 20 for fastening of the second sleeve 12 to the first sleeve 11. The second sleeve 12 can be rotated around the centre axis A corresponding to the extension of the grooves 20.Optionally, the first and second sleeves 11, 12 are formed with radially extending tabs 22, 23 with a hole for receiving a fastening screw or similar mechanical fastener to secure the second sleeve 12 to the first sleeve 11. For example, the tabs 22, 23 of the first and second sleeves 11, 12 and the holes of said tabs 22, 23 overlap each other when the projections 21 have been inserted into the recesses 19 and rotated to the end of the grooves 20.The second sleeve 12 comprises one or more radially extending fastening elements 24 for fastening of a conduit to the second sleeve 12. Said fastening elements 24 are, e.g. arranged on the interior surface of the second sleeve 12 and optionally between the first and second ends of the second sleeve 12. The fastening element(s) 24 is described more in detail below.In the illustrated embodiment, the first end portion of the second sleeve 12 is formed with a diameter that is smaller than a diameter at the second end portion and a central portion thereof, forming a radially extending part between the first end portion and the central portion of the second sleeve 12. The second end portion of the second sleeve 12 is flared, so that the diameter of the second end portion is bigger than the diameter of the central portion of the second sleeve 12. With reference particularly to Fig. 5 the seal ring 13 is arranged between said radially extending part of the second sleeve 12 and a corresponding surface of the first sleeve 11. For example, the seal ring 13 is arranged in a groove of one or both of the first and second sleeves 11, 12.With reference to Fig. 6 the first sleeve 11 is arranged between a first casting structure 25 and a second casting structure 26. The casting structures 25, 26 are arranged for forming the partition between them. Hence, the first casting structure 25 is arranged with a gap 27 to the second casting structure 26, wherein the first sleeve 11 is arranged in said gap 27. The first end portion of the first sleeve 11 is arranged in contact with the first casting structure 25. For example, the flange 14 of the first sleeve 11 is fastened to the first casting structure 25, such as an inner surface of the first casting structure 25 facing an inner surface of the second casting structure 26. The second end portion of the first sleeve 11 is arranged in contact with the second casting structure 26 in a corresponding manner. Hence, the first sleeve 11 extends from the first casting structure 25 to the second casting structure 26, such as from the inner surface of the first casting structure to the inner surface of the second casting structure. Then, a setting material, such as concrete, is poured into the gap 27 where it surrounds the exterior surface of the first sleeve 11. Then, the setting material solidifies and forms the partition. The casting structures 25, 26 are then removed and the first sleeve 11 is casted into the partition 28. The first sleeve 11 casted into the partition 28 is illustrated in Fig. 7. The first sleeve 11 forms a through opening through the partition 28. Optionally a removable cover (not illustrated) is covering the through opening of the first sleeve 11, such as until cables or pipes are lead through the first sleeve 11. The partition 28 has a first face and an opposite second face. The first sleeve 11 extends from the first face to the second face of the partition 28. For example, the first end portion of the first sleeve is flush with the first face of the partition 28, wherein the second end portion of the first sleeve 11 is flush with the second face of the partition 28. In Fig. 7, the second sleeve 12 is connected to the first sleeve 11 and projects from the partition 28. The second sleeve 12 is connected to the first sleeve 11 after the first sleeve 11 has been casted into the partition 28. The second sleeve 11 is inserted into the second end of the first sleeve 1 1 in the axial direction and is fastened to the first sleeve 11. For example, the second sleeve 12 is fastened to the first sleeve 11 by inserting the projections 21 of the second sleeve 12 into the recesses 19 of the first sleeve 11 in the axial direction followed by rotating the projections 21 of the second sleeve 12 into the grooves 20 of the first sleeve With reference also to Fig. 8 a conduit 29 has been inserted into the second end portion of the second sleeve 12 in the axial direction. The conduit 29 is, e.g. a corrugated conduit, wherein one or more of exterior corrugations of the conduit 29 receives the fastening element 24 for fastening of the conduit 29 to the second sleeve 12. The conduit 29 can be inserted into the second sleeve 12 before or after the second sleeve 12 has been connected to the first sleeve 11. For example, the conduit 29 is a conventional conduit.In the embodiment of Fig. 8, a round seal 30 has been arranged in the first sleeve 11. The round seal 30 is arranged for tightening around the cable or pipe. The round seal 30 comprises a cylindrical compressible body 31, at least one front fitting 32, at least one rear fitting 33 and a plurality of fastening elements 34 going through holes of the compressible body 31 in the axial direction and connecting the front and rear fittings 32, 33 for compressing the compressible body 31 around the one or more cables and / or pipes arranged therein. Hence, the round seal 30 forms a through opening for the one or more cables or pipes. Optionally, the compressible body 31 is provided with peelable sheets 35 for adapting a diameter of the through opening of the compressible body 31 to a diameter of the one or more cables or pipes arranged in the through opening. For example, the peelable sheets 35 are conventional. For example, the round seal 30 is a conventional round seal. For example, the round seal 30 is for leading a single cable or a single pipe through the first sleeve 11. Alternatively, the round seal 30 is arranged for leading a plurality of cables and / or pipes through the first sleeve 11. Such an alternative round seal 30 is illustrated in Fig. 10, wherein the round seal 30 has a rectangular through opening for receiving one or more modules 36. Each of said modules 36 are arranged for leading a cable or pipe through the round seal 30.Optionally, each of said modules 36 comprises peelable sheets 35 for adapting the diameter to the cable or pipe. For example, the modules 36 are conventional.With reference to Fig. 9 a portion of the first sleeve 11 is illustrated schematically, wherein the recess 19 and the groove 20 are illustrated more in detail according to one embodiment. The recess 19 extends in the axial direction from the second end of the first sleeve 11 for receiving the projections 21 of the second sleeve 12. In the embodiment of Fig. 9 the groove 20 is arranged with an angle, so that the second sleeve 12 is forced against the second sleeve 12 when the projections 21 are rotated into the grooves 20. For example, the groove 20 has an inner surface and an outer surface in the axial direction, wherein at least the outer surface is inclined in the circumferential direction for displacing the second sleeve 12 in the axial direction toward the first sleeve 11 when the projections 21 are rotated into the grooves 20. For example, the seal ring 13 is compressed when the projections 21 are rotated into the grooves 20 to provide a tight connection between the first and second sleeves 11, 12.

Claims

1. Installation comprising a molded partition (28) and a sleeve arrangement (10) for routing one or more cables and / or pipes through said partition (28), the partition (28) having a first surface and an opposing second surface, the sleeve arrangement (10) having an axis (A), being arranged to form an axially extending passage in the partition (28) and comprising at least a first sleeve (11) and a second sleeve (12), each of the sleeves (11, 12) having a first end portion and an opposing second end portion, and the second end portion of the first sleeve (11) receiving a first end portion of the second sleeve (12),characterized bythe first sleeve (11) is molded into the partition,the first end portion of the second sleeve (12) is inserted into the second end portion of the first sleeve (11) and projects from the partition wall (28),the second sleeve (12) includes one or more radially extending fastening elements (24) for fastening a lead (29) to the second sleeve (12), andthat the installation further comprises a round seal (30) for sealing around the one or more cables and / or pipes, said round seal (30) being arranged inside the first sleeve (11), said round seal (30) comprising a cylindrical compressible body (31), at least one front fitting (32), at least one rear fitting (33) and a plurality of fastening elements (34) passing through holes in the compressible body (31) in the axial direction and connecting the front and rear fittings (32, 33) to compress the compressible body (31) around the one or more cables and / or pipes.

2. Installation according to claim 1, wherein said fastening elements (24) are arranged on an inner circumferential surface of the second sleeve (12).

3. Installation according to any preceding claim, comprising said conduit (29) connected to the second sleeve (12) and projecting from the partition (28).

4. Installation according to any preceding claim, wherein the first end portion of the first sleeve (11) is flush with the first surface of the partition wall (28) and wherein the second end portion of the first sleeve (11) is arranged flush with the second surface of the partition wall (28).

5. An installation according to any preceding claim, wherein the second sleeve (12) is formed with a plurality of radially extending projections (21) and the first sleeve (11) is formed with a plurality of axially extending recesses (19), each of the recesses (19) being arranged to receive one of the projections (21), and each of the recesses (19) being connected to a circumferentially extending groove (20), such that the projections (21) can be inserted into the recesses (19) in the axial direction and rotated into the grooves (20) to secure the second sleeve (12) to the first sleeve (11).

6. Installation according to claim 5, wherein the grooves (20) are formed with a stop in the circumferential direction.

7. An installation according to claim 5 or 6, wherein the grooves (20) have opposing surfaces, at least one of said surfaces being inclined in the circumferential direction to displace the second sleeve (12) in the axial direction towards the first sleeve (11) when the projections (21) are rotated into the grooves (20).

8. Installation according to any one of the preceding claims, wherein the sleeve arrangement (10) comprises a sealing ring (13) arranged between the first sleeve (11) and the second sleeve (12).

9. Method for providing an installation for routing one or more cables and / or pipes through a cast partition (28), comprising the steps ofa) providing first and second molding structures (25, 26) for molding the partition (28) and forming a first surface and an opposing second surface of the partition (28),b) arranging a first sleeve (11) between the first and second casting structures (25, 26), wherein a first end portion of the first sleeve (11) is connected to the first casting structure (25) and a second end portion of the first sleeve (11) is connected to the second casting structure (26),c) pouring a setting material between the first and second casting structures (25, 26) and around a circumferentially extending outer surface of the first sleeve (11),d) removing the first and second casting structures (25, 26),e) after step d), inserting a first end portion of a second sleeve (12) into the second end portion of the first sleeve (11), so that the second sleeve (12) protrudes from the second surface of the partition wall (28),f) connecting a conduit (29) to one or more radially extending fastening elements (24) of the second sleeve (12),g) providing a round seal (30) for sealing around the one or more cables and / or pipes inside the first sleeve (11), said round seal (30) comprising a cylindrical compressible body (31), at least one front fitting (32), at least one rear fitting (33) and a plurality of fastening elements (34) passing through holes in the compressible body (31) in the axial direction and connecting the front and rear fittings (32, 33), andh) by operating the fastening elements (34) compress the compressible body (31) around the one or more cables and / or pipes.

10. A method according to claim 9, comprising the step of inserting the lead (29) into the second sleeve (12).

11. Method according to any one of claims 9 or 10, comprising the steps of:inserting radially extending projections (21) of the second sleeve (12) in an axial direction into axially extending recesses (19) of the first sleeve (11), androtating said projections (21) into circumferentially extending grooves (20) connected to the recesses (19) to secure the second sleeve (12) to the first sleeve (11).

12. Use of a sleeve assembly (10) for routing one or more cables and / or pipes through a molded partition (28), the partition (28) having a first surface and an opposing second surface, the sleeve assembly (10) forming an axially extending passage in the partition (28) and comprising at least one first sleeve (11) and a second sleeve (12), each of the sleeves (11, 12) having a first end portion and an opposing second end portion, the second end portion of the first sleeve (11) receiving a first end portion of the second sleeve (12), the first sleeve (11) being molded into the partition (28), the first end portion of the second sleeve (12) being inserted into the second end portion of the first sleeve (11), the second sleeve (12) comprises one or more radially extending fastening elements (24) for fastening a conduit (29) to the second sleeve (12), wherein a round seal (30) is arranged to seal around the one or more cables and / or pipes inside the first sleeve (11), wherein said round seal (30) comprises a cylindrical compressible body (31), at least one front fitting (32), at least one rear fitting (33) and a plurality of fastening elements (34) passing through holes in the compressible body (31) in the axial direction and connecting the front and rear fittings (32, 33) and wherein the fastening elements (34) compress the compressible body (31) around the one or more cables and / or pipes.