SE1950264A1

SE1950264A1 - Transit for a pipe

Info

Publication number: SE1950264A1
Application number: SE1950264A
Authority: SE
Inventors: Pierre Berglund; Robert Gustavsson
Original assignee: Roxtec Ab
Priority date: 2019-03-01
Filing date: 2019-03-01
Publication date: 2020-09-02
Also published as: WO2020180228A1

Abstract

A transit for a pipe (1) through an opening in a partition (2). The transition comprises a sealing means having a through opening receiving the pipe (1). Insulation (5, 13, 17) is placed between the pipe (1) and the sealing means.

Description

TRANSIT FOR A PIPE Technical FieldThe present invention concerns a sealed transit for a pipe through a partition.

Especially for a pipe containing a cold ﬂuid. m For passing a pipe through an opening of a wall, a roof, a top, a ﬂoor, a bottomof a house, a ship, an electrical cabinet, a container etc., it is often a need to have somekind of sealing. The wall, roof, top, floor and bottom could be expressed as any dividingstructure or partition. To simplify, the term “partition” will mainly be used in thisdescription as a general term for the different parts through which the pipe should go.

As used in this description the terms “axial”, “radial” and corresponding termsare in view of a pipe going through the opening of the partition.

One type of seal often used in a pipe or cable transit or transition has a generalcylindrical form and is to be received in a sleeve in a partition or directly in an openingof a partition. The seal has a cylindrical compressible body, which is compressed axiallybetween fittings at opposite ends of the compressible body. By the axial compressionthe cylindrical body will expand radially both inwards and outwards. The compressiblebody has a central through opening for receiving a cable or pipe.

Another mode of sealing according to prior art is to arrange one or morecompressible modules inside a cylindrical or rectangular frame. Each module is toreceive a cable or pipe in a central through opening.

The cylindrical frame receiving a number of modules has a cylindricalcompressible body. The cylindrical compressible body is compressed axially betweenfittings at opposite ends of the compressible body. The compressible body has a centralthrough opening, norrnally having a rectangular form, for receiving a number ofcompressible modules. The cylindrical frame is received in a sleeve in a partition ordirectly in an opening of the partition.

For transits having modules received inside a rectangular frame, therectangular frame is fixed in the opening of the partition. The modules norrnally have arectangular cross section. Inside the rectangular frame also some kind of compression unit is arranged. The compression unit is placed between the rectangular frame and the modules inside the rectangular frame in such a way that when the compression unit isexpanded the compressible modules will be compressed around the pipes or cables.

The parts receiving a single pipe etc. as discussed above often have a numberof peelable layers or sheets on the inside. Said layers are peeled off until the innerdiameter of the part is adapted to the outer diameter of the pipe etc. received in saidpart.

Pipes, especially metal pipes, having a ﬂow of cold ﬂuid, may experiencecondensation problems. For pipes passing a partition it is common to have a seal placedinside a sleeve. If a seal is used in a transition the sleeve will be chilled andcondensation will be formed. This will give risk of mould forrning.

For pipes having a ﬂow of hot ﬂuid there is a risk that the temperature of apossible seal will be too high. A high temperature may affect the material of the seal,such as a rubber material.

One prior art example of solving the problem with condensation is to pull theinsulation of the pipe on to the outside of the seal.

Another prior art example is to arrange a separate insulation on the outside of the seal, to reduce chilling of the sleeve.

Summa To reduce the risk of mould forrning one object of the present invention is tocreate a temperature barrier between a pipe for cold ﬂuid and a seal. Even though theinvention has been developed in view of pipes having cold ﬂow, it will also have afunction in view of pipes for hot ﬂuids. Thus, in case of a pipe for hot ﬂuid, creating atemperature barrier between the pipe and a seal will reduce the risk of affecting thematerial of the seal in a negative way.

The above object is achieved with a transit according to claim l. Thedependent claims specify further features of the transit.

Further objects and advantages of the present invention will be obvious to aperson skilled in the art when reading the detailed description below of different embodiments.

Brief Description of the DrawingsThe present invention will be described below by way of example and with reference to the enclosed drawings. In the drawings: Fig. 1 is a scheniatic perspective view of one en1bodin1ent of a transit for a pipethrough a partition, Fig. 2 is a perspective view of one en1bodin1ent of a cylindrical seal that can beused in the transit of Fig. 1, Fig. 3 is a scheniatic perspective view of one en1bodin1ent of a transit for a pipethrough a partition, Fig. 4 is a scheniatic perspective view of one en1bodin1ent of a transit for a pipethrough a partition, Fig. 5 is a scheniatic perspective view of a con1pressib1e body of a seal half in apreparation state, which con1pressib1e body can be used in a transit for a pipe through apartition, Fig. 6 is a scheniatic perspective view of the con1pressib1e body of Fig. 5 in astate ready for n1ounting, Fig. 7 is a perspective view of a module that can be received in different typesof transits, Fig. 8 is a perspective view of a cylindrical franie receiving niodules as shownin Fig. 7, and Fig. 9 is a perspective view of a rectangular franie receiving niodules as shown in Fig. 7.

Detailed Description ofEn1bodin1ents The terrn “sealing means” will be used in this description for any part designedto receive a pipe in a sealed way. The “sealing means” can for instance be a cylindricalseal or a niodule having a rectangular cross section.

In the example of Fig. 1 a pipe 1 for cold ﬂuid or hot ﬂuid, passes through apartition 2. The ﬂuid n1ay be gas or liquid. The pipe 1 goes through a sleeve 3 fixed in athrough opening of the partition 2. To seal the pipe 1 inside the sleeve 3, the pipe 1 isalso arranged to go through a sealing n1eans placed inside the sleeve 3. Further,insulation 5 is placed between the pipe 1 and an inner surface of the sealing n1eans.

In one en1bodin1ent the insulation 5 is fastened on the outside of the pipe. Inanother en1bodin1ent the insulation 5 is fastened to the inside of the sealing n1eans. Theinsulation norrnally extends the entire axial length of the sealing n1eans.

In one en1bodin1ent the sealing n1eans is a cylindrical seal 4 forrned of twohalves. The cylindrical seal 4 con1prises a con1pressib1e body 6, a first fitting 7 and a second ﬁtting 8. The first and second fittings 7, 8 are placed at opposite ends of the compressible body 6. Screws 9 are provided to move the first and second fittings 7, 8towards each other in order to compress the compressible body 6. The compressiblebody 6 has an axial through opening. A number of peelable layers 10 are placed on theinside of the through opening of the cylindrical seal 4. Said layers 10 are peeled off toadapt the inner diameter of the through opening to the outer diameter of the pipe 1, to bereceived inside the cylindrical seal 4. In other embodiments the cylindrical seal has nopeelable layers, whereby the through opening has a fixed inner diameter.

In the schematic Figs. 1 and 3-6 only the compressible body 6 of thecylindrical seal 4 is shown.

In some embodiments the cylindrical seal 4 is placed directly in a throughopening of a partition, especially if the partition is relatively thick. Thus, in such a casethere is no sleeve.

In the example of Fig. 3, a shrink tube 11 is placed over the cylindrical seal 4.Opposite ends of the shrink tube 11 are fastened to the pipe 1 on opposite sides of thecylindrical seal 4. The shrink tube 11 is used if the transit needs to be gas tight or watertight. In an altemative embodiment, see Fig. 4, a shrink tube 12 is mounted outside theinsulation 5 inside the axial through opening of the cylindrical seal 4.

When the cylindrical seal 4 has peelable layers 10, insulation 13 can be placedaround each half of the cylindrical seal 4, as indicated in Figs. 5 and 6. In said figures, acompressible body 14 of a seal half is shown. The insulation 13 extends the entirelength of the cylindrical seal 4. The compressible body 14 has a semi-cylindrical recess15. The through opening of the seal 14 is formed when two seal halves are placed ontop of each other with the semi-cylindrical recesses 15 facing each other. In use theappropriate number of layers 10 are first peeled off, if the seal has peelabe layers, withthe insulation 13 lifted as indicated in Fig. 5. Then the insulation 13 is placed aroundeach half, including inside the semi-cylindrical recess 15, as indicated in Fig. 6. Theseal may then be placed on the pipe 1.

It is possible to have insulation going around each half of a sealing means evenif the sealing means have no peelable layers.

In some transits, the pipe 1 is received inside a sealing means in the form of acompressible module 16. Each module 16 has a through opening for receiving the pipe1 and an insulation 17 and peelable layers 18 inside the through opening. In use thediameter of the through opening is adapted to the outer diameter of the pipe 1 to be received by peeling off an appropriate number of layers 18. Then the insulation 17 is placed inside the through opening of the module 16. The module 16 is formed of twohalves, to facilitate placement on the pipe 1.

A number of modules 16 may be placed inside a cylindrical frame 19 or arectangular frame 22, as is well known to a person skilled in the art.

The cylindrical frame 19 has a compressible body having a central throughopening for receiving one or more modules 16. The cylindrical frame 19 has fittings 20on opposite sides of the compressible body. The fittings 20 are only visible on one sidein Fig. 8. The cylindrical frame 19 is to be placed in a sleeve fastened in an opening of apartition or directly in an opening of a partition. By means of screws and nuts 21 thefittings may be moved towards each other, whereby the compressible body of thecylindrical frame 19 is compressed in axial direction. By the compression in axialdirection, the compressible body will expand in radial direction inwards and outwards.By said expansion of the compressible body inwards the modules 16 will be compressedand seal against any pipe 1 received inside a module 16. The cylindrical frame 19 willbe held in the sleeve or in the opening of the partition by means of the radial expansionoutwards of the compressible body.

The rectangular frame 22 is fastened in an opening of a partition, by means ofwelding or the like. The modules 16 are placed inside the rectangular frame 22 togetherwith stay plates 23 and a compression unit (not shown). The stay plates 23 are placedbetween rows of modules 16 and are designed to keep the modules 16 inside therectangular frame 22. By means of the compression unit the modules 16 are compressedinwards around any pipe 2 received inside the modules and outwards against the rectangular frame 22.

Claims

1. A transit for a pipe (1) through an opening in a partition (2), wherein thetransit comprises a sea1ing means having a through opening receiving the pipe (1),characterized in that insu1ation (5, 13, 17) is p1aced between the pipe (1) and thesea1ing means.

2. The transit of c1aim 1, wherein the insu1ation (5) is fastened on the outside ofthe pipe (1).

3. The transit of c1aim 1, wherein the insulation (5, 17) is fastened on the insideof the through opening of the sea1ing means.

4. The transit of c1aim 1, wherein the insu1ation (13) is placed around each oftwo ha1ves of the sea1ing means.

5. The transit of any of the previous c1aims, wherein the insu1ation (5, 13, 17)extends the entire axia1 1ength of the sea1ing means.

6. The transit of any of the previous c1aims, wherein a number of pee1ab1e1ayers (10, 18) are p1aced in the through opening of the sea1ing means.

7. The transit of any of the previous c1aims, wherein the through opening of thesea1ing means is formed in that two ha1ves of the sea1ing means, each having a semi-cy1indrica1 recess (15), are p1aced on top of each other with the semi-cy1indrica1recesses (15) facing each other.

8. The transit of any of the previous c1aims, wherein a shrink tube (11) isp1aced over the sea1ing means and wherein the shrink tube (11) is fastened to the pipe(1) on opposite sides of the sea1ing means.

9. The transit of any of the c1aims 1-7, wherein a shrink tube (12) is placedbetween the sea1ing means and the insu1ation (5) and wherein the shrink tube (12) isfastened to the pipe (1) on opposite sides of the sea1ing means.

10. The transit of any of the previous c1aims, wherein the sea1ing means is acy1indrica1 sea1 (4).

11. The transit of any of the c1aims 1-9, wherein the sea1ing means is a module(16) having a rectangular cross section.

12. The transit of c1aim 10, wherein one or more modu1es (16) are receivedinside a cy1indrica1 frame (19) or a rectangular frame (22).

13. The transit of c1aim 10 or 12, wherein the cy1indrica1 sea1 (4) or thecy1indrica1 frame (19) is received in a s1eeve (3) fixed in an opening of the partition (2).

14. The transit of c1aim 10 or 12, wherein the cy1indrica1 sea1 (4) or thecy1indrica1 frame (19) is received directly in a through opening of the partition (2).

15. The transit of c1aim 12, Wherein one or more modules (16) are p1acedinside the rectangular frame (22), being a part of the transit, together With at least onecompression unit and Wherein the rectangular frame is fastened in the opening of thepartition (2).