WO2002044603A1

WO2002044603A1 - Device for sealing an internally and externally defined annular chamber

Info

Publication number: WO2002044603A1
Application number: PCT/EP2001/012913
Authority: WO
Inventors: Bernd Skerra
Original assignee: Pipeline Seal And Insulator, Inc.
Priority date: 2000-11-25
Filing date: 2001-11-08
Publication date: 2002-06-06

Abstract

A device (10) for sealing an annular chamber (11), defined by at least one inner and one outer body (12, 13), is provided with several multi-piece sealing elements (14), running around the circumference of the annular chamber (11) and filling said circumference of the annular chamber, with pressure elements (19, 20), running on the axial external faces of the sealing elements (14), lying axially adjacent to each other in relation to the annular chamber and with tensioning means (16), co-operating with the pressure elements (19, 20), extending axially through said pressure elements and the sealing elements (14), in order to axially press together and radially extend the sealing element(s) (14). In order that the above device is suitable for application in fire-proofing or prepared for such an application, one or several fire-proof modules (30), comprising material which foams at high temperature, are fitted to one or both end-faces thereof.

Description

Device for sealing an annular space delimited by an inner and an outer body

Inspection

The present invention relates to a device for sealing a, for example, ring-like space delimited by at least one inner and an outer body, in particular for sealing pipes, cables, ducts or the like against protective pipes, wall openings or the like, according to the preamble of Claim 1.

Such so-called annular seals are both in the form of compact seals and in the form of

Link chain seals known. A type of the latter type is known from DE 196 01 288 C2.

The object of the present invention is to provide a device for sealing a ring-like space of the type mentioned at the beginning, which is delimited by at least one inner and one outer body, and which is also suitable for fire protection use or can be upgraded.

To achieve this object, the features specified in claim 1 are provided in a device for sealing a ring-like space of the type mentioned, which is delimited by at least one inner and one outer body.

The measures according to the invention enable that in the event of a fire in which the sealing elements burn away, a sealing effect against the penetration of fire and smoke by the fire protection module or modules is achieved. Even if, when using plastic pipes within the bushing, they burn away, you can by selecting the order of magnitude or the fire protection modules ensure that the entire wall duct can be closed fire-proof.

When using the sealing device in areas that are at risk of fire from both sides, it is advantageous to provide the features of claim 2.

Depending on the size of the space to be sealed by the fire protection module (s) in the event of a fire, it is expedient to provide the features according to claim 3 and / or claim 4. In the combined case, the features according to claim 5 are to be additionally provided.

With the features according to claim 6 it is achieved that the foaming material of the fire protection module does not spread away from the sealing elements in the event of fire, but rather forms a solid ring between the sealing elements and the pressure elements on the one hand and the carrier plate or plates. A preferred mounting of the fire protection module on the carrier plate results from the features according to claim 7.

With the features according to claim 8 and / or 11 it is achieved that, when the distance is set in the desired manner, the foaming material reliably fills the relevant annular space. The thickness of the fire protection module can be variably adjusted.

The fire protection module can be held close to or in front of the facing end face of the sealing elements in a variety of ways. For this purpose, the features according to claims 9 and 12 are preferably provided, which contributes to simple and safe installation. The fire protection module can, for example, be held on the threaded bolt between two nuts. However, the features according to claim 10 are preferred provided, which has the advantage that when tightening the clamping means and consequently clamping the sealing elements in the annular space, the once set distance of the fire protection module from the relevant end face or the pressure elements is essentially retained.

Further details of the invention can be found in the following description, in which the invention is described and explained in more detail with reference to the exemplary embodiments illustrated in the drawing. Show it:

Figure 1 in a schematic longitudinal section

Device for sealing an annular space delimited by an inner and an outer body according to preferred exemplary embodiments of the present invention,

FIG. 2 shows an enlarged rear view according to section II of FIG. 1,

FIG. 3 shows a side view according to arrow III of FIG. 2 according to a first exemplary embodiment,

FIG. 4A in an enlarged representation, a section along and 4B line IV-IV of FIG. 2 in the assembled state or in the state of the individual parts

Figure 5 is a representation corresponding to Figure 3, but according to a second embodiment.

According to FIG. 1, the sealing device 10 shown serves to seal an annular space 11 delimited by an inner and an outer body 12 or 13. The annular space 11 can be formed by a wide variety of bodies, for example on the outside by a wall opening, a Core hole, a protective tube or the like. And inside through pipes, cables, channels or the like. As they are used to carry gas, water, oil or electricity.

In the embodiment shown in Figure 1, the sealing device 10 is designed as a so-called link chain seal. It has ring segments 14 extending over the circumference of the annular space 11, which are made of an elastic material and in the same way and whose geometry is essentially the same. Depending on the circumference of the annular space 11, two or more, preferably a plurality of ring segments 14 can be provided. Adjacent ring segments are connected to one another by a clamping means 16 to form a rotating chain. Between the ring segments 14 and the clamping means 16 along both end faces 17, 18 of the ring segments 14 pressure elements 19, 20 are provided, by means of which the ring segments 14 are compressed in the axial direction with the aid of the clamping means 16. As a result, the ring segments 14 deflect elastically in the radial direction both to the inner body 12 and to the outer body 13, so that the annular space 11 is sealed off from the axially adjacent spaces. The annular space 11 can be designed in the form of a ring or in some other way.

In the exemplary embodiment shown, two one-piece ring segments 14, 14 'are provided axially adjacent to each 30 ° circular ring segment, for example, each ring segment 14, 14' being approximately Z-shaped in this view. The area 21 or 22, which projects on the circumferential side of the one or the other circumferentially adjacent ring segment 14 or 14 ', is provided with a through-bore 23, through which the clamping means 16 penetrate. In this way, circumferentially adjacent ring segments 14, 14 'engage axially next to one another in the area of the clamping means 16. The adjacent end faces of the ring segments 14, 14 'are circumferential on one another matching convex and concave curvatures. As a result, adjacent ring segments 14, 14 'are movable around the clamping means 16 in the circumferential direction and can thus be adapted to the relevant diameter. It goes without saying that the ring segments 14, 14 'can each also be in two parts, so that each part is then rectangular in the view in FIG. 3. As indicated in FIG. 3, each ring segment 14, 14 'is provided with an axially continuous or, as here, blind bore between its circumferential ends, into which a thrust washer 26 with its indicated axial shoulder 27 can be inserted. When the or the ring segments 14, 14 'are axially compressed with the aid of the clamping means 16, each elongate plate-shaped pressure element 19, 20 acts on two pressure disks 26 of two adjacent ring segments 14, 14' or pairs of ring segments. The adjacent ring segments 14 and 14 'can also be replaced by a Z-shaped ring segment.

The sealing device 10 also has a plurality of fire protection modules 30, each of which is held on a clamping means 16. In the exemplary embodiment, a number of fire protection modules 30 corresponding to the number of clamping devices 16 is thus provided. It goes without saying that fewer or more can also be provided. Each fire protection module is approximately oblong in shape, similar to the base area of the pressure plates 19, 20, and essentially made of a material that can withstand high temperatures, for example temperatures of more than 170 ° C. , foams and thereby increases its volume by a multiple, for example 7.5 times. Part of this foaming material of the fire protection module 30 is, for example, expanded graphite. The fire protection module 30 is held on a carrier plate 31 according to FIG. 4A. The elongate rectangular support plate 31 has clamp webs 32 which can be bent on the longitudinal end in the direction of the arrows A (FIG. 4B) and which grip and hold the fire protection module 30. It is also possible that Glue the fire protection module to the carrier plate and dispense with the clip webs 32. The extent of the fire protection module 30 and the carrier plate 31 in the circumferential direction corresponds approximately to that of the plate-shaped pressure element 19 or 20; the same applies to the width expansion in the radial direction of the annular space 11.

The clamping means 16 has a threaded bolt 37 provided with a head 36, onto which the pressure element 19 is attached, facing the head 36, while the plate-shaped pressure element 20 is screwed or screwed onto the free end of the threaded bolt 37 via its internal threaded bore. The free end of the threaded bolt 37 projects above the plate-shaped pressure element 20 and carries in a screwed-on manner the fire protection module 30 held on the support plate 31. For this purpose, the support plate 31 has an indentation 33 in the center, which is provided with an internal thread and into a bore 34 of the module 30 intervenes. The internal thread feed 33 is screwed onto the end of the threaded bolt 37 in such a way that the fire protection module 30 points to the pressure element 20 and is at a certain distance from it. In order to avoid unintentionally unscrewing the carrier plate 31 or the fire protection module 30 when tensioning the clamping means 16 or the sealing device 10, the end of the threaded bolt 37 is deformed after the fire protection module 30 has been screwed on. The thickness (in the axial direction of the ring segment 14 and / or length of the fire protection module 30 is dependent on the space to be filled in the event of a fire by the foaming material of the fire protection module 30.

In the exemplary embodiment of the present invention shown in FIG. 5, not only the end face 17 of the ring segment (s) 14 or one or more fire protection modules 30 but also the end face 18 of the ring segment (s) 14 'are arranged opposite one or more fire protection modules 30' and 30 held on the sealing device 10. The fire protection module 30 'or the fire protection module 30 located opposite the end face 18 is preferably attached to each pressure plate 26', which are each provided between two pressure elements 19. The thrust washer 26 'has an axial ^" shoulder 27', which is introduced into a correspondingly shaped blind hole (42) of the pressure element 14 'via a front ring widening 41. The thrust washer 26' and its shoulder 27 'have an axial internally threaded bore 43, in which can be screwed into the external thread end of a stud bolt 44. At the other end of the stud bolt 44, the fire protection module 30 'is held at a distance from the end face 18 of the ring segment 14'. The end of the stud bolt 44 facing away from the thrust washer 26 'has a ring stop 45 and an additional one upright external thread end 46, onto which a nut 47 can be screwed, between which and the support plate of the fire protection module 30 'is held or clamped between the ring stop 46. The free end of the stud bolt is provided with a tool holder, for example a screwdriver slot, in order to insert it the

Screw in the internal threaded bore of the thrust washer 26 or the shoulder 27 '.

It goes without saying that the fire protection module 30 ′ is designed in accordance with the fire protection module 30 and has corresponding dimensions. In addition, the fire protection module 30 'and the fire protection module 30 can be interchanged in the corresponding applications.

For use for fire protection purposes, the clamping means 16, consisting of threaded bolt 37, head 36 and pressure elements 19, 20, as well as thrust washer 26 and stud bolt 44 are made of galvanized steel or stainless steel. The ring segments 14, 14 'are made of a specific silicone rubber, which does not accumulate in the event of fire as powder ash but as a ceramicizing glow residue. If the sealing device 10 has also been described as a link chain seal, it goes without saying that the measures according to the invention of the fire protection module 30 or 30 'can also be provided for a compact seal.

Furthermore, the measures according to the invention can also be used with sealing devices which seal a plurality of annular spaces lying next to one another and, if appropriate, a circumferential annular space surrounding them.

Claims

claims

1. Device (10) for sealing one of at least one inner and one outer body (12, 13) limited, for example. Ring-like space (11), in particular for sealing pipes, cables, channels or the like against protective pipes, wall openings or the like ., With one or more, one-part or multi-part, sealing element (s) (14) extending over the circumference of the annular space (11) and filling, for example, the annular space on the circumference, with on the axially outer end faces of the sealing element or axially in Relative to the annular space adjacent sealing elements (14) extending pressure elements (19, 20) and interacting with the pressure elements (19, 20) and this and the sealing element (s) (14) axially penetrating clamping means (16) for axial compression and radial Widening of the sealing element or elements (14), characterized in that at least one at one end foaming at high temperature it has material-containing fire protection module (30).

2. Device according to claim 1, characterized. characterized in that at least one fire protection module (30) is held at both ends.

3. Device according to claim 1 or 2, characterized in that each clamping means (16) is assigned a fire protection module (30).

4. Device in which a pressure plate (26) is provided between two pressure elements (19, 20), according to claim 1 or 2, characterized in that each pressure plate (26) is assigned a fire protection module (30 ').

5. Device according to claims 2 to 4, characterized in that at one end face fire protection modules (30) on the clamping means (16) and at the other end face fire protection modules (30 ') are held on the pressure plates (26).

6. The device according to at least one of the preceding claims, characterized in that the fire protection module (30) is held on a carrier plate (31) which on the end (17, 18) of the sealing element (14) facing away from the relevant front end (17) of the fire protection module ( 30) is provided.

7. The device according to claim 6, characterized in that the fire protection module (30) is clamped or glued to the carrier plate (31).

8. The device according to at least one of the preceding claims, characterized in that the fire protection module (30) is arranged at a distance from the facing pressure element (19, 20).

9. The device according to at least one of claims 1 to 3 or 5 to 8, characterized in that the clamping means (16) has a threaded bolt (37) on whose one free end the fire protection module (30) is held.

10. The device according to claim 9, characterized in that the carrier plate (31) is provided with an internal thread feed (33) and the fire protection module (30) with a through hole which receives the internal thread feed (33).

11. The device according to at least one of claims 1 to 7, characterized in that the fire protection module (30 ') is arranged at a distance from the facing thrust washer (26).

12. The device according to claim 11, characterized in that the thrust washer (26) in an axial projection (27) has an internally threaded bore for receiving a stud bolt, at the other end of which the fire protection module (30 ') is received.