GB2388174A

GB2388174A - A fire protection sleeve

Info

Publication number: GB2388174A
Application number: GB0306879A
Authority: GB
Inventors: Herbert Muezenberger
Original assignee: Hilti AG
Current assignee: Hilti AG
Priority date: 2002-04-18
Filing date: 2003-03-25
Publication date: 2003-11-05
Anticipated expiration: 2023-03-25
Also published as: JP4362039B2; ITMI20030654A1; CN1451825A; GB2388174B; JP2003336331A; AU2003201317B2; CN1278002C; GB0306879D0; AU2003201317A1; DE10217174A1

Abstract

A fire protection sleeve (1) comprising a shell part (4) which has a plurality of openings (7), which can be placed round the periphery of a pipeline (3) and which can be closed, and on the inner shell face of which an intumescent fire protection material (2) is disposed, and comprising at least one removably associated, separate, angled wall hook (5) for mounting on a wall (6), which wall hook can be fixed radially outwardly on the shell part (5), characterised in that the wall hook (5) forms at least one anchoring means (8) which radially penetrates at least one opening (7) in the shell part (4) and which ends radially outwardly of the pipeline (3), and which can be anchored with a self-locking effect in the opening (7) and/or in the fire protection material (2)

Description

1 2388 1 74

- 1 A FIRE PROTECTION SLEEVE

This invention relates to a fire protection sleeve which can be mounted on a wall.

S In the event of a fire, fire protection sleeves of this type effect the fire- and smoke-proof closure, by means of intumescent fire protection materials, of the annular space which exists between the wall and a pipeline which is led through the latter. A range of fire To protection sleeves of different lengths and inside diameters is customary for different pipelines.

According to DEl9852120, a sheet metal shell which is of perforated design with regular openings can be bent round the pipeline with just a little work. It can be 15 mounted on a wall via removably associated, separate angular wall hooks which extend longitudinally outwards and fit radially inwardly behind the end face of the fire protection sleeve. Wall hooks of this type have to be manufactured to specific lengths depending on the fire 20 protection sleeve.

According to DE4411220, a fire protection sleeve comprises a sheet metal shell which can be bent on site by the user round the periphery of the pipeline and which can be closed, and in which intumescent fire protection 25 materials such as exfoliated graphite are disposed radially inwardly distributed around the periphery thereof. It can be mounted on a wall via removably associated, separate angular wall hooks which can be

-2 suspended radially outwardly in eyelets which are punched into the sheet metal shell of the fire protection sleeve.

Punching in the eyelets necessitates a special, costly tool. 5 A preferred object of the present invention consists of creating a fire protection sleeve which is suitable for large-scale manufacture in a technologically simple manner.

Accordingly, a fire protection sleeve is provided, 10 as set out in claim 1. Advantageous embodiments are given in the subsidiary claims.

A fire protection sleeve essentially comprises a shell part which has a plurality of openings, which can be placed round the periphery of a pipeline and which can 15 be closed, on the inner shell face of which an intumescent fire protection material is disposed. At least one separate, angled wall hook for mounting on a wall is removably associated with said shell part, and can be fixed radially outwardly on the shell part. The 20 wall hook comprises at least one anchoring means which radially penetrates the opening in the shell part and which ends radially outwardly of the pipeline, and which can be anchored with a self-locking effect in the opening and/or in the fire protection material.

2s Due to the anchoring means of the removably associated wall hook, which anchoring means can be anchored with a self-locking effect in an opening in the shell part and/or in the fire protection material of the fire protection sleeve, the wall hook can be fixed simply

-3 by pushing it into the opening, and the same type of wall hooks can be used for fire protection sleeves of different lengths, and they can therefore be used flexibly and can be manufactured on a large scale with a 5 tool. The shell part of the fire protection sleeve advantageously consists of sheet metal which is pre perforated with openings, such as perforated sheet or expanded metal, whereby the openings already exist in the 10 semi-finished product and thus one finishing operation can be omitted.

The anchoring means, which can have any cross sectional shape, preferably has an outer circle diameter, at least in sections, which protrudes beyond 15 the originally produced inner circle diameter of the opening by a zone of 1.0 mm, for example, which can be widened, whereby after exceeding the work of deformation which elastically widens the opening, the anchoring means becomes self-locking with a frictional fit.

20 The anchoring means is advantageously spike-shaped and tapers to a point at its end, whereby it can be introduced in a guided manner into an opening.

The anchoring means advantageously comprises at least one middle length region, which, when spatially 25 associated with the opening, assumes a self-locking position which is stable and energetically favourable with regard to self-locking anchoring, in that said length region is adjoined by radial projections or barbs

-4 which result in the secure fixing of the wall hook to the shell part, even under vibrational stresses.

The wall hook advantageously comprises two anchoring means which are spaced apart from each other, 5 whereby a positionally stable fixing of the wall hook to the shell part is achieved.

The anchoring means advantageously penetrates openings disposed in the region of overlap, whereby the periphery of the shell part is closed by the anchoring 10 means.

The invention is described in more detail with reference to an advantageous example of an embodiment, where: Figure l shows a fire protection sleeve; 15 Figure 2 shows a detail from Figure l on an enlarged scale; and Figure 3 is a detailed enlargement of portion III in Figure 2.

As shown in Figure l, a fire protection sleeve l, 20 in which an intumescent fire protection material 2 is disposed radially inwardly and is distributed over the periphery, comprises a shell part 4 made of expanded metal which is bent round the periphery of a pipeline 3 and which is closed by a region of overlap X, and 25 comprises three angled wall hooks 5 by which the shell part 4 is mounted on a wall 6 via screws. The wall hooks 5 are fixed radially outwardly to the shell part 4 in that they each have six anchoring means 8 which radially penetrate an opening 7 in the shell part 4 and are

( anchored with a self-locking effect in the opening 7; the anchoring means end radially outwardly of the pipeline.

The wall hook 5 associated with the region of overlap X at the same time joins the two ends of the shell part, 5 the periphery of which is closed.

As shown in Figures 2 and 3, a section of the spike-shaped anchoring means 8 on a wall hook 5, which anchoring means tapers to a point and is hook-like in form, has an outer circle diameter U which protrudes 10 beyond the originally produced inner circle diameter I of the opening 7 by a zone Z which can be widened elastically and which is illustrated by the hatched area.

The anchoring means 8 comprises a middle length region L which is adjoined by radial projections 9 and which in 15 the self-locking position illustrated is spatially associated with the opening 7.

Claims

-6 CLAIMS

1. A fire protection sleeve comprising a shell part (4) which has a plurality of openings (7), which can be 5 placed round the periphery of a pipeline (3) and which can be closed, and on the inner shell face of which an intumescent fire protection material (2) is disposed, and comprising at least one removably associated, separate, angled wall hook (5) for mounting on a wall (6), which lo wall hook can be fixed radially outwardly on the shell part (5), characterized in that the wall hook (5) forms at least one anchoring means (8) which radially penetrates at least one opening (7) in the shell part (4) and which ends radially outwardly of the pipeline (3), 15 and which can be anchored with a self-locking effect in the opening (7) and/or in the fire protection material (2).

2. A fire protection sleeve according to claim 1, 20 characterized in that the shell part (4) consists of sheet metal which is pre-perforated with openings (7).

3. A fire protection sleeve according to claim 1 or 2, characterized in that the anchoring means (8), at least 25 in sections, has an outer circle diameter (U) which protrudes beyond the originally produced inner circle diameter (I) of the opening (7) by a zone (Z) which can be widened.

( -7

4. A fire protection sleeve according to any one of the preceding claims, characterized in that the anchoring means (8) is spike-shaped and tapers to a point at its 5 end.

5. A fire protection sleeve according to any one of the preceding claims, characterized in that the anchoring means (8) is hook-like in form.

6. A fire protection sleeve according to any one of the preceding claims, characterized in that the anchoring means (8) comprises at least one middle length region (L), which, when spatially associated with the opening 15 (7), assumes a self-locking position which is stable and energetically favourable with regard to self-locking anchoring.

7. A fire protection sleeve according to any one of the 20 preceding claims, characterized in that the wall hook (5) comprises two anchoring means (8) which are spaced apart from each other.

8. A fire protection sleeve according to any one of the 25 preceding claims, characterized in that the anchoring means (8) penetrates openings (7) disposed in the region of overlap (X).

-8

9. A fire protection sleeve substantially as hereinbefore described, with reference to the drawings.