JPH0545322Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a structure for fire and smoke prevention measures for penetration parts of plastic conduits or cables through floors or walls, etc.
In particular, the present invention relates to a structure for fire and smoke prevention measures at a penetration part of a plastic pipe or a noncombustible pipe covered with a heat insulating material made of plastic material, which penetrates the floor or wall of a fireproof compartment.

(Prior art and its problems) Conventionally, this type of fire and smoke prevention structure for the penetration part of the floor or wall 4 etc. of plastic conduits or cables 5 used as water supply and drainage pipes, electric conduit pipes, etc. The floor of the compartment and the gaps between the penetrations of the walls 4 are filled with a refractory filler. In the case of plastic pipes or cables 5, in the event of a fire, the plastic pipes themselves will burn, and there is a great danger that the area will become an opening for the spread of fire or a flue. There were roughly the same dangers on the road. In the conventional example, the wall or floor 4
When a noncombustible conduit such as a metal pipe is passed through a through-hole in a structure such as the This structure is designed to stop the spread of fire.

Further, to further explain a conventional example of a floor with reference to FIG. 6, a fireproof plate support (strip) 12 is dropped into the opening 13 of the cavity 8, a fireproof plate 14 is installed, and then a fireproof plate 14 is installed as a fireproof filler. , the foamable silicone 15 was injected and foamed to fill the opening 13. In the conventional example here, the refractory metal fitting 12 is made of iron strip, the refractory plate 14
is made of ceramic board, foamed silicone is made of
The product name is SEF-1900 manufactured by Furukawa Electric Co., Ltd.

With such conventional configurations, in-situ injection of foamable silicone 15 is extremely difficult. Specifically, the foamable silicone 15 is generally a two-component mixture type, but approximately equal amounts of the two solutions A and B are quickly and uniformly mixed (about 30 to 60 seconds) and immediately applied to the desired location. need to be injected. In addition, when injecting, as shown in Figure 6, heat foaming is achieved by injecting in several batches so that the total thickness of a, b, and c after foaming is approximately 50 mm or less, as shown in Figure 6. It is necessary to form the resin material layer 1.

The problem is that the process of quickly and uniformly mixing two liquids in equal amounts is too short (if the mixing time is extended, it will foam and harden.Also, there is a method of mixing foaming retarders for long-term mixing). However, there are other disadvantages such as insufficient foam curing at low temperatures, larger bubbles in the foam, and a lower expansion ratio), so individual differences in mixing may occur. is large, and mixing time, foaming time, and foaming ratio are influenced by material temperature and ambient temperature. As an alternative method, there is an injection method using mechanical mixing, but there are limitations to mechanical operation due to the hassle of transporting the mixture to the desired location in the building and the ability to work in narrow spaces.

In addition, after construction, it is possible to easily remove or dismantle the foam by installing or removing plastic conduits or cables through the penetrations, but after disassembly, the same troublesome fire prevention measures as mentioned above are required. Naturally, there were some problems with the work as smoke control measures were needed.

The present invention fully overcomes these conventional problems and provides a simple and more reliable method for forming floors or walls of plastic conduits or cables without losing the original properties of the flame-retardant filler. The purpose is to provide a fire and smoke prevention structure for penetration parts.

(Means for Solving the Problems) As the embodiments of the present invention can be seen in FIGS. In a fire and smoke prevention structure in which a space 8 defined between the inner wall 7 of the wall 4 and the outer periphery of the plastic conduit or cable 5 is provided with a placement section filled with flame retardant foam, A core body 9 made of the flame-retardant foam compressed to within 90% of its volume is covered with a non-fire-retardant material layer 10, and has a length equal to the depth of the flame-retardant foam placement part. A plurality of cylindrical or rod-shaped composite bodies 11 are arranged so that the length direction thereof coincides with the depth direction of the flame-retardant foam arrangement part,
In addition, the flame retardant foam placement portion is filled so that a gap communicating from the front to the rear of the flame retardant foam placement portion is formed between the composite bodies 11. Here, the depth direction of the flame-retardant foam arrangement section means the thickness direction of the floor or wall 4 or the like.

i.e. reference numeral 9 in Figures 3a and 3b.
10 is a core made of a flame-retardant foam (for example, silicone rubber foam, etc.), and 10 is a non-fire-resistant material layer made of a non-fire-resistant covering material (for example, plastic film, paper, etc.); The body is 1
0, it is compressed to within 90% of its normal volume.
FIG. 3b shows that a part of the non-refractory material layer 10 is torn;
10 is a diagram showing a state in which compression is released. That is, the core body 9 is expanded. A composite body 11 having such characteristics may be used, for example, in a cable or conduit 5.
An example of use in a floor penetration part is shown in FIGS. 1 and 4. Reference number 4 is the floor or wall, 5 is the plastic conduit or cable, 2 is the holding frame, 3 is the tightening bolt, 12 is the fireproof board holder, and 14 is the fireproof board (for example, calcium silicate board, ceramic board, etc.) 11 is a composite body in which a flame-retardant foam 9 is compressed to within 90% of its normal volume and covered with a non-refractory material layer 10. FIG. 2 is a perspective view of the main part of FIG. 1.

As described above, in the present invention, the flame-retardant foam 9 obtained by foaming in advance is used as the core, and the volume of the core is compressed to within 90% of the normal volume, and the outer periphery is covered with the non-refractory material layer 10. The composite body 11, which has been coated with a resin to maintain its shape, is used as a filling material for penetrations or openings in the floors or walls of cables or plastic conduits. The complex 11
As a feature, there is no need to mix on site, and there is no uneven mixing or filling. Furthermore, there is no risk of contaminating the work site. Furthermore, it has great features compared to conventional structures, such as the ability to easily and reliably install and remove cables or conduits.

In addition, the fire resistance performance of the structure for the penetration part is the second
As shown in the figure, a composite body 11 having a length equal to the depth of the flame-retardant foam arrangement part is placed so that its length direction coincides with the depth direction of the flame-retardant foam arrangement part, and the By filling the flame retardant foam placement portion so that a gap communicating from the front to the rear of the flame retardant foam placement portion is formed between the composite bodies 11 (in normal operations, the minimum opening area is (can be filled to 80%), in the event of a fire, first the complex 11
Hot air passes through the gaps between them, and this hot air reaches a certain temperature (approximately 90°C in the case of polyethylene film).
℃, approximately 150℃ for paper), the composite 1
At the same time, the shape-retaining function of the non-refractory material 10 covering the outer periphery of the composite body 1 is lost, and the volume of the flame-retardant foam 9, which had been compressed by the coating of the non-refractory material, is restored, and the space between the composite bodies 11 is restored. Fill the gap between
From then on, smoke and hot air can be reliably stopped from passing to the opposite side of the fire.

In particular, in the case of a plastic pipe 5 which has a hollow interior and which melts and spreads fire extremely quickly, the cavity of the plastic pipe can be closed off by the pressure generated by the volume recovery of the flame-retardant foam in the event of a fire.

In addition, since the silicone rubber foam 9 is made up of approximately 50% or more closed cells, as heating (temperature rise) progresses, the volume further expands, making it even more reliable to fill the opening. be.

Examples of the configuration of the cylindrical or rod-shaped composite body 11 mentioned here include a pipe-shaped one made of plastic film or paper, that is, a non-refractory material layer 1
0 is filled with a foamable composition that will become the core 9, foamed, and compression molded to 70 to 80% of the normal foam volume. In addition, the freely foamed material can be mechanically compressed (80% of the original volume).
There is also a structure in which the shape of the core body 9, which has been removed (~90%), is maintained with a layer 10 of non-refractory material such as plastic film or paper, but any method may be used and there is no particular limitation. Although plastic and paper are shown as materials for the non-refractory material layer 10 of the composite 11, the flame-retardant foam is compressed to within 90% of its normal volume and maintained at room temperature. It is not particularly limited as long as it is a material (mechanism) that loses its compression function at high temperatures (approximately 80° C. or higher).

(Effects) As detailed above, according to the present invention, it is possible to provide a structure for fire and smoke prevention measures for a penetration part of a plastic conduit or cable through a floor or wall, etc., which is simple and more completely reliable. .

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing one embodiment of the present invention, FIG. 2 is a schematic perspective view showing the main parts of an embodiment of the present invention, and FIGS. 3a and 3b are respectively FIG. 4 is a perspective view showing a composite body in one embodiment of the invention, FIG. 4 is a schematic cross-sectional view showing another embodiment of the invention, and FIG.
FIG. 6 is a schematic cross-sectional view taken along line E', and FIG. 6 is a schematic cross-sectional view showing an example of the conventional technology. DESCRIPTION OF SYMBOLS 1... Heat foamable resin material layer, 2... Pressing frame body, 3... Tightening bolt, 4... Floor or wall, 5...
Plastic conduit or cable, 7... Inner wall of floor or wall 4 at penetration part, 8... Void, 9...
Core (flame-retardant foam, silicone rubber foam),
10...Non-refractory material layer (plastic film, paper, etc.), 11...Cylindrical or rod-shaped composite, 1
2... Fireproof plate support (row), 13... Opening, 1
4... Fireproof board, 15... Foaming silicone.

Claims (1)

[Scope of claim for utility model registration] Floor or wall 4 of plastic conduit or cable 5
A flame-retardant foam is placed in a gap 8 defined between the inner wall 7 of the floor or wall 4 and the outer periphery of the plastic conduit or cable 5 in a penetration part such as a flame-retardant foam. A fire and smoke prevention structure comprising a core body 9 made of the flame retardant foam compressed to within 90% of its normal volume is covered with a layer 10 of non-fire resistant material, and A plurality of cylindrical or rod-shaped composite bodies 11 having a length equal to the depth of the flame retardant foam placement section are placed in such a manner that the length direction thereof coincides with the depth direction of the flame retardant foam placement section, and A plastic conduit characterized in that the flame-retardant foam arrangement part is filled with the flame-retardant foam arrangement part so that a gap communicating from the front to the rear of the flame-retardant foam arrangement part is formed between the composite bodies 11. or fire and smoke prevention structures for cable penetrations in floors, walls, etc.