JPH0538757Y2 - - 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, it relates to a fire and smoke prevention structure at a penetration portion where a plastic conduit, a cable or a noncombustible conduit covered with a heat insulating material made of plastic material penetrates the floor or wall of a fireproof compartment.

(Prior art and its problems) To explain the case of the floor 4 as a conventional structure for fire and smoke prevention measures for openings in the wall or floor 4 or passages for conduits 5, cables, etc., As shown in the figure, drop the fireproof plate support 1 into the opening,
A fireproof plate 3 is disposed on the fireproof plate support 1, and then a mortar-like filler 6 is filled as a fireproof filler.

In the conventional example here, the fireproof plate support 1 is made of iron strips, the fireproof plate 3 is a ceramic board, and the fireproof filler 6 is a so-called mortar-like filler 6 that is a mixture of gypsum, vermiculite, cement, etc. be.
Therefore, the construction is carried out by adding a specified amount of moisture (depending on the type, a specific hydrating agent may be used) to the refractory filler 6 at the construction site, mixing and stirring, and then filling. do. Generally, the thickness of this filling needs to be at least the thickness of the floor or wall 4. In particular, in the case of cables, the thickness is 200 to 300 mm due to the nature of the material, which has good thermal conductivity. is necessary.

However, such a conventional example has the following problems. In other words, (a) the mixing ratio with water needs to be as specified, (b) it takes time to dry (harden) the filling, and (c) it is necessary to completely dry (completely dry) especially at the cable penetration part. It took approximately one month for the cable to harden (hardening), and if the cable moved or vibrated during this time, gaps would form, which could make the structure unsuitable for this type of penetration. (d) Furthermore,
After complete drying, the filling material had to be dismantled when adding or removing cables, and as a matter of course, there were many drawbacks, such as the need for re-installation in the same way as described above after the cables were disposed of.

The present invention sufficiently solves these conventional problems, and without losing the original characteristics of flame-retardant fillers, reduces the troublesomeness and variation in workability during on-site construction, and simplifies the process. Moreover, it is an object of the present invention to provide a structure for fire and smoke prevention measures for penetrations of plastic conduits or cables through floors or walls, etc., which is advantageous in post-construction treatment and re-construction work, and is more completely reliable.

(Means for Solving the Problems) The present invention, as shown in FIGS. 4
A heat-foamable flame-retardant composition surface layer 1 is applied to the surface of the fire-resistant core material layers 9 and 9' in the gap 8 defined between the inner wall 7 of the plastic conduit or the outer circumference of the plastic conduit or cable 5.
A fireproof composite filling member 1 having a desired shape such as a substantially spherical shape, a hexahedral block shape, or a columnar shape, provided with 0.0, 10'
1 and 11' to form a filling layer 12.

That is, in FIGS. 1 and 4, the reference number 4 is the floor, 5 is the cable passing through, 2 is the iron fireproof plate support, 3 is the fireproof plate made of calcium silicate, 1
1 is a fireproof composite filling member. This fireproof composite filling member 11 is shown in FIG. 2 or 3, and also in FIG.
As shown in the figures through FIG. 8, the block member is constructed by providing a fire-resistant core material layer 9, 9' in the center and a thermally foamable composition surface layer 10, 10' on the outer periphery thereof.

These large numbers of fireproof composite filling members 11, 1
1' are packed into the void 8 to form a filled layer 12. A flame retardant or non-combustible covering material layer 13 may be further provided on top of this filling layer 12 so as to cover it.

Moreover, the fire-resistant core material layers 9, 9' as an example are as follows:
It is a 40 mm square columnar object made of calcium silicate material, or a sphere, etc., and the thermally foamable composition surface layer 10,1
For example, FOMOX (product name: FOMOX, manufactured by Bayer AG, West Germany) was used as 0', and was coated on the surface of the calcium silicate column or sphere to a thickness of about 5 mm. In addition, a fire-resistant composite filling member 11, 11', which is similarly coated (coated) with a thermally foamable material to a thickness of 3 mm, is placed on a 25 mm square columnar body (or a spherical body diameter of 25 mm) made of calcium silicate material. , 4 was filled as shown in Figure 4.

As for the filling method, after inserting the fireproof plate 3 that will become the bottom plate, the fireproof composite filling member 1 of 50 mm square or 50 mm diameter is inserted.
1, 11', and small gaps are filled with 35mm square,
Alternatively, the refractory composite filling members 11, 11' having a diameter of 35 mm were filled to a substantially full filling amount. The length of the column used here was 250 mm.

A 3 x 60mm ² CV power cable was used as the cable, and the lower part of the floor was heated in accordance with the standard fire curve of JIS A 1304, and the progress during heating and the anti-fire side after 2 hours (maximum 1010℃) were measured. A predetermined cable temperature (points marked * in Figure 1) was measured.

After heating, a small amount of smoke penetrated through the gap between the fireproof composite filling members 11 and 11' for 3 to 5 minutes, but the amount of smoke passing through gradually decreased, and after 15 minutes, smoke passed through the gap. It's gone.

In addition, the maximum temperature on the anti-fire side after 2 hours of heating is
The temperature was 295°C, which did not reach the flammability temperature of the cable sheathing material (341°C of polyethylene), and was found to be sufficient as a structure for the penetration of cables into fireproof compartments.

In FIG. 3, instead of FIG. 2, the refractory composite filling member 11' is shown as a cylinder, but the present invention is not limited to the above-mentioned prismatic or cylindrical shapes, and may be of any other shape, such as triangular or hexagonal.

Furthermore, in FIG. 1 and FIG. 4, the fireproof composite filling members 11, 1 are shown in order to further reduce the passage of smoke.
If the surface after filling 1', that is, the surface of the filling layer 12, is coated with a flame-retardant or non-combustible coating material layer 13, the effect will be further improved and more complete.

This coating material layer 13 may be a flame-retardant putty-like material Danseal (trade name manufactured by Furukawa Electric Co., Ltd.) or mortar, a trade name used in the present invention.
The material is not particularly limited as long as it is a flame-retardant or fire-resistant material, such as a thermally foamed flame-resistant material such as Fomox.

Although the refractory composite filling members 11, 11' are shown as cubes in FIG. 7 instead of in FIG. 5, the present invention is not limited to the external shape as described above. The refractory core material may be any refractory material such as calcium silicate, mortar, plaster, ceramic, diatomaceous earth, etc., and is not particularly limited.

Furthermore, the flame-resistant foamable composition used in the present invention for forming the heat-foamable composition surface layers 10, 10' mainly consists of a filler and an expanding agent, and is not exposed to flame or exposed to heat at 250° C. It forms a fire-resistant foam insulation layer at high temperatures of ℃ or higher. This composition is described in more detail with respect to the total weight of the following four components: 5 to 70% by weight of carbon source, also 5 to 70% by weight catalyst, also 5 to 70% by weight blowing agent, 1 to 80% by weight
% by weight of spherical or nearly spherical fillers. The carbon source is one that can provide a carbon structure to the heat insulating foam, contains many groups that can be esterified with boric acid or phosphoric acid, especially hydroxyl groups, and contains many carbon atoms, Examples include carbohydrates, polyhydroxy alcohols, and forumose pentaacetate, and the catalyst is aluminum orthophosphate, which decomposes at a temperature below the decomposition point of the carbon source to produce as much boric acid or phosphoric acid as possible. The blowing agent is one that generates nonflammable gas, such as guanylurea, cydiandiamide, melamine, and urea. Also, the filler is preferably inorganic hollow beads. Such a composition is in the form of a putty and is commercially available from Bayer AG of West Germany under the trade name Fomotux. For other purposes of the present invention, a fire-resistant foamable composition containing a mixture of ceramic fiber and vermiculite can be used.

(Effects) As described above, according to the present invention, the plastic conduit floor or It is possible to provide a fire and smoke prevention structure for a penetrating part of a wall or the like.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing one embodiment of the present invention;
FIG. 2 is a perspective view showing a fireproof composite filling member according to one embodiment of the present invention, FIG. 3 is a perspective view showing a fireproof composite filling member according to another embodiment of the present invention, and FIG. 4 is a perspective view showing a fireproof composite filling member according to another embodiment of the present invention. FIG. 5 is a schematic cross-sectional view showing still another embodiment of the present invention.
A perspective view showing the fireproof composite filling member in Figure 6.
7 is a perspective view showing a fireproof composite filling member according to another embodiment of the present invention, FIG. 8 is a sectional view thereof, and FIG. 9 is a structure of a conventional example. FIG. 1... Fireproof plate support, 2... Holder frame body, 3...
Fireproof plate, 4... Floor or wall, 5... Plastic conduit or cable, 6... Mortar-like filler, 7
... Floor or inner wall of wall 4, 8 ... Void, 9, 9'
...Fire-resistant core material layer, 10, 10... Heat-foamable composition surface layer, 11, 11'... Fire-resistant composite filling member, 1
2...Filled layer, 13...Flame retardant or noncombustible coating material layer.

Claims (1)

[Scope of utility model registration request] Floor or wall 4 of plastic conduit or cable 5
In the void 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 the penetration part of the Penetration of a floor or wall of a plastic conduit or cable, characterized in that a filling layer 12 is formed by filling a fireproof composite filling member 11, 11' with a composition surface layer 10, 10' and having a desired shape. Department of fire and smoke prevention measures structure.