JP2512027Y2 - Fire protection structure for building pipe penetrations - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention is designed to
More specifically, the present invention relates to a structure for providing a fire / smoke-proof structure when a water supply / hot water supply pipe or a construction pipe for a refrigerant pipe is arranged through a wall or floor.

[0002]

2. Description of the Related Art Conventionally, in order to make a water-supply / hot-water supply pipe or a refrigerant pipe through a wall or floor into a fireproof section, first, a through hole for the pipe is formed on the wall or floor. Of the heat insulating material embedded in the place around 1m around,
After removing all except the non-combustible heat insulating material, the pipe is inserted into the through hole. After that, the voids of the removed heat insulating material are filled with mortar or other non-combustible heat insulating material to form a hermetically sealed structure. In the case of this construction method, it is inevitable to remove the flammable heat insulating material from the periphery of the through hole in advance.

For the purpose of avoiding such a work, Japanese Utility Model Publication No. 2-74686 discloses the following fire protection structure for a through portion. That is, in this fire protection structure, a through hole is formed in a wall or floor, a metal pipe is fitted into the through hole, and a pipe such as an electric wire or a plastic pipe is inserted into the metal pipe, and then the metal pipe is inserted. Both ends of the above are sealed with a composite fireproof layer in which a heat-resistant sealing material is sandwiched between flame-resistant heat-foamable composition molded bodies.

In this structure, even if a flammable heat insulating material forming a part of the pipe or a flammable heat insulating material around the through hole burns out and an opening is generated in this structure, the flame resistant heat The foamable composition molded body expands due to heat and expands, thereby closing the opening and ensuring the hermeticity of the entire penetrating portion. That is, the work of removing the heat insulating material other than the non-combustible heat insulating material from the periphery of the through hole becomes unnecessary.

[0005]

With the above structure, it is possible to avoid the work of removing the flammable heat insulating material from the periphery of the through hole. However, on the other hand, it is necessary to insert a metal pipe of a predetermined length into the through hole and fix it, and further, after passing the pipe through the metal pipe, apply the above composite fireproof layer to both ends of the metal pipe. In order to fix it, it is necessary to tighten the periphery of the composite fireproof layer with a cylindrical surrounding member, and the work required for assembling the structure becomes complicated.

Further, it is very difficult to form a large number of pipes (three or more) at a time through a metal pipe to hermetically form a composite fireproof layer. That is, when a large number of pipes are inserted into a metal pipe, since the pipes usually have a circular cross section, a gap extending in the pipe length direction is formed between the pipes. Since the cross-sectional shape of the void is relatively small, it is very difficult to fill the space with a heat-resistant sealing material or a noncombustible material to make the whole airtight.

The present invention solves the above-mentioned problems, and it is needless to say that it is not necessary to remove the flammable heat insulating material from the periphery of the through hole, and it is disclosed in Japanese Utility Model Publication No. 2-74686. Unlike the structure, it is not necessary to insert a metal pipe into the through hole or fix the composite fireproof layer, and even if multiple pipes are inserted, it is easy to form a sealed state between them. The purpose is to provide a fireproof structure for the penetration part.

[0008]

In order to achieve the above-mentioned object, a through hole formed in a wall or a floor has a cross section longer than the length of the through hole and a cross-sectional shape of an equilateral triangle, a square, a rectangle or a hexagon. After inserting at least one tubular body whose outer surface is covered with a heat-insulating layer of a silicone foam, the space between the heat-insulating layer and the through-hole is filled with a refractory filler, A fireproof structure for a building pipe penetration is provided, which is filled with a heat-resistant sealing material and hermetically seals the vicinity of the opening.

In the structure of the present invention, the tubular body 1 which is inserted into the through hole of the wall or the floor has a silicone foam whose outer surface has a square cross section, for example, as shown in the perspective view of FIG. It is covered with a heat insulating layer 2 of the body. This tubular body 1 is perforated in a wall or floor 3 as shown in FIG.
It is inserted into a through hole 5 having a predetermined diameter, the periphery of which is protected by a support fitting 4. At a substantially central position in the longitudinal direction of the through hole 5, the space 6a formed between the heat insulating layer 2 and the through hole 5 (support metal fitting 4) is filled with the refractory filling material 7, and further, both ends of the through hole 5 are filled. The heat-resistant sealing material 8 is filled in the space 6b formed between the through hole 5 and the heat insulating layer 2 in the vicinity of the opening, and the whole has a sealed structure.

The pipe body 1a is not particularly limited, and for example, a pipe of copper or its alloy, an iron pipe, an aluminum pipe, a metal pipe such as a stainless pipe, or a non-metal pipe made of ceramics, glass, FRP or the like. Further, a resin pipe made of polyolefin such as polybutene, polyethylene, polypropylene or a cross-linked product thereof, polyamide or the like can be used.

The heat insulating layer 2 is composed of a silicone foam, and this silicone foam has a chemically stable Si--O bond as the main chain. For example, a foamed molded product of liquid silicone rubber. It is also a foamable molded product of millable silicone rubber. In order to form the heat insulating layer 2 on the outer surface of the tubular body 1a, for example, a rectangular parallelepiped block of silicone foam is formed in advance, and then a hole having a diameter substantially equal to the outer diameter of the tubular body 1a is formed at the center thereof. The tubular body 1a may be inserted through the hole, or the foamed silicone rubber may be extrusion-coated directly on the outer surface of the tubular body 1a.

The heat insulating layer 2 has a cross-sectional shape of a regular triangle, a rectangle or a regular hexagon in addition to the square shown in the figure. By making the cross-sectional shape of the heat insulating layer 2 into the above-mentioned shape, for example, when a plurality of (4 in the figure) pipes are inserted into the through holes 5 as shown in FIG. The 2a are in close contact with each other and no void is formed between them.

Even when the cross-sectional shape of each heat insulating layer 2 is a regular triangle, a rectangle, or a regular hexagon, it is possible to obtain a state in which there are no voids as a whole by collecting a plurality of them. The states are shown in FIGS. 4, 5 and 6, respectively. Moreover, the length of the heat insulating layer 2 is longer than at least the length of the through hole 5. If this is shorter than the length of the through hole 5, the heat-resistant sealing material 8 for sealing the vicinity 6b of the opening of the through hole 5
This is because the tube body 1a is exposed to, for example, a flame and suffers thermal damage when it is damaged.

The refractory filler 7 is not limited to any particular material, and has passed the 2-hour fireproof test in the fireproof test method for building structures according to JIS A1304, or is rated by BCJ (Japan Building Center). Anything will do as long as it does. Further, the shape of the refractory filler 7 is not particularly limited, and may be a fibrous or board-shaped one. Such refractory filler 7
For example, "Rock Fine Fiber" and "Rock Fine Board" (Furukawa Electric Co., Ltd.)
It is preferable to use a product name manufactured by the company.

The heat-resistant sealing material 8 is not particularly limited either, and it is one that has passed the 2-hour fire resistance test in the fire resistance test method for building structures according to JIS A1304, or BCJ (Japan Building Center). Can be anything as long as it evaluates. The shape of the heat-resistant sealing material 8 is not particularly limited and may be liquid or putty. Such heat-resistant sealing material 8
For example, "Danseal P" (trade name of Furukawa Electric Co., Ltd.) or "Silicone foam SE"
It is preferable to use "-1900" (trade name of Toray Silicone Co., Ltd.).

[0016]

Example 1 A tubular body 1 shown in FIG. 1 was produced by coating the outer surface of a copper tube 1a having an outer diameter of 22.22 mm with a heat insulating layer 2 of foamed silicone rubber having a square cross section of 42 mm on a side. did. Then, as shown in FIG. 2, a through hole 5 having a diameter of 150 mm is formed in the wall 3 having a thickness of 150 mm, and the periphery of the through hole 5 is protected by a metal support fitting 4 with a collar. As shown in FIG. 7, six tubular bodies 1 were bundled and inserted. The side surfaces of the heat insulating layer 2 of each tubular body 1 were in close contact with each other and no voids were formed.

Next, the outer diameter is 145 mm and the center is 80 in length.
50 mm thick RockFine Board 7 (trade name, Furukawa Electric Co., Ltd.)
(Made by Furukawa Electric Co., Ltd.) was filled in the vicinity 6b of the opening of the through hole 5 to form a hermetically sealed structure. JI
At a temperature specified in SA-1304, one side of the wall 3 is heated 2 hours, maximum surface temperature of the non-heated side of Danshiru P8, unheated side of the heat insulating layer located in the vicinity of the Danshiru P8 2
The highest surface temperature and the presence or absence of smoke were observed. The results are shown in Table 1. Example 2 As shown in FIG. 8, a floor 3 having a thickness of 150 mm has a diameter of 150 mm.
mm through holes 5 are formed, and the periphery of the through holes 5 is protected by a metal support fitting 4 with a collar, and six tubular bodies 1 are bundled and inserted into the metal support fittings 4 with a collar. . The side surfaces of the heat insulating layer 2 of each tubular body 1 were in close contact with each other and no voids were formed.

Next, a lock fine board 7 (trade name, Furukawa Electric Co., Ltd.) is hollowed out into a rectangle having an outer diameter of 145 mm, a height of 50 mm, and a central portion having a length of 80 mm and a width of 122 mm.
(Made by Japan) is pushed into the through hole 5, and silicone: foam SE-1900 ( trade name,
It was filled with Torre Silicone Co., Ltd., and the whole structure was sealed.

With this fireproof structure, the same combustion experiment as in Example 1 was conducted. The results are shown in Table 1. Comparative Example 1 In the structure of Example 2, the tubular body 1 was replaced by an outer diameter of 22.2.
A bundle of 6 tubular bodies 1 each having an outer surface of a 2 mm copper tube covered with a heat insulating layer of foamed silicone rubber having a thickness of 10 mm was used, and a space between the tubular bodies was filled with a Dunseal P. A floor fire protection structure was assembled in the same manner as in Example 2 except that.

Table 1 shows the result of the combustion experiment in this structure. Comparative Example 2 In Comparative Example 1, the voids of the tubular bodies were not filled with the Dunseal P, and the floor fireproof structure was assembled with the voids left. The results of this combustion experiment are shown in Table 1. Comparative Example 3 Using a heat-insulating pipe coated with highly expanded polyethylene
-Assemble the fireproof structure described in No. 74686, and in this structure
Then, the same burning experiment as in Example 1 was performed. The result
The results are shown in Table 1.

[0021]

[Table 1]

[0022]

EFFECT OF THE INVENTION As is clear from the above description, the fireproof structure of the present invention has a maximum surface temperature on the non-heated side of lower than 200 ° C. and produces a small amount of smoke, and exhibits a sufficiently excellent heat resistance effect. Play. Even in the case of piping a plurality of pipes, the workability at the time of assembly is good, and the practical value thereof is very large.

[Brief description of drawings]

FIG. 1 is a perspective view of a tubular body incorporated into the structure of the present invention.

FIG. 2 is a sectional view showing an example of the structure of the present invention.

FIG. 3 is a front view showing a state in which four tubular bodies each having a square heat insulating layer section are inserted.

FIG. 4 is a front view showing a state in which four tubular bodies each having a triangular heat insulating layer section are inserted.

FIG. 5 is a front view showing a state in which three tubular bodies having a rectangular heat insulating layer cross section are inserted.

FIG. 6 is a front view showing a state where four tubular bodies each having a heat insulating layer cross section of a regular hexagon are inserted.

FIG. 7 is a front view showing a state in which six tubular bodies each having a square heat insulating layer cross section are bundled and inserted into a through hole.

FIG. 8 is a side sectional view showing the structure of another embodiment of the present invention.

[Explanation of symbols]

 1 Tubular Body (Piping) 1a Tubular Body 2 Thermal Insulation Layer of Silicone Foam 2a Side of Thermal Insulation Layer 3 Wall or Floor 4 Supporting Metal 5 Through Hole 6a, 6b Void Between Tubular Body 1 and Through Hole 7 Fireproof Filler 8 Heat-resistant sealing material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeyuki Nemoto 1-6 Uchiyuki-cho, Chiyoda-ku, Tokyo Inside Nippon Telegraph and Telephone Corporation (72) Innovator Naoya Kurata 3-10-19 Nishi-Kamakura, Kamakura-shi

Claims (1)

(57) [Scope of utility model registration request] 1. A heat insulating layer of a silicone foam, which is longer than the length of the through hole and has a cross-sectional shape of an equilateral triangle, a square, a rectangle or a hexagon, in a through hole formed in a wall or a floor. After inserting at least one tubular body whose surface is covered, filling the space between the heat insulating layer and the through hole with a refractory filler, and then filling a heat resistant sealant near the opening of the through hole. Then, a fireproof structure for a building pipe penetration is characterized in that the vicinity of the opening is sealed.