JP2550381Y2 - Fire protection structure for penetrations of electric wires, conduits, etc. in fire protection compartments such as floors and walls - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a fire prevention measure structure of a penetration portion in which a penetration member such as an electric wire or a conduit pipe penetrates a fire prevention compartment such as a floor or a wall. It is suitable for a fire prevention structure at a penetrating portion through which a synthetic resin flexible tube, a heat insulating material covering tube, or the like penetrates.

(Prior Art) In a penetrating part in which a penetration member D such as a cable or a conduit is penetrated by opening an opening B in a fire protection section A such as a floor or a wall provided in a building such as a factory or a building. Must be filled with fireproof material and fireproofed by sealing it.

As a typical example of this fire protection structure,
Some are shown in the figure. This is the penetration part seat D of the fire protection compartment A
A non-combustible fiber E, such as rock wool, is filled in a gap in the opening B through which the piercing plate is inserted, and a fire-resistant plate F, such as a calcium silicate plate, is attached to both surfaces of the opening B. Is filled with a heat-resistant sealing material G. This fire protection structure has been evaluated as having two hours of fire resistance.

This fire-prevention measure structure includes a penetrating member D other than the above, for example, as shown in FIG. 7a, a synthetic resin flexible tube C in which an electric wire H is laid, and a heat insulating material in which a heat insulating material is coated on the outside of a metal tube. It is also used when a material cladding tube or the like is pierced through the fire protection compartment A.

(Problem to be Solved by the Invention) However, the electric wire H is placed in the synthetic resin flexible tube C.
Is not completely filled, and in general, there is a considerable gap between the flexible tube C and the electric wire H as shown in FIG. It is like that. In some cases, such a synthetic resin flexible tube C is provided as a spare, in which case the flexible tube C is initially provided.
The electric wire H may be empty without being wired at all.

For this reason, in the case of a conventional fire protection structure, in such a case, when a fire occurs, as shown in FIG.
There is a drawback in that the inside becomes a flame path, and the fire prevention measures at the corner are almost useless.

Moreover, since the outer sheath of the synthetic resin flexible tube C and the electric wire H is formed of a material such as flammable polyethylene or polyvinyl chloride, the flame in the flexible tube C travels quickly and spreads in a short time. Sometimes I did.

Further, in the case of the heat insulating material coated tube, since the heat insulating material is a flammable material such as foamed polyethylene, the heat insulating material serves as a fire conductor, causing the same problem as in the above case.

(Purpose of the present invention) The purpose of the present invention is to automatically block the flame path when a fire occurs, and to prevent the subsequent spread of fire from that part. It is an object of the present invention to provide a fire prevention structure for a penetration portion.

(Means for Solving the Problems) The fire protection structure of the penetration part of the electric wire, the conduit, etc. in the fire protection compartment such as the floor or the wall of the present invention is opened to the fire protection compartment A such as the floor or the wall as shown in FIG. In a through-hole such as an electric wire or a conduit of a fire-prevention compartment in which a penetrating member D such as an electric wire or a conduit is penetrated through the formed opening B, the refractory material is provided when the opening B is penetrated by the penetrating member D. It is backfilled with 1 and sealed,
The outer periphery of both penetrating portions of the penetrating member D, which protrude outside the fire protection compartment A, is coated with the heat-foamable refractory material 2, and the fire-resistant presser 3 having the insertion portion 11 outside the heat-expandable refractory material 2 is provided. The refractory retainer 3 is inserted, and the insertion portion 11 of the refractory retainer 3 is inserted into the refractory material 1 and integrally attached to the refractory material 1, and the thermally foamable refractory material 2 is supported by the refractory retainer 3. It is.

(Operation) In the fire prevention structure of the present invention, in the fire prevention section such as a floor or a wall, a penetration portion of an electric wire or a conduit is used as shown in FIG. The heat-foamable refractory material 2 on both sides of the penetrating member D, which protrudes outside the fire-prevention compartment A, is sealed by the fire-resistant holding member 3.
When a fire occurs in one of the spaces of the fire protection compartment A, as shown in FIG. 2, the heat-foamable refractory material 2 in the fire-resistant holding member 3 in the same space foams due to the fire or heat. Swell. At this time, the insertion portion is provided on the outside of the heat-expandable refractory material 2.
11 is covered with the fire-resistant press
Is inserted into the refractory material 1 and integrally attached to the refractory material 1, and the refractory retainer 3 supports the refractory material 2. It cannot expand to the outside of the penetrating member D, but expands exclusively in a direction to crush the penetrating member D. Thereby, for example, when a synthetic resin flexible pipe C is penetrated as the penetrating member D, the expanded thermally foamable refractory material 2 enters the flexible pipe C and When the fire becomes larger, the expanded thermal foamable refractory material 2 presses the synthetic resin flexible tube C from the outside to crush the flexible tube C, and the inside of the flexible tube C It is completely closed and becomes an oxygen-deficient state, so that the spread of fire to the following is prevented.

Further, when a heat insulating material covering pipe is provided as a penetrating member, the heat insulating material on the outer periphery thereof is tightened from the outside by the expansion of the heat-foamable refractory material, and the portion becomes oxygen-deficient as described above. Is prevented from spreading.

(Embodiment) Fig. 1 to Fig. 6 show an embodiment of a fire prevention structure of a penetration part of an electric wire, a conduit or the like in a fire protection compartment such as a floor or a wall of the present invention.

In these figures, A is a fire protection section such as a floor or a wall, B is an opening provided in the section A, and C is a polyethylene corrugated conduit piped in the opening B [Plaflex or Puraflex. CD (both are trade names)]. An electric wire H is inserted and wired in the synthetic resin flexible tube C.

Reference numeral 1 shown in these figures denotes a refractory material which is filled in the opening B in which the synthetic resin flexible tube C is penetrated and fills the opening B. As the refractory material 1, for example, mortar or vermiculite is used.

Reference numeral 2 denotes a heat-foamable refractory material that is coated on the outside of both penetrating portions of the synthetic resin flexible tube C that protrude from the fire protection compartment A. The thermally foamable refractory material 2 foams when heated to form a foamed heat insulating layer, and when heating is continued, the previously formed foamed heat insulating layer peels off to form a new foamed heat insulating layer. This action is repeated to maintain the heat insulating effect for a long time. In this embodiment, the heat-expandable refractory material 2 is formed into a belt-like body, which is formed on the outer periphery of both of the penetrating portions of the synthetic resin flexible tube C which protrude from the fire protection compartment A as shown in FIG. It is wound and covered.

For example, “Danseal F” (trade name: manufactured by Furukawa Electric Co., Ltd.) is used as the thermally foamable refractory material 2. This “Danseal F” is a foam that has already been foamed to some extent, and has a small heat capacity and a high volume foaming rate. Therefore, the heat inside is quickly transmitted and rapidly expanded greatly, so that the gap in the synthetic resin flexible tube C is reliably closed. Moreover, since it is a foam, it is soft and easily adapts to the flexible tube C, and after foaming, it changes into an insulated product having a high heat insulating property, so that there is an advantage that the heat insulating effect is extremely high.

In addition, "Danseal D" is used as the thermally foamable refractory material 2.
(Trade name: Furukawa Electric Co., Ltd.) may be used. This “Danseal D” is a putty-like composition that is not foamed, and has a large heat capacity and a high density. Therefore,
Although the speed is relatively low, the flexible tube C made of synthetic resin can be crushed by a strong pressing force, and the inside of the flexible tube C is completely closed. Moreover, as in the case of the "Danseal F", after foaming, it changes into an insulated product having a high heat insulating property, so that the heat insulating effect is extremely high.

In addition to the above, for example, Phomox (trade name: Bayer AG, Germany) or Firestop (trade name: Dow Corning, USA) can be used as the thermally foamable refractory material 2.

Reference numeral 3 denotes a fire-resistant presser which is placed over and supports the two layers of the thermally foamable refractory material. The refractory presser 3 has an insertion portion 11, which is inserted into the refractory material 1 having the opening B closed and fixed so as to be integrated with the refractory material 1. In this embodiment, a heat-resistant band 7 is further wound around the outside of the refractory presser 3.

For example, as shown in FIG. 4, a series of wavy support portions 12 are formed on one side in the width direction of the strip-shaped metal sheet 10 and insertion portions 11 are protruded at appropriate intervals on the other side in the width direction as shown in FIG. I have. The refractory retainer 3 is wound around the thermally foamable refractory material 2 so that both ends in the longitudinal direction thereof are aligned, and the insertion portion 11 is inserted into the refractory material 1 and fixed so as to be integrated therewith. Have been. Further, in this embodiment, the corrugated support portion 12 is bent inward so that the thermally foamable refractory material 2 is supported.

Note that the refractory retainer 3 may have a plurality of through holes 15 formed in the portion to be inserted into the refractory material 1 as shown in FIG. 1 enters, and the refractory retainer 3 is firmly fixed to the refractory material 1. The refractory presser 3 in FIG. 5 has the insertion portion 11 on the forward side in the width direction.

In this embodiment, a flexible tube C made of synthetic resin is used as the penetrating member D.
Although only the fire protection structure of the penetration part of the fire protection compartment A of the present invention has been described in detail, the fire prevention measure structure of the present invention is applied to the penetration of the fire protection compartment such as ordinary electric wires, conduits, pipes, and thermal insulation cladding tubes. Are also widely used, and their use is not particularly limited.

(Effects of the Invention) The structure of the fire protection device of the penetration part of the electric wire and the conduit in the fire protection compartment such as the floor and the wall of the present invention has the following effects.

. When a fire occurs in one space of the fire protection compartment, the heat-foamable refractory material 2 covered with a fireproof presser 3 covering the outer periphery of the penetration member D protruding from the fire protection compartment A becomes the penetration member D. Is expanded and swelled in the direction of crushing, so that the penetrating member D is finally closed and the portion becomes oxygen-deficient, thereby preventing the subsequent spread of fire.

. The opening B having the penetrating member D penetrated is refractory material 1
Then, the outside of both penetrating portions of the penetrating member D protruding from the fire protection compartment A is covered with the heat-foamable refractory material 2 and the outside thereof is covered with the refractory holding member 3 having the insertion portion 11. Since it is only necessary to insert the insertion portion 11 into the refractory material 1, it is not necessary to use fasteners such as screws, nuts, bolts, etc. to fix the refractory presser 3 to the refractory material 1. This facilitates the mounting of the refractory presser 3 and improves workability and workability.

. The fire prevention measure structure of the penetration part of the present invention is suitable for installing a resin pipe for hot water supply and water supply in a place where a pipe is pierced through a wall (fire prevention compartment). In most cases, resin pipes for hot water supply and water supply are piped directly on the floor and fixed to the floor by stoppers (commonly called “floor rolling pipes”). In this “floor rolling pipe”, when a resin pipe is piped through a wall (fire prevention compartment), an opening (B in FIG. 1) is passed through a root portion (boundary portion with the floor surface) of the wall surface. , A resin tube is pierced through the opening. In this case, the floor immediately below the opening is the floor, and there is almost no space between the opening and the floor.
Therefore, when attaching the refractory presser 3 covering the outside of the thermally foamable refractory material 2 to the refractory material 1 as shown in FIG. 2 of the present application, a tightening bolt is usually provided between the lower part of the opening and the floor surface. It is often difficult to secure a working space for use and mounting, and it is often difficult to fix with a fastening bolt. However, in the fire prevention measure structure of the present invention, an insertion portion 11 is formed in the refractory presser 3, and the insertion portion 11 is inserted into the refractory material 1 to fix the refractory presser 3 to the refractory material 1. Even if it is not possible to secure a working space for using the tightening bolt between the part and the floor, the working can be easily and reliably performed.

. According to building regulations, the penetration of the fire protection compartment is 2 hours (1010
℃) or higher, but when the fire-resistant presser 3 is attached from the outside with bolts or the like, deformation of the fire-resistant presser 3 due to heat, improper installation due to narrow installation space, cracks on the wall, etc. As a result, the bolts come off in the event of a fire, and the heat-resistant foam 2 and the refractory retainer 3 fall off,
There is a possibility that the effect of the fire prevention measures may not be obtained, but the fire prevention structure of the present invention does not have such a case.

[Brief description of the drawings]

FIG. 1 shows electric wires in a fire-prevention compartment such as a floor or a wall of the present invention.
FIG. 2 is a partial cross-sectional perspective view showing a fire prevention structure of a penetrating portion such as an electric conduit, FIG. 2 is a vertical cross-sectional view showing a state of the fire prevention structure at the time of fire, and FIG. FIG. 4 is a perspective view showing an example of a fire-resistant press used in the fire protection structure, FIG. 5 is a perspective view showing another example of the fire-resistant press, and FIG. FIG. 7 (a) is a longitudinal sectional view showing a conventional fire prevention structure of a penetration portion of an electric wire, a conduit or the like in a conventional fire protection compartment such as a floor or a wall, and FIG. (B) is a longitudinal sectional view showing a state at the time of a fire in FIG. 1 is a refractory material 2 is a heat-expandable refractory material 3 is a refractory retainer A is a fireproof partition such as a wall or a floor B is an opening C is a flexible tube made of synthetic resin D is a penetrating member

Claims (1)

(57) [Scope of request for utility model registration] An electric wire or conduit for a fire-prevention compartment in which a penetrating member (D) such as an electric wire or a conduit penetrates an opening (B) opened in a fire-prevention compartment (A) such as a floor or a wall. And the like, the opening (B) is backfilled with the refractory material (1) in the penetrating state of the penetrating member (D) and sealed, and the fireproof partition (A) of the penetrating member (D) is formed. ) A thermal foaming refractory material (2) is coated on the outside of the both penetrating portions protruding outside, and a fire-resistant presser (3) having an insertion portion (11) on the outside of the thermal foaming refractory material (2). The refractory presser (3) is inserted, and the insertion part (11) of the refractory holder (3) is inserted into the refractory material (1).
Characterized in that a thermo-foamable refractory material (2) is supported by the refractory retainer (3), and a penetration of an electric wire or a conduit in a fire section such as a floor or a wall. Measure structure.