JPH06463U - Fire protection structure for the penetration of a long fire protection compartment - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a fireproof structure in which deformation or ignition of a pipe on the side opposite to a fire does not occur, particularly when the elongated body is a large-diameter plastic pipe. A heat-insulating material having a heat-expandable refractory material 5 disposed on one side of the through hole 2 and having heat resistance at the other end of the through hole 2 in a fire protection structure for a penetration portion of a long fire protection compartment. The spacer 16 formed in 1 was arranged so as to surround the elongated body 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention provides a fireproof structure in which a flammable elongate body such as a plastic pipe penetrates a fireproof partition of a building, and particularly an elongate body suitable for a case where the elongate body has a large diameter. The present invention relates to a fireproof structure (hereinafter abbreviated as a fireproof structure) of a penetration portion of a fireproof compartment.

[0002]

[Prior art]

 If a plastic pipe is laid through a fireproof partition such as a floor or wall of a building, a fire that occurs on one side partitioned by the fireproof partition will be transmitted to the other side through the plastic pipe. It may spread. Therefore, such a penetration part is made into a fireproof structure by using a heat-expandable refractory material. However, the structure established in Japan as a fireproof structure using heat-expandable refractory material is for thin plastic pipes with an outer diameter of approximately 38 mm or less, and is used for the penetration part of large diameter pipes with an outer diameter of 100 mm class. No suitable fire protection structure has yet been established.

As a fireproof structure using a heat-expandable refractory material for a large-diameter plastics pipe, a structure shown in FIG. 9, which is used overseas, is known. In this fireproof structure, a cover 8 surrounding the pipe 3 is screwed to one surface of the floor 1 as a fireproof compartment, and the heat-expandable fireproof material 5 is enclosed in the cover 8 so as to surround the pipe 3. Is stored. According to this fireproof structure, when the plastic pipe 3 burns upward from the lower part due to the fire that occurs under the floor 1, when the burning part approaches the part containing the heat-expandable refractory material 5, The pipe 3 whose thermal expansive refractory material 5 has expanded and softened by heat is crushed as shown in FIG. 10 to stop the spread of flame through the pipe 3.

[0004]

[Problems to be Solved by the Invention] However, although this fireproof structure passes the fireproof rating test in the United States and Austria, it may fail in the fireproof rating test in Japan which may be established in the future. That is, in a fire resistance rating test in the United States, etc., the test product is placed in a test furnace and heated for 2 hours, then the test product is immediately pulled out from the furnace without waiting for the furnace to cool, and water is collected and discharged into the penetration part by a fire hose. A hose test is conducted, and the main focus of the test is that water does not pass through the penetration part in this hose test. On the other hand, in the fire resistance evaluation test in Japan, the test product is heated for 2 hours and left in the furnace for about 30 minutes, in order to obtain the same fire protection capability as the penetration for power cables. There is a possibility that the main focus of the test is that the pipe is not deformed or ignited on the fire side and the opposite side by natural cooling. For this reason, it is more likely that the Japanese test will be stricter than the US test.

When the above-mentioned fire protection structure known overseas is subjected to a fire resistance evaluation test waiting for such natural cooling, the residual heat (the temperature inside the furnace after heating for 2 hours is 400 ° C. or more even after 30 minutes) It was confirmed that ignition and deformation of the pipe were found on the side opposite to the fire.

The present invention has been made in view of the above circumstances, and even if it is tested by a fire resistance rating test method that may be established in Japan, deformation or ignition of the pipe does not occur on the side opposite to the fire. It is an object of the present invention to provide a fireproof structure, particularly when the long body is a large diameter plastic pipe.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the fireproof structure of the penetration portion of the elongated fireproof compartment of the present invention, as shown in FIG. 1, the heat-expandable refractory material 5 is arranged on one side of the through hole 2, and A spacer 16 formed of a heat insulating material having heat resistance is provided at the other end of the through hole 2 so as to surround the elongated body 3. Here, the one side of the through hole 2 includes one end of the through hole 2 and the outside thereof. The other end of the penetrating part 2 means a part of the penetrating part 2 opposite to the one end. Examples of the heat-resistant heat insulating material forming the spacer 16 include glass fiber and rock wool. The height of the spacer 16 is preferably about 30 to 50 mm.

[0008]

[Action]

 In the fireproof structure of the present invention, since the spacer 16 is provided as described above, the long body 3 burns from one side due to a fire, and the heat gradually increases from the other end of the long body 3. When the heat is transmitted to the side, heat is absorbed by the spacer 16 in the portion surrounded by the spacer 16 and the temperature rise of the portion beyond this portion is suppressed.

[0009]

【Example】

 (Embodiment 1) FIGS. 1 and 2 show a fireproof structure of the present embodiment. This fireproof structure is installed in the through hole 2 of the floor 1 through which the large diameter plastic pipe 3 is passed. A sleeve member 4 is inserted in a gap between these plastic pipes (hereinafter abbreviated as pipes) 3 and the floor 1 so as to surround the pipes 3. A thermally expansive refractory material 5 and a spacer 16 are arranged between the sleeve member 4 and the pipe 3.

As shown in FIG. 3, the sleeve member 4 is provided with a cylindrical housing portion 10 on one end side and a ring-shaped collar portion 11 on the other end side, and a column 12 is provided between them. It is connected. The housing portion 10 of the sleeve member 4 is a portion for housing the heat-expandable refractory material 5, and a stopper portion 6 is formed at the lower end thereof so as to project toward the pipe 3. The stopper portion 6 is provided to prevent the heat-expandable refractory material 5 from expanding outward from one end of the sleeve member 4 and to direct the expansion direction mainly toward the other end of the sleeve member 4. . On the upper surface side of the collar portion 11, a claw 13 for preventing the spacer 16 described later from floating is provided. The claw 13 is rotatably provided so as to be released outside the sleeve member 4 as needed. The columns 12 have a length of about 50 mm, are provided at intervals in the circumferential direction of the sleeve member 4, and a window 15 is provided between them. The sleeve member 4 configured in this way has a half-split structure that can be divided into left and right parts.

The spacer 16 is made of rock wool having a height of 30 mm, and is arranged so as to surround the pipe 3 on the other end side of the sleeve member 4. The spacer 16 is provided so as to be in close contact with the pipe 3.

In order to construct this fireproof structure, after the spacers 16 are attached to the pipes 3 on the floor 1, the sleeve member 4 in the half-divided state with the thermally expansive refractory material 5 attached thereto surrounds the pipes 3. assemble. Then, as shown in FIG. 4, the claws 13 of the sleeve member 4 are rotated so as to project inward, and the spacer 16 is held down. After that, the thus assembled one is dropped into the through hole 2 as shown in FIG. Then, the collar portion 11 of the sleeve member 4 hits the upper surface of the floor 1, and the sleeve member 4 is set at a predetermined position.

According to the fireproof structure of this embodiment, when a fire occurs under the floor 1 and the pipe 3 is burned from the bottom and reaches the location where the heat-expandable refractory material 5 is arranged, The pipe 3 in which the refractory material 5 expands and is softened by heat is crushed to extinguish the combustion of the pipe 3. During this time, heat is conducted to the upper side of the pipe 3, but in this fireproof structure, since the spacer 16 made of rock wool is provided at the other end of the through hole 2, the pipe provided at the portion where the spacer 16 is provided. The heat of 3 is transmitted to the spacer 16 and the temperature rise of the pipe 3 is suppressed. As a result, as shown in FIG. 5, thermal deformation of the pipe 3 can be prevented from proceeding upward from the position surrounded by the spacer 16. Therefore, according to the fireproof structure of this embodiment, it is possible to prevent the deformation and ignition of the pipe on the side opposite to the fire.

Further, in the fireproof structure of the present embodiment, since the spacer 16 is provided as described above, the upward expansion of the heat-expandable refractory material 5 is blocked by the spacer 16 and the heat-expandable fireproof material 5 is prevented. Since the expansion pressure of 1 is concentrated on the pipe 3, there is an advantage that the pipe 3 can be effectively crushed and closed at the time of a fire, and the amount of expensive heat-expandable refractory material 5 used can be reduced.

Further, in the fireproof structure of the present embodiment, as shown in FIG. 3, since the window 15 is provided in the sleeve member 4, the heat-expandable refractory material 5 expands from the window 15 at the time of fire. Reach the floor 1 and close the through hole 2 without any gap.

Example 2 FIG. 6 is a cross-sectional view showing a fireproof structure of this example. In the sleeve member 4 used in the fireproof structure of this embodiment, the housing portion 10 and the collar portion 11 are separate bodies. As shown in FIG. 7, the housing portion 10 is configured so that it can be divided into two half members 26, 26. The half grooves 26 are provided at their ends with staggered insertion grooves 17, and the other end 18 is fitted into the mating insertion groove 17 so that they can be integrated. A locking piece 19 that projects obliquely upward is provided on the upper edge of the housing portion 10. As shown in FIG. 8, the collar portion 11 is formed by projecting tongue pieces 21 at two locations on the ring-shaped portion 20. The inner diameter of the ring-shaped portion 20 of the collar portion 11 is smaller than the inner diameter of the through hole 2 of the floor 1, and the inner peripheral portion of the ring-shaped portion 20 is the same as the claw 13 of the first embodiment. It is designed to suppress 16. The collar portion 11 can be divided into right and left portions by a ring-shaped portion 20.

When constructing the fireproof structure of this embodiment, a sleeve 4 having a heat-expandable refractory material 5 attached is assembled on the floor 1 so as to surround the pipe 3, and the pipe 4 is slid along the pipe 3. As shown in FIG. 6, the lower part of the sleeve member 4 is pushed into the through hole 2 until it protrudes from the lower surface of the floor 1 by 30 to 50 mm. Then, the locking member 19 of the sleeve member 4 is locked to the wall surface of the through hole 2 and fixed to the floor 1. Next, a half spacer 16 is wound around the pipe 3 by tape winding and attached, and then is slid downward to fit in the upper end portion of the through hole 2. After this, the collar portion 11 is bolted to the floor 1.

The fireproof structure of the present embodiment can also obtain the same operational effect as the fireproof structure of the first embodiment.

[0019]

[Effect of device]

 According to the fireproof structure of the present invention having the above-mentioned configuration, a fire occurs on one side partitioned by the fireproof partitioning body 1, the elongated body 3 burns from one end side thereof, and this combustion causes thermal expansion. When it reaches the location where the refractory material 5 is arranged, the refractory material 5 expands and crushes the heat-softened elongated body 3 to extinguish the combustion of the elongated body 3. During this time, heat is transmitted to the other end of the elongated body 3, but since the spacer 16 is provided at the other end of the through hole 2 in this fireproof structure, the length at the portion where the spacer 16 is provided is long. The heat of the elongated body 3 is transmitted to the spacers 16 and the temperature rise of the elongated body 3 is suppressed. As a result, the thermal deformation of the elongated body 3 can be prevented from proceeding to the other end side from the location surrounded by the spacer 16. Therefore, according to the fireproof structure of the present invention, it is possible to surely prevent the elongated body 3 on the side opposite to the fire from being deformed or ignited. Further, in the fireproof structure of the present invention, since the spacer 16 is provided, the expansion of the heat-expandable refractory material 5 to the other side is blocked by the spacer 16, and the expansion pressure of the heat-expandable refractory material 5 is increased to the elongated body 3. Since they are concentrated, the long body 3 can be effectively crushed and closed in the event of a fire, and the amount of expensive thermal expansion refractory material 5 used can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a fire protection structure according to a first embodiment in a partial cross-section.

FIG. 2 is a sectional view showing a fireproof structure of the first embodiment.

FIG. 3 is a perspective view showing a sleeve member used in the fire protection structure of the first embodiment.

FIG. 4 is a plan view showing the fire protection structure of the first embodiment as viewed from above.

FIG. 5 is a schematic cross-sectional view showing a state in which spread of fire is prevented by the fireproof structure of the first embodiment.

FIG. 6 is a cross-sectional view showing a fireproof structure of Example 2.

FIG. 7 is a perspective view showing a sleeve member used in the fire protection structure of the second embodiment.

FIG. 8 is a plan view showing the fire protection structure of the second embodiment as viewed from above.

FIG. 9 is a sectional view showing a conventional fireproof structure.

FIG. 10 is a cross-sectional view showing a state in which spread of fire is prevented by the conventional fire protection structure.

[Explanation of symbols]

 1 Fireproof partition (floor) 2 Through hole 3 Long body (large diameter plastic pipe) 4 Sleeve member 5 Thermally expandable fire resistant material 6 Stopper part 7 Pipe 8 Cover 10 Housing part 11 Collar part 12 Strut 13 Claw 15 Window part 16 spacer 17 insertion groove 18 other end 19 locking piece 20 ring-shaped portion 21 tongue piece 26 half member

Claims (1)

[Scope of utility model registration request] 1. A fireproof compartment (1) having a through hole (2), and an elongated body (3) passed through the through hole (2).
And a cylindrical sleeve member (4) inserted into the gap between the through hole (2) and the elongated body (3) so as to surround the elongated body.
And the elongated body (3) on the inner circumference of the sleeve member (4).
A heat-expandable fireproof material (5) arranged so as to surround the heat-expandable fireproof material (5), wherein the heat-expandable fireproof material (5) is one of the through holes (2). And a spacer (16) formed of a heat insulating material having heat resistance at the other end of the through hole (2) so as to surround the elongated body (3). The fireproof structure of the long section of the fireproof partition.