JPH0755066A - Fireproofing constructing method for piping penetrating part and fireproofing device - Google Patents

Abstract

PURPOSE:To provide a fireproofing constructing method for a piping penetrating part capable of being extremely easily handled, and having the excellent fireproof performance. CONSTITUTION:A piping 3 is pulled up from a penetration 2 bored on a floor 1, and thermal expansive heat insulating putty 4 is so applied as to fill in the vallay part formed on the front surface, after that, thermal expansive heat insulating material is wound. Next, four hooks 10 are arranged on the inner periphery of the penetration 2 at the distance of 90, and then the piping 3 is pushed down and the thermal expansive heat insulating material 5 is inserted into the partition 2, so as to be brought in contact with a claw on the lower part of the hook 10. Lastly, the thermal expansive heat insulating putty 4 is so applied as to cover the upper and lower surfaces of the thermal heat insulating material 5, thus the construction is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproofing method and a fireproofing device for a pipe penetrating portion, and more particularly to a fireproofing device having improved fireproofing performance and easy handling.

[0002]

2. Description of the Related Art In relatively large structures such as buildings and factories, partition members such as walls and floors are formed of fireproof slabs in order to prevent the spread of fire inside the structures. However,
Even in a building where such fire spread prevention measures are taken, various pipes and cables are laid through through holes formed in the partition member in order to perform water supply / drainage and power supply. Therefore, in order to completely prevent the spread of fire, it is important to take fire prevention measures at the penetrations of these pipes and cables.
Conventionally, as fire prevention measures in the penetration part of the metal pipe,
A common method is to fill cement mortar in the gap between the through hole and the pipe. Cement mortar is a mixture of cement and sand and kneaded with water, and has sufficient strength and fire resistance depending on the type of cement. When the cement mortar is filled, the work vehicle fills the gap with a trowel or the like.

[0003]

However, such conventional fire protection measures also have the following problems. As described above, cement mortar is one in which cement and sand are mixed and kneaded with water, so that handling at the construction site is not easy. In particular, when the cement mortar has a low viscosity when it is used in a penetration part of a floor, it may fall below the floor. Therefore, it is necessary to prevent the drop by providing a contact plate below the through hole and setting the viscosity and the degree of adhesion strictly. Also, cement mortar shrinks during drying,
Cracks and gaps often occur due to secular change, vibration, shock, etc. Therefore, at the time of fire, flames and smoke may pass through the cracks and gaps and flow out to the adjacent compartments, which may make it meaningless to use the refractory slab.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, to provide a fire protection method for a pipe penetration portion and a fire protection device which are extremely easy to handle and have excellent fire protection performance. .

[0005]

To achieve the above object, a method of fireproofing a pipe penetration portion of the present invention is a process of winding a heat-expandable heat insulating material around an outer circumference of a metal pipe, and the heat-expandable heat insulating material. Is inserted into a through hole formed in the partition member.

Further, the fire prevention device for the pipe penetration portion of the present invention is
A fire protection device formed in a penetrating portion of a metal pipe in a partition member, wherein a thermally expansive heat insulating material is formed in a gap between the through hole of the partition member and the pipe.

[0007]

According to the present invention, the worker winds the heat-expandable heat insulating material around the outer periphery of the pipe at the construction site and then inserts it into the through hole. When a fire occurs on one side of the partition member after construction, the heat-expandable heat insulating material expands to completely close the gap with the pipe and prevent the temperature rise on the other side of the partition member.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fireproofing method for a pipe penetration portion and a fireproofing device according to the present invention will be described below with reference to the accompanying drawings. In this embodiment, a pipe is laid through the floor, which is a partition member, through the procedure shown in FIGS. 1 to 3. First, as shown in FIG. 1, a floor (in this embodiment,
A through-hole (a hole diameter of 259 mm in this embodiment) formed in a 100 mm thick precast concrete plate 1
The pipe (corrugated steel pipe having an outer diameter of 200.3 mm in this embodiment) 3 is pulled upward, and the heat-expandable heat-insulating putty 4 is applied so as to fill the valley portion formed on the surface. Wind the heat insulating material 5. The pipe 3 of this embodiment is shown in FIG.
As shown in FIG. 4, after wrapping the reinforcing stainless tape 7 around the outer periphery of the hard crosslinked polyethylene pipe 6, the corrugated stainless steel pipe (hereinafter, corrugated steel pipe) 9 is sheathed through the foamed polyurethane 8 which is a heat insulating material. It was done. Further, in this example, as the heat-expandable heat insulating material 5, a ceramic fiber-based composite material with a thickness of 5.4 mm cut into a width of 100 mm was used, and was wound around the pipe 3 in six layers. Therefore, the wrapping outer diameter of the heat-expandable heat insulating material 5 is about 265 mm, and the radius is about 3 mm larger than the diameter of the through hole 2.

Next, as shown in FIG. 2, four hooks 10 made of a steel plate, which are fall-out preventing means, are arranged at 90 ° intervals on the inner circumference of the through hole 2. As shown in FIG. 5, the hook 10 has a Z-shape having upper and lower claws 11 and 12 bent in opposite directions, and the upper claw 11 is locked to the upper surface of the floor 1. In this embodiment, the height of the hook 10 (indicated by 1 in FIG. 5) is set to 100 mm.

After the arrangement of the hook 10 is completed, next, as shown in FIG.
As shown in FIG.
Is inserted into the through hole 2 and brought into contact with the lower claw 12 of the hook 10. Then, as shown in FIGS. 6 and 7, the upper and lower surfaces of the heat-expandable heat insulating material 5 are flush with the upper and lower surfaces of the floor 1. As described above, the winding outer diameter of the heat-expandable heat insulating material 5 is equal to the through hole 2
Since it is larger than the hole diameter, the iron spatula or the like is used for the pushing operation, while the thermally expansive heat insulating material 5 is firmly fixed to the inner wall of the through hole 2 after the insertion. After the insertion of the heat-expandable heat insulating material 5, as shown in FIG. 7, the heat-expandable heat insulating putty 4 is applied so as to cover the upper and lower surfaces of the heat expandable heat insulating material 5. Finally, as shown in FIG. 3, the pipe 3 is fixed to the support beam 14 arranged below the floor 1 by using the clamp 13.
Complete construction of fire protection equipment.

Next, the operation of this embodiment at the time of fire will be described. In this embodiment, when a fire occurs in the lower part of the floor 1, the penetration part of the pipe 3 is exposed to extremely high temperature. Then,
As shown in FIG. 8, the thermally expandable heat insulating putty 4 and the thermally expandable heat insulating material 5 expand. The heat-expandable heat insulating putty 4 of this embodiment starts expanding at about 170 degrees, and the heat expandable heat insulating material 5 also starts expanding at about 350 degrees. Therefore, the upper and lower sides of the through hole 2 are thickly covered by the expanded thermally expandable heat insulating putty 4, while the space between the through hole 2 and the pipe 3 is tightly sealed by the expanded thermally expandable heat insulating material 5. As a result, the flame and smoke flow through the through holes 2 is completely blocked, and the spread of fire is prevented. Since the lower surface of the heat-expandable heat insulating material 5 is covered with the heat-expandable heat insulating putty 4, even in the initial stage of a fire in which the heat expandable heat insulating putty 4 and the heat expandable heat insulating material 5 do not start expanding, The penetrations are blocked, completely blocking the passage of smoke from the fire.

The present inventors have made
A fire resistance test was conducted under the floor 1 by raising the temperature from 700 degrees to 1000 degrees over a period of about 2 hours. Then floor 1
In the lower part of the above, the surface temperature of the corrugated steel pipe 9 that was packaged increased sharply, and the foamed polyurethane 8 and the polyethylene pipe 6 inside were carbonized. However, in the upper part of the floor 1, no flame or smoke leaks in the outer peripheral part of the pipe 3, the surface temperature of the stainless steel pipe 9 with corrugated stainless steel stops at about 360 degrees, and the internal polyethylene pipe 6 changes little. I couldn't see it. In addition, in this test, a part of the heat-expandable heat-insulating putty 4 at the bottom was ashed, but no ignition or the like occurred. It should be noted that substantially the same result was obtained when a fire resistance performance test was conducted to raise the temperature above the floor 1.

FIG. 9 shows an example in which a pipe is laid through a wall. As shown in this figure, when the pipe 3 is laid through the wall 15 as well, the same steps as in the case of the floor 1 are taken to carry out fire prevention. However, unlike the case of the floor 1, it is not necessary to prevent the pipe 3 from falling, so that the hook 10 that is a fall prevention unit is not necessary.

Although the description of the specific embodiment has been completed, the embodiment of the present invention is not limited to this embodiment. For example,
The present invention can be applied to pipes having various outer diameters and structures, and the width and axial dimension of the heat-expandable heat insulating material may be changed as appropriate. Further, the thermally expansive heat insulating material is not limited to the ceramic fiber-based composite material, and a flame-retardant rubber-based composite material or the like may be used.

[0015]

As is apparent from the above description, according to the present invention, since the worker alternately winds the heat-expandable heat insulating material around the outer periphery of the pipe at the construction site, the conventional cement mortar can be used. There is no danger of falling, and fire protection becomes extremely easy. In addition, when a fire occurs on one side of the partition member after the construction, the thermally expansive heat insulating material 5 that is expanded between the through hole and the pipe tightly seals it, so that flames or smoke passing through the through hole can be prevented. The distribution is completely cut off and the spread of fire is prevented. Further, in the case where the end surface of the wound heat-expandable heat insulating material is coated with the heat-expandable heat-insulating putty, the heat-expandable heat-insulating putty and the heat-expandable heat-insulating material do not start expanding at the initial stage of a fire. However, the penetration is blocked, and the smoke generated at the fire source is completely blocked.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a first step in one embodiment in which the present invention is applied to a fireproofing treatment for a pipe penetrating a floor.

FIG. 2 is an explanatory diagram showing a second step in the same example.

FIG. 3 is an explanatory diagram showing a third step in the example.

FIG. 4 is a half-cut sectional view showing a pipe in the example.

FIG. 5 is a perspective view showing a hook which is a fall prevention unit in the embodiment.

FIG. 6 is a plan view showing a pipe penetrating portion after fire prevention treatment in the embodiment.

FIG. 7 is a longitudinal sectional view of the same.

FIG. 8 is an explanatory view showing the operation of the same embodiment.

FIG. 9 is a vertical cross-sectional view showing an embodiment in which the present invention is applied to fire protection of a pipe penetrating a wall.

[Explanation of symbols]

 1 Floor 2 Through Hole 3 Piping 4 Thermal Expansion Insulation Putty 5 Thermal Expansion Insulation Material 6 Hard Crosslinked Polyethylene Pipe 7 Stainless Tape 8 Foamed Polyurethane 9 Corrugated Stainless Steel Pipe 10 Hook 15 Wall

Claims (6)

[Claims] 1. A step of winding a thermally expansive heat insulating material around an outer circumference of a metal pipe, and a step of inserting the thermally expansive heat insulating material into a through hole formed in a partition member. Fire protection method for pipe penetrations. 2. A step of applying a heat-expandable heat insulating putty to the outer periphery of the pipe prior to the step of winding the heat-expandable heat insulating material, and a heat expandable heat insulating putty on the end surface of the wound heat expandable heat insulating material. And a step of applying.
Fire protection method for the pipe penetration part described. 3. The method for fire protection of a pipe penetration portion according to claim 1, wherein the winding outer diameter is larger than the inner diameter of the through hole when winding the heat-expandable heat insulating material. 4. A fire protection device formed in a penetrating portion of a metal pipe in a partition member, wherein a thermally expansive heat insulating material is formed in a gap between the through hole of the partition member and the pipe. Fire protection device for the pipe penetration. 5. The fire protection device for a pipe penetration portion according to claim 4, wherein the pipe is a corrugated steel pipe. 6. A fire preventive device for a pipe penetration part according to claim 4, wherein a drop-out preventing means for the thermally expansive heat insulating material is attached to the penetration part.