JPH0241418Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Background and Purpose of the Invention] The present invention relates to a fireproof structure for a portion where pipes such as water supply and drainage pipes and electric wires penetrate walls.

When a fire breaks out in a building, electrical wires, cables, and new building materials that are covered with polyethylene, polyvinyl chloride, etc. that are wired in the area burn with great force, producing hydrogen chloride, carbon monoxide, Smoke containing large amounts of toxic gases such as carbon dioxide is generated. In order to minimize the risk of fires, structures are becoming more and more popular year by year, in which floors and walls are made into small compartments with fireproof construction, and the penetrations of electrical wires, cables, pipes, metal ducts, etc. that pass through these floors and walls are sealed against fire. .

The gap between the wall and the pipe where a water supply/drainage pipe penetrates the floor or wall should be sealed with a fireproof seal using mortar, fireproof board, fireproof putty, non-combustible mineral fiber, etc. alone or in combination. It is common that

However, water supply and drainage pipes are susceptible to thermal expansion and contraction or vibration, and have the drawback that cracks, deformation, and falling-off occur at the fireproof seal portion. Therefore, it is difficult to maintain the original fire protection function for a long period of time.

Therefore, the purpose of this invention is to eliminate the conventional drawbacks,
The purpose of the present invention is to provide a structure for fireproof sealing the periphery of a pipe penetrating a partition wall including a fireproof division without being affected by thermal expansion/contraction and vibration.

[Summary of the idea]

The present invention has a fireproof structure in which pipe penetrations in floors and walls are double-sealed with fireproofing material, and a fire spread preventive agent is applied to the surface of the fireproofing material to prevent it from coming into contact with the pipes.
In other words, the present invention has a structure in which a pipe passes through a hole provided in a wall, and the gap between the pipe and the wall is filled with a first refractory material to prevent fire from spreading on surfaces other than the contact surface of the refractory material with the pipe. An inhibitor is applied, and a second refractory material is provided around the tube to cover the joint surface between the first refractory material and the tube, and a fire spread inhibitor is applied to the exposed surface of the tube to prevent any spread of fire. This is a fireproof structure for pipe penetration parts, characterized in that the inhibitor is applied so as not to come into contact with the pipes.

The fire spread preventive agent applied to the surface of the refractory material does not come into contact with the pipe, so even if the pipe undergoes thermal expansion and contraction or vibration during a fire, the fire spread preventive agent layer will maintain its original shape and will not deform for a long period of time. Ensures a reliable fire seal throughout.

〔Example〕

Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a sectional view and a front view of an embodiment of the present invention. A rectangular first refractory material 3 (thickness 25 to 100 mm, density 100 to
It is filled with 250 kg/m ³ of flat rock wool heat insulating material, and the fire spread preventive agent 4 is evenly applied to its surface and the contact surface with the wall 1. Further tube 2
A second fireproof material 5 (a rock wool insulation cylinder having a thickness of 25 to 100 mm and a density of 60 to 250 Kg/m ³ ) is provided around the , and a fire spread preventive agent 4 is also applied to the surface thereof. However, in order to prevent the fire spread preventive agent 4 from coming into contact with the pipe 2, the 5-10 mm portion of the refractory materials 3 and 5 on the pipe side is not coated, and the fire retardant material 4 is not applied to the surface where the refractory materials 3 and 5 are in contact with the pipe 2. Not coated. However, fireproof material 3,5
If it is difficult to leave the 5 to 10 mm part of the pipe side without fire spread inhibitor, use fireproof material 3, 5.
A release sheet or release agent 6 is placed on the surface of the tube 2 in contact with the
or after coating and drying the fire spread preventive material 4, the end portion that contacts the pipe 2 is cut and peeled off using a cutter or the like to prevent the fire spread preventive material 4 from coming into contact with the pipe 2.

With such a configuration, even if the water supply and drainage pipe undergoes thermal expansion and contraction or is subjected to vibration, the fireproof seal portion does not deform, so reliable fire protection can be guaranteed.

FIG. 2 shows another embodiment in which sealing is carried out in a part of the wall 1, and the first refractory material 3 is thinner than the wall thickness and consists of two plates. A fire spread preventive agent 4 is applied to all surfaces of the refractory materials 3 and 5 except for the surfaces in contact with the tube 2 so that they do not come into contact with the tube 2. When the wall thickness is large, it is not necessary to make the thickness of the first fireproof material 3 and the wall 1 equal, and if a portion of the through hole is sealed, a fire prevention effect can be achieved, leading to savings in materials and space.

FIG. 3 also shows another embodiment, in which the first refractory material 3 is divided into two pieces so as to close both ends of the through hole, and a space 7 is provided between the first refractory materials 3. It is. In this case, the fire spread preventive agent 4 is applied to all surfaces of the refractory materials 3 and 5 other than the surfaces in contact with the tube 2 and the surfaces facing each other via the space 7 so as not to come into contact with the tube 2. By providing the space 7 in the through hole in this way, material can be saved and there is a heat insulation effect.

Three embodiments of the present invention have been described above, and the present invention seals not only the through-hole in the wall but also the portion where the pipe passes through the ceiling or floor.
Also, it is not limited to the penetration part of water supply and drainage pipes,
It can also be applied to areas penetrated by hot water pipes, oil supply and drainage pipes, gas pipes, steel materials, electric wires, etc.

[Effect of idea]

In the fireproof structure of this invention, a fire spread preventive agent is applied to the surface of the fireproof material so that it does not come into contact with the pipe, so even if the pipe undergoes thermal expansion and contraction or vibration, the fire spread preventive agent will not be affected. can maintain its original shape. Therefore, cracks and the like do not occur, and reliable smoke and fire prevention functions can be guaranteed for a long period of time. Furthermore, since the refractory material can be formed into a predetermined shape in advance, it is easy to work with and does not generate dust.

[Brief explanation of the drawing]

Figures 1 to 3 show examples of the present invention; Figure 1 is a cross-sectional view of the wall and refractory material having the same thickness;
FIG. 2 is a cross-sectional view of a through-hole with a portion sealed, and FIG. 3 is a cross-sectional view of a through-hole with only both ends sealed. Codes in the diagram: 1... Wall, 2... Water supply and drainage pipe, 3...
First fireproof material, 4... Fire spread prevention agent, 5... Second fireproof material, 6... Release sheet or release agent, 7...
space.

Claims (1)

[Scope of utility model registration request] In a structure in which a pipe passes through a hole provided in a wall, a first refractory material is filled in the gap between the pipe and the wall, and a fire spread preventive agent is applied to the surface of the refractory material other than the surface in contact with the pipe. Furthermore, a second refractory material is provided around the tube so as to cover the joint surface between the first refractory material and the tube, and a fire spread preventive agent is applied to the exposed surface of the second refractory material, and all the fire spread preventive agent is applied to the tube. A fireproof structure for a pipe penetration part characterized by being coated to prevent contact between the pipes.