Fireproof section penetrating member and fireproof section member

Abstract

To provide a fireproof section penetrating member which efficiently prevents fire from spreading.SOLUTION: A fireproof section penetrating member 16 includes a pipe material 17 containing thermally expandable graphite, a first lid 22A covering an opening 17b formed in a first end part 17a of the pipe material 17, and a second lid 22B covering an opening 17d formed in a second end part 17c of the pipe material 17.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fireproof compartment penetration treatment member and a fireproof compartment material. [Background technology]

[0002] Conventionally, buildings are provided with fire compartments such as floors, walls, etc. The fire compartments prevent the spread of fire in the building in the event of a fire. In order to pass inserts such as cables and pipes through the fire compartment material, a fire compartment penetration part (through hole) may be provided in the fire compartment material. In order to suppress the spread of fire through the fire compartment penetration part, a fire compartment penetration treatment member is used (for example, see Patent Document 1).

[0003] In Patent Document 1, the fire compartment penetration processing member includes an insertion member (pipe), a locking member, and a covering portion. The inserting member is formed in a sleeve shape or can be deformed into a sleeve shape. The inserting member is inserted into the fire compartment penetration. The locking member is arranged in contact with one end side of the inserting member. The locking member fixes the position of the inserting member. The covering portion covers the gap between the opening of the fire compartment penetration and the inserting body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-145868 Summary of the Invention [Problem to be solved by the invention]

[0005] However, there is room for improvement in the fire spread suppression performance of the fire compartment penetration treatment member of Patent Document 1.

[0006] The present invention has been made in consideration of such problems, and aims to provide a fire compartment penetration treatment element that efficiently prevents a fire from spreading, and a fire compartment material equipped with this fire compartment penetration treatment element. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention proposes the following means. (1) Aspect 1 of the present invention is a fire compartment penetration treatment component comprising a pipe material containing thermally expandable graphite, a first lid covering an opening formed at a first end of the pipe material, and a second lid covering an opening formed at a second end of the pipe material.

[0008] In this invention, for example, appropriate cover holes are formed in the first and second covers, and the fire compartment penetration processing member is placed in the penetration hole of the fire compartment material. The inserter is passed through the cover holes of the first and second covers. For example, if a fire occurs on the first side of the fire compartment material, the fire compartment material heats up and the thermally expandable graphite contained in the pipe material expands, sealing the gap between the first and second covers, between the opening periphery of the through hole in the fire compartment material and the insert. Therefore, air is less likely to flow through this gap, preventing flames and heat from the fire from reaching the second side of the fire compartment material through the through holes in the fire compartment material, and effectively preventing the fire from spreading.

[0009] (2) A second aspect of the present invention may be a fireproof compartment penetration treatment component according to (1), which comprises a plurality of filler pieces arranged in a circumferential direction inside the pipe material. In this invention, for example, by opening cover holes in the first and second covers at portions on the axis of the pipe material, and placing the insert through the cover hole on the axis of the pipe material, multiple filler pieces are then arranged inside the pipe material so as to surround the insert from the outside in the radial direction, and the multiple filler pieces are compressed in the radial direction, thereby increasing the density of the multiple filler pieces and improving the fire resistance of the multiple filler pieces.

[0010] (3) Aspect 3 of the present invention may be a fire compartment penetration treatment component as described in (1) or (2), in which the first cover has a first sealing wall arranged to face the end face of the first end side of the pipe material, and the first sealing wall has a weak portion that is weaker in strength than other portions of the first sealing wall and is formed in a ring shape when viewed in the axial direction of the pipe material, and the ratio of the area within the outer peripheral edge of the weak portion to the area within the outer peripheral surface of the pipe material when viewed in the axial direction may be 32% or less. If the insert is an electrical wiring, the internal wiring regulations stipulate that the ratio of the cross-sectional area of ​​the electrical wiring to the cross-sectional area of ​​the penetration hole in the fire compartment material must be 32% or less. In this invention, the area of ​​the outer peripheral surface of the pipe material when viewed in the axial direction is slightly narrower than the cross-sectional area of ​​the through hole in the fire compartment material. When the first sealing wall of the first cover is broken at the weak portion to form a cover hole in the first sealing wall, the area of ​​this cover hole is 32% of the area of ​​the outer peripheral surface of the pipe material. Therefore, by passing electrical wiring through the cover hole to an extent that it fits, it is possible to comply with interior wiring regulations without measuring the cross-sectional area of ​​the electrical wiring.

[0011] (4) A fourth aspect of the present invention is a fire compartment material comprising a fire-resistant member having a through hole formed therein and a fire compartment penetration treatment member according to any one of (1) to (3), at least a portion of which is disposed within the through hole. According to the present invention, a fire compartment material can be constructed by including a fire compartment penetration treatment member that efficiently prevents a fire from spreading, and a fire-resistant member. [Effects of the Invention]

[0012] The fireproof compartment penetration treatment member and fireproof compartment material of the present invention can prevent a fire from spreading. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a cross-sectional view of a building having a fire compartment material according to one embodiment of the present invention as a floor, as viewed from the front. [Figure 2] FIG. 2 is a plan view of a fireproof compartment penetration treatment member provided in the fireproof compartment material. [Figure 3] FIG. 2 is a cross-sectional view taken along the line A1-A1 in FIG. [Figure 4] 10 is a cross-sectional view of a main part of the fire compartment penetration processing member when no penetrating body is inserted. FIG. [Figure 5] 10 is a cross-sectional view illustrating a method for installing the fire compartment penetration treatment member. FIG. [Figure 6] 10 is a cross-sectional view illustrating a method for installing the fire compartment penetration treatment member. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, a first embodiment of a fire compartment penetration processing member and a fire compartment material according to the present invention will be described with reference to Figs. 1 to 6, taking as an example a case where the fire compartment material is a floor. As shown in Fig. 1, a floor 10 of this embodiment is used in a building 1. The configuration of the building 1 is not limited as long as it includes the floor 10. For example, the building 1 includes columns and beams (not shown) and the floor 10. The pillars are made of reinforced concrete, etc. The pillars extend upward from foundations (not shown). The beam is made of H-shaped steel or the like and extends along a horizontal plane. The ends of the beam are connected to the columns.

[0015] The floor 10 includes concrete (fire-resistant member) 11 and a fire compartment penetration treatment member 16 . The concrete 11 is formed in a flat plate shape and is arranged so that the thickness direction of the concrete 11 is along the vertical direction. A through hole 12 is formed in the concrete 11. The through hole 12 passes through the concrete 11 in the vertical direction. The fireproof member is not limited to concrete 11, but may be ALC (Autoclaved Lightweight Aerated Concrete: lightweight aerated concrete cured by high temperature and high pressure steam), calcium silicate board, a hollow floor made of gypsum board, a wooden fireproof floor, etc.

[0016] 1 to 3, the fireproof compartment penetration processing member 16 includes a pipe material 17, a first lid 22A, a second lid 22B, and a plurality of filler pieces 27. Note that Fig. 2 shows the first lid 22A in a state before a lid hole 23cA, which will be described later, is formed. Here, the pipe material 17 is formed in a tubular shape, and the first lid 22A and the second lid 22B are formed in a cylindrical shape with a bottom. The central axes (axial lines) of the pipe material 17, the first lid 22A, and the second lid 22B are arranged coaxially with a common axis. Hereinafter, the common axis will be referred to as the axis line (central axis) O1. The direction perpendicular to the axis line O1 will be referred to as the radial direction, and the direction going around the axis line O1 will be referred to as the circumferential direction. FIG. 2 is a view of the fireproof compartment penetration treatment member 16 when viewed in the direction of the axis O1.

[0017] In this embodiment, the configuration of the first lid 22A and the configuration of the second lid 22B are plane-symmetrical with respect to a reference plane S1 perpendicular to the axis O1. For this reason, the configuration of the first lid 22A is indicated by adding the capital letter "A" to the numeral of the reference symbol. The configuration of the second lid 22B corresponding to the first lid 22A is indicated by adding the capital letter "B" to the same numeral as the numeral of the first lid 22A. This avoids redundant explanation. For example, a first sealing wall 23A (to be described later) of the first lid 22A and a second sealing wall 23B (to be described later) of the second lid 22B are plane-symmetrical with respect to the reference plane S1.

[0018] The pipe material 17 is made of polyvinyl chloride resin, polyethylene resin, polypropylene resin, polybutene resin, or steel pipe. The pipe material 17 may have a single-layer structure in which the entire pipe material 17 is made of a resin composition, or may have a multi-layer structure made of multiple layers. In the case of a multi-layer structure, it is sufficient that any one of the layers is formed from a resin composition. For example, when the pipe material 17 has a three-layer structure consisting of a surface layer, an intermediate layer, and an inner layer, the intermediate layer may be formed from a resin composition, and the surface layer, intermediate layer, and inner layer may contain an endothermic agent.

[0019] As an example, a single-layer structure can be used, which is made of a resin composition containing 1 to 20 parts by weight of thermally expandable graphite per 100 parts by weight of polyvinyl chloride resin. Alternatively, a three-layer structure can be used, which is made of a thermally expandable fire-resistant layer made of a resin composition containing 1 to 20 parts by weight of thermally expandable graphite per 100 parts by weight of polyvinyl chloride resin, and coating layers of a polyvinyl chloride resin composition that does not contain thermally expandable graphite that cover the inner and outer surfaces of the thermally expandable fire-resistant layer.

[0020] When the pipe material 17 has a single-layer structure, if the amount of thermally expandable graphite is less than 1 part by weight, sufficient thermal expansion may not be obtained during combustion, and the desired fire resistance may not be achieved.If the amount exceeds 20 parts by weight, the pipe material may expand too much when heated, and may not be able to maintain its shape, causing residue to fall out of the through hole 12 in the concrete 11, resulting in a decrease in fire resistance.

[0021] When the pipe material 17 has a multi-layer structure, the resin composition containing the thermally expandable fire-resistant material is not particularly limited, but preferably contains 1 to 20 parts by weight of thermally expandable graphite per 100 parts by weight of polyvinyl chloride resin. The content of thermally expandable graphite is more preferably 4 to 18 parts by weight, and even more preferably 6 to 16 parts by weight. Furthermore, if the thermally expandable graphite is present throughout the entire pipe material 17, even if the content of thermally expandable graphite is relatively high at 15 parts by weight or more and the residue is brittle, the residue will block the entire through hole 12, and the residue after thermal expansion will be retained within the concrete 11, making it less likely to fall off.

[0022] When the intermediate layer contains thermally expandable graphite, the intermediate layer is black, so it is preferable that the surface layer and the inner layer contain a colorant other than black so that they can be distinguished from the intermediate layer. The thickness of the surface layer and the inner layer is preferably 0.3 mm to 3.0 mm, and more preferably 0.6 mm to 1.5 mm. If the thickness of the coating layer is 0.3 mm or more, the mechanical strength of the pipe can be sufficiently ensured, and if it is 3.0 mm or less, a decrease in fire resistance can be suppressed. Furthermore, the pipe material 17 preferably satisfies the performance requirements set forth in JIS K6741. That is, if the amount of thermally expandable graphite is less than 1 part by weight, sufficient thermal expansion may not be obtained during combustion, and the desired fire resistance may not be obtained.If the amount of thermally expandable graphite is more than 20 parts by weight, the graphite may expand too much upon heating, and may not be able to maintain its shape, causing residue to fall out of the through holes 12 in the concrete 11, resulting in a decrease in fire resistance.

[0023] The thermally expandable graphite used in this embodiment can be, for example, a crystalline compound obtained by acid treating powder of natural scaly graphite, pyrolytic graphite, kish graphite, or the like with an inorganic acid and a strong oxidizing agent to insert the inorganic acid between the layers of the graphite, and then adjusting the pH. As the inorganic acid, concentrated sulfuric acid, nitric acid, selenic acid, etc. can be used. As the strong oxidizing agent, concentrated nitric acid, perchloric acid, perchlorates, permanganates, dichromates, hydrogen peroxide, etc. can be used.

[0024] By adjusting the pH, it is possible to use thermally expandable graphite which is a crystalline compound that maintains the layered structure of carbon and has a pH adjusted to 1.5 to 7.0, and thermally expandable graphite having a 1.3-fold expansion temperature of 180°C to 280°C.

[0025] If the pH of the thermally expandable graphite is less than 1.5, the acidity is too strong and it is likely to cause corrosion of the molding equipment, and if the pH is more than 7.0, the effect of promoting the carbonization of the polyvinyl chloride resin will be weakened, and sufficient fire resistance may not be achieved. The particle size of the thermally expandable graphite is not particularly limited, but for example, the range of 100 to 400 μm, preferably the range of 120 to 350 μm, can be used.

[0026] The resin composition constituting the pipe material 17 may contain additives such as stabilizers, inorganic fillers, flame retardants, lubricants, processing aids, impact modifiers, heat resistance improvers, antioxidants, light stabilizers, ultraviolet absorbers, pigments, plasticizers, thermoplastic elastomers, etc., as needed, within the scope that does not impair the purpose of this embodiment.

[0027] The pipe material 17 is arranged so that the axis O1 is aligned in the vertical direction. A first opening (opening) 17b is formed at a first end 17a in the axial direction O1 of the pipe 17. A second opening (opening) 17d is formed at a second end 17c of the pipe 17 opposite to the first end 17a in the axial direction O1.

[0028] The first lid 22A has a first sealing wall 23A and a first peripheral wall 24A. The first sealing wall 23A is formed in a flat plate shape. When viewed in the thickness direction of the first sealing wall 23A, the first sealing wall 23A has a circular shape. The first sealing wall 23A is arranged on the axis O1. The first sealing wall 23A is arranged so as to face the end face of the first end 17a side of the pipe 17. "Facing" here does not only mean facing each other with a gap between them, but also means coming into contact with each other. The first sealing wall 23A (first lid 22A) covers the first opening 17b. As shown in Fig. 2, a first weak portion (weak portion) 23aA is formed in the first sealing wall 23A. The first weak portion 23aA is formed in an annular shape when viewed in the direction of the axis O1 shown in Fig. 2. The "annular" here is not limited to a circular outer edge shape, but may also be an elliptical outer edge shape, a polygonal outer edge shape, or the like. The first weak portion 23aA has lower strength than portions (other portions) of the first sealing wall 23A other than the first weak portion 23aA.

[0029] In this example, the first weak portion 23aA is composed of a plurality of small diameter holes 23bA. Each small diameter hole 23bA penetrates the first sealing wall 23A in the direction of the axis O1. It is preferable that two small diameter holes 23bA adjacent to each other in the circumferential direction are not connected to each other. 2, when viewed in the direction of the axis O1, a region R1 within the outer circumferential edge of the first weak portion 23aA is indicated by hatching. The region R1 is preferably disposed on the axis O1. When viewed in the direction of the axis O1, the ratio of the area within the outer circumferential edge of the first weak portion 23aA to the area of ​​the region R1 is 32% or less. The first sealing wall 23A of the first lid 22A is broken at the fragile portion 23aA to form a lid hole 23cA in the first sealing wall 23A, which is indicated by a two-dot chain line in Fig. 2. The lid hole 23cA is formed to have approximately the same size as the region R1.

[0030] The first peripheral wall 24A protrudes in the thickness direction of the first sealing wall 23A from the outer peripheral edge of the first sealing wall 23A around the entire circumference of the first sealing wall 23A. The first peripheral wall 24A covers the first end 17a of the first sealing wall 23A from the radial outside of the first end 17a. The first lid 22A configured as above is fitted onto the first end 17a of the pipe 17. The first sealing wall 23A and the first peripheral wall 24A of the first lid 22A are integrally formed from vinyl chloride resin or the like.

[0031] As shown in FIG. 1, the second lid 22B has a second sealing wall 23B and a second peripheral wall 24B that are configured symmetrically with the first sealing wall 23A and the first peripheral wall 24A of the first lid 22A with respect to a reference plane S1. The second sealing wall 23B is formed with a second weak portion (not shown) that is configured to be plane-symmetrical to the first weak portion 23aA with respect to the reference plane S1. The second sealing wall 23B (second lid 22B) covers the second opening 17d.

[0032] Each filling piece 27 has a bag 28 and a filling material 29 . As shown in Fig. 3, the bag 28 is made of a non-combustible material such as metal foil or glass wool, or a composite material thereof. The filler 29 may be made of a non-combustible material such as rock wool or glass wool, or an organic material such as urethane foam. A non-combustible material is preferred. By configuring (manufacturing) the filling piece 27 in this manner in a factory or the like, the filling material 29 in the bag 28 can be managed. The plurality of filler pieces 27 are arranged in the circumferential direction within the pipe material 17 . 3, a penetrating body 100 having a plurality of electrical wirings 101 is passed on an axis O1 in a fireproof compartment penetration processing member 16. By passing the penetrating body 100 through the pipe material 17, a plurality of filler pieces 27 are arranged so as to surround the penetrating body 100 from the radial outside, and the plurality of filler pieces 27 are compressed in the radial direction.

[0033] When the insert 100 is not inserted into the pipe 17, the plurality of filler pieces 27 are not compressed in the radial direction by the insert 100, as shown in Fig. 4. In this case, it is preferable that the filler 29 has the minimum density that can ensure fire resistance.

[0034] As shown in FIG. 1, the intermediate portion (at least a part) in the axial line O1 direction of the fireproof compartment penetration processing member 16 configured as above is disposed in the through hole 12 of the concrete 11. In this example, the first peripheral wall 24A of the first lid 22A and the second peripheral wall 24B of the second lid 22B sandwich the concrete 11 in the direction of the axis O1. The floor 10 is supported from below by beams.

[0035] Next, a method for installing the fire compartment penetration treatment member 16 configured as above will be described. First, as shown in FIG. 5, a through hole 12 is formed in concrete 11 using a known tool. Next, the first lid 22A and the second lid 22B are removed from the pipe material 17 of the fire compartment penetration processing member 16. The first sealing wall 23A of the first lid 22A is broken at the fragile portion 23aA by, for example, striking the fragile portion 23aA, thereby forming a cover hole 23cA in the first sealing wall 23A. In the same manner, a cover hole 23cA is formed in the second lid 22B.

[0036] 6, the pipe material 17 is passed through the through hole 12 in the concrete 11, and the first lid 22A and the second lid 22B are fitted onto the pipe material 17, thereby placing the fire compartment penetration processing member 16 in the through hole 12 in the floor 10. The penetrating body 100 is passed through the lid holes 23cA of the first lid 22A and the second lid 22B and between the plurality of filler pieces 27.

[0037] For example, if a fire breaks out on the underside (first side) of the floor 10, the floor 10 heats up and the thermally expandable graphite contained in the pipe material 17 expands, sealing the gap between the first lid 22A and the second lid 22B, between the opening periphery of the through hole 12 in the floor 10 and the insert 100. As described above, in the fire compartment penetration treatment member 16 of this embodiment, air is less likely to flow between the opening periphery of the penetration hole 12 in the floor 10 and the insert 100, which prevents flames and heat from a fire from reaching the upper side (second side) of the floor 10 through the penetration hole 12 in the floor 10, thereby efficiently preventing the spread of the fire.

[0038] The fireproof compartment penetration processing member 16 has a plurality of filler pieces 27. For example, by opening cover holes 23cA in the first cover 22A and the second cover 22B on the axis O1, the insert 100 is passed through on the axis O1. Then, in the pipe 17, the plurality of filler pieces 27 are arranged so as to surround the insert 100 from the radial outside, and the plurality of filler pieces 27 are compressed in the radial direction. This increases the density of the plurality of filler pieces 27, thereby improving the fire resistance of the plurality of filler pieces 27. By manufacturing the filler pieces 27 in a factory or the like, the work of filling the filler at the construction site can be omitted, and the density and thickness of the filler can be easily controlled.

[0039] The first lid 22A has a first sealing wall 23A, and when viewed in the direction of the axis O1, the ratio of the area within the outer circumferential edge of the first weak portion 23aA to the area of ​​the region R1 is 32% or less. When the penetrating body 100 is an electric wiring 101, the interior wiring regulations stipulate that the ratio of the cross-sectional area of ​​the electric wiring 101 to the cross-sectional area of ​​the through-hole 12 in the floor 10 must be 32% or less. In this embodiment, the area within the outer peripheral surface of pipe material 17 when viewed in the direction of axis O1 is slightly narrower than the cross-sectional area of ​​through-hole 12 in floor 10. When first sealing wall 23A of first lid 22A is broken at first fragile portion 23aA to form cover hole 23cA in first sealing wall 23A, the area of ​​cover hole 23cA is 32% of the area within the outer peripheral surface of pipe material 17. Therefore, by passing electrical wiring 101 through cover hole 23cA to an extent that it passes through, it is possible to comply with interior wiring regulations without measuring the cross-sectional area of ​​electrical wiring 101.

[0040] Furthermore, the floor 10 of this embodiment can be constructed by including the fire compartment penetration processing member 16, which efficiently prevents the spread of fire, and the concrete 11.

[0041] Although one embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and configuration changes, combinations, deletions, etc. are also included within the scope that does not deviate from the gist of the present invention. For example, in the above embodiment, the first weak portion 23aA is configured by a plurality of small diameter holes 23bA, but the configuration of the first weak portion is not limited to this, and the first weak portion may be configured by being thinner than the portions of the first sealing wall 23A other than the first weak portion, for example. The sealing walls 23A and 23B do not necessarily need to have a weakened portion.

[0042] The fire prevention compartment penetration treatment element 16 does not have to have multiple filler pieces 27. Although the fire compartment material is a floor in the above description, the fire compartment material is not limited to this and may be a wall or the like. The insert is not limited to an electric wire, but may be a pipe or the like. [Explanation of symbols]

[0043] 10 Floor (fire compartment material) 11 Concrete (fireproof material) 16 Fire compartment penetration processing components 17 Piping material 17a First end 17b 1st opening (opening) 17c Second end 17d 2nd opening (opening) 22A Cover 1 22B Cover 2 27 Filling tablets

Claims

1. a pipe material including thermally expandable graphite; a first lid for covering an opening formed at a first end of the tubular member; a second lid for covering an opening formed at a second end of the tubular member; A fire prevention compartment penetration treatment member comprising:

2. The fire prevention compartment penetration treatment element according to claim 1 , further comprising a plurality of filler pieces arranged in a circumferential direction within the pipe material.

3. the first lid has a first sealing wall disposed to face the end surface of the tubular member on the first end side, The first sealing wall has a weak portion having a lower strength than other portions of the first sealing wall, the weak portion being formed in an annular shape when viewed in the axial direction of the pipe material, A fire compartment penetration treatment member according to claim 1 or 2, wherein when viewed in the axial direction, the ratio of the area within the outer edge of the weak portion to the area within the outer surface of the pipe material is 32% or less.

4. a refractory member having a through hole formed therein; The fire prevention compartment penetration processing element according to claim 1 or 2, at least a portion of which is disposed within the through hole; A fire compartment material comprising:

Images