JP6357437B2 - Covering material, piping, and fireproof structure - Google Patents

Description

  The present invention relates to a covering material that covers an outer peripheral surface of a pipe that is inserted into a through-passage of a partition body, a pipe whose outer peripheral surface is covered with the covering material, and a fireproof structure that includes the pipe.

  Conventionally, piping is inserted through a through hole formed in a partition of a building. And when piping is a metal hot-water supply pipe | tube, a refrigerant | coolant pipe | tube, etc., covering the outer periphery of piping with a heat insulating material is performed for heat insulation. For example, in Patent Document 1, for example, glass wool, polyethylene, polyurethane, polypropylene, polyolefin, polystyrene, phenol resin-based, elastomer-based, nitrile rubber-based, vinyl chloride-based foamed materials, etc. are used as the above-mentioned heat insulating material. Is disclosed.

  Conventionally, there has been proposed a technique for preventing a fire from propagating through a through hole of a partition using a thermal expansion agent. The thermal expansion material has, for example, a tape shape, a sheet shape, or a putty shape. Patent Document 2 discloses a fireproof structure of a partition through portion using a thermal expansion sheet or a thermal expansion seal. In Patent Document 2, a protective tube for a cable is passed through a through-passage of a partition body. The protective tube is made of synthetic resin, and one or a plurality of cables are passed through the protective tube. The thermal expansion seal is wound around the root portion of the protective tube extending from the through passage. The thermal expansion sheet is attached to the periphery of the opening of the through passage in the compartment. In Patent Document 2, when a fire occurs, a thermal expansion sheet or a thermal expansion seal expands due to the heat of the fire, thereby filling a gap generated by deformation or burning of the protective tube.

JP 2012-092962 A Japanese Patent No. 4060844

  By the way, when a metal pipe is covered with a heat insulating material as described above, the heat transmitted to the pipe is transmitted through the through-hole when a fire occurs, and the heat insulating material on the side opposite to the side where the fire is generated As a result of fire, there is a risk that the fire may propagate to the opposite compartment through the compartment.

  Further, in Patent Document 2, labor is required for the operation of winding the thermal expansion seal and the operation of attaching the thermal expansion sheet, and the above-described operation may be difficult depending on the opening shape and position of the through passage.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is a covering material that covers an outer peripheral surface of a pipe that is inserted into a through-passage of a partition body, and can easily take fire-proof measures for the through-passage. It is providing the coating | covering material which can be implement | achieved, the piping by which the outer peripheral surface was covered with the said coating | covering material, and a fireproof structure provided with the said piping.

  The covering material which concerns on the 1st viewpoint of this invention is a covering material which covers the outer peripheral surface of piping penetrated by the penetration path of a division body, Comprising: A thermal expansion material is contained.

  Preferably, the range disposed in the through passage has a laminated structure including a thermal expansion layer made of the thermal expansion material, and the innermost layer is composed of the thermal expansion layer, whereby the thermal expansion layer is Contact the piping.

  Preferably, the range arranged in the through passage has a laminated structure including the thermal expansion layer and a heat insulating layer made of a heat insulating material.

  In the pipe according to the second aspect of the present invention, the outer peripheral surface is covered with the covering material.

  A fireproof structure according to a third aspect of the present invention includes a partition having a through passage, a sleeve inserted into the through passage, and a pipe inserted into the sleeve, and within the range of the through passage. The outer peripheral surface of the pipe is covered with a covering material containing a thermal expansion material.

  Preferably, a fireproof sealing material filled between the inner peripheral surface of the sleeve and the outer peripheral surface of the pipe is further provided.

  A fireproof structure according to a fourth aspect of the present invention includes a partition having a through-passage and a pipe inserted through the through-passage, and an outer peripheral surface of the pipe is a thermal expansion material within the range of the through-passage. It is covered with a covering material containing.

  Preferably, it further includes a fireproof sealing material filled between a housing surface of the through passage and an outer peripheral surface of the pipe.

  The fireproof structure according to the third and fourth aspects of the present invention preferably has a laminated structure in which the coating material includes a thermal expansion layer made of the thermal expansion material within the range of the through passage, and the coating material Since the innermost layer is composed of the thermal expansion layer, the thermal expansion layer is in contact with the pipe.

  According to the present invention, by including a thermal expansion material in the covering material, a pipe whose outer peripheral surface is covered with the covering material is prepared, and the through-passage is obtained by a simple operation of inserting the pipe into the through-passage of the partitioning body. A thermal expansion material can be disposed inside. For this reason, it is possible to easily realize fire resistance measures for the through passage.

It is a perspective view which shows the fireproof structure which concerns on embodiment of this invention. It is the sectional view on the aa line of FIG. It is the bb sectional view taken on the line of FIG. It is the cc sectional view taken on the line of FIG. FIG. 5 is a corresponding view of FIG. 4, and is a cross-sectional view showing a modification of the covering material of the present invention. It is a perspective view which shows the fireproof structure which concerns on the modification of this invention. It is the aa sectional view taken on the line of FIG. It is a perspective view which shows the fireproof structure which concerns on the modification of this invention. It is the sectional view on the aa line of FIG.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a fireproof structure 1 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line aa in FIG. 1 and shows a vertical cross section of the refractory structure 1.

  As shown in FIGS. 1 and 2, the fireproof structure 1 according to the present embodiment includes a partition body 2, a cylindrical sleeve 3, a pipe 4, and a fireproof seal material 5.

  The partition body 2 is a hollow wall that partitions the fire protection sections A and A. The partition body 2 includes a pair of wall members 6A and 6B that are arranged at intervals. Each of the pair of wall materials 6A and 6B is made of gypsum board and extends in the vertical direction. A pair of through holes 60A and 60B are formed in the pair of wall members 6A and 6B. These through-holes 60A and 60B and the gap 7 between the wall materials 6A and 6B constitute a through-passage 8 of the partition body 2.

  The sleeve 3 is inserted through the through passage 8 of the partition body 2. As the sleeve 3, a metal-made or heat-expandable fire-resistant sleeve can be used. The metal fireproof sleeve is preferably steel and such sleeves are well known. Examples of the heat-expandable fire-resistant sleeve include a sleeve made of a heat-expandable resin composition containing a resin as a binder or a matrix, heat-expandable graphite, and an inorganic filler, and can be used to form a sleeve. Examples of the fire-resistant sheet include Sekisui Chemical Co., Ltd. Fiblock (registered trademark), a sheet of a thermally expandable resin composition containing epoxy compound or butyl rubber as a resin component, phosphorus compound, thermally expandable graphite, inorganic filler, and the like. Molded product), Sumitomo 3M Fire Barrier (sheet material consisting of a resin composition containing chloroprene rubber and verculite, expansion coefficient: 3 times, thermal conductivity: 0.20 kcal / m · h · ° C.), Mitsui Metal Paint Chemical Co., Ltd. Medhicut (sheet material made of resin composition containing polyurethane resin and thermally expandable graphite, expansion coefficient: 4 , Thermal conductivity: 0.21kcal / m · h · ℃) and the like. In addition, it is preferable that the base material of a refractory sheet uses a nonflammable material. A suitable example is aluminum foil-clad glass cloth (ALGC).

  The pipe 4 is inserted into the sleeve 3. The pipe 4 is a metal pipe used as, for example, a water supply / drain pipe, an intake / exhaust pipe, a water pipe, a gas pipe, a medium transfer pipe for air conditioning.

  The fireproof sealing material 5 is filled between the inner peripheral surface of the sleeve 3 and the outer peripheral surface of the pipe 4. As this fire-resistant sealing material 5, Fibro (manufactured by Sekisui Chemical Co., Ltd., a resin component such as an epoxy resin and a rubber resin, a thermal expansion component such as thermally expandable graphite, a heat containing a phosphorus compound, an inorganic filler, etc. A molded product of an expandable resin composition) or a fire-resistant putty can be used. As this fire-resistant putty, for example, a clay-like filler containing an organic binder such as polybutene and polybutadiene and an inorganic filler such as gypsum, aluminum hydroxide, magnesium hydroxide, a paste-like filler, a thermal expansibility Examples thereof include a clay-like filler or a paste-like filler made of a refractory resin composition. Among them, gypsum, aluminum hydroxide, magnesium hydroxide, etc. show endothermic action when exposed to heat such as fire, and can prevent the pipe 4 from becoming high temperature. It is preferable to use a clay-like filler or a paste-like filler containing magnesium or the like. Further, when a fire-resistant sleeve is used as the sleeve 3, it is possible to prevent the fire-resistant putty from dripping onto the floor between the wall materials 6A and 6B in the event of a fire. A clay-like filler or a paste-like filler made of a thermally expandable refractory resin composition is preferable because it expands when exposed to heat such as a fire and exhibits a heat insulating action. 2 shows an example in which the sealing material 5 extends over the entire width of the sleeve 3, the length and installation position of the sealing material 5 can be arbitrarily set. For example, in the case where the sealing material 5 is formed from a thermally expandable material, the length of the sealing material 5 is limited as long as the gap between the sleeve 3 and the pipe 4 can be filled with the thermally expanded sealing material 5. The installation position can be arbitrarily set. Further, when the sleeve 3 is formed of a thermally expandable material, the sealing material 5 can be omitted.

  The outer peripheral surface of the pipe 4 is covered with a covering material 9 (FIG. 2). The covering material 9 includes a heat insulating material and a thermal expansion material described later. The covering material 9 has a different cross-sectional structure between a portion disposed within the range of the through passage 8 and a portion disposed outside the through passage 8.

  FIG. 3 is a cross-sectional view taken along the line bb in FIG. 1 and shows a cross section outside the through passage 8. The portion of the covering material 9 disposed outside the through-passage 8 is composed of a heat insulating layer 10 made of a heat insulating material. The heat insulating material is, for example, a foam material such as glass wool, polyethylene, or polyurethane.

  FIG. 4 is a cross-sectional view taken along the line cc of FIG. 1 and shows a cross section within the range of the through path 8. As shown in FIG. 4, the portion of the covering material 9 disposed in the through-passage 8 has a structure in which a thermal expansion layer 11 made of a thermal expansion material and a heat insulation layer 10 made of the above-mentioned heat insulation material are laminated. . The innermost layer of the covering material 9 is composed of the thermal expansion layer 11 so that the thermal expansion layer 11 is in contact with the pipe 4.

  The thermal expansion layer 11 is formed from a thermal expansion material having fire resistance. Examples of the heat-expandable material include a heat-expandable resin composition containing a thermoplastic resin as a binder or a matrix, a rubber substance, or a synthetic resin such as a thermosetting resin, heat-expandable graphite, and an inorganic filler.

  Examples of the thermoplastic resin include polypropylene resins, polyethylene resins, polybutene resins, polypentene resins and other polyolefin resins, polystyrene resins, acrylonitrile-butadiene-styrene resins, polycarbonate resins, polyphenylene ether resins, Examples thereof include acrylic resins, polyamide resins, and polyvinyl chloride resins.

  Examples of rubber materials include natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), 1,2-polybutadiene rubber (1,2-BR), styrene-butadiene rubber (SBR), chloroprene rubber ( CR), nitrile rubber (NBR), butyl rubber (IIR), ethylene-propylene rubber (EPR, EPDM), chlorosulfonated polyethylene (CSM), acrylic rubber (ACM, ANM), epichlorohydrin rubber (CO, ECO), polyvulcanized Examples thereof include rubber (T), silicone rubber (Q), fluorine rubber (FKM, FZ), urethane rubber (U) and the like.

  Examples of the thermosetting resin include polyurethane, polyisocyanate, polyisocyanurate, phenol resin, epoxy resin, urea resin, melamine resin, unsaturated polyester resin, polyimide, and the like. These resins may be used alone or in combination of two or more. Among these resins, when blending thermally expandable graphite described later, a polyolefin resin or a rubber substance is preferable from the viewpoint that molding is possible at or below the expansion temperature, and among them, a polyethylene resin is preferable. In addition, a rubber substance is preferable from the viewpoint that a large amount of filler can be blended in order to further improve the fireproof performance. Furthermore, a phenol resin and an epoxy resin are preferable from the viewpoint of increasing the flame retardancy of the resin itself and improving the fire prevention performance. In particular, an epoxy resin is preferable because the selection of the molecular structure is wide and it is easy to adjust the fireproof performance and mechanical properties of the resin composition.

  Thermally expandable graphite is a conventionally known substance. Powders such as natural scaly graphite, pyrolytic graphite, and quiche graphite are mixed with inorganic acids such as concentrated sulfuric acid, nitric acid, and selenic acid, and concentrated nitric acid, perchloric acid, and perchloric acid. This is a crystalline compound in which a graphite intercalation compound is formed by treatment with a strong oxidizing agent such as a salt, permanganate, dichromate, hydrogen peroxide, etc., and maintains a layered structure of carbon. It is preferable to use the heat-expandable graphite obtained by the acid treatment as described above, further neutralized with ammonia, an aliphatic lower amine, an alkali metal compound, an alkaline earth metal compound, or the like.

  The particle size of the thermally expandable graphite is preferably 20 to 200 mesh. If the particle size is smaller than 200 mesh, the degree of expansion of graphite is small, and a sufficient expanded heat insulating layer cannot be obtained. If the particle size is larger than 20 mesh, there is an advantage that the degree of expansion of graphite is large. In this case, dispersibility deteriorates, and physical properties are inevitably lowered. Examples of commercially available products of thermally expandable graphite include “GREP-EG” manufactured by Tosoh Corporation, “GRAFGUARD” manufactured by GRAFTECH, and the like.

  It is preferable to add an inorganic filler to the thermally expandable resin composition.

  When the expanded heat insulating layer is formed, the inorganic filler increases the heat capacity and suppresses heat transfer, and works as an aggregate to improve the strength of the expanded heat insulating layer. The inorganic filler is not particularly limited, and examples thereof include metal oxides such as alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, and ferrites; calcium hydroxide, magnesium hydroxide And water-containing inorganic substances such as aluminum hydroxide and hydrotalcite; metal carbonates such as basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, strontium carbonate, and barium carbonate.

  In addition to these, inorganic fillers include calcium salts such as calcium sulfate, gypsum fiber, calcium silicate; silica, diatomaceous earth, dosonite, barium sulfate, talc, clay, mica, montmorillonite, bentonite, activated clay, sepiolite. , Imogolite, sericite, glass fiber, glass beads, silica balun, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, carbon balun, charcoal powder, various metal powders, potassium titanate, magnesium sulfate MOS ”(trade name), lead zirconate titanate, aluminum borate, molybdenum sulfide, silicon carbide, stainless steel fiber, zinc borate, various magnetic powders, slag fiber, fly ash, dehydrated sludge and the like. These inorganic fillers may be used alone or in combination of two or more.

  As a particle size of an inorganic filler, 0.5-100 micrometers is preferable, More preferably, it is 1-50 micrometers. When the addition amount of the inorganic filler is small, the dispersibility largely affects the performance, so that the particle size is preferably small. However, when it is less than 0.5 μm, secondary aggregation occurs and the dispersibility deteriorates. When the addition amount is large, the viscosity of the resin composition increases and moldability decreases as the high filling progresses, but the viscosity of the resin composition can be decreased by increasing the particle size. A thing with a large diameter is preferable. When the particle size exceeds 100 μm, the surface properties of the molded body and the mechanical properties of the resin composition are lowered.

  As the inorganic filler, for example, for aluminum hydroxide, “Hijilite H-31” (manufactured by Showa Denko) having a particle size of 18 μm, “B325” (manufactured by ALCOA) having a particle size of 25 μm, and calcium carbonate, Examples include 1.8 μm “Whiteon SB Red” (manufactured by Bihoku Powdered Industries Co., Ltd.), “BF300” (manufactured by Bihoku Powdered Industries Co., Ltd.) having a particle size of 8 μm, and the like.

  In the heat-expandable resin composition, a phosphorus compound may be further added in addition to the above components in order to increase the strength of the expansion heat insulating layer and improve the fireproof performance. The phosphorus compound is not particularly limited. For example, red phosphorus; various phosphate esters such as triphenyl phosphate, tricresyl phosphate, trixylenyl phosphate, cresyl diphenyl phosphate, xylenyl diphenyl phosphate; sodium phosphate, Examples thereof include metal phosphates such as potassium phosphate and magnesium phosphate; ammonium polyphosphates; compounds represented by the following chemical formula (1), and the like. Among these, from the viewpoint of fire prevention performance, red phosphorus, ammonium polyphosphates, and compounds represented by the following chemical formula (1) are preferable, and ammonium phosphates are more preferable in terms of performance, safety, cost, and the like. .

  In the chemical formula (1), R1 and R3 represent hydrogen, a linear or branched alkyl group having 1 to 16 carbon atoms, or an aryl group having 6 to 16 carbon atoms. R2 is a hydroxyl group, a linear or branched alkyl group having 1 to 16 carbon atoms, a linear or branched alkoxyl group having 1 to 16 carbon atoms, an aryl group having 6 to 16 carbon atoms, or a carbon number Represents 6 to 16 aryloxy groups.

  As red phosphorus, commercially available red phosphorus can be used, but from the viewpoint of safety such as moisture resistance and not spontaneously igniting during kneading, a material in which the surface of red phosphorus particles is coated with a resin is preferably used. The ammonium polyphosphates are not particularly limited, and examples thereof include ammonium polyphosphate and melamine-modified ammonium polyphosphate. Ammonium polyphosphate is preferably used from the viewpoint of handleability and the like. Examples of commercially available products include “AP422” and “AP462” manufactured by Clariant, “FR CROS 484” and “FR CROS 487” manufactured by Budenheim Iberica.

  The compound represented by the chemical formula (1) is not particularly limited. For example, methylphosphonic acid, dimethyl methylphosphonate, diethyl methylphosphonate, ethylphosphonic acid, propylphosphonic acid, butylphosphonic acid, 2-methylpropylphosphonic acid, t- Butylphosphonic acid, 2,3-dimethyl-butylphosphonic acid, octylphosphonic acid, phenylphosphonic acid, dioctylphenylphosphonate, dimethylphosphinic acid, methylethylphosphinic acid, methylpropylphosphinic acid, diethylphosphinic acid, dioctylphosphinic acid, phenylphosphine Examples include acid, diethylphenylphosphinic acid, diphenylphosphinic acid, bis (4-methoxyphenyl) phosphinic acid and the like. Among them, t-butylphosphonic acid is preferable in terms of high flame retardancy although it is expensive. The above phosphorus compounds may be used alone or in combination of two or more.

  In addition, the resin composition has a phenolic, amine-based, sulfur-based antioxidant, metal harm-preventing agent, antistatic agent, stabilizer, cross-linking agent, lubricant, softener as long as its physical properties are not impaired. A pigment or the like may be added. Moreover, a general flame retardant may be added and fire prevention performance can be improved by the combustion suppression effect by a flame retardant.

  In the resin composition constituting the thermally expandable refractory material, the amount of thermally expandable graphite is preferably 10 to 300 parts by weight with respect to 100 parts by weight of the resin component. If the blending amount is 10 parts by weight or more, the volume of the volume expansion coefficient is large and the synthetic resin member constituting the resin sash can sufficiently fill the burned-out portion. Strength is maintained. The amount of thermally expandable graphite is more preferably 20 to 250 parts by weight.

  In the resin composition, the blending amount of the inorganic filler is preferably 10 to 400 parts by weight with respect to 100 parts by weight of the resin component. When the blending amount is 10 parts by weight or more, sufficient fireproof performance is obtained, and when it is 400 parts by weight or less, the mechanical strength is maintained. The blending amount of the inorganic filler is more preferably 40 to 350 parts by weight.

  In a resin composition, when adding a phosphorus compound, the compounding quantity of a phosphorus compound is 30-300 weight part with respect to 100 weight part of resin components. When the blending amount is 30 parts by weight or more, the effect of improving the strength of the expanded heat insulating layer is sufficient, and when it is 300 parts by weight or less, the mechanical strength is maintained. The amount of the phosphorus compound is more preferably 40 to 250 parts by weight.

  Examples of commercially available heat-expandable fireproof sheets that can be used as the heat-expandable layer 11 include Fibrok (registered trademark) manufactured by Sekisui Chemical Co., Ltd., epoxy resin or butyl rubber as a resin component, phosphorus compound, heat-expandable graphite, and inorganic Sheet-like molded product of a heat-expandable resin composition containing fillers, etc.), Sumitomo 3M Fire Barrier (sheet material made of a resin composition containing chloroprene rubber and verculite, expansion coefficient: 3 times, thermal conductivity Rate: 0.20 kcal / m · h · ° C.), Mitsui Metal Paint Chemical Co., Ltd., medium cut (sheet material made of a resin composition containing polyurethane resin and thermally expandable graphite, expansion coefficient: 4 times, thermal conductivity: 0 .21 kcal / m · h · ° C.).

The fireproof structure 1 described above is constructed by sequentially executing the following operations (i) to (iv).
(I) A pipe 4 whose outer peripheral surface is covered with a covering material 9 is prepared.
(Ii) The sleeve 3 is inserted through the through passage 8 of the partition body 2.
(Iii) The pipe 4 is inserted into the sleeve 3 and the thermal expansion layer 11 of the covering material 9 is disposed within the range of the through passage 8.
(Iv) The fireproof sealing material 5 is filled between the inner peripheral surface of the sleeve 3 and the outer peripheral surface of the pipe 4.

  When a fire occurs in one of the fire prevention sections A and A, the thermal expansion layer 11 of the covering material 9 expands due to the heat of the fire transmitted through the pipe 4. The expanded thermal expansion layer 11 closes the voids generated by thermal deformation or burning of the pipe 4. For this reason, it is possible to prevent the fire from propagating to the other of the fire prevention sections A and A.

  According to this embodiment, since the thermal expansion material is included in the covering material 9, the pipe 4 whose outer peripheral surface is covered with the covering material 9 is prepared, and the pipe 4 is placed in the through-passage 8 (in the sleeve 3). The thermal expansion material can be disposed in the through-passage 8 by a simple operation to be inserted into the through-passage 8. For this reason, it is possible to easily realize fire resistance measures for the through passage 8.

  As shown in FIGS. 2 and 4, the innermost layer of the covering material 9 is composed of the thermal expansion layer 11 within the range of the through-passage 8, and the thermal expansion layer 11 comes into contact with the pipe 4. Therefore, in the event of a fire, the heat of the pipe 4 is directly transmitted to the thermal expansion layer 11. Therefore, since the thermal expansion layer 11 can be reliably expanded, it is possible to reliably prevent a fire from propagating through the through passage 8.

  In addition, since the thermal expansion material is included in the covering material 9 only within the range of the through path 8, fire resistance measures for the through path 8 can be realized while keeping the material cost of the covering material 9 low.

  Further, within the range of the through-passage 8, the covering material 9 has a laminated structure including the thermal expansion layer 11 and the heat retaining layer 10, so that both fire resistance measures for the through-passage 8 and heat insulation of the pipe 4 can be achieved.

  In addition, this invention is not limited to embodiment mentioned above, A various change can be made.

  For example, FIG. 2 shows an example in which the thermal expansion layer 11 extends over the entire width of the through-passage 8, but the length and position of the thermal expansion layer 11 in the through-passage 8 is due to thermal deformation of the pipe 4. It can be arbitrarily set as long as the generated void can be closed.

  Further, the cross-sectional structure of the covering material 9 within the range of the through-passage 8 is not limited to the one in which the thermal expansion layer 11 and the heat insulating layer 10 are provided one by one as shown in FIG. A plurality of the expansion layers 11 and the heat insulation layers 10 may be provided, and the heat expansion layers 11 and the heat insulation layers 10 may be alternately stacked.

  In the above-described embodiment, the example in which the sleeve 3 is inserted through the through-passage 8 is shown, but the sleeve 3 may be omitted. FIG. 6 is a perspective view showing a modification in which the sleeve 3 is omitted. 7 is a cross-sectional view taken along line aa in FIG. In the modification shown in FIGS. 6 and 7, the pipe 4 is inserted through the through path 8. And in the range of the penetration path 8, the outer peripheral surface of the piping 4 is covered with the coating | covering material 9 containing a thermal expansion material. Preferably, as shown in FIG. 7, within the range of the through-passage 8, the covering material 9 has a structure in which a heat insulating layer 10 made of a heat insulating material and a heat expansion layer 11 made of a heat expansion material are laminated. The innermost layer of the covering material 9 is composed of the thermal expansion layer 11 so that the thermal expansion layer 11 is in contact with the pipe 4. A space between the housing surface of the through passage 8 (the housing surface of the through holes 60 </ b> A and 60 </ b> B) and the outer peripheral surface of the pipe 4 is filled with the fireproof sealing material 5.

  2 and 7 show examples in which the covering material 9 extends over the entire length of the pipe 4, but the covering material 9 does not necessarily have to extend over the entire length of the pipe 4. For example, the outer peripheral surface of the pipe 4 may be covered with the covering material 9 containing the thermal expansion material only within the range of the through path 8, and the pipe 4 may not be covered with the covering material 9 outside the through path 8.

  Further, the covering material 9 disposed in the range of the through-passage 8 may be formed by molding a mixture obtained by kneading a thermal expansion material and a synthetic resin. Even if it does in this way, the space | gap produced by the thermal deformation or burning of the piping 4 can be obstruct | occluded because the thermal expansion material contained in the coating | covering material 9 expand | swells.

  Moreover, the division body 2 is not limited to the hollow wall which consists of a gypsum board, You may be other arbitrary walls, such as a lightweight aerated concrete (ALC) wall or the wall formed in solid with mortar. Moreover, the division body 2 is not restricted to the wall extended in an up-down direction, The floor or board extended in a horizontal direction may be sufficient.

  FIG. 8 is a perspective view showing a modification in which the partition 2 is a floor extending in the horizontal direction. 9 is a cross-sectional view taken along line aa in FIG. In the modification shown in FIGS. 8 and 9, the upper section C and the lower section D are partitioned by the partition 2. A through passage 8 extending in the vertical direction is formed in the partition body 2, and a pipe 4 is inserted through the through passage 8. And in the range of the penetration path 8, the outer peripheral surface of the piping 4 is covered with the coating | covering material 9 containing a thermal expansion material. Specifically, as shown in FIG. 9, within the range of the through-passage 8, the covering material 9 has a structure in which a heat insulating layer 10 made of a heat insulating material and a heat expansion layer 11 made of a heat expansion material are laminated. And the innermost layer of the covering material 9 is composed of the thermal expansion layer 11 so that the thermal expansion layer 11 is in contact with the pipe 4. Further, a refractory sealing material 5 is filled between the housing surface of the through passage 8 and the outer peripheral surface of the pipe 4. According to the above modification, when a fire occurs in one of the sections C and D, the thermal expansion layer 11 of the covering material 9 expands due to the heat of the fire transmitted through the pipe 4. The expanded thermal expansion layer 11 closes the voids generated by thermal deformation or burning of the pipe 4. For this reason, it is possible to prevent the fire from propagating to the other of the sections C and D via the through-passage 8.

DESCRIPTION OF SYMBOLS 1 Fireproof structure 2 Compartment 3 Sleeve 4 Piping 5 Fireproof sealing material 8 Through-passage 9 Covering material 11 Thermal expansion layer

Claims (8)

A covering material covering the outer peripheral surface of the pipe inserted through the through-passage of the partition body,
The range disposed in the through passage has a laminated structure including a thermal expansion layer made of a thermal expansion material and a heat insulation layer made of a heat insulation material, and the thermal expansion layer is closer to the pipe side than the heat insulation layer. A dressing configured to be placed . 2. The covering material according to claim 1, wherein the innermost layer is composed of the thermal expansion layer, and the thermal expansion layer is in contact with the pipe. Pipe outer peripheral surface is covered by a coating material according to claim 1 or 2. A compartment having a through-passage;
A sleeve inserted through the through passage;
A pipe inserted through the sleeve;
In the range of the through-passage, the outer peripheral surface of the pipe is covered with a covering material having a laminated structure including a thermal expansion layer made of a thermal expansion material and a heat insulation layer made of a heat insulation material, and the thermal expansion layer is A fireproof structure configured to be disposed closer to the piping than the heat retaining layer . The fireproof structure according to claim 4 , further comprising a fireproof sealing material filled between an inner peripheral surface of the sleeve and an outer peripheral surface of the pipe. A compartment having a through-passage;
A pipe inserted through the through-passage,
In the range of the through-passage, the outer peripheral surface of the pipe is covered with a covering material having a laminated structure including a thermal expansion layer made of a thermal expansion material and a heat insulation layer made of a heat insulation material, and the thermal expansion layer is A fireproof structure configured to be disposed closer to the piping than the heat retaining layer . The fireproof structure according to claim 6 , further comprising a fireproof sealing material filled between a housing surface of the through passage and an outer peripheral surface of the pipe. Within the scope of the through-passage, that the innermost layer of the previous SL dressing is composed of the thermal expansion layer, refractory according to any one of claims 4-7 wherein the thermal expansion layer is in contact with the pipe Construction.