JP4949173B2 - Joint-proof fire-resistant composite pipe member - Google Patents
Joint-proof fire-resistant composite pipe member Download PDFInfo
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- JP4949173B2 JP4949173B2 JP2007225844A JP2007225844A JP4949173B2 JP 4949173 B2 JP4949173 B2 JP 4949173B2 JP 2007225844 A JP2007225844 A JP 2007225844A JP 2007225844 A JP2007225844 A JP 2007225844A JP 4949173 B2 JP4949173 B2 JP 4949173B2
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- 230000009970 fire resistant effect Effects 0.000 title claims description 30
- 238000012856 packing Methods 0.000 claims description 73
- 239000000463 material Substances 0.000 claims description 55
- 239000012530 fluid Substances 0.000 claims description 17
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 15
- 239000003063 flame retardant Substances 0.000 claims description 15
- 239000004570 mortar (masonry) Substances 0.000 claims description 11
- 229920003002 synthetic resin Polymers 0.000 claims description 9
- 239000000057 synthetic resin Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 230000009969 flowable effect Effects 0.000 claims description 6
- 229920003051 synthetic elastomer Polymers 0.000 claims description 3
- 239000005061 synthetic rubber Substances 0.000 claims description 3
- 229920001169 thermoplastic Polymers 0.000 claims description 3
- 229920005992 thermoplastic resin Polymers 0.000 claims description 3
- 239000004416 thermosoftening plastic Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 4
- 229920000915 polyvinyl chloride Polymers 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
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- -1 polyethylene terephthalate Polymers 0.000 description 3
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- 239000004698 Polyethylene Substances 0.000 description 1
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- 239000011148 porous material Substances 0.000 description 1
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- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
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Description
本発明は、難燃性もしくは不燃性の外層管を備えた耐火複合管又は耐火複合管用管継手（本発明においては、複合管又は複合管用管継手の両者を併せて「複合管部材」という。）等の耐火複合管部材及び前記耐火複合管部材の製造方法に関するものである。 The present invention refers to a fireproof composite pipe or a fireproof composite pipe joint having a flame retardant or nonflammable outer layer pipe (in the present invention, both a composite pipe and a composite pipe joint are referred to as a “composite pipe member”). ) And the like, and a method for producing the fire-resistant composite tube member.
都市の建築物として、アパート、マンション、オフィスビルなどの集合住宅に大きな需要がある。これらの集合住宅は、通常水平および上下方向の隣接した区画同士には延焼防止に有効な空間を有さず、壁または床（天井）で仕切られるだけで建てられている。このため一旦火災が発生したときは、隣接区画に延焼し災害が大きくなり易いが、生命、財産等の保全の観点からもこれを防止するため、隣接あるいは上下の区画の間には耐火壁、耐火性床（天井）（本発明ではこれらを一括して「耐火壁」と呼ぶ。）などの延焼防止策が施されている。特に集合住宅においては、区画壁（耐火壁）で仕切られているだけであり、耐火壁自体に一戸建て住宅の外壁の場合よりも火災の延焼防止の機能が強く求められている。 There is a great demand for apartment buildings such as apartments, condominiums, and office buildings as urban buildings. These apartment houses are usually constructed by partitioning them by walls or floors (ceilings) without having an effective space for preventing fire spread between adjacent sections in the horizontal and vertical directions. For this reason, once a fire breaks out, it tends to spread to adjacent compartments and disasters are likely to increase, but in order to prevent this from the viewpoint of the preservation of life, property, etc., fire walls, between adjacent or upper and lower compartments, Fire prevention measures such as a fireproof floor (ceiling) (in the present invention, these are collectively referred to as “firewall”) are taken. In particular, apartment buildings are only partitioned by a partition wall (fire wall), and the fire wall itself is strongly required to have a function of preventing the spread of fire compared to the case of the outer wall of a detached house.
このような通常の集合住宅における一般的な耐火壁などには、給水、排水等の水回り施設及び電気やガスなどを供給するため設けられる配管を通すため、折角設けられた耐火壁などに配管する開口部を穿ち、これを通して配管が設けられることが多い。配管は耐火壁を貫通しているために、これらの配管には火災時においてこれら開口部を経由する延焼を防止する機能が必要とされる。上記の要望に対応するため、建築基準法や消防法に基づく基準や行政指導において、集合住宅における隣接する区画の間の耐火壁を貫通する耐火性配管材に必要とされる構造や性能が定められている。 In such a general fire wall in a normal apartment house, water supply facilities such as water supply and drainage and pipes provided for supplying electricity and gas are passed through. In many cases, a pipe is provided through the opening. Since the pipes penetrate the fire wall, these pipes are required to have a function of preventing the spread of fire through these openings in the event of a fire. In order to meet the above requirements, the standards and administrative guidance based on the Building Standards Act and the Fire Service Act determine the structure and performance required for fire-resistant piping materials that penetrate the fire-resistant walls between adjacent sections in apartment buildings. It has been.
耐火複合管部材は種々知られているが、モルタル等からなる不燃性または難燃性材料の外層管と、軽量で強度のある、硬質塩ビ管などの合成樹脂管の内層管で構成される二層構造で、直管で構成される耐火複合管（直管継ぎ手もある）やエルボ管やＴ字管で構成される耐火複合管継手が用いられている。これらの耐火複合管部材を建築物内部に配設するためには、それらを接続することが必要となる。
耐火複合管部材は種々知られているが、モルタル等からなる不燃性または難燃性材料の外層管と、軽量で強度のある、硬質塩ビ管、ポリエチレンテレフタレート管などの合成樹脂製内層管で構成される二層構造で、直管で構成される耐火複合管（直管継ぎ手もある）やエルボ管やＴ字管で構成される耐火複合管継手が用いられている。これらの耐火複合配管材は通常直管と各種のジョイント材とからなっており、内層管材はポリ塩化ビニルであるときは、直管の内層管とジョイント材の内層管を接着剤により接合するのが普通行われている。しかしこの場合耐火被覆外層管は単に突き合わせただけであって、配管後にその接合部に水系のモルタルなどの耐火性目地材を施工して接合部を封止することが行われる。
Various fire-resistant composite pipe members are known, but they are composed of an outer-layer pipe made of non-flammable or flame-retardant material made of mortar and the like and an inner-layer pipe made of a synthetic resin pipe such as a rigid PVC pipe that is lightweight and strong. A refractory composite pipe composed of a straight pipe (also having a straight pipe joint), an elbow pipe, and a T-shaped pipe joint is used. In order to arrange these fireproof composite pipe members inside the building, it is necessary to connect them.
Various fire-resistant composite pipe members are known, but they are composed of an outer-layer pipe made of non-flammable or flame-retardant material such as mortar, and an inner-layer pipe made of synthetic resin such as a hard PVC pipe or polyethylene terephthalate pipe that is lightweight and strong. Refractory composite pipes composed of straight pipes (including straight pipe joints), elbow pipes and T-shaped pipe joints are used. These refractory composite piping materials usually consist of straight pipes and various joint materials. When the inner layer pipe material is polyvinyl chloride, the inner layer pipe of the straight pipe and the inner layer pipe of the joint material are joined with an adhesive. Is usually done. In this case, however, the fire-resistant outer layer pipe is merely abutted, and after the pipe, a fire-resistant joint material such as an aqueous mortar is applied to the joint to seal the joint.
一般にセメント、水ガラスなどを用いた湿式目地材による封止は、施工時にはペースト状態なので自由度が高く、目地の形状への対応が容易であるが、乾燥や固化するに伴い収縮が避けられないため目地材に小さなひび割れをおこしやすく、また地震や施工後の補修時などに発生する予期しない震動に対しても対応性に欠けるためひび割れがおきやすい欠点がある。さらにこれらの耐火複合管の配管は、その殆どが床下の狭い空間であって目地施工は配管終了後に施工されるものであり、特に耐火壁の近辺の接続の場合には見えにくいため目地材の全周のモルタルの施工が困難な場合がしばしば発生するので目地材の不完全な施工となり、延焼の原因となる危険がある。いずれにしても湿式目地材は人手がかかり、また弾力性がないのでひび割れが発生し易い。 In general, sealing with wet joint material using cement, water glass, etc. is a paste state at the time of construction, so it has a high degree of freedom and it is easy to adapt to the shape of the joint, but shrinkage is inevitable as it dries and solidifies For this reason, there are drawbacks in that small cracks are likely to occur in joint materials, and cracks are likely to occur due to lack of compatibility with unexpected vibrations that occur during earthquakes and repairs after construction. Furthermore, most of these pipes of fireproof composite pipes are narrow spaces under the floor, and jointing work is done after the pipes are finished, especially in the case of connection near the fireproof wall, so it is difficult to see the jointing material. Since it is often difficult to apply mortar around the entire circumference, there is a risk that the joint material will be incompletely applied and cause fire spread. In any case, the wet joint material requires manual labor and is not elastic so that cracks are likely to occur.
これらの配管においての問題を解決するために、外層管同士は弾力性のある環状パッキンを配管時に複合管端部に嵌合し、複合管部材同士を接合するものもある。前記の配管施工において、環状パッキンを使用する場合には、端部に露出した内層管に嵌合装着するが、管接続作業において脱落する虞があり、脱落しないように注意しながらの作業となり面倒である。
この面倒さを排除するため、パッキンとして熱膨張性パッキンを採用した提案も見受けられる（特許文献１，２）。
In order to solve the problems in these pipes, there are pipes in which the outer pipes are joined together by fitting an elastic packing to the end of the composite pipe at the time of piping. When using an annular packing in the above-mentioned piping construction, it is fitted and attached to the inner layer pipe exposed at the end. It is.
In order to eliminate this troublesomeness, proposals using a thermally expandable packing as a packing are also seen (
しかし、これら提案の熱膨張性パッキンは、現場において嵌合することが原則であり、配管部材の接合時に上記嵌合したパッキンが脱落したりすることがあるため、環状パッキンの一端面に外層管内方に食い込むアンカー突起を設けた環状パッキンが提案された（特許文献３）。
この環状パッキンは、アンカー突起があるため、外層管がうまく形成できる場合にはアンカー突起が外層管内に食い込み、脱落防止の効果が発揮できるが、不燃性または難燃性の流動性材料を圧入する際、環状パッキンと流動性材料の間にある空気の抜けが悪く、所定の効果が発揮できない危険がある。
However, these proposed thermally expandable packings are generally fitted on site, and the fitted packing may fall off when joining pipe members. An annular packing provided with anchor protrusions that bite in the direction has been proposed (Patent Document 3).
Since this annular packing has anchor projections, if the outer layer pipe can be formed well, the anchor projections can bite into the outer layer pipe and exhibit the effect of preventing falling off, but press-fit nonflammable or flame retardant fluid material At this time, there is a risk that the air between the annular packing and the fluid material is not easily removed and the predetermined effect cannot be exhibited.
本発明は、不燃性または難燃性の流動性のある硬化性材料（外層管材料）と環状に形成されたパッキンを嵌合装着するに際し、該流動性材料と環状パキンの間にある空気をスムーズに流出させ、隙間を生じさせずに外層管内部及び外層管とパッキンの境界に空洞の発生を防止するとともに、パッキンを耐火複合管部材に完全に嵌合・装着せしめ、パッキンの脱落を完全に防止して耐火複合管部材の接合操作を容易にするともに、該パッキンを熱膨張性材料を用いることにより外層管同士の接合を目地処理不要とする耐火複合管部材及び目地処理不要耐火複合管部材の製造方法に関する。 In the present invention, when a non-flammable or flame-retardant fluid curable material (outer tube material) and an annular packing are fitted and mounted, the air between the fluid material and the annular packing is removed. It smoothly flows out, prevents the formation of cavities inside the outer layer pipe and the boundary between the outer layer pipe and the packing without creating a gap, and completely fits and attaches the packing to the fireproof composite pipe member to completely remove the packing. The fire-resistant composite pipe member and the joint-treatment-free fire-resistant composite pipe are made to prevent the joint operation of the outer-layer pipes by using a thermally expansible material while preventing the joint operation of the fire-resistant composite pipe member. The present invention relates to a method for manufacturing a member.
本発明は、
［１］ 難燃性または不燃性の外層管の内部に熱可塑性合成樹脂内層管を備えた耐火複合管又は耐火複合管用管継手において、熱膨張性材料を用いて環状に形成され、外層管と当接する面に、パッキンと外層管の接続を確実にするための凹所を設け、かつ該凹所に当接面反対面までの空気流出手段を有する環状パッキンを、前記外層管端面に嵌合・装着したことを特徴とする目地処理不要の耐火複合管部材、
［２］ 上記凹所に当接面反対面までの空気流出手段が、空気流出用貫通小孔または空気流出用溝である請求項１に記載の目地処理不要耐火複合管部材。
［３］ パッキンが、熱膨張性材料を用いて環状に形成され、外層管と当接する面に複数の凹所を設け、該凹所に反対面まで貫通した空気流出用小孔を設けてなるパッキンを用いる上記［１］または［２］に記載の目地処理不要耐火複合管部材、
［４］ 熱膨張性材料が、耐熱性のある合成ゴムまたは合成樹脂を主体とし、これに有機または無機の熱膨張性のある材料が配合されたものである上記［１］〜［３］のいずれかに記載の目地処理不要耐火複合管部材、
［５］ 耐火複合管部材が、熱可塑性樹脂管の内層管と、軽量モルタルを主材として形成された難燃性の外層管で構成された耐火複合管又は耐火複合管用管継手である上記［１］〜［４］のいずれかに記載の目地処理不要耐火複合管部材、
The present invention
[1] A fire-resistant composite pipe or a pipe joint for a fire-resistant composite pipe provided with a thermoplastic synthetic resin inner-layer pipe inside a flame-retardant or non-flammable outer-layer pipe, is formed in an annular shape using a thermally expandable material, An annular packing having a recess for ensuring the connection between the packing and the outer layer pipe on the abutting surface and having an air outflow means up to the surface opposite to the abutting surface is fitted to the end surface of the outer layer pipe.・ A fire-resistant composite pipe member that requires no joint treatment,
[2] The joint treatment-free fireproof composite pipe member according to [1], wherein the air outflow means up to the opposite surface of the recess is an air outflow through hole or an air outflow groove.
[3] The packing is formed in a ring shape using a thermally expansible material, and is provided with a plurality of recesses on the surface that comes into contact with the outer tube, and a small hole for air outflow penetrating to the opposite surface in the recess. The joint-proof fire-resistant composite pipe member according to the above [1] or [2] using packing,
[4] The above-mentioned [1] to [3], wherein the heat-expandable material is mainly composed of heat-resistant synthetic rubber or synthetic resin, and an organic or inorganic heat-expandable material is blended therein . A joint-resistant fire-resistant composite pipe member according to any of the above,
[5] The above-mentioned fireproof composite pipe member is a fireproof composite pipe or a pipe joint for a fireproof composite pipe composed of an inner layer pipe of a thermoplastic resin pipe and a flame retardant outer layer pipe formed mainly from a lightweight mortar. 1] to [4], a joint-resistant fire-resistant composite pipe member,
［６］ 内装管の所定の位置に、当該当接面にパッキンと外層管の接続を確実にするための凹所を有し、かつ該凹所に当接面反対面までの空気流出手段を有する熱膨張性で環状に形成された環状パッキンをセットし、その外層管側から不燃性または難燃性の流動性材料を圧入し、外層管と環状パッキンを一体に成形した後、硬化することを特徴とする目地処理不要耐火複合管部材の製造方法、
［７］ 外層管形成用の不燃性または難燃性の流動性材料として、軽量モルタルを用いることを特徴とする上記［６］に記載の目地処理不要耐火複合管部材の製造方法を開発することにより上記の課題を解決した。
[6] A recess for ensuring the connection between the packing and the outer layer pipe is provided in the abutting surface at a predetermined position of the inner pipe, and an air outflow means to the opposite surface of the abutting surface is provided in the recess. Set the annular packing formed in a ring shape with thermal expansion, press the non-flammable or flame retardant fluid material from the outer layer tube side, and mold the outer layer tube and the annular packing integrally and then cure A method of manufacturing a fire-resistant composite pipe member that does not require joint treatment,
[7] To develop a method for manufacturing a joint-resistant fire-resistant composite pipe member according to the above [6], characterized in that a lightweight mortar is used as the non-combustible or flame-retardant flowable material for forming the outer layer pipe. The above problem has been solved.
本発明は、耐火複合管部材の外層管の端面に、熱膨張性材料で形成された、凹所を有し、かつ該凹所内に反対面までの空気流出手段を有する環状パッキンを使用することにより、複合管部材の成形における外層管形成が低圧であってもポアなどの発生もなく、凹所に外層管材料が十分に充填できること、凹所内にまで十分に外層管材料が充填されるため、パッキンとの結合性が高く、配管作業中での当該パッキンの脱落の怖れがなく配管作業を効率的に行えること、パッキンに膨張性材料を使用しているため外層管同士の接続に気密性を不要とし、作業性が大幅に改善できること、特に狭隘な場所で必要とされていた目地処理が全く不要となったこと、など大きく作業性が改善できるとともに火災時などのおける内層管の保全能力を大きく改善できた。 The present invention uses an annular packing made of a heat-expandable material on the end face of the outer layer pipe of the fireproof composite pipe member, and having an air outflow means to the opposite face in the recess. As a result, the formation of the outer layer tube in the molding of the composite tube member can be sufficiently filled with the outer layer tube material without any generation of pores or the like, and the outer layer tube material can be sufficiently filled into the recess. Highly connectable with packing, can be efficiently piped without fear of dropping of the packing during piping work, and uses an expansive material for packing, making the connection between outer layer tubes airtight Workability can be greatly improved, workability can be greatly improved, especially joint treatment that was required in confined areas is completely unnecessary, and workability can be greatly improved, and maintenance of the inner pipe in a fire etc. Greatly improved ability It could be.
本発明に係る耐火複合管部材は、外層管との当接面に凹所を有しかつ該凹所に当接面反対面までの空気流出手段を有する有機または無機の熱膨張性材料を用いて環状に成形されたパッキンを用いている点にある。
高温状態において、外層管の気密性を保持するためのパッキンの熱膨張性材料としては、一例として加熱された場合に膨張性のある熱膨張性ゴムまたは合成樹脂を用いることが好ましい。この熱膨張性材料の組成としてはポリエチレン、ポリプロピレン等の合成ゴムや合成樹脂を主体としたものにグラファイト系、バーミキュライト、パーライトなどの加熱されると膨張する無機系の膨張剤、各種の無機充填材、ゴム軟化剤、老化防止剤などを配合したものが使用される。加熱されるとほぼ数倍に膨張する。
The fire-resistant composite pipe member according to the present invention uses an organic or inorganic thermally expandable material having a recess on the contact surface with the outer layer tube and having an air outflow means up to the surface opposite to the contact surface in the recess. In this respect, a ring-shaped packing is used.
As a heat-expandable material of the packing for maintaining the airtightness of the outer tube at a high temperature, it is preferable to use a heat-expandable rubber or a synthetic resin that is expandable when heated as an example. The composition of this thermally expansible material is composed of synthetic rubbers such as polyethylene and polypropylene, and synthetic resins mainly composed of inorganic expansive agents such as graphite, vermiculite, pearlite, etc. that expand when heated, and various inorganic fillers. , Rubber softener, anti-aging agent and the like are used. When heated, it expands almost several times.
外層管との当接面に設ける凹所の形状、数、サイズなどは、該凹所が外層管用の流動性材料を圧入したときに、凹所内に外層材が充填してパッキンの固定を確実にし、一体成形した後に安定にパッキンを保持するためのものである。従って空気流出手段は、凹所内に当接面反対面までの空気流出用の貫通小孔を設けたものであっても良く、あるいはパッキン内面にリブを設けると共に該凹所の底面から内面方向に向かって溝を設けるか、当接面反対面までの空気流出用溝のようなものであっても良い。例えば形状としては円形、小判型、矩形などが普通であり、数もパッキンサイズにより変わるが、大きければ多くしてもかまわない。従って通常は４〜２０の間になる。サイズも環状パッキンの当接面のサイズに応じて変わってよいが、断面幅の４０〜６０％位あれば上記の目的を達成する。 The shape, number, size, etc., of the recesses on the contact surface with the outer layer pipes ensure that the outer layer material is filled into the recesses and the packing is fixed when the recesses press-fit the flowable material for the outer layer pipes. In order to stably hold the packing after being integrally formed. Therefore, the air outflow means may be one in which a through small hole for air outflow to the opposite surface to the contact surface is provided in the recess, or a rib is provided on the inner surface of the packing and from the bottom surface of the recess toward the inner surface. A groove may be provided in the direction toward the surface opposite to the contact surface. For example, the shape is usually circular, oval, rectangular or the like, and the number varies depending on the packing size, but may be larger as long as it is larger. Therefore, it is usually between 4 and 20. The size may vary depending on the size of the contact surface of the annular packing, but the above object can be achieved if it is about 40 to 60% of the cross-sectional width.
上記凹所に設けられる当接面の反対側までの空気流出手段は、例えば凹所内に空気が流出可能な貫通小孔または凹所の一部に反対面に通じる空気が流出可能なスリットまたは溝（本発明においてはこれを溝と表現する。）を設けておくことが必要である。
該空気流出手段は、耐火複合管部材の外層管を形成する際に、内層管の所定の位置に、凹所を有する面を内側にして装着し、これに不燃性または難燃性の外層管用の流動性材料（硬化することが必要）、例えば軽量モルタルを圧入する際に、該貫通小孔または空気流出用溝から空気が流出させる為に設けたものである。
従って、該空気流出手段のサイズは、機能的に凹所から当接面反対面までの空気流出用手段が設けられておればよい。この内径は空気の通過は許すが、モルタルやスラリーなどな流体の通過を許さないものであれば良く、流体の粘度を確定すれば単なテストでそのサイズは決定でき、使用状況に応じて上記の目的を達成できる。
The air outflow means up to the opposite side of the contact surface provided in the recess is, for example, a through hole that allows air to flow into the recess, or a slit or groove that allows air to flow to the opposite surface to a part of the recess. (In the present invention, this is expressed as a groove).
When the outer layer pipe of the fireproof composite pipe member is formed, the air outflow means is attached to a predetermined position of the inner layer pipe with the surface having a recess inside, and is used for an incombustible or flame retardant outer layer pipe. In order to allow air to flow out from the small through holes or the air outflow grooves when press-fitting a fluid material (which needs to be cured), for example, a lightweight mortar, is provided.
Accordingly, the size of the air outflow means may be such that air outflow means from the recess to the surface opposite to the contact surface is functionally provided. This inner diameter allows the passage of air but does not permit the passage of fluids such as mortar and slurry. Once the viscosity of the fluid is determined, the size can be determined by a single test. Can achieve the purpose.
該流動性材料、例えば軽量モルタルなどは粘度が高く、通常金型内に圧入しても、パッキン面まで十分に充填することは相当困難であり、完全に充填をするためには相当の高圧での充填が必要であるが、本発明のパッキンにおいては空気流出手段を経て内部の空気が容易に流出するため、比較的低圧力で流動性材料をパッキン面及び上記凹所の内部まで容易に充填ができる効果がある。このため、外層管内部及び外層管とパッキン面の流動性材料の充填が完全となり、流動性材料が固化するとパッキンの装着度が高く維持できる。 The flowable material such as lightweight mortar has a high viscosity, and even if it is usually press-fitted into a mold, it is very difficult to sufficiently fill the packing surface. However, in the packing of the present invention, the air inside easily flows out through the air outflow means, so that the fluid material is easily filled up to the packing surface and the inside of the recess by a relatively low pressure. There is an effect that can. For this reason, the filling of the fluid material inside the outer layer tube and the outer layer tube and the packing surface becomes complete, and when the fluid material is solidified, the degree of packing can be maintained high.
以上の説明からわかるように、本発明の難燃性または不燃性の外層管の内部に熱可塑性合成樹脂内層管を備えた耐火複合管又は耐火複合管用管継手において、熱膨張性材料を用いて環状に形成され、外層管と当接する面に、パッキンと外層管の接続を確実にするための凹所を設け、かつ該凹所に当接面反対面までの空気流出用貫通小孔または空気流出用溝を有する環状パッキンを、前記外層管端面に嵌合・装着した耐火複合管部材は、配管において、常温であっても内管の接合は液密性あるいは気密性が必要であるが、外層管の接続は常温にあっては外層管同士の密着性は厳密な密閉状態を要求しない。高温にさらされたときに、パッキンが膨張し、そのわずかに残る隙間を完全に密閉状態に保持するため、配管後において目地処理が不要である。 As can be seen from the above description, in a fireproof composite pipe or a pipe joint for a fireproof composite pipe having a thermoplastic synthetic resin inner pipe inside the flame retardant or nonflammable outer pipe of the present invention, a thermally expandable material is used. An annular hole formed on the surface that comes into contact with the outer layer pipe is provided with a recess for ensuring the connection between the packing and the outer layer pipe, and the through hole for air outflow to the opposite surface of the contact surface or air The fireproof composite pipe member fitted with and fitted with an annular packing having an outflow groove on the end face of the outer layer pipe is required to be liquid-tight or air-tight in the pipe even at room temperature, When the outer layer pipes are connected at room temperature, the tight adhesion between the outer layer pipes is not required. When the packing is exposed to high temperature, the packing expands, and the slight remaining gap is kept in a completely sealed state, so that joint treatment is unnecessary after piping.
なおパッキンは耐火複合管と耐火複合管用管継手のいずれに設けてあってもよいが、接合部に１個存在すればよいので、耐火複合管直管が配管時において現場寸法に合わせてその端部を切断する必要があるところから、パッキンの設置場所は好ましくは耐火複合管用管継手（内管接合部を有する直管継手または曲管継手その他三股分岐管等）に設けておくことが好ましい。そうすれば耐火複合管は従来使用されてきたパッキンを設けてない耐火複合管直管をそのまま使用できる。 The packing may be provided on either the fireproof composite pipe or the pipe joint for the fireproof composite pipe, but it is only necessary to have one at the joint. Since it is necessary to cut the portion, it is preferable that the packing is installed in a fire-resistant composite pipe joint (a straight pipe joint having an inner pipe joint or a curved pipe joint or other three-branch branch pipe). If it does so, the refractory compound pipe which has not been provided with the packing which has been conventionally used can be used as it is.
以下本発明について図面に基づいて本件発明を説明する。
図１は、凹所１１内に空気流出用貫通小孔１２を有するパッキン１０を用いて外層管４の端部であって、内層管３の所定の端部位置に、挿入部６を残して固定した耐火複合管１を示す。この場合、挿入部６の長さは通常の耐火複合管１と同じものとなる。
図２は、凹所１１内に空気流出用貫通小孔１２を有するパッキン１０を外層管４の端部であって、内層管接合部５の端部に固定した耐火複合管継手２を示す。
耐火複合管１と耐火複合管継手２を組み立てる際には、耐火複合管継手２の内層管接合部５の部分に耐火複合管１を挿入、内層管３は気密または液密に固定し、外層管同士４は、気密または液密を必要とせずに単に付け合わせた接合状態で配管すればよい。
火災など、配管が加熱状態に曝されたときは、該配管システムは熱膨張性材料が膨張し、外層管同士の接合部をカバーして外部の熱が熱可塑性樹脂からなる内層管３が曝されること確実に防止できることを確認した。
The present invention will be described below with reference to the drawings.
FIG. 1 shows an end portion of an
FIG. 2 shows the fireproof composite pipe joint 2 in which the packing 10 having the air outflow
When assembling the refractory
When a pipe is exposed to a heated state such as a fire, the heat-expandable material expands in the pipe system, covers the joint between the outer-layer pipes, and external heat is exposed to the inner-
図３及び図４は、図１または２に示した空気流出用貫通小孔１２を有するパッキンに代え、空気流出用溝を有するパッキンを用いた耐火複合管及び耐火複合管用管継手の断面図を示すものである。空気流出用貫通小孔と、空気流出用溝は機能的には同じ機能を有する。
3 and 4 are sectional views of a fireproof composite pipe and a pipe joint for a fireproof composite pipe using a packing having an air outflow groove instead of the packing having the air outflow through
図５は凹所１１に空気流出用貫通小孔１２を有するパッキン１０の拡大平面図である。空気流出用貫通小孔１２は外層管用流動性材料の凹所への充填を効率的にするように凹所の底部に設けておくことが好ましい。図６は同パッキンのＸ−Ｘにおける断面図である。
図７は凹所１１に空気流出用の空気流出用溝１２を有するパッキン１０の拡大平面図である。空気流出用溝１３は外層管用流動性材料の凹所への充填を効率的にするように、凹所から外層管当接面の反対面までパッキンの内側を経由して設けておくことが好ましい。図８の図（ａ）はパッキン内面にリブ１４を設けると共に該凹所の底面から内面方向に向かって溝１３を設けた、同パッキンの図７のＹ−Ｙにおける断面図である。図（ｂ）は図９の図（ａ）端部の拡大図である。
FIG. 5 is an enlarged plan view of the packing 10 having the air outlet through
FIG. 7 is an enlarged plan view of the packing 10 having an
図９（ａ）〜（ｄ）は、耐火複合管用管継手１の外層管の製造スキームを示す。
図９の図（ａ）のように外層管成型用金型２０内に、内層管３の所定の位置に、凹所１１内に空気流出用貫通小孔１２を有するパッキン１０をセットし、次いでこれに図（ｂ）に示すように金型２０の流動性材料入り口２１から外層管用の硬化性流動性材料２２を圧入する。内層管３と金型２０の間にある空気は、パッキン１０に設けられた空気流出用貫通小孔１２から流出し、図（ｃ）に示すように凹所１１内まで低圧であっても充填できる。硬化性流動性材料２２がある程度固化した後金型２０を取り外し、そのまま放置するかあるいはスチームエージングして完全に硬化させて図（ｄ）のように耐火複合管１を製造することができる。
FIGS. 9A to 9D show a production scheme of the outer layer pipe of the
As shown in FIG. 9A, the packing 10 having the air outflow
本発明に係る耐火複合管部材は、熱膨張性材料を用いたパッキンを使用しているため、安全性も高くかつ工程も容易となり安価ですむ利点があるので、配管に際して内層管の接合は気密性、液密性を必要とするが、外層管は少しであれば多少のクリアランスの存在があっても配管後の目地処理は不要であるため、アパートメント、マンション、オフィースビルディング等の高層建築において、耐火壁を貫通して配設される、ユーティリチィー管、空調用通気管、電線、電話線等の耐火性のある気体用または液体用各種配管に有利に用いることができる。
Since the fire-resistant composite pipe member according to the present invention uses a packing using a thermally expansible material, there is an advantage that the safety is high, the process is easy, and the cost is low. However, if the outer layer pipe is small, there is no need for joint treatment after piping even if there is some clearance, so in high-rise buildings such as apartments, condominiums, office buildings, etc. It can be advantageously used for various fire-resistant gas or liquid pipes such as utility pipes, air-conditioning vent pipes, electric wires, telephone wires, etc., which are disposed through the fire-resistant wall.
１：耐火複合管
２：耐火複合管継ぎ手
３：内層管（塩ビ管）
４：外層管（軽量コンクリート）
５：内管接合部
６：挿入部
１０：パッキン（熱膨張性耐熱パッキン）
１１：凹所
１２：空気流出用貫通小孔
１３：空気流出用溝
１４：リブ
２０：外層管成型用金型
２１：流動性材料入り口
２２：外層管用流動性材料
1: Fireproof composite pipe 2: Fireproof composite pipe joint 3: Inner layer pipe (PVC pipe)
4: Outer pipe (lightweight concrete)
5: Inner pipe joint 6: Insertion part 10: Packing (thermally expandable heat-resistant packing)
11: recess 12: through hole for air outflow 13: groove for air outflow 14: rib 20: mold for outer layer pipe molding 21: fluid material inlet 22: fluid material for outer layer pipe
Claims (7)
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| KR101619457B1 (en) * | 2014-06-10 | 2016-05-13 | (주)디모스텍 | Foamable Fireproof is Equipped Drainpipe |
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| JP2002031280A (en) * | 2000-07-12 | 2002-01-31 | Showa Denko Kenzai Kk | Connecting structure of composite pipe |
| JP2002228054A (en) * | 2000-12-01 | 2002-08-14 | Bakuma Kogyo Kk | Fireproof composite pipe, connection structure and connection method therefor |
| JP4085358B2 (en) * | 2001-11-27 | 2008-05-14 | フネンアクロス株式会社 | Joint device for fireproof double-layer pipe joints |
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