JP5451064B2 - Thermal expansion blockage promotion type fireproof two-layer pipe joint and thermal expansion agent storage device - Google Patents

Thermal expansion blockage promotion type fireproof two-layer pipe joint and thermal expansion agent storage device Download PDF

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JP5451064B2
JP5451064B2 JP2008335968A JP2008335968A JP5451064B2 JP 5451064 B2 JP5451064 B2 JP 5451064B2 JP 2008335968 A JP2008335968 A JP 2008335968A JP 2008335968 A JP2008335968 A JP 2008335968A JP 5451064 B2 JP5451064 B2 JP 5451064B2
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thermal expansion
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JP2010139057A (en
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裕之 久保田
潤一 村木
貞治 大木田
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フネンアクロス株式会社
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
    • F16L5/02—Sealing
    • F16L5/04—Sealing to form a firebreak device

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Description

本発明は、合成樹脂製の継手内管に繊維混入モルタルを被覆した構成の耐火二層管継手に適用して火災の熱で膨張する熱膨張手段により継手内管の管路を閉塞する作動を促進する形式の熱膨張閉塞型耐火二層管継手に関する。 The present invention is applied to a fireproof double-layer pipe joint having a structure in which a synthetic resin joint pipe is covered with fiber-mixed mortar, and the operation of closing the pipe of the joint pipe by thermal expansion means that expands by the heat of fire. about the thermal expansion obstructive refractory bilayer pipe joint hand forms to promote.

従来、高層住宅の床スラブなどの防火区画を貫通して設けられる管路には、火災時に防火区画を通じて火災の被害を波及させないように十分な耐火性能と防災性能を備えることが要望されている。このうち耐火性を備えた管路構成の一例として、床スラブに耐火二層管継手を埋設し、この継手の接続口に耐火二層管を接続したものが知られている。この耐火二層管継手は、ポリ塩化ビニール製の継手内管の周面が繊維混入モルタルで覆われており、この継手に接続される耐火二層管は、ポリ塩化ビニール製の内管に繊維混入モルタル製の外管を装着した構成のもので、耐火二層管継手と耐火二層管の接続部分には、耐火性のテープを巻き付けるか、或いは熱膨張性目地を介在させるなどして火災の熱が接続部分への侵入を防止している（特開２００４−１５０６１９号公報 第２図、第３図参照）。尚、継手内管の周面を繊維混入モルタルで覆うには、継手内管を金型に収め、継手内管と金型の隙間に繊維混入モルタルを注入することにより行われている。  Conventionally, pipes provided through fire prevention compartments such as floor slabs of high-rise houses have been required to have sufficient fire resistance and disaster prevention performance so as not to spread fire damage through fire prevention compartments in the event of a fire. . Among these, as an example of a pipeline structure having fire resistance, a construction in which a fire-resistant double-layer pipe joint is embedded in a floor slab and a fire-resistant double-layer pipe is connected to a connection port of this joint is known. In this fireproof double-layer pipe joint, the inner surface of the joint pipe made of polyvinyl chloride is covered with fiber-mixed mortar, and the fireproof double-layer pipe connected to this joint is made of fiber on the inner pipe made of PVC. A structure with an outer pipe made of mixed mortar. A fire-resistant tape is wrapped around the joint between the fire-resistant double-layer pipe joint and the fire-resistant double-layer pipe, or a fire-expandable joint is interposed. This prevents the heat from entering the connecting portion (see Japanese Patent Application Laid-Open No. 2004-150619, FIGS. 2 and 3). The peripheral surface of the joint inner pipe is covered with a fiber-mixed mortar by placing the joint inner pipe in a mold and injecting the fiber-mixed mortar into the gap between the joint inner pipe and the mold.

上記した耐火二層管継手と耐火二層管で構成された管路を一層安価に構築するために、耐火二層管の代わりに内管のみ、例えばポリ塩化ビニール管のみを使用することが考えられるが、この場合は、ポリ塩化ビニール管に耐火性がないので、管継手の接続部に熱膨張性耐火材を取り付け、火災の際にはこの熱膨張性耐火材が膨張して継手内管を押し潰すことで管路の閉塞を促進し、これにより火災の被害が防火区画を介して他室へ波及することを阻止している（特開平９−１５２０６５号公報）。  In order to construct a pipe line composed of the above-mentioned fireproof double-layer pipe joint and fireproof double-layer pipe at a lower cost, it is considered to use only the inner pipe, for example, only the polyvinyl chloride pipe, instead of the fireproof double-layer pipe. However, in this case, since the PVC pipe is not fireproof, a heat-expandable refractory material is attached to the joint of the pipe joint, and in the event of a fire, the heat-expandable refractory material expands and the pipe inside the joint By crushing, the blockage of the pipeline is promoted, thereby preventing the fire damage from spreading to other rooms through the fire prevention section (Japanese Patent Laid-Open No. 9-152065).

また、管路の継手に鋳物製のものを使用し、この継手にポリ塩化ビニールなどの合成樹脂製の配管を接続して管路を構築することも提案されているが、この場合も配管が溶損し易いので鋳鉄製継手の端部に配管を囲む熱膨張性耐火材を取り付け、火災の際には熱膨張性耐火材が膨張して配管を押し潰し、管路を閉塞することも提案されている（特開２００８−２０８６５３号公報）。
特開２００４−１５０６１９号公報 特開平９−１５２０６５号公報 特開２００８−２０８６５３号公報 It has also been proposed to use a cast pipe joint and connect a pipe made of synthetic resin such as polyvinyl chloride to the joint to construct the pipe. It is also proposed that a heat-expandable refractory material surrounding the pipe is attached to the end of the cast iron joint because it is easily melted, and in the event of a fire, the heat-expandable refractory material expands to crush the pipe and close the pipeline. (Japanese Patent Laid-Open No. 2008-208653).
JP 2004-150619 A JP-A-9-152065 JP 2008-208653 A

上記のように、耐火性テープを巻き付け、或いは熱膨張性目地を使用する防火措置は、管路を閉塞するものではないから、管路が損傷した場合に煙や熱風が継手を介して防火区画を越えて火災の被害が波及することがある。これに対し、特許文献２に記載されたような熱膨張性耐火材が配管を押し潰して管路の閉塞を促進する形式のものは、管路が閉塞されるので、耐火性の継手にポリ塩化ビニール管のような耐火性のない比較的安価な配管を接続することができ、かなり長い時間に亘って管路を閉塞し続けることができるという利点がある。この管路の閉塞状態について更に説明すると、熱膨張性耐火材は、合成樹脂製の配管が軟化する温度になったとき膨張を開始し、軟化した配管を押し潰すことで管路を閉塞するが、時間が経過すると軟化した配管は炭化し、火炎等で飛散するまでの間、その閉塞状態を続けることができる。こうした閉塞式のものは、熱膨張性耐火材を取付けるための特別な装置を設けると配管費用が高くなり、施工に時間が掛かる不都合がある。  As mentioned above, fire protection measures that wrap around fireproof tape or use thermally expandable joints do not close the pipeline, so if the pipeline is damaged, smoke or hot air is blown through the joint in the fireproof section. Fire damage may spread beyond On the other hand, the type in which the thermally expandable refractory material described in Patent Document 2 crushes the pipe to promote the blockage of the pipe line is blocked, so that the pipe is closed. There is an advantage that a relatively inexpensive pipe having no fire resistance such as a vinyl chloride pipe can be connected and the pipe line can be blocked for a considerably long time. The plugged state of the pipe line will be further explained. The thermally expandable refractory material starts to expand when the temperature of the synthetic resin pipe is softened, and clogs the softened pipe. When time elapses, the softened pipe is carbonized and can be kept closed until it is scattered by a flame or the like. Such a closed type is disadvantageous in that if a special device for attaching the heat-expandable refractory material is provided, the piping cost becomes high and the construction takes time.

また、これに使用される熱膨張性耐火材には各種のものがあり、例えば熱膨張性黒鉛、加硫ゴム、亜リン酸アルミニウム、水酸化アルミニウムを含んだ成形品が使用されているが、嵩張るうえに生産コストが掛かりかなり高価である。  In addition, there are various types of heat-expandable refractory materials used for this, for example, molded products containing heat-expandable graphite, vulcanized rubber, aluminum phosphite, and aluminum hydroxide are used. In addition to being bulky, it is very expensive due to production costs.

本発明は、管路閉塞のためのこうした不都合等を解消し、簡単に施工でき製作も容易で安価に得られる熱膨張閉塞促進型耐火二層管継手を提供することを課題とするものである。  It is an object of the present invention to provide a fire expansion two-layer pipe joint with a thermal expansion blockage promoting type that eliminates such inconvenience for blockage of the pipe, is easy to construct, can be easily manufactured, and can be obtained at low cost. .

本発明では、上記課題を解決すべく、耐火二層管継手の受け口形の接続口を備えた合成樹脂製の継手内管の外周面に、繊維混入モルタルの被覆層を形成するとともに該被覆層の内側に火災の熱により膨張して管路の遮断のために該内管を押し潰す熱膨張手段を継手内管の外周面に捲回して埋設したものに於いて、該熱膨張手段を、内三つ折りしたテープにより形成した管内方向へ膨張可能な薄手の帯状袋に粉末の熱膨張剤を収容したもので構成し、その帯状袋の折り片側の面を上記継手内管の外周面に当接させて巻き付け、粘着テープを該帯状袋の上面を覆った状態で継手内管の外周面に貼着した。 In the present invention, in order to solve the above-mentioned problems, a coating layer of fiber-mixed mortar is formed on the outer peripheral surface of a synthetic resin joint inner pipe provided with a receptacle-type connection port of a fireproof two-layer pipe joint, and the coating layer The thermal expansion means that is expanded by the heat of the fire and crushes the inner pipe to block the pipe is wound around the outer peripheral surface of the joint inner pipe, and the thermal expansion means is It is composed of a thin band-shaped bag that is inflated in the direction of the tube formed by tape folded inside, containing a powder thermal expansion agent, and the surface of the folded piece side of the band-shaped bag is brought into contact with the outer peripheral surface of the joint inner tube. The adhesive tape was stuck to the outer peripheral surface of the joint inner pipe in a state of covering the upper surface of the belt-like bag .

上記帯状袋を、熱伝導性がよく、薄くて比較的柔軟で且つ形状保持性があり、耐火性の良いアルミニウムにより形成し、或いは、帯状袋の内面に接着剤層を設けてこれに粉末の熱膨張剤を付着固定し、或いは、上記熱膨張手段を、上記継手内管の接続口の奥部に対応した外周面に設けた構成とすることもできる。  The belt-like bag is made of aluminum having good thermal conductivity, thin, relatively flexible and shape-retaining properties, and good fire resistance. Alternatively, an adhesive layer is provided on the inner surface of the belt-like bag and the powder bag A thermal expansion agent may be adhered and fixed, or the thermal expansion means may be provided on the outer peripheral surface corresponding to the inner portion of the connection port of the joint inner pipe.

この熱膨張閉塞促進型耐火二層管継手は、合成樹脂製の継手内管の受け口形の接続口の外周面に、粉末の熱膨張剤を収容したアルミニウム製の薄手の膨張可能な帯状袋を巻き付けて固定し、この継手内管を金型内に収め、継手内管と金型内面との間の空間に繊維混入モルタルを注入して繊維混入モルタルの被覆層を形成し、これを金型内から取り出して養生することにより製作され、製作の上で必要なら、上記熱膨張手段をその上面を覆った粘着テープにより継手内管に貼着してもよい。配管コストを削減するために、この耐火二層管継手に接続される配管を、合成樹脂製の管又は合成樹脂製の透明管としてもよい。  This thermal expansion blockage promotion type fireproof two-layer pipe joint has a thin inflatable strip bag made of aluminum containing a powder thermal expansion agent on the outer peripheral surface of the receiving port of the joint pipe made of synthetic resin. The joint inner pipe is placed in a mold, and the fiber mixed mortar is injected into the space between the joint inner pipe and the mold inner surface to form a coating layer of the fiber mixed mortar. The heat expansion means may be attached to the joint inner pipe with an adhesive tape covering the upper surface of the heat expansion means if necessary for manufacture. In order to reduce the piping cost, the pipe connected to the fireproof two-layer pipe joint may be a synthetic resin pipe or a synthetic resin transparent pipe.

本発明の熱膨張閉塞促進型耐火二層管継手は、これに継手内管が軟化するような火災の熱が作用したとき、熱膨張手段を構成する帯状袋内の粉末の熱膨張剤が膨張して該継手内管を押し潰し、継手内管による管路の閉塞を促進するもので、耐火二層管継手の受け口形の接続口を備えた合成樹脂製の継手内管の外周面に繊維混入モルタルの被覆層を形成するとともに該被覆層の内側に埋設される熱膨張手段を、管内方向へ膨張可能な薄手の帯状袋に粉末の熱膨張剤を収容して構成したので、従来の熱膨張性耐火材のように加硫ゴムや亜リン酸アルミニウムなどの添加物が不要で成形加工なども省略でき、比較的安価な帯状袋と熱膨張性黒鉛の粉末で製作できるから、高倍率の膨張が得られると共に製作コストが廉価になり、帯状袋は被覆層の内側に位置するので外力から保護されて変形や破損のおそれもなく、長期に亘って閉塞機能を維持できる。また、配管施工に際して熱膨張手段を取付けるための装置や取付け作業が要らないから、施工を迅速容易に行える。  The thermal expansion blockage-acceleration type fireproof double-layer pipe joint of the present invention expands the thermal expansion agent of the powder in the belt-shaped bag constituting the thermal expansion means when the heat of the fire that softens the joint inner pipe acts on this. The joint inner pipe is crushed to promote the blockage of the pipe line by the joint inner pipe, and the fiber is formed on the outer peripheral surface of the synthetic resin joint inner pipe provided with a receiving port connection port of the fireproof two-layer pipe joint. The thermal expansion means that forms the coating layer of the mixed mortar and is embedded inside the coating layer is configured by accommodating the powder thermal expansion agent in a thin belt-like bag that can be expanded in the tube direction. Additives such as vulcanized rubber and aluminum phosphite are not required like inflatable refractory materials, and molding can be omitted, and it can be manufactured with relatively inexpensive belt-like bags and thermally expandable graphite powder. Inflation is achieved and the manufacturing cost is low, and the belt is Guaranteed It also deformation or damage is protected from external forces so positioned, occlusion function for a long time can be maintained. In addition, since the apparatus for attaching the thermal expansion means and the installation work are not required at the time of piping construction, the construction can be performed quickly and easily.

該熱膨張手段を構成する帯状袋を内三つ折りしたテープにより形成し、その折り片側の面を継手内管の外周面に当接させて設けると、粉末の熱膨張剤の膨張時に折り片部分が押されて緩むので帯状袋が小さな抵抗で膨張することができ、膨張する熱膨張剤の粉末の飛散を抑止しつつ軟化した継手内管を確実に押し潰して管路の閉塞を促進できる。 When the belt-like bag constituting the thermal expansion means is formed of a tape folded in three, and the surface on the side of the folded piece is provided in contact with the outer peripheral surface of the inner pipe of the joint, the folded piece portion is expanded when the thermal expansion agent of the powder is expanded. since pushed loosening can strip bag is inflated with a small resistance, Ru can promote occlusion of reliably crushed by pipe fittings within tube was softened while suppressing scattering of powder of expanded thermally expanding agent .

上記帯状袋をアルミニウムにより形成すると、熱伝導性や耐火性が良いので温度に応じて迅速に熱膨張剤を膨張させることができ、形状保持性や防湿性も良く被覆層が形成し易くしかも耐久性の良い帯状袋が得られる。  When the belt-like bag is made of aluminum, it has good thermal conductivity and fire resistance, so the thermal expansion agent can be expanded quickly according to the temperature, shape retention and moisture resistance are good, and the coating layer is easy to form and durable. A good belt bag is obtained.

上記帯状袋の内面に接着剤層を設けてこれに粉末の熱膨張剤を付着固定することで、袋内の熱膨張剤の粉末が片寄らず全体に均一に位置させることができ、製作時や運搬時、施工時の振動や衝撃の対しても粉末が安定するので、継手内管をその周囲から均一に押し潰して迅速な閉塞作動を行える。  By providing an adhesive layer on the inner surface of the belt-like bag and attaching and fixing a powder thermal expansion agent thereto, the thermal expansion agent powder in the bag can be uniformly positioned throughout the bag, Since the powder is stable against vibrations and shocks during transportation and construction, the inner pipe of the joint can be uniformly crushed from its surroundings to perform a quick closing operation.

上記継手内管は受け口形の接続口が形成されたものであり、接続口の奥部は段部が形成されるため口径が小さいので、この奥部に対応した外周面に上記熱膨張手段を設けると、口径の大きい接続口の周囲に設けた場合よりも短時間で管路の閉塞促進を行える。  Since the inner pipe of the joint is formed with a receptacle-type connection port, and the inner diameter of the connection port is small because the step portion is formed, the thermal expansion means is provided on the outer peripheral surface corresponding to the inner part. When provided, the blockage of the pipeline can be promoted in a shorter time than when provided around the connection port having a large diameter.

耐火二層管継手は、合成樹脂製の継手内管を金型に収め、継手内管と金型内面との間の空間に繊維混入モルタルを注入して繊維混入モルタルの被覆層を形成し、これを金型から取り出して養生することにより製作されるが、この継手内管の受け口形の接続口の外周面に、粉末の熱膨張剤を収容したアルミニウム製の薄手の膨張可能な帯状袋を巻き付けて固定しておくことで、金型内のモルタルの流れにより袋が変形したり熱膨張剤が移動したりすることもなく、モルタルの流れを損なわずに成形性のよい加工が行える。この熱膨張手段は、その上面全体を覆うようなクラフトテープやアルミガラスクロスの粘着テープにより継手内管に貼着することで、金型内のモルタルの流れを損なわず、モルタルの流れによる袋の変形が防止できる。  Fireproof double-layer pipe joint is a synthetic resin joint inner pipe placed in a mold, and fiber mixed mortar is injected into the space between the joint inner pipe and the mold inner surface to form a coating layer of fiber mixed mortar, It is manufactured by taking it out of the mold and curing it, but on the outer peripheral surface of the receptacle-type connection port of this joint inner pipe is a thin inflatable strip bag made of aluminum containing a powder thermal expansion agent. By winding and fixing, the bag does not deform or the thermal expansion agent moves due to the flow of mortar in the mold, and processing with good moldability can be performed without impairing the flow of mortar. This thermal expansion means is affixed to the inner pipe of the joint with an adhesive tape of craft tape or aluminum glass cloth that covers the entire upper surface, so that the flow of the mortar in the mold is not impaired, and the bag Deformation can be prevented.

上記耐火二層管継手には熱膨張手段が備わっているので、この継手に接続される配管に、耐火性の乏しい合成樹脂製の管或いは合成樹脂製の透明管を選択しても火災に対する安全性を維持でき、配管コストを低廉化できる。また、前記した構成の帯状袋は、継手以外の他の構成の防火用配管遮断装置に転用することが可能である。 The fireproof double-layer pipe joint is equipped with thermal expansion means, so it is safe against fire even if a synthetic resin pipe or a synthetic resin transparent pipe with poor fire resistance is selected as the pipe connected to the joint. Performance can be maintained and piping costs can be reduced. Further, the belt-like bag having the above-described configuration can be diverted to a fire prevention pipe shut-off device having a configuration other than the joint.

本発明の実施の形態を別紙図面に基づき説明すると、図１及び図２に於いて符号１は耐火二層管継手の受け口形の接続口２を備えたポリ塩化ビニール製の継手内管を示し、この継手内管１の外周面には熱膨張手段３が設けられ、更に図３に示すように繊維混入モルタルの被覆層４を該外周面に形成することで熱膨張閉塞促進型耐火二層管継手５が得られる。こうした構成は従来の熱膨張閉塞促進型耐火二層管継手の構成と特に変わりが無く、図４に示すように床スラブなどの防火区画６を貫通して設置され、火災の際には背面が固い被覆層４でバックアップされた熱膨張手段３が膨張し、火災の熱で軟化した継手内管１を押し潰すことを促進して管路を閉塞することも従来のものと同様であるが、本発明のものは、該熱膨張手段３を、図５及び図６に示すような、継手内管の管内方へ膨張可能な内三つ折りした薄手の帯状袋７に粉末の熱膨張剤８を収容して構成し、これを粘着テープで覆って継手内管の外周面に貼着したことを特徴とするもので、この特徴ある構成とすることにより安価に継手６を製作でき、熱膨張手段３を設けた継手内管１を金型（図示してない）に収めて継手５を製作するとき、良好な繊維混入モルタルの流れを生じさせると共に帯状袋７の変形を起こさずにきれいな被覆層４を形成できる。 The embodiment of the present invention will be described with reference to the accompanying drawings. In FIGS. 1 and 2, reference numeral 1 denotes a polyvinyl chloride joint inner pipe having a receiving port 2 of a fireproof two-layer pipe joint. Further, a thermal expansion means 3 is provided on the outer peripheral surface of the inner pipe 1 of this joint, and further, as shown in FIG. A pipe joint 5 is obtained. Such a configuration is not particularly different from the conventional thermal expansion blockage-promoting fireproof two-layer pipe joint, and is installed through a fireproof section 6 such as a floor slab as shown in FIG. Although the thermal expansion means 3 backed up by the hard coating layer 4 expands and crushes the inner pipe 1 that has been softened by the heat of the fire, the pipe is closed as in the conventional case. According to the present invention, the thermal expansion means 3 is provided with a powder thermal expansion agent 8 in a thin belt-like bag 7 that is internally folded and can be expanded inward of the pipe of the joint inner pipe as shown in FIGS. It is characterized by being housed , covered with adhesive tape, and pasted on the outer peripheral surface of the joint inner pipe . By using this characteristic structure, the joint 6 can be manufactured at low cost, and thermal expansion is achieved. When the joint inner pipe 1 provided with the means 3 is housed in a mold (not shown), the joint 5 is manufactured. To form a beautiful coating layer 4 without causing deformation of the strip-like pouch 7 with create a flow of good fiber mixing mortar.

該熱膨張手段３を構成する帯状袋７は、熱膨張剤８の膨張を妨げない程度の柔軟性と熱膨張剤８が漏れ出さない程度の丈夫さと耐火性を有するもので製作され、図６に示した例では、断面形状を有する内三つ折りしたアルミニウムフィルム製のテープ９により形成され、その折り片側の面１０を該継手内管１の外周面に当接させて図１のように周回し、該帯状袋７の上面にクラフトテープ製の粘着テープ１９を貼着して外周面に固定した。折り片側の面１０は、図３に示すように継手内管１の外周面に対して接しているだけであるから、その内部の熱膨張剤８が膨張する際には面１０を管内方向へ押し膨らませて比較的自由に膨張することができ、軟化した継手内管１を強く押し潰すことができる。その状態は図７に示す如くであり、熱で軟化した継手内管１が熱膨張剤８の膨張力で押されて管内方向へせり出し、火災の煙や火炎が流通しないように管内を閉塞する。  The belt-like bag 7 constituting the thermal expansion means 3 is manufactured with a flexibility that does not hinder the expansion of the thermal expansion agent 8, a strength that does not leak out the thermal expansion agent 8, and fire resistance. In the example shown in FIG. 1, the tape is made of a three-folded aluminum film having a cross-sectional shape, and the surface 10 on the side of the folded piece is brought into contact with the outer peripheral surface of the joint inner pipe 1 so as to circulate as shown in FIG. And the adhesive tape 19 made from a craft tape was stuck on the upper surface of this belt-like bag 7, and it fixed to the outer peripheral surface. Since the surface 10 on the folded piece side is only in contact with the outer peripheral surface of the joint inner pipe 1 as shown in FIG. 3, when the thermal expansion agent 8 in the interior expands, the surface 10 is moved in the pipe inner direction. The joint inner pipe 1 can be squeezed strongly by being expanded by being pushed and expanded relatively freely. The state is as shown in FIG. 7, and the joint inner pipe 1 softened by heat is pushed by the expansion force of the thermal expansion agent 8 and protrudes in the pipe inner direction so as to block the inside of the pipe so that fire smoke and flame do not flow. .

熱膨張黒鉛などの熱膨張剤８は通常は粉末であり、このままでは取り扱いが面倒で取り付けも難しいため従来は各種材料を混合して所望の形状に加工成形して使用するのが一般的で、このような処理のために熱膨張手段３が高価になっていたが、本発明の如く薄手の帯状袋７の構成とすることで粉末の熱膨張剤８の単体をそのまま利用でき、非熱膨張物が混入していないので高倍率の膨張が得られるようになる。この実施例では、酸化処理した黒鉛粉末（市販品 エア・ウオーター・ケミカル（株）製 商品名ＳＳ−３）を熱膨張剤８として使用した。この黒鉛は、１ｇは１．５ｃｃで２６０℃になると約３３０ｃｃ以上に膨張する特性を有する。図１の継手内管１に適用した例では、厚さ２０ミクロン、幅１０．０ｃｍ、長さ４５０ｃｍのアルミニウムフィルム製テープにより帯状袋７を作成し、その内部に１０ｇの熱膨張性黒鉛の熱膨張剤８を均一に分散させて収容した。  The thermal expansion agent 8 such as thermal expansion graphite is usually a powder, and it is generally difficult to handle and difficult to install. The thermal expansion means 3 has become expensive due to such a process, but by using the thin belt-like bag 7 as in the present invention, the powder thermal expansion agent 8 alone can be used as it is, and the non-thermal expansion is performed. Since no object is mixed, high magnification expansion can be obtained. In this example, oxidized graphite powder (commercial name, product name SS-3, manufactured by Air Water Chemical Co., Ltd.) was used as the thermal expansion agent 8. This graphite has a characteristic that 1 g of 1.5 cc expands to about 330 cc or more at 260 ° C. In the example applied to the joint inner pipe 1 of FIG. 1, a belt-like bag 7 is made of an aluminum film tape having a thickness of 20 microns, a width of 10.0 cm, and a length of 450 cm, and 10 g of thermally expandable graphite The swelling agent 8 was uniformly dispersed and accommodated.

本発明の熱膨張閉塞促進型耐火二層管継手５として、図４に見られるように、縦管１１を接続のための上下の接続口２、２の他に横枝管１２、１２が接続される枝管接続口１３、１３を備えた集合管形状のものを説明したが、図１１に示したような縦管の下端に接続される脚部継手形状のものなどの耐火二層管継手にも適用できる。また、これらの縦管１１や横枝管１２は、内管が合成樹脂管で外管が繊維混入モルタル管からなる耐火二層管（図示してない）であることが防火上は好ましいが、非耐火性の合成樹脂管を使用しても熱膨張手段３が設けられているため火災の煙などが防火区画６を越えて上層階へ及ぶことを防止できる。  As shown in FIG. 4, as the thermal expansion blockage promoting type fireproof two-layer pipe joint 5 of the present invention, in addition to the upper and lower connection ports 2 and 2 for connecting the vertical pipe 11, the lateral branch pipes 12 and 12 are connected. Although the collection pipe-shaped one provided with the branch pipe connection ports 13, 13 has been described, a fireproof two-layer pipe joint such as a leg joint-shaped one connected to the lower end of the vertical pipe as shown in FIG. It can also be applied to. In addition, these vertical pipes 11 and horizontal branch pipes 12 are preferably fire-resistant double-layer pipes (not shown) in which the inner pipe is a synthetic resin pipe and the outer pipe is a fiber-mixed mortar pipe. Even if a non-fire resistant synthetic resin pipe is used, the thermal expansion means 3 is provided, so that it is possible to prevent fire smoke and the like from reaching the upper floors beyond the fire prevention section 6.

図８に参考例として示した帯状袋７は、アルミニウムフィルム製の一対の二つ折りテープ１５で構成し、その一方の二つ折りテープ１５aに熱膨張剤８を収容し、テープ１５aの開口部に、他方の二つ折りテープ１５bを入り組ませて塞いで構成したもので、熱膨張剤８の膨張時は二つ折りテープ１５の側方が張り出して膨張し、継手内管１が管内を閉塞することを促進援助する。
また、図９及び図１０に参考例として示した帯状袋７は、熱膨張剤８の収容部１６とこれに連らなる蛇腹部１７を有する断面形状にアルミニウムフィルム製のテープにより構成したもので、蛇腹部側の面１８を継手内管１の外周面に当接するように設け、熱膨張剤８の膨張時は蛇腹部１７が張り出して継手内管１の閉塞を促進するように作動する。蛇腹部１７の先端部は、必要に応じて折り曲げ加工や封止加工が施される。
これらの帯状袋７は前記三つ折りの帯状袋と同様の外形寸法に製作される。 The belt-like bag 7 shown as a reference example in FIG. 8 is composed of a pair of bi-fold tapes 15 made of aluminum film, the thermal expansion agent 8 is accommodated in one of the bi-fold tapes 15a, and the opening of the tape 15a The other half-folded tape 15b is inserted and closed, and when the thermal expansion agent 8 is expanded, the side of the double-folded tape 15 protrudes and expands, and the joint inner pipe 1 closes the inside of the pipe. Help promote.
Moreover, the belt-like bag 7 shown as a reference example in FIGS. 9 and 10 is configured by a tape made of an aluminum film in a cross-sectional shape having a housing portion 16 for the thermal expansion agent 8 and a bellows portion 17 connected to the housing portion 16. The bellows portion-side surface 18 is provided so as to abut on the outer peripheral surface of the joint inner pipe 1, and the thermal bellows portion 17 projects when the thermal expansion agent 8 expands, and operates to promote the closing of the joint inner pipe 1. The tip portion of the bellows portion 17 is subjected to bending processing or sealing processing as necessary.
These strip-like pouch 7 Ru fabricated similar external dimensions and strip-like pouch of the tri-fold.

これらの帯状袋７内に均一に分散させて熱膨張剤８を収容することは比較的難しく、帯状袋７を耐火二層管継手５に取付けた後には輸送などの振動により粉末の熱膨張剤８が偏ってしまい、十分に膨張機能を発揮できなくなることが考えられ、こうした不都合を防ぐために帯状袋７の内面に接着剤層（図示してない）を設けてこれに粉末の熱膨張剤を付着固定することが望ましい。  It is relatively difficult to uniformly disperse the thermal expansion agent 8 in the belt-like bags 7, and after the belt-like bag 7 is attached to the fireproof double-layer pipe joint 5, the powder thermal expansion agent is generated by vibrations such as transportation. In order to prevent such inconvenience, an adhesive layer (not shown) is provided on the inner surface of the belt-like bag 7 and a thermal expansion agent in the form of powder is applied thereto. It is desirable to adhere and fix.

熱膨張手段３を構成する帯状袋７は、継手内管１の外周を取り巻いて設けられるが、この熱膨張手段３を、図３のように継手内管１の受け口形の接続口２の奥部の段部に対応した外周面に設けると、継手内管１の内径が接続口２の前方部分よりも小さくなっているため、熱膨張手段３が膨張開始して管内を閉塞するまで時間を短くすることができ、安全性が高まる。  The belt-like bag 7 constituting the thermal expansion means 3 is provided so as to surround the outer periphery of the joint inner pipe 1, and this thermal expansion means 3 is connected to the inner side of the connection port 2 of the joint inner pipe 1 as shown in FIG. 3. Since the inner diameter of the joint inner pipe 1 is smaller than that of the front portion of the connection port 2, it takes time until the thermal expansion means 3 starts to expand and closes the inside of the pipe. It can be shortened and safety is increased.

本発明の熱膨張閉塞促進型耐火二層管継手５は、ポリ塩化ビニール製の継手内管１の受け口形の接続口２の外周面に、熱膨張性黒鉛の粉末のみからなる熱膨張剤８を収容したアルミニウムフィルム製の薄手の膨張可能な帯状袋７を巻き付けて固定し、この帯状袋７が取付けられた継手内管１を金型（図示してない）内に収め、従来の耐火二層管継手の製作と同様に継手内管１と金型内面との間の空間に繊維混入モルタルを注入して繊維混入モルタルの被覆層４を形成し、これを金型内から取り出して養生することにより製作した。この場合は、帯状袋７は熱膨張する粉末の熱膨張剤８のみを収容するので、薄手に構成でき、継手内管１の外周面に取付けても金型内での繊維混入モルタルの流れをあまり妨げず、きれいな被覆層４を形成できる。熱膨張手段３の帯状袋７は、その上面を覆って設けた粘着テープ１９により継手内管１の外周面に貼着し、帯状袋７の前面が軟化した継手内管１を押して膨張することが許容されるようにした。  The thermal expansion blockage type fireproof double-layer pipe joint 5 of the present invention has a thermal expansion agent 8 made of only a powder of thermal expansive graphite on the outer peripheral surface of the receptacle-type connection port 2 of the joint pipe 1 made of polyvinyl chloride. A thin inflatable belt-like bag 7 made of an aluminum film containing the wire is wrapped and fixed, and the joint inner pipe 1 to which the belt-like bag 7 is attached is placed in a mold (not shown), and the conventional fireproof two Similar to the production of the layered pipe joint, the fiber-mixed mortar is injected into the space between the joint inner pipe 1 and the mold inner surface to form the fiber-mixed mortar coating layer 4, which is taken out from the mold and cured. Produced by In this case, since the belt-like bag 7 contains only the thermal expansion agent 8 of the thermally expanding powder, it can be configured thinly, and even if it is attached to the outer peripheral surface of the joint inner pipe 1, the flow of the fiber-mixed mortar in the mold A clean coating layer 4 can be formed without much interference. The belt-like bag 7 of the thermal expansion means 3 is adhered to the outer peripheral surface of the joint inner tube 1 with an adhesive tape 19 provided so as to cover the upper surface, and the front surface of the belt-like bag 7 is expanded by pushing the softened inner tube 1. Was allowed.

本発明の耐火二層管継手５は、継手本体に被覆層４で覆って管路閉塞のための熱膨張手段３が設けられているから、これに接続される配管、例えば横枝管１２に安価な合成樹脂製の管を使用しても熱膨張手段３が作動している間は火災により横枝管１２が破損することはなく、配管コストを低廉化できる。  The fireproof two-layer pipe joint 5 of the present invention is provided with a thermal expansion means 3 for covering a pipe line by covering the joint body with a coating layer 4. Even if an inexpensive synthetic resin pipe is used, the side branch pipe 12 is not damaged by a fire while the thermal expansion means 3 is operating, and the piping cost can be reduced.

熱膨張性黒鉛（エア・ウオーター・ケミカル（株）製 ＳＳ−３）１０ｇをアルミニウムフィルムテープにより製作した図７の断面形状を有する帯状袋７に均一に収容し、これを継手内管１の接続口２の奥部に捲き付け、アルミガラスクロスの粘着テープ１９で固定した。接続口２の口径は１００ｍｍである。これを金型内に収容し、継手内管１と金型内面との隙間に繊維混入モルタルを注入して被覆層４を形成した。金型を解体して被覆層４の形成された継手内管１を取り出し、養生して熱膨張閉塞促進型耐火二層管継手５を作製した。
この継手５を図４のように防火区画６にモルタルで埋設し、縦管１１には耐火二層管を接続するとともに横枝管１２にポリ塩化ビニールの管を接続した。
そして継手５の下方の室をＩＳＯ８３４−１の標準加熱曲線にしたがって加熱したところ、２０分経過の時点で継手内管１が軟化し始め、２５分経過したとき熱膨張剤８が膨張して継手内管１を押し潰し、管路内が軟化した継手内管１により閉塞された。この閉塞状態は１時間１５分経過するまで継続し、この間、継手内管１は炭化するも上方の縦管や横枝管１２には変化が無かった。10 g of thermally expandable graphite (SS-3 manufactured by Air Water Chemical Co., Ltd.) is uniformly accommodated in the belt-like bag 7 having the cross-sectional shape shown in FIG. It was rubbed at the back of the mouth 2 and fixed with an adhesive tape 19 of an aluminum glass cloth. The diameter of the connection port 2 is 100 mm. This was accommodated in a mold, and fiber-mixed mortar was injected into the gap between the joint inner pipe 1 and the inner surface of the mold to form a coating layer 4. The mold was disassembled to take out the joint inner pipe 1 on which the coating layer 4 was formed, and was cured to produce a thermal expansion blockage promotion type fireproof two-layer pipe joint 5.
As shown in FIG. 4, the joint 5 was embedded in the fire prevention section 6 with mortar, and the vertical pipe 11 was connected with a fire-resistant double-layer pipe and the horizontal branch pipe 12 was connected with a polyvinyl chloride pipe.
When the chamber below the joint 5 was heated in accordance with the standard heating curve of ISO 834-1, the joint inner pipe 1 began to soften after 20 minutes, and when 25 minutes passed, the thermal expansion agent 8 expanded and the joint The inner pipe 1 was crushed, and the inside of the pipe line was closed by the softened inner pipe 1. This closed state continued until 1 hour and 15 minutes passed. During this time, the inner pipe 1 was carbonized, but there was no change in the upper vertical pipe or the horizontal branch pipe 12.

帯状袋７の材料として、例えばセラミックペーパーなども使用できる。また、図示した各種の帯状袋７は、熱膨張剤収容装置として他の構成の防火用配管遮断装置に適用できる。  As a material for the belt-like bag 7, for example, ceramic paper can be used. Moreover, the various belt-shaped bags 7 shown in the figure can be applied to a fire prevention pipe shut-off device having another configuration as a thermal expansion agent storage device.

本発明の熱膨張閉塞促進型耐火二層管継手を構成する継手内管に帯状袋を取付けた状態の側面図The side view of the state which attached the strip | belt-shaped bag to the joint inner pipe which comprises the thermal expansion obstruction | occlusion promotion type fireproof two-layer pipe joint of this invention 図１の一部切断側面図Partial cut side view of FIG. 図１の継手内管に被覆層を形成した状態の一部切断側面図FIG. 1 is a partially cut side view showing a state in which a coating layer is formed on the inner pipe of FIG. 本発明の熱膨張閉塞促進型耐火二層管継手の使用状態の側面図The side view of the use condition of the thermal expansion blockage promotion type fireproof two-layer pipe joint of the present invention 帯状袋の正面図Front view of belt bag 図５の拡大断面図Enlarged sectional view of FIG. 作動状態の説明図Illustration of operating state 帯状袋の参考例の断面図Sectional view of a reference example of a belt bag 帯状袋の他の参考例の断面図Sectional view of another reference example of belt-like bag 図９の帯状袋の作動状態の断面図Sectional drawing of the operating state of the belt-like bag of FIG. 本発明の熱膨張閉塞促進型耐火二層管継手の他の実施例の一部切断側面図The partially expanded side view of the other Example of the thermal expansion obstruction | occlusion promotion type fireproof two-layer pipe joint of this invention

符号の説明Explanation of symbols

１ 継手内管、２ 接続口、３ 熱膨張手段、４ 被覆層、５ 熱膨張閉塞促進型耐火二層管継手、７ 帯状袋、８ 熱膨張剤、９ テープ、１０ 折り片側の面、１５ 二つ折りテープ、１５ａ 一方の二つ折りテープ、１５ｂ 他方の二つ折りテープ、１６ 収容部、１７ 蛇腹部、１８ 蛇腹部側の面、１９ 粘着テープ、  1 Joint inner pipe, 2 connection port, 3 thermal expansion means, 4 coating layer, 5 thermal expansion blockage promotion type fireproof two-layer pipe joint, 7 strip bag, 8 thermal expansion agent, 9 tape, 10 fold piece side surface, 15 2 Folding tape, 15a One half folding tape, 15b The other half folding tape, 16 receiving part, 17 bellows part, 18 surface of bellows part, 19 adhesive tape,

Claims (4)

耐火二層管継手の受け口形の接続口を備えた合成樹脂製の継手内管の外周面に、繊維混入モルタルの被覆層を形成するとともに該被覆層の内側に火災の熱により膨張して管路の遮断のために該内管を押し潰す熱膨張手段を継手内管の外周面に捲回して埋設したものに於いて、該熱膨張手段を、内三つ折りしたテープにより形成した管内方向へ膨張可能な薄手の帯状袋に粉末の熱膨張剤を収容したもので構成し、その帯状袋の折り片側の面を上記継手内管の外周面に当接させて巻き付け、粘着テープを該帯状袋の上面を覆った状態で継手内管の外周面に貼着したことを特徴とする熱膨張閉塞促進型耐火二層管継手。 A coating layer of fiber-mixed mortar is formed on the outer peripheral surface of a synthetic resin joint inner pipe having a receptacle-type connection port for a fireproof two-layer pipe joint, and the pipe is expanded by the heat of the fire inside the coating layer. The thermal expansion means for crushing the inner pipe for blocking the path is wound around the outer peripheral surface of the joint inner pipe, and the thermal expansion means is directed in the direction of the pipe formed by the internally folded tape. An inflatable thin band-shaped bag containing a thermal expansion agent in the form of a powder, the fold piece side surface of the band-shaped bag is brought into contact with the outer peripheral surface of the inner pipe of the joint, and the adhesive tape is attached to the band-shaped bag. A thermal expansion blockage-promoting fireproof two-layer pipe joint characterized by being attached to the outer peripheral surface of the joint inner pipe in a state of covering the upper surface of the pipe. 上記熱膨張手段を、上記継手内管の接続口の奥部に対応した外周面に設けたことを特徴とする請求項１に記載の熱膨張閉塞促進型耐火二層管継手。 The thermal expansion blockage-promoting fireproof two-layer pipe joint according to claim 1 , wherein the thermal expansion means is provided on an outer peripheral surface corresponding to a back portion of the connection port of the joint inner pipe . 上記帯状袋をアルミニウムにより形成したことを特徴とする請求項１に記載の熱膨張閉塞促進型耐火二層管継手。 2. The thermal expansion and closure promotion type fireproof two-layer pipe joint according to claim 1 , wherein the belt-like bag is made of aluminum . 上記帯状袋の内面に接着剤層を設けてこれに粉末の熱膨張剤を付着固定したことを特徴とする請求項１に記載の熱膨張閉塞促進型耐火二層管継手。 2. The thermal expansion blockage-promoting fireproof two-layer pipe joint according to claim 1, wherein an adhesive layer is provided on the inner surface of the belt-like bag, and a powder thermal expansion agent is adhered and fixed thereto .
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JP5576349B2 (en) * 2011-10-31 2014-08-20 シーシーアイ株式会社 Fireproof plugging composite material, fireproof plugging composite built-in fire spread prevention device, and pipe joint or sleeve provided with fireproof plugging composite material
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