JP4415307B2 - Pipe line blocking member and connecting member for gas piping - Google Patents

Pipe line blocking member and connecting member for gas piping Download PDF

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JP4415307B2
JP4415307B2 JP2003377154A JP2003377154A JP4415307B2 JP 4415307 B2 JP4415307 B2 JP 4415307B2 JP 2003377154 A JP2003377154 A JP 2003377154A JP 2003377154 A JP2003377154 A JP 2003377154A JP 4415307 B2 JP4415307 B2 JP 4415307B2
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thermal expansion
gas
pipe line
expansion member
pipe
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仁 丹生
康 遠山
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Proterial Ltd
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Hitachi Metals Ltd
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本発明は、火災時にガスの管路を閉止する管路遮断部材及びそれを内蔵したガス配管用接続部材に関する。   The present invention relates to a pipe line blocking member that closes a gas pipe line in the event of a fire and a gas pipe connecting member that incorporates the pipe line blocking member.

地中に埋設されたガス管（例えばＰＥ管）と地上のガスメータとを配管接続する場合、例えば、ＰＥ管に金属管（外面を樹脂で被覆した鋼管）を接続し、この樹脂被覆鋼管を地上に立ち上げてガスメータに配管接続することが行われている。この場合、ガスメータの入口側では、樹脂被覆鋼管はガス栓及びガスメータ用継手を介してガスメータの入口に接続され、またガスメータの出口は、ガスメータ用継手及び試験用チーを介して樹脂被覆鋼管と接続される。上記のガスメータ廻りの接続部を構成するガスメータ用継手、ガス栓及び試験用チーは火災が発生してもガス漏れが生じないようにするために、本体は、耐火性を有する金属（例えば炭素鋼）で形成されている。しかるに、気密性を保持するために、その内部にゴム製のシール部材が設けられているので、火災によりシール部材が消失して、上記接続部からのガス漏れが生ずる恐れがある。
火災等によるガス配管接続部からのガス漏れを無くすために、特許文献１には、送給管路に、例えば中空筒状の熱膨張部材を設けて、その部材が熱膨張して送給管路を遮断することが提案されている。この種の熱膨張部材は、特許文献２及び特許文献３に記載されている。 When connecting a gas pipe (for example, PE pipe) buried in the ground and a gas meter on the ground, for example, a metal pipe (steel pipe whose outer surface is coated with resin) is connected to the PE pipe, and this resin-coated steel pipe is connected to the ground. The pipe is connected to a gas meter. In this case, on the gas meter inlet side, the resin-coated steel pipe is connected to the inlet of the gas meter via a gas stopper and a fitting for the gas meter, and the outlet of the gas meter is connected to the resin-coated steel pipe via a fitting for the gas meter and a test tee. Is done. The gas meter joint, gas plug, and test tee constituting the connection around the gas meter are made of a metal having fire resistance (for example, carbon steel) so that no gas leakage occurs even if a fire occurs. ). However, in order to maintain airtightness, a rubber seal member is provided inside the seal member. Therefore, the seal member may disappear due to a fire and gas leakage from the connection portion may occur.
In order to eliminate gas leakage from the gas pipe connection due to fire or the like, in Patent Document 1, for example, a hollow cylindrical thermal expansion member is provided in the supply pipe line, and the member is thermally expanded to supply pipe It has been proposed to block the road. This type of thermal expansion member is described in Patent Document 2 and Patent Document 3.

特開２００１−２５２３６６号公報（第３−４頁、図１、図２)JP 2001-252366 A (page 3-4, FIG. 1 and FIG. 2) 実公平１−２３０２２号公報（第２−３頁)Japanese Utility Model Publication No. 1-23022 (page 2-3) 特開平８−１７８１５０号公報（第３−４頁)JP-A-8-178150 (page 3-4)

特許文献１に記載された熱膨張部材は、ガスが流動している状態で、例えば８００℃程度の高温に急激に曝されると、その膨張速度が速いので、内側に膨張してガス管路を遮断することができる。また熱膨張部材の容積を大きくすることにより、ガスが遮断される時間を長くすることができる。しかるに実際の火災では、ガスが流動しているので、熱膨張部材にはガス圧が作用すると共に、配管部の温度は徐々に上昇する。その昇温曲線は、例えば、ＩＳＯ８３４に準じた加熱曲線（加熱後５分経過した時に５７６℃、１０分経過した時に６７８℃、２０分経過した時に７８１℃、３０分経過した時に８４２℃）のようになる。特許文献１に記載された熱膨張部材は、加熱されると、その内部には小孔や隙間が存在する煤の固まり（燃えカス）となり、極めて脆いものとなる。従って、火災により熱膨張部材が徐々に加熱されると、その膨張速度が遅いため、膨張する間に内部の小孔や隙間にガスが流入する（例えば、圧力２．５ＫＰａの都市ガスが５〜１２０ｍ３／Ｈｒの流量で流れる）ことにより、徐々に崩壊して下流側に飛散し、最終的には、ガス管路から消失してしまう。即ち従来の遮断構造は、ガス管路に熱膨張部材のみを設置しているので、一時的に熱膨張部材で管路が遮断されても、流動するガスの圧力により熱膨張部材が消失し、長時間に亘りガスを閉止する機能を持たないという問題がある。 When the thermal expansion member described in Patent Document 1 is rapidly exposed to a high temperature of, for example, about 800 ° C. in a state where the gas is flowing, the expansion rate is fast, so that the thermal expansion member expands inward and forms a gas pipeline. Can be cut off. Further, by increasing the volume of the thermal expansion member, it is possible to lengthen the time during which the gas is shut off. However, in an actual fire, since gas is flowing, gas pressure acts on the thermal expansion member, and the temperature of the piping part gradually increases. The temperature rise curve is, for example, a heating curve according to ISO834 (576 ° C when 5 minutes have passed after heating, 678 ° C when 10 minutes have passed, 781 ° C when 20 minutes have passed, 842 ° C when 30 minutes passed) It becomes like this. When the thermal expansion member described in Patent Document 1 is heated, it becomes a brittle mass (burn residue) having small holes and gaps inside, and becomes extremely brittle. Therefore, when the thermal expansion member is gradually heated by a fire, the expansion rate is slow, so that gas flows into the small holes and gaps inside the expansion member (for example, city gas having a pressure of 2.5 KPa is 5 to 5 It flows at a flow rate of 120 m 3 / Hr), gradually collapses and scatters downstream, and eventually disappears from the gas pipeline. That is, since the conventional blocking structure has only the thermal expansion member installed in the gas pipeline, even if the pipeline is temporarily blocked by the thermal expansion member, the thermal expansion member disappears due to the pressure of the flowing gas, There is a problem that it does not have a function of closing gas for a long time.

従って本発明の目的は、従来の管路遮断部材の問題点を解決し、加熱された熱膨張部材に保形性を付与し、長時間に亘り管路を閉止する機能を有する管路遮断部材を提供することである。   Accordingly, an object of the present invention is to solve the problems of the conventional pipe blocking member, to give shape retention to the heated thermal expansion member, and to close the pipe for a long time. Is to provide.

また、本発明の他の目的は、加熱された熱膨張部材により管路の出口側が閉塞され、長時間に亘り火災時のガス漏れを防止することのできるガス配管用接続部材を提供することである。 Another object of the present invention is the outlet side of the conduit by the heated thermal expansion member is closed, to provide a connecting member for a gas pipe which can prevent gas leakage during a fire for a long time is there.

上記目的を達成するために、本発明の管路遮断部材は、
耐火性を有する筒状の熱膨張部材と、前記熱膨張部材の流体出口側の端部に設けられ前記熱膨張部材を保持する保持部材とを備え、ガスの管路内に装着される管路遮断部材であって、
前記保持部材は、
前記熱膨張部材の端部から前記熱膨張部材の内周面と接触するように挿入され、前記熱膨張部材が膨張したとき前記管路を塞ぐ方向にその根元部から変形し、変形時に先端同士が互いに干渉する長さを有する櫛歯状の変形部と、
前記変形部の根元部から前記熱膨張部材の外周側に折り返された基部と、を備えることを特徴とするものである。
また、本発明の管路遮断部材は、耐火性を有する筒状の熱膨張部材と、前記熱膨張部材の両端部（流体出口側および流体入口側の端部）に設けられ前記熱膨張部材を保持する保持部材とを備え、ガスの管路内に装着される管路遮断部材であって、
前記保持部材は、
前記熱膨張部材の端部から前記熱膨張部材の内周面と接触するように挿入され、前記熱膨張部材が膨張したとき前記管路を塞ぐ方向にその根元部から変形し、変形時に先端同士が互いに干渉する長さを有する櫛歯状の変形部と、
前記変形部の根元部から前記熱膨張部材の外周側に折り返された基部と、を備えることを特徴とするものである。
本発明で使用される耐火性を有する熱膨張部材は、１７０℃以上の温度で熱膨張し、かつ、８００℃以上の高温に曝されても崩壊しない程度の機械的強度をもつ材料で形成される。この熱膨張部材は、筒状に形成されるが、熱膨張した時に管路を塞ぐ状態になるような形状であれば、完全な筒に限らず、その一部を軸方向に沿って切り欠いた筒あるいはアーク形状であってもよい。本発明で使用される保持部材は、耐熱性を有する金属材料で形成される。この種金属材料としては、ＳＵＳ３０４等のオーステナイト系ステンレス鋼、ＳＵＳ４２０等のマルテンサイト系ステンレス鋼、シリコンマンガン鋼、マンガンクロム鋼、Ｆｅ−Ｍｎ−Ｓｉ系、Ｆｅ−Ｎｉ−Ｃｏ−Ｔｉ系及びＦｅ−Ｎｉ−Ｃ系等の形状記憶合金等を用い得るが、８００℃以上の高温に曝されるので、ステンレス系耐熱鋼で形成することが好ましい。 In order to achieve the above object, the pipe line blocking member of the present invention comprises:
A pipe line that is provided in a gas pipe line, and includes a cylindrical heat expansion member having fire resistance, and a holding member that is provided at an end portion on the fluid outlet side of the heat expansion member and holds the heat expansion member A blocking member,
The holding member is
Inserted from the end of the thermal expansion member so as to be in contact with the inner peripheral surface of the thermal expansion member, and when the thermal expansion member expands, it deforms from its root portion in a direction to close the conduit, Comb-shaped deformed portions having lengths that interfere with each other;
And a base portion that is folded back from the base portion of the deformable portion toward the outer peripheral side of the thermal expansion member .
Further, the pipe line blocking member of the present invention includes a cylindrical thermal expansion member having fire resistance, and the thermal expansion member provided at both end portions (end portions on the fluid outlet side and the fluid inlet side) of the thermal expansion member. A holding member for holding, and a pipe blocking member mounted in the gas pipe,
The holding member is
Inserted from the end of the thermal expansion member so as to be in contact with the inner peripheral surface of the thermal expansion member, and when the thermal expansion member expands, it deforms from its root portion in a direction to close the conduit, Comb-shaped deformed portions having lengths that interfere with each other;
And a base portion that is folded back from the base portion of the deformable portion toward the outer peripheral side of the thermal expansion member.
The heat-expandable thermal expansion member used in the present invention is formed of a material having a mechanical strength such that it thermally expands at a temperature of 170 ° C. or higher and does not collapse even when exposed to a high temperature of 800 ° C. or higher. The This thermal expansion member is formed in a cylindrical shape. However, the thermal expansion member is not limited to a complete cylinder, and a part of the thermal expansion member is notched along the axial direction as long as it is in a state of closing the pipe line when thermally expanded. It may be a cylinder or arc shape. The holding member used in the present invention is formed of a heat-resistant metal material. As this kind of metal material, austenitic stainless steel such as SUS304, martensitic stainless steel such as SUS420, silicon manganese steel, manganese chromium steel, Fe-Mn-Si system, Fe-Ni-Co-Ti system and Fe- A shape memory alloy such as Ni—C can be used, but it is preferably formed of a stainless steel heat resistant steel because it is exposed to a high temperature of 800 ° C. or higher.

また、保持部材の形状は、完全な筒に限らず、その一部を軸方向に沿って切り欠いた筒あるいはアーク形状でもよい。 Further, the shape of the holding member is not limited to a complete cylinder, and may be a cylinder or an arc shape in which a part thereof is cut out along the axial direction.

また、上記目的を達成するために、本発明のガス配管用接続部材は、ガスを流動させるガスの管路に設けられ、前記管路を構成する継手本体と、
前記継手本体の内部に設けられ、前記管路が加熱された時に前記管路を閉止する管路遮断部材と、を備えるガス配管用接続部材であって、
前記管路遮断部材は、本発明の管路遮断部材であることを特徴とするものである。 In order to achieve the above-mentioned object, the connecting member for gas piping of the present invention is provided in a gas pipeline for flowing gas, and a joint body constituting the pipeline;
A gas pipe connecting member provided inside the joint body, the pipe line blocking member closing the pipe line when the pipe line is heated,
The pipe line blocking member is the pipe line blocking member of the present invention .

本発明のガス配管用接続部材において、前記継手本体の内周面には、管軸方向に沿って複数の円周溝と、前記各円周溝の間に断面山形状の係合部とが形成され、
前記熱膨張部材の外周面には、管軸方向に沿って前記円周溝に対応する複数の突条部が形成され、
前記管路遮断部材は、前記円周溝と前記突条部とが係合して継手本体の内周面に装填されていることが好ましい。 In the connecting member for gas piping according to the present invention, the inner peripheral surface of the joint body has a plurality of circumferential grooves along the tube axis direction, and an engaging portion having a cross-sectional mountain shape between the circumferential grooves. Formed,
On the outer peripheral surface of the thermal expansion member, a plurality of protrusions corresponding to the circumferential groove is formed along the tube axis direction,
It is preferable that the pipe line blocking member is loaded on the inner peripheral surface of the joint body with the circumferential groove and the protruding portion engaged .

本発明の管路遮断部材によれば、熱膨張部材は管路を塞ぐ方向に変形する保持部材で支持されるので、加熱された熱膨張部材の崩壊が防止され、もって長時間に亘り管路を閉止する機能を維持することができる。   According to the pipe line blocking member of the present invention, since the thermal expansion member is supported by the holding member that deforms in the direction of closing the pipe line, the heated thermal expansion member is prevented from collapsing, and thus the pipe line is extended for a long time. The function of closing can be maintained.

本発明の管路遮断部材によれば、さらに保持部材が、熱膨張部材の内周面と接触するように挿入され、熱膨張部材が膨張したとき管路を塞ぐ方向にその根元部から変形し、変形時に先端同士が互いに干渉する長さを有する櫛歯状の変形部と、変形部の根元部から熱膨張部材の外周側に折り返された基部とを備えることにより、シンプルな構造で、しかも熱膨張部材の膨張力により容易に変形してその端面を保持するので、加熱された熱膨張部材はガス圧を受けても管路に留まり、長時間に亘り管路をより確実に閉止することができる。 According to the pipe line blocking member of the present invention, the holding member is further inserted so as to come into contact with the inner peripheral surface of the thermal expansion member, and when the thermal expansion member expands, the holding member is deformed from the root portion in the direction of closing the pipe line. By providing a comb-like deformed portion having a length at which the tips interfere with each other at the time of deformation, and a base portion folded back from the base portion of the deformed portion to the outer peripheral side of the thermal expansion member, the structure is simple. Because it is easily deformed by the expansion force of the thermal expansion member and holds its end face, the heated thermal expansion member stays in the pipeline even when subjected to gas pressure, and more reliably closes the pipeline for a long time. Can do.

本発明の管路遮断部材によれば、保持部材を熱膨張部材の両端部（流体出口側および流体入口側の端部）に設けることにより、加熱された熱膨張部材は両端面から支持されるので、より密な状態となりさらに長時間に亘り管路を閉止する機能を維持することができる。 According to the conduit blocking member of the present invention, by Rukoto provided a holding member at both ends of the thermal expansion member (end portion of the fluid outlet side and a fluid inlet side), heated heat expansion member is supported from the both end faces As a result, a denser state can be maintained and the function of closing the pipeline for a longer time can be maintained.

本発明のガス配管用接続部材によれば、熱膨張部材が膨張したとき管路を塞ぐ方向にその根元部から変形し、変形時に先端同士が互いに干渉する長さを有する櫛歯状の変形部が形成された保持部材を備える管路遮断部材が継手本体に設けられるので、加熱された熱膨張部材の閉止機能を長期に亘って維持することが可能となり、火災時のガス漏れを防止することができる。 According to the connecting member for gas piping of the present invention, when the thermal expansion member expands, it deforms from its root portion in the direction of closing the pipeline, and the comb-shaped deformation portion has such a length that the tips interfere with each other at the time of deformation. Since the pipe shut-off member including the holding member formed with is provided in the joint body, the closed function of the heated thermal expansion member can be maintained for a long period of time, and gas leakage at the time of fire is prevented. Can do.

さらに、本発明のガス配管用接続部材によれば、管路遮断部材は、継手本体内周面に設けられた円周溝と熱膨張部材の外周面に設けられた突条部とが係合して継手本体の内周面に装填されるので、火災時のガス漏れをより確実に防止することができる。 Further, according to the gas pipe connecting member of the present invention, the pipe line blocking member is engaged with the circumferential groove provided on the inner peripheral surface of the joint body and the protrusion provided on the outer peripheral surface of the thermal expansion member. Then, since it is loaded on the inner peripheral surface of the joint body, it is possible to more reliably prevent gas leakage during a fire.

以下、本発明の詳細を添付図面に基づいて説明する。図１は本発明のガス遮断部材が使用されるガスメータ部の一例を示す正面図、図２（ａ）は本発明が適用されるガスメータ継手の一例を示す正面図、図２（ｂ）は同側面図、図３（ａ）は本発明が適用されるガスメータ継手の他の例を示す正面図、図３（ｂ）は同側面図、図４（ａ）は本発明の実施の形態に係わるガス配管用接続部材の断面図、図４（ｂ）は図４（ａ）のＡ−Ａ線矢視図、図５（ａ）は火災時のガス配管用接続部材の断面図、図５（ｂ）は図５（ａ）のＢ−Ｂ線矢視図、図６（ａ）は保持部材を展開した平面図、図６（ｂ）は同側面図である。   Hereinafter, the details of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view showing an example of a gas meter portion in which the gas blocking member of the present invention is used, FIG. 2 (a) is a front view showing an example of a gas meter joint to which the present invention is applied, and FIG. 3A is a front view showing another example of a gas meter joint to which the present invention is applied, FIG. 3B is a side view thereof, and FIG. 4A is related to an embodiment of the present invention. 4B is a cross-sectional view of the gas pipe connection member, FIG. 4B is a cross-sectional view taken along the line AA of FIG. 4A, FIG. FIG. 6B is a plan view in which the holding member is developed, and FIG. 6B is a side view thereof.

地中に埋設されたプラスチック管（例えばＰＥ管）に金属管（樹脂被覆鋼管）を接続し、この金属管を地上に立ち上げて地上のガスメータに配管接続する場合、例えば図１に示すように、ガスメータ１の入口側では、ガス本管に接続されるＰＥ管（いずれも不図示）の先端部に外面が樹脂で被覆された樹脂被覆鋼管２が接続されて地上に立ち上げられ、ガスメータ継手４によりガスメータ１の入口に接続される。一方ガスメータ１の出口側では、先端が建物内のヘッダーに接続されるフレキ管（いずれも不図示）を介して樹脂被覆鋼管３が接続されて地上に立ち上げられ、樹脂被覆鋼管３は、ガスメータ継手４によりガスメータ１の出口に接続される。５はガス栓、６は試験用チーである。ガスメータ継手４としては、例えば図２に示すショート型ガスメータ継手４ａあるいは図３に示すＳ字ネジ型ガスメータ継手４ｂが使用され、いずれも継手本体４１と締付ナット４２を有する。   When a metal pipe (resin-coated steel pipe) is connected to a plastic pipe (for example, PE pipe) buried in the ground and this metal pipe is set up on the ground and connected to a gas meter on the ground, for example, as shown in FIG. On the inlet side of the gas meter 1, a resin-coated steel pipe 2 whose outer surface is coated with a resin is connected to the tip of a PE pipe (both not shown) connected to the gas main pipe, and the gas meter joint is started up on the ground. 4 is connected to the inlet of the gas meter 1. On the other hand, on the outlet side of the gas meter 1, a resin-coated steel pipe 3 is connected to a gas meter via a flexible pipe (both not shown) connected to a header in the building, and the resin-coated steel pipe 3 is The joint 4 is connected to the outlet of the gas meter 1. 5 is a gas stopper, and 6 is a test Qi. As the gas meter joint 4, for example, a short-type gas meter joint 4 a shown in FIG. 2 or an S-shaped gas meter joint 4 b shown in FIG. 3 is used.

図４（ａ）に示すガス配管用接続部材は、矢印方向にガスが流動する継手本体４１のガス出口側に管路遮断部材７が設けられた構造を有する。管路遮断部材７は、図４（ｂ）に示すように耐熱性を有する金属材料（例えばＳＵＳ３０４等のオーステナイト系ステンレス鋼）からなる筒状の保持部材８と、そこに保持された耐火性を有する筒状の熱膨張パッキング９を有する。保持部材８は、図６（ａ）（ｂ）に示すように基部８ａとそれより長い櫛歯状の変形部８ｂからなる略コ字断面を有する部材であり、基部８ａと変形部８ｂとの間にシート状の熱膨張パッキング９（図６では省略）を差込み、これを丸めてから、図４に示すように継手本体４１に挿入することができる。また管路遮断部材７は、筒状に形成した保持部材８を金型内にセットしておき、その成形キャビティに原料を注入して熱膨張パッキング９を筒状に成形することにより作成してもよい。上記ガス配管用接続部材を加熱すると、図５に示す状態となる。すなわち熱膨張パッキング９が加熱されると、その体積が数倍乃至十倍程度に膨張するので、保持部材８は、櫛歯状の変形部８ｂが継手本体４１の内側に折り曲がる。従って、図５（ａ）に示すように矢印方向からガスが流入した場合でも、熱膨張パッキング９の崩壊は変形部８ｂで阻止されて膨らんだ状態を保ち、ガスの管路を閉止することができる。例えば図５（ａ）に示すガス遮断部材７をガス出口側に設けたショート型ガスメータ継手（図２参照）に、２．５ＫＰａの圧縮空気を７ｍ３／Ｈｒの流量で吹き込みながらＩＳＯ８３４に準じた加熱曲線になるように２ｈｒで１０４９℃まで加熱したところ、熱膨張パッキング９は膨らんだ状態を維持し、ガスの管路を閉止することが確認された。比較のために、熱膨張パッキング９のみをガス出口側に設けたショート型ガスメータ継手（図２参照）に、上記と同様の条件で圧縮空気を吹き込みながら加熱したところ、熱膨張パッキング９は管路から消失し、ガス出口側を貫通する空洞が形成されることが確認された。 The connection member for gas piping shown to Fig.4 (a) has the structure where the pipe | tube interruption | blocking member 7 was provided in the gas outlet side of the coupling main body 41 in which gas flows in the arrow direction. As shown in FIG. 4B, the pipe line blocking member 7 has a cylindrical holding member 8 made of a metal material having heat resistance (for example, austenitic stainless steel such as SUS304), and the fire resistance held therein. A cylindrical thermal expansion packing 9 is provided. As shown in FIGS. 6A and 6B, the holding member 8 is a member having a substantially U-shaped cross section including a base portion 8a and a comb-like deformed portion 8b longer than the base portion 8a. A sheet-like thermal expansion packing 9 (not shown in FIG. 6) is inserted in between and rolled up, and then inserted into the joint body 41 as shown in FIG. The pipe line blocking member 7 is prepared by setting a holding member 8 formed in a cylindrical shape in a mold, injecting a raw material into the molding cavity, and molding the thermal expansion packing 9 into a cylindrical shape. Also good. When the gas pipe connecting member is heated, the state shown in FIG. 5 is obtained. That is, when the thermal expansion packing 9 is heated, its volume expands to several times to ten times, so that the comb-shaped deformed portion 8 b of the holding member 8 is bent inside the joint body 41. Therefore, even when gas flows in from the direction of the arrow as shown in FIG. 5 (a), the collapse of the thermal expansion packing 9 is prevented by the deformable portion 8b and remains inflated, and the gas conduit is closed. it can. For example, conforming to ISO834 while blowing compressed air of 2.5 KPa at a flow rate of 7 m 3 / Hr into a short type gas meter joint (see FIG. 2) provided with the gas blocking member 7 shown in FIG. 5A on the gas outlet side. When heated to 1049 ° C. for 2 hours so as to form a heating curve, it was confirmed that the thermal expansion packing 9 maintained the expanded state and closed the gas conduit. For comparison, when the thermal expansion packing 9 was heated while blowing compressed air under the same conditions as above into a short type gas meter joint (see FIG. 2) in which only the thermal expansion packing 9 was provided on the gas outlet side, It was confirmed that a cavity penetrating the gas outlet side was formed.

上記の熱膨張パッキングは、１７０℃以上に加熱されると見掛けの体積が数十倍以上に増加するような材料で形成することが好ましい。この熱膨張パッキングは、例えば、原料ゴムと無発泡状態で熱膨張する黒鉛層間化合物と必要に応じ充填材、軟化材、加硫剤等を混練して得られたゴム配合物を、金型に充填して成形し、ついでプレス加硫することにより製造される。黒鉛層間化合物は、例えば黒鉛（六員環重合体層が層状に重なり合った炭素の六方晶系結晶体）に硫酸を反応させることにより得られる層間に硫酸根が結合した化合物であり、１７０℃以上に加熱されると無発泡状態で体積が数倍乃至数十倍にも増加し、８００℃〜１０００℃に加熱すると見掛けの体積は１００乃至２５０倍に増加する。原料ゴムとしては、天然ゴム（ＮＲ）、ニトリルブタジェンゴム（ＮＢＲ）、クロロプレンゴム（ＣＲ）、エチレン−プロピレンゴム（ＥＰＤＭ）、シリコーンゴム（Ｑ）等を用い得る。また熱膨張パッキングは、シール機能の点からショアーＡ硬度が５０〜８０度の範囲となるような組成、条件で製造することが望ましい。 The thermal expansion packing is preferably formed of a material whose apparent volume increases several tens of times or more when heated to 170 ° C. or higher. The thermal expansion packing, for example, graphite intercalation compounds and optionally filler to thermal expansion in the raw rubber and Muhatsu foam state, softener, the rubber compound obtained by kneading a vulcanizing agent or the like, the mold It is manufactured by filling and molding, followed by press vulcanization. The graphite intercalation compound is, for example, a compound in which sulfate radicals are bonded between layers obtained by reacting sulfuric acid with graphite (a hexagonal crystal of carbon in which six-membered ring polymer layers are layered), and is 170 ° C. or higher. When heated to be increased by several times to several tens times volume with no onset foam state, apparent volume when heated to 800 ° C. to 1000 ° C. is increased to 100 to 250 times. As the raw material rubber, natural rubber (NR), nitrile butadiene rubber (NBR), chloroprene rubber (CR), ethylene-propylene rubber (EPDM), silicone rubber (Q), or the like can be used. The thermal expansion packing is desirably manufactured with a composition and conditions such that the Shore A hardness is in the range of 50 to 80 degrees from the viewpoint of the sealing function.

本発明の管路遮断部材及びガス配管用接続部材は、上記の構造に限らず以下のような構造とすることもできる。図７〜図１０は本発明の他の実施の形態に係わるガス配管用接続部材の断面図であり、いずれも図４と同一機能部分は同一の参照符号で示す。   The pipe line blocking member and the gas pipe connecting member of the present invention are not limited to the above-described structure, and may have the following structure. 7 to 10 are cross-sectional views of a connecting member for gas piping according to another embodiment of the present invention, in which the same functional parts as those in FIG. 4 are denoted by the same reference numerals.

図７（ａ）に示すガス配管用接続部材において、管路遮断部材７は、継手本体４１の内部に筒状の熱膨張パッキング９を装填し、保持部材８の一端部８ｃを継手本体４１の内面に固着して継手本体４１との間に熱膨張パッキング９を封入し、次いで保持部材８の内部に、通気性が大でかつ変形可能な筒状のメッシュ部材１０を挿入することにより形成される。メッシュ部材１０は、例えばオーステナイト系ステンレス鋼製繊維あるいはガラス繊維からなる耐火性ネットを複数回巻回することにより作成される。この管路遮断部材７が加熱されると、図７（ｂ）に示すように熱膨張パッキング９が膨張してメッシュ部材１０が圧縮されるので、保持部材８が断面Ｔ字形に変形することにより、ガスの管路を閉止することができる。   In the gas pipe connecting member shown in FIG. 7A, the pipe line blocking member 7 is loaded with a cylindrical thermal expansion packing 9 inside the joint body 41, and one end portion 8 c of the holding member 8 is connected to the joint body 41. It is formed by sealing the thermal expansion packing 9 between the inner surface and the joint body 41 and then inserting a deformable cylindrical mesh member 10 having a large air permeability into the holding member 8. The The mesh member 10 is created by, for example, winding a fireproof net made of austenitic stainless steel fiber or glass fiber a plurality of times. When the pipe line blocking member 7 is heated, the thermal expansion packing 9 expands and the mesh member 10 is compressed as shown in FIG. 7B, so that the holding member 8 is deformed into a T-shaped cross section. The gas pipeline can be closed.

図８（ａ）に示すガス配管用接続部材において、ガスは矢印方向に流動し、管路遮断部材７は、一端部にプラグ１１がねじ込まれた継手本体４１の内部に栓状の熱膨張パッキング９が装填され、断面略Ｌ字形の閉止栓（保持部材）１２の一端部１２ａが継手本体４１の内面に固着されてプラグ１１との間に熱膨張パッキング９が封入されることにより形成される。管路遮断部材７が加熱されると、図８（ｂ）に示すように熱膨張パッキング９が膨張して閉止栓１２が途中で折れ曲って継手本体４１のガス出口を閉止することができる。   In the connecting member for gas piping shown in FIG. 8 (a), the gas flows in the direction of the arrow, and the pipe line blocking member 7 has a plug-like thermal expansion packing inside the joint body 41 in which the plug 11 is screwed into one end. 9, one end portion 12 a of a stopper plug (holding member) 12 having a substantially L-shaped cross section is fixed to the inner surface of the joint body 41, and the thermal expansion packing 9 is enclosed between the plug 11. . When the pipe line blocking member 7 is heated, the thermal expansion packing 9 expands as shown in FIG. 8B, and the closing plug 12 is bent in the middle to close the gas outlet of the joint body 41.

図９（ａ）に示すガス配管用接続部材において、ガスは矢印方向に流動し、管路遮断部材７は、継手本体４１の内部に装着され、筒状の熱膨張パッキング９の両端部に図６に示す保持部材８を差込むことにより形成される。管路遮断部材７が加熱されると、図９（ｂ）に示すように２つの保持部材８は、櫛歯状の変形部８ｂが管路の内側に折り曲がり開いた状態となる。従って、図９（ａ）の矢印方向からガスが流入した場合でも、熱膨張パッキング９はその両端面が拘束され、より密な状態になるため、膨らんだ状態を保ち、ガス出口をさらに確実に閉止することができる。   In the gas pipe connecting member shown in FIG. 9A, the gas flows in the direction of the arrow, and the pipe line blocking member 7 is mounted inside the joint body 41 and is attached to both ends of the cylindrical thermal expansion packing 9. It is formed by inserting the holding member 8 shown in FIG. When the pipe line blocking member 7 is heated, as shown in FIG. 9B, the two holding members 8 are in a state in which the comb-like deformed portion 8b is bent and opened inside the pipe line. Therefore, even when gas flows in from the direction of the arrow in FIG. 9A, both end surfaces of the thermal expansion packing 9 are constrained and become denser, so that the expanded state is maintained and the gas outlet is more reliably secured. Can be closed.

図１０（ａ）に示すガス配管用接続部材において、継手本体４１の出口側の内周面には、管軸方向に沿って複数の円周溝４４が形成されることにより、各円周溝４４の間に断面山形状の係合部４５が形成されている。また継手本体４１の内周面には、筒状の保持部材８（図６参照）に保持された耐火性を有する筒状の熱膨張パッキング９を有する管路遮断部材７が装填される。この熱膨張パッキング９の外周面は、継手本体４１の出口側の内周面と相互に補完しうる形状に形成されている。すなわち熱膨張パッキン９の外周面に、その軸方向に沿って複数の円周溝９１が形成されることにより、各円周溝９１の間に断面山形状の突条部９２が形成されている。上記管路遮断部材７が加熱されると、図１０（ｂ）に示すように熱膨張パッキング９が膨張して、その突条部９２が継手本体４１の円周溝４４を埋め尽くすことにより、熱膨張パッキン９は継手本体４１の係合部４５で保持され、継手本体４１に密着する。これにより、このガス配管用接続部材によれば、図４、図９に示されるガス配管用接続部材、すなわち継手本体４１に単条の円周溝が形成されたものよりも、継手本体４１の内周と熱膨張パッキング９とがより密着し、管路をより確実に閉止することができる。なお、図１０（ａ）に示す構造において、熱膨張パッキング９の両端部に保持部材８を装着してもよいことは言うまでもない。 In the connecting member for gas piping shown in FIG. 10 (a), a plurality of circumferential grooves 44 are formed along the tube axis direction on the inner peripheral surface on the outlet side of the joint body 41, whereby each circumferential groove is formed. An engagement portion 45 having a mountain-shaped cross section is formed between 44. Further, a pipe line blocking member 7 having a cylindrical thermal expansion packing 9 having fire resistance and held by a cylindrical holding member 8 (see FIG. 6) is loaded on the inner peripheral surface of the joint body 41. The outer peripheral surface of the thermal expansion packing 9 is formed in a shape that can complement each other with the inner peripheral surface on the outlet side of the joint body 41. That is, a plurality of circumferential grooves 91 are formed along the axial direction on the outer peripheral surface of the thermal expansion packing 9, so that a ridge 92 having a mountain-shaped cross section is formed between the circumferential grooves 91. . When the pipe line blocking member 7 is heated, the thermal expansion packing 9 expands as shown in FIG. 10 (b), and the protrusion 92 fills the circumferential groove 44 of the joint body 41. The thermal expansion packing 9 is held by the engaging portion 45 of the joint body 41 and is in close contact with the joint body 41. Thereby, according to this connecting member for gas piping, the connecting member for gas piping shown in FIG. 4 and FIG. The inner circumference and the thermal expansion packing 9 are more closely attached to each other, and the pipe line can be closed more reliably. Incidentally, FIG. 10 Oite the structure shown in (a), that the holding member 8 at both ends of the thermal expansion packing 9 may be mounted course.

上記の説明では、管路遮断部材をガスメータ継手に適用した例を記述したが、本発明の管路遮断部材は、ガス栓や試験用チーなどの他の接続部材に適用できることはもちろんである。   In the above description, an example in which the pipe line blocking member is applied to a gas meter joint has been described. However, the pipe line blocking member of the present invention can be applied to other connecting members such as a gas plug and a test chee.

本発明の管路遮断部材が使用されるガスメータ部の一例を示す正面図である。It is a front view which shows an example of the gas meter part in which the pipe line interruption member of the present invention is used. 本発明が適用されるガスメータ継手の一例を示す正面図（ａ）、同側面図（ｂ）である。It is the front view (a) and side view (b) which show an example of the gas meter coupling to which the present invention is applied. 本発明が適用されるガスメータ継手の他の例を示す正面図（ａ）、同側面図（ｂ）である。It is the front view (a) and the side view (b) which show the other example of the gas meter coupling to which this invention is applied. 本発明の実施の形態に係わるガス配管用接続部材の断面図｛（ａ）｝、図４（ａ）のＡ−Ａ線矢視図｛（ｂ）｝である。It is sectional drawing {(a)} of the connection member for gas piping concerning embodiment of this invention, and the AA arrow directional view {(b)} of Fig.4 (a). 火災時の図４のガス配管用接続部材の断面図｛（ａ）｝、図５（ａ）のＢ−Ｂ線矢視図｛（ｂ）｝である。It is sectional drawing {(a)} of the connection member for gas piping of FIG. 4 at the time of a fire, and the BB arrow line view {(b)} of FIG. 5 (a). 保持部材を展開した平面図｛（ａ）｝、同側面図｛（ｂ）｝である。It is the top view {(a)} which developed the holding member, and the same side view {(b)}. 本発明の他の実施の形態に係わるガス配管用接続部材の断面図｛（ａ）｝、火災時の同接続部材の断面図｛（ｂ）｝である。It is sectional drawing {(a)} of the connection member for gas piping concerning other embodiment of this invention, and sectional drawing {(b)} of the connection member at the time of a fire. 本発明の他の実施の形態に係わるガス配管用接続部材の断面図｛（ａ）｝、火災時の同接続部材の断面図｛（ｂ）｝である。It is sectional drawing {(a)} of the connection member for gas piping concerning other embodiment of this invention, and sectional drawing {(b)} of the connection member at the time of a fire. 本発明の他の実施の形態に係わるガス配管用接続部材の断面図｛（ａ）｝、火災時の同接続部材の断面図｛（ｂ）｝である。It is sectional drawing {(a)} of the connection member for gas piping concerning other embodiment of this invention, and sectional drawing {(b)} of the connection member at the time of a fire. 本発明の他の実施の形態に係わるガス配管用接続部材の断面図｛（ａ）｝、火災時の同接続部材の断面図｛（ｂ）｝である。It is sectional drawing {(a)} of the connection member for gas piping concerning other embodiment of this invention, and sectional drawing {(b)} of the connection member at the time of a fire.

符号の説明Explanation of symbols

１：ガスメータ、２：樹脂被覆鋼管、３：フレキ管、４、４ａ、４ｂ：ガスメータ継手、４１：継手本体、４２：締付ナット、４３：係止部、４４：円周溝、４５：係合部、５：メータガス栓、６：試験チー、７：管路遮断部材、８：保持部材、８ａ：基部、８ｂ：変形部、９：熱膨張パッキング、９１：円周溝、９２：突条部、１０：メッシュ部材、１１：プラグ、１２：閉止栓 1: gas meter, 2: resin-coated steel pipe, 3: flexible pipe, 4, 4a, 4b: gas meter joint, 41: joint body, 42: clamping nut, 43: locking portion, 44: circumferential groove, 45: engagement Joint part, 5: Meter gas stopper, 6: Test chee, 7: Pipe line blocking member, 8: Holding member, 8a: Base part, 8b: Deformed part, 9: Thermal expansion packing, 91: Circumferential groove, 92: Projection 10: Mesh member, 11: Plug, 12: Closure plug

Claims (4)

耐火性を有する筒状の熱膨張部材と、前記熱膨張部材の流体出口側の端部に設けられ前記熱膨張部材を保持する保持部材とを備え、ガスの管路内に装着される管路遮断部材であって、
前記保持部材は、
前記熱膨張部材の端部から前記熱膨張部材の内周面と接触するように挿入され、前記熱膨張部材が膨張したとき前記管路を塞ぐ方向にその根元部から変形し、変形時に先端同士が互いに干渉する長さを有する櫛歯状の変形部と、
前記変形部の根元部から前記熱膨張部材の外周側に折り返された基部と、
を備えることを特徴とする管路遮断部材。 A pipe line that is provided in a gas pipe line, and includes a cylindrical heat expansion member having fire resistance, and a holding member that is provided at an end portion on the fluid outlet side of the heat expansion member and holds the heat expansion member A blocking member,
The holding member is
Inserted from the end of the thermal expansion member so as to be in contact with the inner peripheral surface of the thermal expansion member, and when the thermal expansion member expands, it deforms from its root portion in a direction to close the conduit, Comb-shaped deformed portions having lengths that interfere with each other;
A base portion folded from the root portion of the deformable portion to the outer peripheral side of the thermal expansion member;
Conduit blocking member, characterized in that it comprises a. 耐火性を有する筒状の熱膨張部材と、前記熱膨張部材の両端部（流体出口側および流体入口側の端部）に設けられ前記熱膨張部材を保持する保持部材とを備え、ガスの管路内に装着される管路遮断部材であって、
前記保持部材は、
前記熱膨張部材の端部から前記熱膨張部材の内周面と接触するように挿入され、前記熱膨張部材が膨張したとき前記管路を塞ぐ方向にその根元部から変形し、変形時に先端同士が互いに干渉する長さを有する櫛歯状の変形部と、
前記変形部の根元部から前記熱膨張部材の外周側に折り返された基部と、
を備えることを特徴とする管路遮断部材。 A gas pipe having a fire-resistant cylindrical thermal expansion member and holding members that are provided at both ends of the thermal expansion member (ends on the fluid outlet side and the fluid inlet side) and hold the thermal expansion member A pipe blocking member mounted in the road,
The holding member is
Inserted from the end of the thermal expansion member so as to be in contact with the inner peripheral surface of the thermal expansion member, and when the thermal expansion member expands, it deforms from its root portion in a direction to close the conduit, Comb-shaped deformed portions having lengths that interfere with each other;
A base portion folded from the root portion of the deformable portion to the outer peripheral side of the thermal expansion member;
Conduit blocking member, characterized in that it comprises a. ガスを流動させるガスの管路に設けられ、前記管路を構成する継手本体と、A joint body which is provided in a gas pipeline for flowing gas, and which constitutes the pipeline;
前記継手本体の内部に設けられ、前記管路が加熱された時に前記管路を閉止する管路遮断部材と、を備えるガス配管用接続部材であって、A gas pipe connecting member provided inside the joint body, the pipe line blocking member closing the pipe line when the pipe line is heated,
前記管路遮断部材は、請求項１または請求項２に記載の管路遮断部材であることを特徴とするガス配管用接続部材。The pipe line blocking member is the pipe line blocking member according to claim 1 or 2, wherein the gas pipe connecting member is provided. 前記継手本体の内周面には、管軸方向に沿って複数の円周溝と、前記各円周溝の間に断面山形状の係合部とが形成され、On the inner peripheral surface of the joint body, a plurality of circumferential grooves are formed along the tube axis direction, and an engaging portion having a cross-sectional mountain shape is formed between the circumferential grooves.
前記熱膨張部材の外周面には、管軸方向に沿って前記円周溝に対応する複数の突条部が形成され、On the outer peripheral surface of the thermal expansion member, a plurality of protrusions corresponding to the circumferential groove is formed along the tube axis direction,
前記管路遮断部材は、前記円周溝と前記突条部とが係合して継手本体の内周面に装填されていることを特徴とする請求項３に記載のガス配管用接続部材。The connecting member for a gas pipe according to claim 3, wherein the pipe line blocking member is mounted on an inner peripheral surface of a joint body with the circumferential groove and the protruding portion engaging with each other.
JP2003377154A 2002-11-08 2003-11-06 Pipe line blocking member and connecting member for gas piping Expired - Lifetime JP4415307B2 (en)

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JP2002325545 2002-11-08
JP2003377154A JP4415307B2 (en) 2002-11-08 2003-11-06 Pipe line blocking member and connecting member for gas piping

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KR101930909B1 (en) * 2016-08-26 2018-12-21 인천대학교 산학협력단 The damper with a foamable noncombustible material

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