JPH11346416A - Disaster preventive sheet for cable and disaster prevention engineering method using the same - Google Patents
Disaster preventive sheet for cable and disaster prevention engineering method using the sameInfo
- Publication number
- JPH11346416A JPH11346416A JP10237818A JP23781898A JPH11346416A JP H11346416 A JPH11346416 A JP H11346416A JP 10237818 A JP10237818 A JP 10237818A JP 23781898 A JP23781898 A JP 23781898A JP H11346416 A JPH11346416 A JP H11346416A
- Authority
- JP
- Japan
- Prior art keywords
- cable
- disaster prevention
- sheet
- heat
- adhesive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002265 prevention Effects 0.000 title claims description 59
- 230000003449 preventive effect Effects 0.000 title abstract 3
- 238000012407 engineering method Methods 0.000 title 1
- 239000010410 layer Substances 0.000 claims abstract description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000853 adhesive Substances 0.000 claims abstract description 16
- 230000001070 adhesive effect Effects 0.000 claims abstract description 16
- 239000012790 adhesive layer Substances 0.000 claims abstract description 11
- 229920001084 poly(chloroprene) Polymers 0.000 claims abstract description 10
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 9
- 239000004917 carbon fiber Substances 0.000 claims abstract description 9
- 230000009970 fire resistant effect Effects 0.000 claims abstract description 9
- 229910052742 iron Inorganic materials 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 229910001220 stainless steel Inorganic materials 0.000 claims description 10
- 239000010935 stainless steel Substances 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 4
- 239000012210 heat-resistant fiber Substances 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 13
- 238000010438 heat treatment Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 7
- 230000005855 radiation Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 229920002972 Acrylic fiber Polymers 0.000 abstract description 3
- 150000001336 alkenes Chemical class 0.000 abstract description 3
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 abstract description 3
- 229920000297 Rayon Polymers 0.000 abstract description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000003522 acrylic cement Substances 0.000 abstract description 2
- 229920006231 aramid fiber Polymers 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 2
- 239000002964 rayon Substances 0.000 abstract description 2
- 229910052725 zinc Inorganic materials 0.000 abstract description 2
- 239000011701 zinc Substances 0.000 abstract description 2
- 238000012937 correction Methods 0.000 description 9
- 239000002390 adhesive tape Substances 0.000 description 7
- 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 description 6
- 238000010276 construction Methods 0.000 description 6
- 239000003063 flame retardant Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 4
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000011151 fibre-reinforced plastic Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 description 3
- 239000011490 mineral wool Substances 0.000 description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 210000002268 wool Anatomy 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000004709 Chlorinated polyethylene Substances 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 229920003071 Polyclar® Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Landscapes
- Details Of Indoor Wiring (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ケーブルやケーブ
ル管路等を火災等から保護するために使用される防災シ
ートおよびこれを用いた防災工法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disaster prevention sheet used to protect cables and cable conduits from fire and the like, and a disaster prevention method using the same.
【０００２】[0002]
【従来の技術】一般に、橋梁に沿ってケーブルを布設す
る場合、橋梁の下側に、鋼、ＦＲＰ（繊維強化プラスチ
ック）、ポリ塩化ビニル樹脂等からなるケーブル管を添
架し、その中にケーブルを引き込むとともに、橋梁下で
焚き火などが行われても、その火炎にケーブル管が直接
さらされることのないよう、ケーブル管外周にロックウ
ールやセラミックウール等の耐火断熱材を例えば厚さ25
mm程度に巻き付け、さらにその外周を鉄板で覆う方法が
採られている。ケーブル管が直接火炎にさらされると、
ケーブル管自体が損傷したり、あるいはケーブル管は損
傷しなくとも内部の温度が上昇して、収納したケーブル
を損傷させたりあるいは機能を損失させたりするおそれ
があるからである。2. Description of the Related Art Generally, when laying a cable along a bridge, a cable pipe made of steel, FRP (fiber reinforced plastic), polyvinyl chloride resin, or the like is attached to the lower side of the bridge, and the cable is laid therein. At the same time, fireproof insulation such as rock wool or ceramic wool, for example, with a thickness of 25 mm, is applied around the cable pipe so that the cable pipe is not directly exposed to the flames even if a bonfire is performed under the bridge.
A method is adopted in which the wire is wound to about mm and the outer periphery is further covered with an iron plate. If the cable tube is directly exposed to the flame,
This is because the cable tube itself may be damaged, or even if the cable tube is not damaged, the internal temperature may increase, and the stored cable may be damaged or its function may be lost.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、このよ
うな防火対策では、橋梁に添架されたケーブル管の外側
にロックウール等を巻き付ける作業が容易でないうえ、
このような困難な巻き付け作業の後、さらに鉄板で覆う
作業が必要であるため、施工に多大な時間と労力を要す
るという問題があった。However, with such fire prevention measures, it is not easy to wind rock wool or the like around the outside of a cable pipe attached to a bridge.
After such a difficult winding operation, an operation of further covering with an iron plate is required, so that there is a problem that a great deal of time and labor is required for the construction.
【０００４】また、熱抵抗の高い材料を使用しているた
め、ケーブル通電時の放熱性に乏しく、ケーブルの許容
電流を低下させるという問題があった。Further, since a material having a high thermal resistance is used, there is a problem in that heat dissipation during energization of the cable is poor and the allowable current of the cable is reduced.
【０００５】そこで、橋梁に添架されたケーブル管外周
へも容易に施工することができ、また、ケーブルの許容
電流への影響が少なく、しかも、ケーブルやケーブル管
を火炎から保護するに十分な耐火断熱性を備えた防災シ
ートおよびこれを用いた防災工法の開発が強く要望され
ている。[0005] Therefore, the cable can be easily installed on the outer periphery of the cable pipe attached to the bridge, and the influence on the allowable current of the cable is small, and the fireproof enough to protect the cable and the cable pipe from the flame is provided. There is a strong demand for the development of a disaster prevention sheet having heat insulation properties and a disaster prevention method using the same.
【０００６】なお、防災シートを用いてケーブルやケー
ブル管を火災等から保護する方法は既に知られている。
しかしながら、従来の防災シートは、金属板上に難燃性
ゴム（例えば、難燃性クロロプレンゴム、難燃性塩素化
ポリエチレン、難燃性エチレンプロピレンゴム、難燃性
シリコーンゴム等）を貼合せたもので、ケーブルの延焼
防止効果に優れるものの、ゴムの熱伝導率が比較的大き
いため、熱によりケーブル、特にケーブル絶縁体が劣化
しやすいという難点があった。[0006] A method of protecting a cable or a cable tube from a fire or the like using a disaster prevention sheet is already known.
However, the conventional disaster prevention sheet has a flame retardant rubber (for example, flame retardant chloroprene rubber, flame retardant chlorinated polyethylene, flame retardant ethylene propylene rubber, flame retardant silicone rubber, etc.) bonded on a metal plate. Although it is excellent in the effect of preventing the spread of fire of the cable, the heat conductivity of the cable, particularly the cable insulator, tends to deteriorate due to the relatively large thermal conductivity of rubber.
【０００７】また、ケーブル管路の外側に熱で発泡する
延焼防止塗料を数mm以上の厚さに塗布することにより、
延焼防止と断熱を同時に行わせる方法も知られている
が、この種の塗料は、水性エマルジョンベースのため硬
化に時間がかかり液ダレしやすいという難点があった。
このため、橋梁下に設ける場合には、支持板を設けるな
どして液ダレを防止する必要があり、前述した方法同
様、施工は容易ではなかった。Further, by applying a fire spread coating which foams by heat to a thickness of several mm or more on the outside of the cable conduit,
Although a method of simultaneously preventing fire spread and heat insulation is also known, this type of paint has a drawback in that it takes a long time to cure because of an aqueous emulsion base, and it is easy to drip.
For this reason, when installing under a bridge, it is necessary to prevent liquid dripping by providing a support plate or the like, and as in the above-described method, construction was not easy.
【０００８】本発明はこのような点に対処してなされた
もので、施工が容易なうえ、ケーブルの加熱を防止し許
容電流への影響が少なく、しかも、ケーブルやケーブル
管を火炎から十分に保護することができる防災シートお
よびこれを用いた防災工法を提供することを目的とす
る。[0008] The present invention has been made in view of such a point, the construction is easy, the heating of the cable is prevented, the influence on the allowable current is small, and the cable and the cable tube are sufficiently protected from the flame. An object is to provide a disaster prevention sheet that can be protected and a disaster prevention method using the same.
【０００９】[0009]
【課題を解決するための手段】本発明の防災シートは、
金属基材上に、接着剤層を介して、固有熱抵抗が 500〜
2500℃・cm/Wの耐火断熱層を具備してなることを特徴と
している。The disaster prevention sheet of the present invention comprises:
On a metal substrate, an intrinsic heat resistance of 500 ~
It is characterized by having a fireproof heat insulation layer of 2500 ° C./cm/W.
【００１０】また、本発明の防災工法は、前記防災シー
トで、ケーブルもしくはケーブルを収納したケーブル管
路を包覆する工程を含むことを特徴としている。The disaster prevention method according to the present invention is characterized in that the disaster prevention sheet includes a step of covering the cable or a cable conduit containing the cable with the disaster prevention sheet.
【００１１】本発明の防災シートにおいては、後述する
ように、ケーブルやケーブル管、あるいはケーブルを収
容したケーブルラックやケーブルダクト等の外周に巻い
て粘着テープや締付けバンド等で適宜固定すればよいの
で、橋梁下や洞道内等の、限られたスペースでしかも足
場の悪い状態での作業が余儀なくされる場所であって
も、容易かつ短時間に施工することができる。In the disaster prevention sheet of the present invention, as described later, it is sufficient that the sheet is wound around the outer periphery of a cable, a cable tube, a cable rack or a cable duct containing the cable, and is appropriately fixed with an adhesive tape, a tightening band, or the like. Even in a limited space, such as under a bridge or in a cave, and in a place where work must be performed in a state of poor scaffolding, construction can be performed easily and in a short time.
【００１２】そのうえ、固有熱抵抗が 500〜2500℃・cm
/Wの耐火断熱層を具備しているので、通常時にはケーブ
ルからの放熱が大きく妨げられることはなく、一方、火
災等が発生した時には、十分に熱を遮断してケーブルを
保護することができる。In addition, the specific heat resistance is 500 to 2500 ° C. · cm
/ W has a fire-resistant heat-insulating layer, so the heat radiation from the cable is not greatly hindered during normal operation, while in the event of a fire, etc., the heat can be sufficiently shut off to protect the cable. .
【００１３】また、本発明の防災工法によれば、上記の
ような優れた特性を有する防災シートで、ケーブルもし
くはケーブルを収納したケーブル管路を包覆するため、
ケーブルやケーブル管路を火災等による熱から十分かつ
容易に保護することができるとともに、通常時にはケー
ブルの放熱を大きく妨げるようなこともなく、ケーブル
の許容電流への影響が抑制される。Further, according to the disaster prevention method of the present invention, since the cable or the cable conduit containing the cable is covered with the disaster prevention sheet having the above excellent characteristics,
The cable and the cable conduit can be sufficiently and easily protected from heat caused by a fire or the like, and the influence on the allowable current of the cable can be suppressed without significantly hindering the heat radiation of the cable in a normal state.
【００１４】[0014]
【発明の実施の形態】以下、本発明の実施の形態を図面
を用いて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１５】図１は本発明の防災シートの一例を示す断
面図である。FIG. 1 is a sectional view showing an example of the disaster prevention sheet of the present invention.
【００１６】図１において、１は金属基材を示し、この
金属基材１上には、接着剤層２を介して、固有熱抵抗が
500〜2500℃・cm/Wの耐火断熱層３が設けられている。
なお、耐火断熱層３は、必ずしも金属基材１の全面に設
ける必要はなく、金属基材１の幅方向の一端部または両
端部を露出させて設けるようにしてもよい。In FIG. 1, reference numeral 1 denotes a metal substrate, on which a specific thermal resistance is provided via an adhesive layer 2.
A fire-resistant heat-insulating layer 3 of 500 to 2500 ° C. · cm / W is provided.
Note that the refractory heat insulating layer 3 does not necessarily need to be provided on the entire surface of the metal base 1, and may be provided with one end or both ends in the width direction of the metal base 1 exposed.
【００１７】金属基材１には、ケーブル等に対する保護
効果と施工のし易さから、機械的強度が高く、かつ、可
とう性に優れ、さらに、ケーブルによる電磁誘導の発熱
しにくい非磁性体材料の使用が好ましく、例えば、ステ
ンレスシートや、表面に亜鉛等のメッキを施した鉄板等
が使用される。特に、ステンレスシートは、耐食性に優
れ、また、電力ケーブルに使用した場合の電磁誘導によ
る発熱も鉄に比べ小さいことから、好ましく使用され
る。なお、これらのステンレスシートやメッキを施した
鉄板は、厚さが0.05〜0.2 mm程度のものが望ましく、0.
05mm未満では機械的強度が小さく、ケーブル等に対する
保護効果が不十分となり、また、0.2 mmを越えると、可
とう性が低下し、巻き付けが困難になる。The metal substrate 1 is made of a non-magnetic material having high mechanical strength, excellent flexibility, and hardly generating heat due to electromagnetic induction due to the cable because of its effect of protecting cables and the like and ease of construction. It is preferable to use a material, for example, a stainless steel sheet or an iron plate having a surface plated with zinc or the like. In particular, stainless steel sheets are preferably used because they have excellent corrosion resistance and generate less heat by electromagnetic induction when used for power cables than iron. The stainless steel sheet or the plated iron plate preferably has a thickness of about 0.05 to 0.2 mm.
If the thickness is less than 05 mm, the mechanical strength is low, and the effect of protecting the cable or the like becomes insufficient. If the thickness exceeds 0.2 mm, the flexibility decreases and winding becomes difficult.
【００１８】接着剤層２は、上記金属基材１と上層に設
ける耐火断熱層３とを接着させるためのもので、クロロ
プレンゴム系接着剤、オレフィン系接着剤、アクリル系
接着剤等が使用されるが、本発明においては、特に、接
着性能の温度依存性が小さく、かつ、耐熱性、耐水性、
耐湿性等に優れるクロロプレンゴム系接着剤の使用が望
ましい。ここで、クロロプレンゴム（ＣＲ）系接着剤と
代表的なオレフィン系接着剤の 1種であるエチレン−酢
酸ビニル共重合体（ＥＶＡ）系接着剤の接着性能を評価
するため行った各種試験の結果を表１に示す。なお、被
着体にはステンレス（SUS 304 ）板を使用した。The adhesive layer 2 is for adhering the metal substrate 1 and the refractory heat-insulating layer 3 provided thereon, and is made of a chloroprene rubber-based adhesive, an olefin-based adhesive, an acrylic adhesive, or the like. However, in the present invention, in particular, the temperature dependence of the adhesion performance is small, and heat resistance, water resistance,
It is desirable to use a chloroprene rubber-based adhesive having excellent moisture resistance and the like. Here, results of various tests performed to evaluate the adhesive performance of a chloroprene rubber (CR) adhesive and an ethylene-vinyl acetate copolymer (EVA) adhesive, which is one of typical olefin adhesives Are shown in Table 1. Note that a stainless steel (SUS 304) plate was used for the adherend.
【００１９】[0019]
【表１】 表１からも明らかなように、クロロプレンゴム（ＣＲ）
系接着剤は各試験ですべて良好な結果が得られ、本発明
に用いる接着剤として好適であることがわかる。[Table 1] As is clear from Table 1, chloroprene rubber (CR)
Good results were obtained in all of the tests for the system adhesives, and it is understood that the system adhesives are suitable as the adhesive used in the present invention.
【００２０】次に、固有熱抵抗が 500〜2500℃・cm/Wの
耐火断熱層３には、例えば炭素繊維をニードリングした
ものが使用される。炭素繊維は、ＬＩＯ（限界酸素指
数）が35以上のものを使用することが望ましく、ＬＩＯ
が50以上であるとさらに望ましい。ＬＩＯが35未満のも
のでは、火災時等に燃焼して断熱性が失われるおそれが
ある。固有熱抵抗が 500〜2500℃・cm/Wを満足する限
り、アラミド繊維、難燃レーヨン、耐熱アクリル繊維、
ポリクラール、ガラス繊維、アスベスト繊維、ロックウ
ール、セラミックウール等の耐熱繊維の使用も可能であ
るが、これらの単独使用では前記固有熱抵抗を得ること
は困難で、したがって、これらは炭素繊維との併用で使
用される。但し、この場合も、耐火断熱層３として上記
の酸素指数の条件を満たしていることが望ましい。な
お、例えば炭素繊維を耐熱アクリル繊維とともにニード
リングして形成した耐火断熱層３は、炭素繊維単独で形
成されたものより、機械的強度が向上する利点を有す
る。Next, as the refractory heat-insulating layer 3 having a specific thermal resistance of 500 to 2500 ° C. · cm / W, for example, a material obtained by needling carbon fibers is used. It is preferable to use carbon fibers having an LIO (Limited Oxygen Index) of 35 or more.
Is more preferably 50 or more. If the LIO is less than 35, it may be burned at the time of fire or the like, and the heat insulation may be lost. Aramid fiber, flame retardant rayon, heat resistant acrylic fiber,
It is possible to use heat-resistant fibers such as polyclar, glass fiber, asbestos fiber, rock wool, and ceramic wool, but it is difficult to obtain the specific heat resistance by using these alone, and therefore, these are used in combination with carbon fibers. Used in. However, also in this case, it is desirable that the refractory heat-insulating layer 3 satisfies the above-mentioned oxygen index condition. Note that, for example, the fire-resistant and heat-insulating layer 3 formed by needling carbon fibers together with heat-resistant acrylic fibers has an advantage that the mechanical strength is improved as compared with the case where carbon fibers are formed alone.
【００２１】この耐火断熱層３の厚さは、 5〜12.5mm程
度が適当で、 5mmより薄いと断熱性が不十分となり、逆
に12.5mmより厚いと、ケーブルからの放熱が困難になっ
て、ケーブルの許容電流を低下させるおそれがある。よ
り好ましい厚さは、 7.5〜12.5mmの範囲である。The thickness of the refractory heat-insulating layer 3 is suitably about 5 to 12.5 mm. When the thickness is less than 5 mm, the heat insulating property becomes insufficient. When the thickness is more than 12.5 mm, heat radiation from the cable becomes difficult. Therefore, the allowable current of the cable may be reduced. A more preferred thickness is in the range of 7.5 to 12.5 mm.
【００２２】本発明においては、このような固有熱抵抗
が 500〜2500℃・cm/Wの耐火断熱層３を設けることによ
り、通常時にはケーブルからの放熱を妨げることがな
く、一方、火災等が発生した時には十分な断熱効果を発
揮し、ケーブルを熱から保護することができる。すなわ
ち、固有熱抵抗が 500℃・cm/W未満では断熱性が不十分
となって防火性能が低下し、逆に、固有熱抵抗が2500℃
・cm/Wを越えると、通常時のケーブルからの放熱が困難
になって、ケーブルの許容電流を低下させるおそれがあ
る。In the present invention, by providing such a fire-resistant and heat-insulating layer 3 having a specific thermal resistance of 500 to 2500 ° C. · cm / W, the heat radiation from the cable is not normally hindered. When it occurs, it exerts a sufficient heat insulating effect and can protect the cable from heat. In other words, if the specific thermal resistance is less than 500 ° C./cm/W, the heat insulation becomes insufficient and the fire prevention performance decreases, and conversely, the specific thermal resistance becomes 2500 ° C.
-If it exceeds cm / W, it becomes difficult to radiate heat from the cable during normal operation, and the allowable current of the cable may be reduced.
【００２３】このような防災シートを取り付けるにあた
っては、例えば図２（ａ）に示すように、防災シート４
をケーブルもしくはケーブルを収納したケーブル管５の
外周に、耐火断熱層３側を内側に向けて巻き付け、その
一端側を外側に折り返し、その上に他端側を重ね、この
重ね部を粘着テープ６で挟み込むように固定した後、こ
れらを長さ方向に適当な間隔をおいて締付けバンド（図
示を省略）で締付け固定するか、あるいは、図２（ｂ）
に示すように、防災シート４をケーブルもしくはケーブ
ル管５の外周に、耐火断熱層３側を内側に向けて巻き付
け、防災シート４の一端縁をケーブルもしくはケーブル
管５の長さ方向に粘着テープ６で固定し、他端縁もその
上から重ねて粘着テープ６で固定した後、これらを長さ
方向に適当な間隔をおいて締付けバンド（図示を省略）
で固定する。When attaching such a disaster prevention sheet, for example, as shown in FIG.
Is wound around the outer periphery of the cable or the cable tube 5 containing the cable, with the refractory and heat-insulating layer 3 side facing inward, one end of which is folded outward, the other end is overlaid, and this overlapped portion is adhered to an adhesive tape 6. After being fixed so as to be sandwiched between them, they are tightened and fixed with a tightening band (not shown) at an appropriate interval in the length direction, or FIG.
As shown in the figure, the fire prevention sheet 4 is wound around the outer periphery of the cable or the cable tube 5 with the refractory heat insulating layer 3 side inward, and one end of the fire prevention sheet 4 is adhered to the adhesive tape 6 in the length direction of the cable or the cable tube 5. After fixing the other end edge from above on it and fixing it with the adhesive tape 6, they are tightened at appropriate intervals in the length direction (not shown).
Fix with.
【００２４】なお、防災シート４を巻き付ける際に、例
えば図３に示すように、予めケーブルもしくはケーブル
管５の外周を金属線や高抗張力繊維からなる紐等の線状
体７を巻き付けてその外形を整えておくと、防災シート
４の巻き付けの作業性が向上するだけでなく、ゆがみや
凹凸等のない良好な外観に仕上げることができ、より有
利である。特に、ケーブルやケーブル管複数本の外周に
防災シート４を一括して巻き付ける場合、このような予
備作業を行うことが望ましい。When the disaster prevention sheet 4 is wound, for example, as shown in FIG. 3, the outer periphery of the cable or the cable tube 5 is previously wound with a wire 7 such as a metal wire or a string made of high tensile strength fiber. If not, not only the workability of winding the disaster prevention sheet 4 is improved, but also it is possible to finish the appearance without distortion or unevenness, which is more advantageous. In particular, when the disaster prevention sheet 4 is collectively wound around the outer periphery of a plurality of cables and cable tubes, it is desirable to perform such preliminary work.
【００２５】そして、このようにして、ケーブルもしく
はケーブル管５の長さ方向に複数枚の防災シート６を端
面を突き合わせつつ固定していき、それらの突き合わせ
部を、シーリング材でシールし、その上に粘着テープを
巻付けることにより施工が完了する。Then, in this way, a plurality of disaster prevention sheets 6 are fixed in the length direction of the cable or the cable tube 5 with their end faces abutting each other, and the abutting portions are sealed with a sealing material. The construction is completed by wrapping the adhesive tape around.
【００２６】防災シートを固定する粘着テープ６には、
例えば片面にそれぞれ粘着層を設けたステンレステープ
やアルミ・ガラスクロス複合テープ等が好ましく使用さ
れ、また、締付けバンドには、電力工事用止め具として
市販されている自動ロック式のステンレスバンド等が好
ましく使用される。The adhesive tape 6 for fixing the disaster prevention sheet includes
For example, a stainless tape or an aluminum-glass cloth composite tape provided with an adhesive layer on one side is preferably used, and a self-locking stainless steel band or the like, which is commercially available as a power work stopper, is preferably used as a fastening band. used.
【００２７】特に、粘着テープ６には、粘着層が、熱老
化特性、耐水性、耐候性等に優れるアクリル系もしくは
ブチル系粘着剤からなるものの使用が好ましい。ここ
で、粘着層がアクリル系粘着剤からなるステンレス（SU
S 304 ）テープと、エチレン−酢酸ビニル共重合体（Ｅ
ＶＡ）系粘着剤からなるステンレス（SUS 304 ）テープ
について行った粘着試験の結果を表２に示す。In particular, it is preferable that the pressure-sensitive adhesive tape 6 be made of an acrylic or butyl pressure-sensitive adhesive having an excellent heat aging property, water resistance, weather resistance and the like. Here, the adhesive layer is made of stainless steel (SU
S 304) tape and ethylene-vinyl acetate copolymer (E
Table 2 shows the results of an adhesion test performed on a stainless steel (SUS 304) tape made of a VA) -based adhesive.
【００２８】[0028]
【表２】 表２からも明らかなように、アクリル系粘着剤は各試験
ですべて良好な結果が得られ、本発明に用いる粘着とし
て好適であることがわかる。[Table 2] As is evident from Table 2, all the acrylic pressure-sensitive adhesives obtained good results in each test, indicating that they are suitable as the pressure-sensitive adhesive used in the present invention.
【００２９】このように本発明の防災シートは、ケーブ
ルあるいはケーブル管等の外周に簡単に取り付けること
ができ、橋梁下や洞道内といったスペースの限られた場
所でも、また、足場の悪い場所でも容易にかつ短時間に
施工することができる。そして、施工後は、ケーブルや
ケーブル管を火災や機械的外力等から保護するととも
に、通常時のケーブルからの放熱を大きく妨げることも
ない。As described above, the disaster prevention sheet of the present invention can be easily attached to the outer periphery of a cable or a cable pipe, and can be easily used even in a place where space is limited, such as under a bridge or in a cave, or where a scaffold is poor. It can be constructed quickly and in a short time. After the installation, the cable and the cable pipe are protected from fire, mechanical external force, and the like, and the heat radiation from the cable during normal operation is not largely hindered.
【００３０】したがって、電力ケーブルをはじめ電気通
信ケーブルや光通信ケーブル等の各種ケーブルに適用す
る防災シートとして有用で、また、その他、水道やガス
などの配管を火災や外力から保護する防災シートとして
も使用することができる。Therefore, it is useful as a disaster prevention sheet applied to various cables such as power cables, telecommunication cables and optical communication cables, and also as a fire prevention sheet for protecting pipes of water and gas from fire and external force. Can be used.
【００３１】[0031]
【実施例】次に、本発明の実施例を記載する。Next, examples of the present invention will be described.
【００３２】実施例 厚さ0.15mm、長さ 30m、幅 1m のステンレス（SUS 304)
板の片面に、クロロプレンゴム系接着剤を塗布し、その
上に、限界酸素指数50の炭素繊維を積層し、常温にて接
着して、厚さ7.5mm 、固有熱抵抗2000℃・cm/Wの耐火断
熱層を有する防災シートを得た。Example: Stainless steel (SUS 304) having a thickness of 0.15 mm, a length of 30 m and a width of 1 m
A chloroprene rubber-based adhesive is applied to one side of the board, and carbon fibers with a limiting oxygen index of 50 are laminated on it and bonded at room temperature to a thickness of 7.5 mm and a specific thermal resistance of 2000 ° C / cm / W. A fire prevention sheet having a fire-resistant and heat-insulating layer was obtained.
【００３３】比較例 炭素繊維に代えてセラミックウールを用い、厚さ12.5m
m、固有熱抵抗3500℃・cm/Wの耐火断熱層を形成するよ
うにした以外は実施例と同様にして防災シートを得た。Comparative Example 12.5 m thick ceramic wool was used instead of carbon fiber.
m, a disaster prevention sheet was obtained in the same manner as in the example except that a fire-resistant heat-insulating layer having a specific thermal resistance of 3500 ° C. · cm / W was formed.
【００３４】上記実施例および比較例で得られた防災シ
ートの防火性能を確認するため、JIS A 1302規定の「建
築物の不燃物構造部分の防火試験方法」に基づく熱源を
用いる燃焼試験を行った。In order to confirm the fire prevention performance of the disaster prevention sheets obtained in the above Examples and Comparative Examples, a fire test was conducted using a heat source based on the “Fire test method for incombustible structural parts of buildings” specified in JIS A 1302. Was.
【００３５】すなわち、66kV級ＣＶケーブルを収容した
ＦＲＰからなるケーブル管の外周に防災シートを巻付け
粘着ステンレステープで固定した後、その下方より加熱
バーナ（UL規格94V 規定バーナ）で、加熱バーナに最も
近い部分の防災シートの表面温度がJIS A 1302規定の２
級加熱曲線に一致するように加熱した。That is, after a fire prevention sheet is wrapped around the outer periphery of a cable tube made of FRP accommodating a 66 kV class CV cable and fixed with an adhesive stainless tape, the heating burner (UL standard 94V regulated burner) is applied from below to the heating burner. The surface temperature of the nearest part of the disaster prevention sheet is 2 according to JIS A 1302.
The heating was performed so as to match the heating class.
【００３６】加熱開始20分後の図４に示す測定点Ａ〜Ｅ
での温度を表１に示す。なお、図４において、７は加熱
バーナ、８は防災シート、９はＦＲＰ管、１０はケーブ
ルを示している。Measurement points A to E shown in FIG. 4 20 minutes after the start of heating
Are shown in Table 1. In FIG. 4, reference numeral 7 denotes a heating burner, 8 denotes a disaster prevention sheet, 9 denotes an FRP tube, and 10 denotes a cable.
【００３７】[0037]
【表３】 表３からも明らかなように、実施例の防災シートは、Ｆ
ＲＰ管の内表面温度が90℃と、適度な断熱性を有してお
り、外部の熱からケーブルを保護することができるとと
もに、通常時にはケーブルの放熱も行わせることがで
き、ケーブルの許容電流を大きく低下させないことが推
察される。[Table 3] As is clear from Table 3, the disaster prevention sheet according to the example is F
The inner surface temperature of the RP tube is 90 ° C, and it has a suitable thermal insulation property. It can protect the cable from external heat, and can also radiate the cable at normal times. It is presumed that it does not significantly decrease
【００３８】[0038]
【発明の効果】以上説明したように、本発明の防災シー
トおよび防災工法は、施工が容易で、橋梁に添架された
ケーブル管外周へも容易かつ短時間に施工することがで
きる。しかも、防災シートは適度な断熱性を有している
ので、通常時のケーブルからの放熱を大きく妨げること
はなく、ケーブルの許容電流への影響が抑えられ、一
方、火災等が発生した時には、十分に熱を遮断してケー
ブルを保護することができる。さらに、金属基材によっ
て外からの機械的損傷も防止される。As described above, the disaster prevention sheet and the disaster prevention method of the present invention can be easily applied and can be easily and quickly applied to the outer circumference of a cable pipe attached to a bridge. Moreover, since the disaster prevention sheet has moderate heat insulation, it does not significantly hinder the heat radiation from the cable during normal operation, and the influence on the allowable current of the cable is suppressed. The heat can be sufficiently shut off to protect the cable. Furthermore, external mechanical damage is also prevented by the metal substrate.
【図１】本発明の防災シートの一例を示す断面図。FIG. 1 is a sectional view showing an example of a disaster prevention sheet of the present invention.
【図２】本発明の防災シートの施工方法を説明する概略
斜視図。FIG. 2 is a schematic perspective view illustrating a method for applying the disaster prevention sheet of the present invention.
【図３】本発明の防災シートの施工方法を説明する概略
斜視図。FIG. 3 is a schematic perspective view illustrating a method for applying the disaster prevention sheet of the present invention.
【図４】本発明の実施例の防災シートについて行った燃
焼試験の温度測定点を示す断面図。FIG. 4 is a cross-sectional view showing temperature measurement points in a combustion test performed on the disaster prevention sheet of the example of the present invention.
１………金属基材 ２………接着剤層 ３………耐火断熱層 ４………防災シート ５………ケーブル管 ６………粘着テープ ７………線状体 DESCRIPTION OF SYMBOLS 1 ... Metal base material 2 ... Adhesive layer 3 ... Fireproof heat insulation layer 4 ... Disaster prevention sheet 5 ... Cable tube 6 ... Adhesive tape 7 ... Linear body
【手続補正書】[Procedure amendment]
【提出日】平成１１年８月９日[Submission date] August 9, 1999
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】発明の名称[Correction target item name] Name of invention
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【発明の名称】 ケーブル用防災シートおよびこれを用
いた防災工法[Title of the Invention] Disaster prevention sheet for cable and disaster prevention method using the same
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Correction target item name] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【特許請求の範囲】[Claims]
【手続補正３】[Procedure amendment 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００９[Correction target item name] 0009
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００９】[0009]
【課題を解決するための手段】本発明のケーブル用防災
シートは、金属基材上に、接着剤層を介して、限界酸素
指数が35以上で、固有熱抵抗が500〜2500℃・cm/Wの耐火
断熱層を具備してなることを特徴としている。According to the present invention, there is provided a cable disaster-prevention sheet comprising a metal substrate, an adhesive layer, and an oxygen barrier.
It is characterized by comprising a refractory heat insulating layer having an index of 35 or more and a specific thermal resistance of 500 to 2500 ° C. · cm / W.
Claims (7)
熱抵抗が 500〜2500℃・cm/Wの耐火断熱層を具備してな
ることを特徴とする防災シート。1. A disaster prevention sheet comprising a metal substrate and a fire-resistant heat-insulating layer having a specific thermal resistance of 500 to 2500 ° C. · cm / W via an adhesive layer.
火断熱層は炭素繊維を主体とする耐熱繊維からなること
を特徴とする防災シート。2. The disaster prevention sheet according to claim 1, wherein the fire-resistant heat-insulating layer is made of heat-resistant fibers mainly composed of carbon fibers.
いて、金属基材はステンレスシートまたはメッキ鉄シー
トであることを特徴とする防災シート。3. The disaster prevention sheet according to claim 1, wherein the metal substrate is a stainless steel sheet or a plated iron sheet.
テンレスシートまたはメッキ鉄シートの厚さが0.05〜0.
2mm であることを特徴とする防災シート。4. The disaster prevention sheet according to claim 3, wherein the thickness of the stainless steel sheet or the plated iron sheet is 0.05 to 0.1.
Disaster prevention sheet characterized by being 2mm.
災シートにおいて、接着剤層はクロロプレンゴム系接着
剤からなることを特徴とする防災シート。5. The disaster prevention sheet according to claim 1, wherein the adhesive layer is made of a chloroprene rubber-based adhesive.
災シートで、ケーブルもしくはケーブルを収納したケー
ブル管路を包覆する工程を含むことを特徴とする防災工
法。6. The disaster prevention method according to claim 1, further comprising the step of: covering the cable or a cable conduit containing the cable with the disaster prevention sheet according to claim 1.
ブルもしくはケーブルを収納したケーブル管路を防災シ
ートで包覆する工程に先立って、前記ケーブルもしくは
ケーブルを収納したケーブル管路外周に線状体を巻き付
けておくことを特徴とする防災工法。7. The disaster prevention method according to claim 6, wherein the wire or the cable conduit containing the cable is covered with a disaster prevention sheet prior to the step of covering the cable or the cable conduit containing the cable. Disaster prevention method characterized by winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10237818A JPH11346416A (en) | 1998-03-31 | 1998-08-24 | Disaster preventive sheet for cable and disaster prevention engineering method using the same |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10-85366 | 1998-03-31 | ||
| JP8536698 | 1998-03-31 | ||
| JP10237818A JPH11346416A (en) | 1998-03-31 | 1998-08-24 | Disaster preventive sheet for cable and disaster prevention engineering method using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11346416A true JPH11346416A (en) | 1999-12-14 |
Family
ID=26426381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10237818A Pending JPH11346416A (en) | 1998-03-31 | 1998-08-24 | Disaster preventive sheet for cable and disaster prevention engineering method using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11346416A (en) |
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| JP2019207888A (en) * | 2017-02-23 | 2019-12-05 | 株式会社オートネットワーク技術研究所 | Wire Harness |
| US10867721B2 (en) | 2017-02-23 | 2020-12-15 | Autonetworks Technologies, Ltd. | Wire harness |
| CN110328939A (en) * | 2019-06-28 | 2019-10-15 | 南京荣港电气技术有限公司 | A kind of medium and high voltage cable connector fire resistant flexible explosion-proof layer and its preparation process |
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